Class / Patent application number | Description | Number of patent applications / Date published |
203029000 | Including step of adding catalyst or reacting material | 81 |
20080283383 | Method For the Distillative Purification of Slow-Evaporating Fluids - The present invention relates to a method for removing volatile compounds from sparingly volatile fluids by means of rectification using an auxiliary and also to separation methods and chemical reactions in which sparingly volatile fluids are used, the purification of which is effected by means of rectification and using an auxiliary. | 11-20-2008 |
20100084256 | SYSTEM AND METHOD OF CARBON CAPTURE AND SEQUESTRATION - Systems and methods of capturing and sequestering carbon dioxide, comprising mixing a substantially non-aqueous solvent and an alkali such that the solvent and alkali form a solvent suspension, mixing water and a flue gas containing carbon dioxide with the solvent suspension such that a reaction occurs, the reaction resulting in the formation of a carbonate, water and heat. | 04-08-2010 |
20100163400 | METHOD OF DISTILLATION AND/OR A DISTILLATION COLUMN - The invention comprises a method of reactive-distillation which includes the step of distillation of the surplus light components and separation of the heavy phase components in the same vessel. This may be achieved by utilising a reactive-distillation column having a plurality of trays. A weir is provided on at least most trays and at least most weirs have sufficient height to enable a residence time of material on the tray at least double the residence time of a conventional tray in normal distillation. | 07-01-2010 |
20120024689 | METHOD FOR THE CONTINUOUS SEPARATION OF MIXTURES COMPRISING MORPHONLINE (MO), MONOAMINODIGLYCOL (ADG), AMMONIA AND WATER BY MEANS OF DISTILLATION - Processes for the continuous fractional distillation of a mixture comprising morpholine (MO), monoaminodiglycol (ADG), ammonia and water from a reaction of diethylene glycol (DEG) with ammonia, the process comprising: (i) separating off ammonia from the mixture at a top of a first distillation column K10; (ii) feeding a bottom fraction from the first distillation column to a second distillation column K20, wherein water and an organic product are separated off at a top of the second distillation column at a top temperature of 45 to 198° C. and a pressure in the range from 0.1 to 15 bar; (iii) feeding a bottom fraction from the second distillation column to a third distillation column K30, wherein morpholine and an organic product having a boiling point of <140° C. (1.013 bar) are separated off at a point selected from a top and a side offtake of the third distillation column, and monoaminodiglycol and an organic product having a boiling point of >190° C. (1.013 bar) are separated off at a bottom of the third ditillation column, and (iv) feeding the morpholine-comprising stream from the third distillation column to a fourth column K40, wherein morpholine is separated off at a side offtake of the fourth column, an organic product having a boiling point of ≦128° C. (1.013 bar) is separated off at a top of the fourth distillation column and an organic product having a boiling point of ≧128° C. (1.013 bar) is separated off at a bottom of the fourth distillation column. | 02-02-2012 |
20120279848 | ALKYLATION UNIT AND PROCESS RELATING THERETO - One exemplary embodiment can be an alkylation unit. The alkylation unit can include at least one alkylation reaction zone having an alkylation catalyst, at least one cooler communicating with the at least one alkylation reaction zone, a settler communicating with the at least one alkylation reaction zone and the at least one cooler, a fractionation zone receiving an effluent from the settler passing through a line, and a boot coupled to a substantially horizontal portion of the line. Generally, the boot receives an effluent portion rich in the alkylation catalyst. | 11-08-2012 |
20130001064 | METHOD TO UPGRADE HEAVY OIL IN A TEMPERATURE GRADIENT REACTOR (TGR) - A method of upgrading heavy oil in which the heavy oil is preheated to above a boiling point of water to remove water as steam and lighter fractions as vapours. The heavy oil passes downwardly through a series of sequential horizontal heat gradients in a temperature gradient reactor. A temperature of each sequential heat gradient progressively increases so that lighter fractions of the heavy oil vaporize with minimal cracking and heavier heavy oil fractions continue to fall by force of gravity downwards. As they pass through further sequential heat gradients of progressively increasing temperature, they tend to crack into lighter fractions in the presence of nascent hydrogen. Coke, formed from heavier heavy oil fractions generated and deposited on a fluidized catalytic bed a bottom of the temperature gradient reactor, is fluidized with superheated steam. The superheated steam generates the nascent hydrogen required to promote hydrogen reactions by indirect heated steam reforming and water-gas shift reactions | 01-03-2013 |
20140183028 | PROCESS FOR THE TREATMENT OF A RECYCLING STREAM FROM A PLANT FOR THE PRODUCTION OF POLYARYLENE ETHER SULFONES - A process is proposed for the treatment of a recycling stream ( | 07-03-2014 |
20140183029 | PROCESS FOR THE TREATMENT OF A RECYCLYING STREAM FROM A PLANT FOR THE PRODUCTION OF POLYARYLENE ETHER SULFONES - A process for treating a recycling stream from a plant for the production of polyarylene ether sulfones comprising
| 07-03-2014 |
20140326593 | METHOD FOR MANUFACTURING HIGH PURITY SULFURIC ACID - A method for manufacturing high purity sulfuric acid is provided. A mixed solution subsequently undergoes a first preheating step, a second preheating step, a distilling step and an evaporating step to remove peroxide, water, oxygen and insoluble impurities, so as to obtain the first gas containing sulfur trioxide, sulfuric acid and hydrogen oxide. And then, the sulfur trioxide is absorbed by a sulfuric acid solution, thereby forming the high purity sulfuric acid. | 11-06-2014 |
20150075969 | PROCESSES AND SYSTEMS FOR PURIFYING SILANE - Processes and systems for purifying silane-containing streams and, in particular, for purifying silane-containing streams that also contain ethylene are disclosed. The processes and systems may be arranged such that one or more ethylene reactors are downstream of light-end distillation operations. | 03-19-2015 |
20150353450 | PROCESS AND PLANT FOR THE PRODUCTION OF OLEFINS - The present invention relates to a process for the production of olefins from oxygenates, comprising the following steps:
| 12-10-2015 |
20170233323 | Process for Making Cyclohexanone | 08-17-2017 |
20180021692 | PROCESS FOR REMOVING IMPURITIES FROM ACETIC ACID | 01-25-2018 |
203030000 | For polymerizing unwanted component | 2 |
20120199467 | SEPARATION OF COMPONENTS FROM A MULTI-COMPONENT HYDROCARBON STREAM WHICH INCLUDES ETHYLENE - A process to separate a multi-component hydrocarbon stream which includes ethylene and other components with at least some of the components being present in a number of phases, is provided. The process includes in a first flash stage, flashing the multi-component hydrocarbon stream, from an elevated pressure and temperature to a pressure in the range of 10-18 bar(a), producing a first ethylene-containing vapour stream at a pressure in the range of 10-18 bar(a) and a multi-phase stream which includes some ethylene. In a second flash stage, the multi-phase stream is flashed to a pressure of less than 6 bar(a), producing a second vapour stream at a pressure of less than 6 bar(a) and a bottoms stream. The first ethylene-containing vapour stream is removed from the first flash stage, the second vapour stream is removed from the second flash stage and the bottoms stream is removed from the second flash stage. | 08-09-2012 |
20150360148 | Devolatilisation Apparatus and a Process for use Thereof - A static devolatilisation apparatus ( | 12-17-2015 |
203031000 | Oxidizing material | 13 |
20100140075 | METHOD FOR PURIFYING ACETONE - A method for purifying a crude acetone raw material containing low molecular weight impurities using two columns is disclosed. The method comprises the steps of feeding the crude acetone raw material into a first column; adding an alkaline reagent and an oxidative agent into the first column to form high molecular weight impurities; removing a top fraction from the first column by distillation to form bottom fraction comprising an acetone mixture comprising high molecular weight impurities; feeding the bottom fraction comprising the acetone mixture obtained to a second rectification column at a charge point on the column; adding an alkaline reagent to the second column above the charge point of the bottom fraction fed; and separating a purified acetone from the high molecular weight impurities and removing the purified acetone as a top fraction by distillation in the second column, wherein the second rectification column is operated at atmospheric pressure. | 06-10-2010 |
20110000779 | METHOD AND DEVICE FOR TREATMENT OF FLUID STREAMS THAT OCCUR DURING GASIFICATION - A method and a device for treating fluid streams produced during the combustion of carbon- and ash-containing fuels optimally uses the heat content contained in the system, as well as the amount of water for cooling and condensation required during recirculation of the latter. Suspension withdrawn from the mixing vessel is expanded in at least one subsequent stage during the evaporation of at least part of the water and reduction of the temperature, The vapor produced is cooled by direct contact with water and at least partially condensed out. In the device, a line between a lower section of the mixing vessel leads to a first expansion vessel that is designed as a scrubber tower, the scrubber tower being provided with a condensate collection bottom and a recirculation line towards the mixing vessel for the forming condensate, which mixing vessel is equipped with spray heads. | 01-06-2011 |
20110036704 | PROCESS FOR REMOVAL OF ACRYLIC ACID FROM THE PRODUCT GAS MIXTURE OF A HETEROGENEOUSLY CATALYZED PARTIAL GAS PHASE OXIDATION OF AT LEAST ONE C3 PRECURSOR COMPOUND - A process for removal of a crude acrylic acid from a product gas mixture which comprises glyoxal as a by-product from a heterogeneously catalyzed partial gas phase oxidation of at least one C | 02-17-2011 |
20110067993 | TREATMENT OF HYDROCARBON FLUIDS WITH OZONE - A method of treating a hydrocarbon fluid that includes contacting the hydrocarbon fluid with an effective amount of ozone. A method for separating contaminants from a contaminated material includes supplying the contaminated material to a processing chamber, moving the contaminated material through the processing chamber, heating the contaminated material by externally heating the processing chamber so as to volatilize the contaminants in the contaminated material, removing vapor resulting from the heating, wherein the vapor comprises the volatilized contaminants, collecting, condensing, and recovering the volatilized contaminants, and contacting the volatilized contaminants with an effective amount of ozone. | 03-24-2011 |
20120073952 | METHOD FOR RECYCLING CUTTING FLUID - A method for recycling cutting fluid, comprises a step of “separation,” by preparing and oxidizing a cutting fluid of silicon including a silicon mixture and a cutting fluid at 150° C. to 350° C. in a container, to obtain a vaporized cutting fluid and a silicon slurry; and a step of “recycling,” by condensing the vaporized cutting fluid to obtain a recycling cutting fluid. | 03-29-2012 |
20120175240 | METHOD AND APPARATUS FOR ODORANT REMOVAL - Odorant from a process stream is removed by passing the stream ( | 07-12-2012 |
20130153401 | Brine purification process - A process for purifying a brine of organic compounds comprising: (a) supplying a brine that comprises at least one organic compound; (b) feeding at least one stripping zone with the brine from (a) and at least one stripping agent; (c) withdrawing from the stripping zone at least one fraction (I) consisting essentially of brine, the content of the organic compound being lower in fraction (I) than in the brine from step (a), and at least one fraction (II) consisting essentially of the stripping agent; wherein the temperature (T | 06-20-2013 |
20130175157 | FLAKES MANAGEMENT IN HYDROCARBON PROCESSING UNITS - The instant invention discloses a method for the improvement of flakes recovery from hydrocarbon processing units and in particular slurry reactors as well as slurry flakes obtained thereof. | 07-11-2013 |
20130319846 | METHOD FOR PURIFYING ACETONE - A method for purifying a crude acetone raw material containing low molecular weight impurities using two columns is disclosed. The method comprises the steps of feeding the crude acetone raw material into a first column; adding an alkaline reagent and an oxidative agent into the first column to form high molecular weight impurities; removing a top fraction from the first column by distillation to form bottom fraction comprising an acetone mixture comprising high molecular weight impurities; feeding the bottom fraction comprising the acetone mixture obtained to a second rectification column at a charge point on the column; adding an alkaline reagent to the second column above the charge point of the bottom fraction fed; and separating a purified acetone from the high molecular weight impurities and removing the purified acetone as a top fraction by distillation in the second column, wherein the second rectification column is operated at atmospheric pressure. | 12-05-2013 |
20130334028 | METHOD FOR CONCENTRATING AQUEOUS 3-HYDROXY-2,2-DIMETHYLPROPANAL SOLUTION - The present invention provides a method for concentrating an aqueous solution containing at least 3-hydroxy-2,2-dimethyl propanal and/or a dimer thereof, which includes subjecting a mixed solution of an aqueous solution containing at least 3-hydroxy-2,2-dimethyl propanal and/or a dimer thereof and an azeotropic agent to azeotropic distillation in a distillation column to distil off water and the azeotropic agent from the mixed solution, wherein the mixed solution is prepared by adding, as the azeotropic agent, at least one selected from the group consisting of 1-butanol, 2-butanol, 2-methyl-1-propanol, 1-pentanol and 1-hexanol to the aqueous solution. | 12-19-2013 |
20140166470 | WORKUP OF A CYCLODODECANONE CYCLODODECANOL MIXTURE IN A DIVIDING WALL COLUMN - A process for removing a cyclododecanone-rich fraction from a dehydrogenation mixture comprising low boilers, cyclododecanone, medium boilers, cyclododecanol and high boilers is provided. According to the process, the cyclododecanone is separated from the cyclododecanol in a dividing wall column. The apparatus which is the dividing wall column is also provided within this invention. | 06-19-2014 |
20140332367 | Method of Separation - The present invention provides a separation method of separating (A) and (B), comprising: a step of separating at least either an active hydrogen-containing compound (A) or a compound (B) that reversibly reacts with (A) from a mixture containing (A) and (B) by distillation in a multistage distillation column; and a step of supplying the mixture to an inactive region formed within the multistage distillation column. | 11-13-2014 |
20150114819 | REMOVING CARBON NANOTUBES FROM A WATER SYSTEM - Methods and a system for removing carbon nanotubes from a water stream are provided herein. The system includes a purification vessel, wherein the purification vessel is configured to form a carbon oxide from the carbon nanotubes within the water stream. | 04-30-2015 |
203032000 | Reducing material | 22 |
20080289949 | Method for processing effluent from chloromethylation of vinyl aromatic polymers - A method for processing effluent from a chloromethylation of a vinyl aromatic polymer wherein the effluent comprises catalyst and volatile organics, and wherein the method comprising the steps of:
| 11-27-2008 |
20090057129 | METHOD FOR PRODUCING TRICHLOROSILANE AND METHOD FOR PRODUCING POLYCRYSTALLINE SILICON - A hydrogenation reaction vessel makes STC-containing substance react with hydrogen to convert the substance into TCS. A low boils removal column separates a chlorosilane distillate discharged from a hydrogenation reaction vessel into TCS and a mixture distillate containing hyper-hydrogenated chlorosilane, and circulates the mixture distillate containing hyper-hydrogenated chlorosilane to the hydrogenation reaction vessel. The mixture distillate containing the hyper-hydrogenated chlorosilane separated in the low boils removal column is circulatingly supplied to the hydrogenation reaction vessel. Accordingly, low boils by-product conventionally wasted is circulated and recycled in the process, which results in enhancing a yield of TCS production. | 03-05-2009 |
20090065346 | PROCESS FOR THE DISTILLATIVE SEPARATION OF MIXTURES COMPRISING MONOETHYLENE GLYCOL AND DIETHYLENTRIAMINE - Processes comprising: providing a mixture comprising monoethylene glycol and diethylenetriamine; and subjecting the mixture to extractive distillation with a diethylenetriamine-selective solvent comprising triethylene glycol to provide a first stream comprising monoethylene glycol and a second stream comprising diethylenetriamine; wherein the first stream is substantially free of diethylenetriamine, and wherein the second stream is substantially free of monoethylene glycol. | 03-12-2009 |
20090071813 | METHOD FOR CHEMICALLY REACTING AND SEPARATING A MIXTURE IN A COLUMN - Processes for chemical reaction and separation in a column comprising, (a) providing one or more reactants to a column; and (b) carrying out at least partially superimposed reactive distillation and extractive distillation on the one or more reactants in the column to form a reaction product mixture comprising at least two components and separate at least one of the components; wherein an ionic liquid is present in the column. | 03-19-2009 |
20090166173 | Effluent gas recovery process for silicon production - Purified SiHCl3 is used as a sweep gas across a permeate side of a gas separation membrane receiving effluent gas from a polysilicon reactor. The combined sweep gas and permeate is recycled to the reactor. | 07-02-2009 |
20090183981 | INTEGRATED PYROLYSIS GASOLINE TREATMENT PROCESS - An integrated process for treating pyrolysis gasolines, including: feeding the pyrolysis gasoline to a first stage wherein the pyrolysis gasoline is substantially depentanized and acetylene and diolefins are reacted with hydrogen to produce an effluent having a reduced acetylene and diolefin content; and feeding the effluent to a second stage, wherein the second stage comprises a catalytic distillation hydrotreating process. The second stage may include a first catalytic distillation reactor system comprising a first distillation reaction zone containing a first hydrogenation catalyst, and the process may further include treating a C | 07-23-2009 |
20110005914 | Selective dehydrohalogenation of tertiary halogenated hydrocarbons and removal of tertiary halogenated hydrocarbon impurities from a halogenated hydrocarbon product - A process for converting a tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro-1-propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction. | 01-13-2011 |
20120080304 | Processes for Recovering Silane From Heavy-Ends Separation Operations - Processes and systems for purifying silane-containing streams are disclosed with relatively less silane being lost in impurity streams by use of distillation and/or condensation operations. | 04-05-2012 |
20120273339 | Water Separation from Crude Alcohol Product - Recovery of alcohol, in particular ethanol, from a crude product obtained from the hydrogenation of acetic acid using various combinations of membranes and/or distillation columns. | 11-01-2012 |
20130032466 | ETHANOL SEPARATION PROCESS HAVING STRIPPING SECTION FOR REDUCING ACETALS - To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns has a stripping section that comprises at least 40 stages to favor hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product. | 02-07-2013 |
20130032467 | VAPOR SEPARATION IN ALCOHOL PRODUCTION - Two or more vapor-liquid separators are used in a process for removing at least one non-condensable gas from a crude alcohol mixture prepared by hydrogenating alkanoic acid and/or esters thereof. The vapor-liquid separators may comprise flashers or knock-out pots and are suitable for removing non-condensable gas, including those gases that are dissolved in the liquid. The multiple vapor-liquid separators may be in series prior to any separation of organic components. In addition, there may be a vapor-liquid separator before and after a distillation column for treating the feed to the column. | 02-07-2013 |
20130062192 | Method to Recover Organic Tertiary Amines from Waste Sulfuric Acid Employing A Plug Flow Reactor - The present invention describes a method to recover an organic tertiary amine from waste sulfuric acid comprising the following steps:
| 03-14-2013 |
20130206578 | SELECTIVE DEHYDROHALOGENATION OF TERTIARY HALOGENATED HYDROCARBONS AND REMOVAL OF TERTIARY HALOGENATED HYDROCARBON IMPURITIES FROM A HALOGENATED HYDROCARBON PRODUCT - A process for converting a tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro--propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro- 1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction. | 08-15-2013 |
20130206579 | SELECTIVE DEHYDROHALOGENATION OF TERTIARY HALOGENATED HYDROCARBONS AND REMOVAL OF TERTIARY HALOGENATED HYDROCARBON IMPURITIES FROM A HALOGENATED HYDROCARBON PRODUCT - A process for converting a tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro-1-propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction. | 08-15-2013 |
20130213794 | ABSORBER DEMETHANIZER FOR FCC PROCESS - A process for recovering ethylene is disclosed, the process including: recovering a ethylene-containing stream comprising methane, ethylene, and nitrogen oxides from at least one of an ethylene production process and an ethylene recovery process; separating the ethylene-containing stream via extractive distillation using at least one C | 08-22-2013 |
20130299335 | PURIFICATION OF TiCl4 THROUGH THE PRODUCTION OF NEW CO-PRODUCTS - The present disclosure relates to reacting tin metal or SnCl | 11-14-2013 |
20140116872 | METHOD FOR PRODUCING 1, 4-BUTANEDIOL - An object of the present invention is to provide an industrially advantageous production method of 1,4BG, ensuring that generation of THF in the crude 1,4BG can be also suppressed and at the same time, the concentration of 2-(4-hydroxybutoxy)-tetrahydrofuran can be reduced. The present invention relates to a method for producing 1,4-butanediol, comprising heating crude 1,4-butanediol containing from 0.01 to 0.5 wt % of 2-(4-hydroxybutoxy)-tetrahydrofuran and from 1 to 25 wt % of water at 80° C. or more in the presence of an amine to obtain purified 1,4-butanediol. | 05-01-2014 |
20140238840 | SYSTEM AND METHOD FOR RECYCLING HIGH-BOILING-POINT WASTE PHOTORESIST STRIPPER - This invention relates to a system and method for recycling a high-boiling-point waste photoresist stripper generated in processes of manufacturing LCDs or semiconductor devices, wherein an expensive high-boiling-point stripper solvent can be easily recycled at high yield and high-purity electronic grade. This system includes a first distillation device for removing low-boiling-point impurities, a second distillation device for recycling a stripper solvent composition while removing high-boiling-point impurities, and a third distillation device for removing trace water, thus recovering the stripper solvent composition, and further includes a fourth distillation device for additionally recycling a stripper solvent, thus additionally recovering a high-boiling-point stripper solvent, and this method includes removing low-boiling-point impurities, recycling a stripper solvent composition while removing high-boiling-point impurities, and removing trace water, thus recovering the stripper solvent composition, and further includes additionally recycling a stripper solvent. | 08-28-2014 |
20150027873 | ITERATIVE REACTIVE DISTILLATION OF DYNAMIC ESTER MIXTURES - An iterative method of performing a reactive distillation of dynamic ester libraries containing n×m (m≦n) components, to reduce such mixtures to n pure ester species. The distillation occurs under anhydrous conditions, using metal alkoxide catalysts. Vacuum distillation of the mixture then isolates the most volatile ester at the expense of other (2n−2) compounds. The volatile ester is removed, and the process repeated with progressively less volatile ester species, yielding high purities and greater than 70% yields. | 01-29-2015 |
20150290558 | DISTILLATION OF SILANE MIXTURES IN THE PRESENCE OF A NITRILE OR AMINE - Distillation of silane mixtures in the presence of a nitrile, amine, or mixtures thereof, the nitrile and amine each having a boiling point of at least 120° C. at 1013 hPa, is effective to remove metal halide, organometal halides, and other contaminants. | 10-15-2015 |
20150353453 | SELECTIVE DEHYDROHALOGENATION OF TERTIARY HALOGENATED HYDROCARBONS AND REMOVAL OF TERTIARY HALOGENATED HYDROCARBON IMPURITIES FROM A HALOGENAGED HYDROCARBON PRODUCT - A process for converting tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro-1-propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction. | 12-10-2015 |
20150368190 | PROCESS FOR SEPARATING AN ISOCYANATE PREPARED BY PHOSGENATION OF A PRIMARY AMINE IN THE GAS PHASE FROM THE GASEOUS CRUDE PRODUCT OF THE PHOSGENATION - The present invention relates to a process for separating an isocyanate prepared by reaction of a primary amine with an excess of phosgene in the gas phase from the gaseous crude product obtained in the reaction, wherein
| 12-24-2015 |
203033000 | Inorganic salt containing oxygen in the anion | 1 |
20110155557 | Method for Obtaining Lactide - Processes for producing lactide from lactic acid oligomers are described herein. The processes generally include heating a lactic acid oligomer in the presence of a catalyst at a temperature of between 150° C. and 300° C. under a pressure of less than 0.01 MPa to form a lactide; distilling the lactide; and condensing and recovering the lactide, wherein the catalyst is a metal salt of the phosphite anion PO | 06-30-2011 |
203034000 | Acid | 11 |
20080283384 | Process for Producing Trioxane and at Least One Comonomer - The invention relates to a process for preparing trioxane and at least one comonomer for preparing (co)polymers based on trioxane, in which, in a first step, formaldehyde the at least one comonomer reactant are reacted in aqueous solution to give trioxane and comonomer, to obtain a reaction mixture A | 11-20-2008 |
20110220483 | PROCESS FOR THE EXTRACTION OF SQUALENE, STEROLS AND VITAMIN E CONTAINED IN CONDENSATES OF PHYSICAL REFINING AND/OR IN DISTILLATES OF DEODORIZATION OF PLANT OILS - The invention describes a global method for extracting sterols, vitamin E, squalene and other vegetable hydrocarbons from deodorization distillates of vegetable oils. After esterification of the free fatty acids, followed by trans-esterification of the combined fatty acids (glycerides and sterides) with the same short alcohol, three successive distillations allow successive recovery of a first fraction of the hydrocarbons, the main fraction of alkyl esters, and then the heaviest alkyl esters with squalene. The third distillate will be used for producing squalene and a second fraction of hydrocarbons. The residue of the third distillation will be used for producing sterols and vitamin E. By using bio-ethanol, vegetable glycerol and the vegetable hydrocarbons of the method, with the method it is possible to extract each of the four unsaponifiables without any solvent of petroleum origin and claim the labels of products obtained by natural physical and chemical methods. | 09-15-2011 |
20110297528 | System and method for reduction of water consumption in purified terephthalic acid production - The invention disclosed is an apparatus and method for the recovery of acetic acid, azeotropic agent, extraction agent, re-usable water and other reaction products such as p-toluic acid, from an aqueous stream generated during a terephthalic acid production process, having superior energy efficiency and reduced water consumption. The apparatus of the invention includes: an azeotropic distillation column to remove water from acetic acid, a pair of mother liquor extraction columns sequentially connected in series for primary recovery of extraction solvent and other organics, an azeotropic agent stripper for recovery of azeotropic agent and a post-separation solvent stripper distillation column for further separation of the aqueous bottoms stream from said extraction columns into a volatiles stream comprising mainly organics with a very low amount of water and a liquid stream comprising water containing very low amounts of organics, each stream being sufficiently pure that it can be recycled for reuse in the purification of crude terephthalic acid. | 12-08-2011 |
20110297529 | PROCESSES FOR PRODUCING MONOAMMONIUM SUCCINATE FROM FERMENTATION BROTHS CONTAINING DIAMMONIUM SUCCINATE, MONOAMMONIUM SUCCINATE AND/OR SUCCINIC ACID, AND CONVERSION OF MONOAMMONIUM SUCCINATE TO SUCCINIC ACID - Processes for making monoammonium succinate (MAS) and/or succinic acid (SA) from either a clarified diammonium succinate (DAS)-containing fermentation broth or a clarified MAS-containing fermentation broth include (a) distilling the broth to form an overhead that includes water and optionally ammonia and a liquid bottoms that includes MAS or SA; (b) cooling and/or evaporating the bottoms and optionally adding an antisolvent to the bottoms to attain a temperature and composition sufficient to cause the bottoms to produce a solid portion that contains MAS or SA in contact with a liquid portion; (c) separating the solid portion from the liquid portion; and (d) recovering the solid portion. | 12-08-2011 |
20160031792 | RECOVERY OF 3-HYDROXYPROPIONIC ACID - A method for recovering a composition enriched in 3-hydroxypropionic acid from a fermentation broth comprising 3-hydroxypropionic acid and/or salts thereof comprises the steps of: (a) providing the fermentation broth having a pH of from about 2 to about 8 comprising: 3-hydroxypropionic acid and/or salts thereof, (b) acidifying the fermentation broth; (c) reducing the total sulfate ion and phosphate ion (d) distilling the resulting reduced ion aqueous solution and (e) recovering the product. | 02-04-2016 |
20160060204 | RECOVERY OF 3-HYDROXYPROPIONIC ACID - A method for recovering a composition enriched in 3-hydroxypropionic acid by providing the fermentation broth, acidifying the fermentation broth; reducing the total sulfate ion and phosphate ion concentration of the resulting aqueous solution to produce a reduced ion aqueous solution; distilling the resulting reduced ion aqueous solution and recovering the resulting aqueous distillation product comprising 3-hydroxypropionic acid | 03-03-2016 |
20160175735 | PROCESS SYSTEM FOR SEPARATING CHEMICALS, DISTILLATION COLUMN ARRANGEMENT, AND METHOD OF SEPARATING CHEMICALS | 06-23-2016 |
203035000 | Phosphoric or sulfuric acid | 4 |
20080230368 | Process for the purification of lactams - A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ε-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from said medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam to be recovered to the degree of desired purity and a distillation tails comprising the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process. | 09-25-2008 |
20100314239 | METHOD FOR PURIFYING METHACRYLIC ACID - The present invention relates to a process for purifying methacrylic acid, wherein the reaction mixture obtained by a reaction of methacrylamide with water is cooled by mixing with an aqueous medium and then passed into a phase separator. | 12-16-2010 |
20130168227 | PROCESS FOR THE PRODUCTION OF FURFURAL - Furfural is produced in one step at both high yield and high conversion from a feedstock comprising solid biomass and/or insoluble polysaccharide, in a high boiling, water-miscible solvent containing a soluble acid catalyst, and water. Furfural product and water can be distilled off, leaving non-volatile solvent behind. Because furfural contact with the acidic medium is minimized, degradation is kept to a minimum. The feedstock does not have to be pretreated. Because the biomass undergoes near complete dissolution, the residual material is flowable and easier to handle than residual solids reported from other processes. Further, certain by-products (e.g., humins, lignins) solubilized in the reaction solvent can be precipitated by addition of water or aqueous solution and then removed from the reaction mixture. | 07-04-2013 |
20160068407 | PROCESS TO RECOVER SOLUBLE CARBON AND NUTRIENTS FROM ORGANIC WASTE - The present invention relates to a process for separating liquid organic waste, comprising soluble carbon and mineral compounds including nutrients, gained after subjecting organic waste to hydrolysis and acidogenesis or to anaerobic digestion where said process comprises i. a step of adjusting the pH of the liquid organic waste to 1.8 to 2.5 by adding acid; ii. a step of distilling the pH-adjusted liquid organic waste into a distillate comprising in condensed water at least 85 to 88 w/w % of soluble carbon containing mainly volatile fatty acids, and less than 3 w/w % of nutrients comprising ammonium nitrogen and phosphates, and a residue comprising the nutrients not contained in the distillate while iii. a distillate:residue ratio in the range between 85:15 v/v % and 95:5 v/v % is maintained. | 03-10-2016 |
203036000 | Alkaline oxide or hydroxide | 5 |
203037000 | Alkali metal hydroxide | 5 |
20090065347 | Process for the purification of aromatic amines - Aromatic amines which have been obtained by reduction of aromatic nitro compounds are purified by mixing the crude amine obtained after phase separation with an aqueous, alkali metal hydroxide solution and subsequent distillation of this mixture over a distillation column. The distillation column has at least an upper and a lower rectifying part and a stripping part. The bottom product of the distillation column is partly to completely sluiced out and is partly evaporated in a main evaporator and at least one downstream re-evaporator and partly recycled back into the column. | 03-12-2009 |
20100140076 | METHOD FOR TREATING WASTE WATER CONTAINING OXYGEN-CONTAINING COMPOUND HAVING PHENOLIC HYDROXYL GROUP OF CARBONYL GROUP - Disclosed is a method for processing a waste water containing an oxygen-containing compound having a phenolic hydroxyl group or a carbonyl group, which comprises the following first step and second step. First step: An alkaline agent is added into a waste water containing an oxygen-containing compound having a phenolic hydroxyl group or a carbonyl group so that the waste water has a pH of not less than 10. Second step: The waste water to which the alkaline agent is added in the first step is distilled for separating a waste liquid in which the oxygen-containing compound having a phenolic hydroxyl group or a carbonyl group is concentrated. | 06-10-2010 |
20110214981 | Process For The Purification Of Methanol By Distillation - In a process for distillation, in a distillation column, of a crude stream of methanol produced from synthesis gas, fusel oil is removed from the distillation column as a vapour side draw from a point in the distillation column below the feed, and the vapour side draw is substantially free of alkali. A process for the production of methanol utilising this distillation process is also described. | 09-08-2011 |
20140183030 | PROCESS FOR THE PURIFICATION OF A CRUDE SOLVENT STREAM COMPRISING AN N-ALKYLPYRROLIDONE - N-alkylpyrrolidone and, as contaminant alongside this, the corresponding N-alkyl-succinimide, to give a pure solvent stream which meets the requirements for use in a process for the production of polymers, where compounds of higher and lower boiling point than the N-alkylpyrrolidone are removed by distillation, which comprises, prior to, during, or after the distillative purification process, adding a hydroxide of an alkali metal or of an alkaline earth metal in a molar amount corresponding to a molar ratio of at least 0.1:1 for this hydroxide with respect to the respective N-alkylsuccinimide in the appropriate solvent stream present prior to, during, or after the distillative purification process. | 07-03-2014 |
20140238841 | PROCESS FOR PRODUCING 2,3-BUTANEDIOL - A method of producing 2,3-butanediol includes subjecting a 2,3-butanediol culture liquid produced by microbial fermentation to nanofiltration membrane treatment and ion-exchange treatment (Step A), and then adding an alkaline substance and performing distillation (Step B). | 08-28-2014 |
203038000 | Organic material | 14 |
20080237027 | Manufacture of alcohols - Acetals are formed from a mixture comprising alcohols and aldehydes and the product is distilled to yield purified alcohols and/or acetals and/or unsaturated ethers. | 10-02-2008 |
20080264772 | Method and apparatus for esterification - The method and apparatus for improving the esterification procedure, in particular for improving the esterification procedure to obtain an ester of low carbon number such as the ethyl acetate and the isopropyl acetate, are provided. By means of the provided method and apparatus, the conversion ratio of the esterification procedure is significantly increased and hence an ester product of a relatively high purity, up to the industrial specification, is obtained. | 10-30-2008 |
20080314728 | Process and SYSTEM for the Purification of Trichlorosilane and Silicon Tetrachloride - The invention concerns a process (and a corresponding plant) for the purification of trichlorosilane and/or silicon tetrachloride comprising the following steps of treating technical grade trichlorosilane and/or technical grade silicon tetrachloride: complexation of the boron impurities (trichloride BCI3) and other metallic impurities by addition of diphenylthiocarbazone and/or triphenylchloromethane, with the formation of complex macromolecules having high boiling point, first column distillation of the complexation step products, wherein the complexed boron impurities, together with other metallic impurities are removed as bottoms, and second column distillation of the tops of the previous distillation, wherein electronic grade trichlorosilane (plus dichlorosilane possible present) and/or silicon tetrachloride are obtained as tops and phosphorus chlorides PCI3 and phosphorus containing compounds, arsenic chlorides AsCI3 and arsenic containing compounds, aluminium compounds, antimony compounds and in general all the present metals and metalloids compounds and carbo-silanes compounds, having a certain residual amount of trichlorosilane and/or silicon tetrachloride, are obtained as bottoms. | 12-25-2008 |
20090114522 | METHOD OF MINIMIZING ALDEHYDE-BASED IMPURITIES IN A PROCESS STREAM - Oxidation of an alkane to an alkanone in a process stream forms aldehyde-based impurities. A method of minimizing the aldehyde-based impurities introduces an amine into the process stream to minimize the aldehyde-based impurities. The amine interacts with the alkanone and the aldehyde-based impurities thereby forming heavy products. The method separates the heavy products from the alkanones to reduce a level of the aldehyde-based impurities. The process stream preferably includes cyclohexyl ketone as the alkanone and n-hexanal as the aldehyde-based impurity. The method is typically involved in synthesis of a caprolactam. | 05-07-2009 |
20090166174 | AZEOTROPIC DISTILLATION METHOD - An azeotropic distillation method, comprising a reaction step, a distillation step for separating and refining a reaction product, and a recovery step for collecting a reactant after the distillation step; wherein at least one component constituting the reactant in the reaction step can act as an entrainer for the azeotropic distillation in the distillation step; and a portion of the reactant capable of acting as the entrainer is supplied to the distillation step. | 07-02-2009 |
20090205945 | Process and apparatus for alkylation of benzene with aliphatic mono-olefin compound - Processes and apparatus for the alkylation of benzene with mono-olefin aliphatic compound in at least two reaction zones in the presence of solid alkylation catalyst use a crude distillation of the reaction effluent passing between reaction zones to remove a substantial portion of the alkylbenzene. The processes reduce the amount of heavies generated in an economically attractive manner. | 08-20-2009 |
20090229966 | Removing hydrocarbon impurities from acetic acid production process - A method for removing hydrocarbon impurities from an acetic acid production process is disclosed. The method comprises distilling at least a portion of the heavy organic phase from the decanter of the acetic acid production process into a vapor stream comprising the majority of methyl iodide (i.e., over 50% of the methyl iodide from the heavy organic phase) and a bottoms stream comprising the majority of acetic acid, methyl acetate, methyl iodide and the hydrocarbon impurity (i.e., over 50% of each of the components from the heavy organic phase); extracting the bottoms stream with water, an acetic acid aqueous solution, or with a methanol aqueous solution to form an organic phase comprising the majority of the hydrocarbon impurity (over 50% of the hydrocarbon impurity from the bottom stream) and an aqueous phase comprising the majority of methyl iodide (over 50% of the methyl iodide from the bottoms stream); and recycling the aqueous phase to the carbonylation reaction. | 09-17-2009 |
20090314625 | METHOD AND APPARATUS FOR STEAM BIOMASS REACTOR - A method and apparatus for a steam biomass reactor converts organic waste placed inside a sealed steam injected reactor to biogas (methane CH | 12-24-2009 |
20100032281 | Method for purifying an aqueous patassium hydroxide solution having rich silicon impurities - A method for purifying an aqueous potassium hydroxide solution having rich silicon impurities has been disclosed in the invention, which is particularly related to a method that utilizes a low-carbon alcohol (such as ethanol) for extracting said aqueous potassium hydroxide solution, and includes the steps of mixing a low-carbon alcohol with an aqueous potassium hydroxide solution having rich silicon impurities; allowing the resulting mixture therefrom to divide into an aqueous phase layer and a low-carbon alcohol phase layer that contains the aqueous potassium hydroxide solution with reduced silicon impurities, and subjecting the low-carbon alcohol phase layer to a separation process for removing the low-carbon alcohol, thereby resulting in an aqueous potassium hydroxide solution having reduced silicon impurities. | 02-11-2010 |
20110272268 | METHOD FOR REFINING DICYCLOPENTADIENE - A first method for refining dicyclopentadiene of the present invention is characterized in that the method separates and recovers dicyclopentadiene by distilling the crude dicyclopentadiene that contains dicyclopentadiene and is obtained by removing a C5 fraction and a BTX fraction from the reaction product obtained by dimerization reaction of the cracked gasoline by-produced in an ethylene plant that uses as feed stock a C2 fraction, a C3 fraction and a C4 fraction. A second method for refining dicyclopentadiene of the present invention is characterized in that the dicyclopentadiene-containing fraction refined by distillation is brought into contact with an inert gas or a hydrocarbon gas having 1 to 3 carbon atoms. | 11-10-2011 |
20110297530 | DISTILLATION OF IONIC LIQUIDS USING AN AUXILIARY DISTILLATION AGENT - Method of distilling mixtures comprising salts having a melting point of less than 200° C. at 1 bar (ionic liquids), wherein the mixtures additionally comprise an organic compound (called distillation aid below) which
| 12-08-2011 |
20120055779 | Process for the purification of polyol PFPE derivatives - A process for purifying a polyol (per)fluoropolyether derivative [polyol (P)] from a mixture of hydroxyl (per)fluoropolyether derivatives [mixture (M)]. Such polyol (P) comprising one or more hydroxyl (per)fluoropolyether derivatives [PFPE (OH)] comprising at least one (per)fluoropolyoxyalkylene chain (chain R | 03-08-2012 |
20120325645 | Process and System for the Purification of Trichlorosilane and Silicon Tetrachloride - The invention concerns a process (and a corresponding plant) for the purification of trichlorosilane and/or silicon tetrachloride comprising the following steps of treating technical grade trichlorosilane and/or technical grade silicon tetrachloride: complexation of the boron impurities (trichloride (BCl | 12-27-2012 |
20130008774 | PROCESS FOR THE PURIFICATION OF AN AQUEOUS STREAM COMING FROM THE FISCHER-TROPSCH REACTION - Process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction which comprises a distillation and/or stripping treatment, a treatment with at least one inorganic base and a treatment with at least one organic base. Said process allows at least a part of the aqueous stream coming from the Fischer-Tropsch reaction to be used as process water in the synthesis gas production plant, subsequently sent to the Fischer-Tropsch plant for the production of hydrocarbons. | 01-10-2013 |