Class / Patent application number | Description | Number of patent applications / Date published |
568868000 | Purification or recovery | 44 |
20090143628 | Industrial process for production of high-purity diol - It is an object of the present invention to provide a specific apparatus and process for industrially producing a high-purity diol by taking a cyclic carbonate and an aliphatic monohydric alcohol as starting materials. More specifically, it is an object to thus provide a specific industrial apparatus and industrial production process that are inexpensive and, for example, enable the high-purity diol to be produced in an amount of not less than 1 ton/hr, preferably not less than 2 tons/hr, more preferably not less than 3 tons/hr, stably for a prolonged period of time (e.g. not less than 1000 hours, preferably not less than 3000 hours, more preferably not less than 5000 hours). The above objects can be attained by using a continuous multi-stage distillation column E having a specified structure, and withdrawing a liquid component from the side cut outlet, which is installed at the bottom of a chimney tray having a specified structure installed in an enrichment section of the continuous multi-stage distillation column E. | 06-04-2009 |
20090187050 | METHOD FOR THE SEPARATION OF POLYMERIC BY-PRODUCTS FROM 1,4-BUTYNEDIOL - The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol. | 07-23-2009 |
20090264687 | Chemical Production Processes and Systems - Hydrogenolysis systems are provided that can include a reactor housing an Ru-comprising hydrogenolysis catalyst and wherein the contents of the reactor is maintained at a neutral or acidic pH. Reactant reservoirs within the system can include a polyhydric alcohol compound and a base, wherein a weight ratio of the base to the compound is less than 0.05. Systems also include the product reservoir comprising a hydrogenolyzed polyhydric alcohol compound and salts of organic acids, and wherein the moles of base are substantially equivalent to the moles of salts or organic acids. Processes are provided that can include an Ru-comprising catalyst within a mixture having a neutral or acidic pH. A weight ratio of the base to the compound can be between 0.01 and 0.05 during exposing. | 10-22-2009 |
20100041925 | PROCESS AND APPARATUS FOR THE RECOVERY OF ETHYLENE GLYCOL IN THE PRODUCTION OF POLYETHYLENE TEREPHTHALATE - A method and apparatus are disclosed for the recovery of ethylene glycol in a polyethylene terephthalate(PET) production process, in which water accumulating in the esterification reaction is mixed with a process fluid containing 2-methyl-1,3-dioxolane (MDO). The mixing is carried out in a tank arranged upstream of a rectification column. Through the increase in the water content in the fluid, a shift in the reaction equilibrium takes place and consequently a cleavage of the 2-methyl-1,3-dioxolane present into ethylene glycol and acetaldehyde takes place. Following the cleavage reaction, the mixture is fed from the tank into a rectification column, whereby the ethylene glycol produced from the cleavage reaction is returned to the PET production process. | 02-18-2010 |
20100145108 | Method for Purifying Product Mixtures From Transesterification Reactions - The invention relates to an industrial process for purifying the product mixture of a transesterification reaction with a polar, electrolyte-containing organic phase, in which the electrolytes are removed from the permeating polar organic phase by means of a nanofiltration step. | 06-10-2010 |
20100160691 | Methods for Converting Glycerol to Propanol - A hydrogenolysis method for converting glycerol into propylene glycol by directing a glycerol containing feed having a pH of about 10 or more to a reaction section including at least one glycerol conversion catalyst and operating at glycerol conversions conditions to form a reaction product including propylene glycol. | 06-24-2010 |
20100317902 | SEPARATION OF DIOLS FROM A MIXTURE COMPRISING DIOLS AND POLYOLS - The present invention relates to a process for separation of diols from a mixture comprising diols and polyols, for example, from a reaction mixture obtained from hydrogenolysis of sorbitol. In particular, the present invention relates to separation of diols from the mixture using a combination of a wiped-film evaporator and a molecular evaporator to obtain diols in a high yield. | 12-16-2010 |
20110065967 | Preparation of Mannitol Modification III - Methods for preparing mannitol modification III are described herein. The methods relate to preparing solutions of mannitol in a suitable solvent and an auxiliary agent and solidifying from the solutions mannitol of modification III. | 03-17-2011 |
20110263909 | Method For Reprocessing Aircraft De-Icing Agents Comprising Glycol - The invention relates to a method for reprocessing aircraft de-icing agents comprising glycol, wherein (1) the used aircraft de-icing agents are collected in a suitable device, (2) the used aircraft de-icing agent is subsequently brought to a propylene glycol content of between 55 and 75% by weight without prior separating of solid or suspended impurities by expelling water at increased temperature, (3) the concentrated used aircraft de-icing agent thus obtained is transported to a central reprocessing system, where the same is subjected to a fine distillation, and wherein (4) propylene glycol is produced as a distillate of the fine distillation. | 10-27-2011 |
20110282107 | METHOD FOR PRODUCING DEODORIZED 1,2-PROPANEDIOL - The present invention relates to a process for preparing deodorized 1,2-propanediol, to the use of the purified propanediol and to an apparatus for performing the process. | 11-17-2011 |
20120184783 | PROCESS FOR THE SEPARATION AND PURIFICATION OF A MIXED DIOL STREAM - Disclosed is a process for the purification of a mixed diol stream. The mixed diol stream comprising two-, three-, and four-carbon diols is separated into component diols by extraction with a hydrophobic solvent mixture. The diols recovered in the extractant may be removed from the extractant stream by back extraction with water or by distillation with an azeotrope-forming agent present, preferably an azeotroping agent already present in the extractant mixture. | 07-19-2012 |
20120232312 | PROCESS FOR CONVERTING GLYCERIN INTO PROPYLENE GLYCOL - A process to convert glycerin into propylene glycol and purifying the produced propylene glycol is described. The glycerin-based propylene glycol production requires only one process step compared to petroleum/natural gas-based propylene glycol production requires multiple process steps, and thus represents a cost savings. | 09-13-2012 |
20130261346 | PROCESS FOR THE PREPARATION OF DIRECTLY COMPRESSIBLE BETA MANNITOL - The present invention relates to a process for the preparation of directly compressible mannitol having a content of the δ modification of greater than 90%. | 10-03-2013 |
20140081054 | CLASS OF HDAC INHIBITORS EXPANDS THE RENAL PROGENITOR CELLS POPULATION AND IMPROVES THE RATE OF RECOVERY FROM ACUTE KIDNEY INJURY - The invention concerns separation methods and systems including those comprising a continuous chromatographic simulated moving bed integrated with vapor compression distillation to create a high efficiency separations platform applicable to a broad range of separation functions. | 03-20-2014 |
20140235900 | METHOD AND APPARATUS FOR THE REMOVAL OF POLYVALENT CATIONS FROM MONO ETHYLENE GLYCOL - The invention relates to a method and an apparatus for the removal of polyvalent cations, in particular divalent cations, from mono ethylene glycol. Mono Ethylene Glycol (MEG) is used to prevent hydrate formation in pipelines transporting gas, condensate and water. It may also contribute to pipeline corrosion control. The invention describes a method for the removal of polyvalent cations from mono ethylene glycol, comprising providing a feed of aqueous mono ethylene glycol comprising dissolved gas and salts of divalent cations (rich MEG), heating the aqueous mono ethylene glycol to a heated mixture, causing precipitation of at least part of the salts and release of at least part of the dissolved gas, in particular carbon dioxide, separation of released gas from the mono ethylene glycol, separation of at least part of the precipitated salts from the mono ethylene glycol, distillation of at least part of the water from the heated mixture, to yield hot dewatered mono ethylene glycol (lean MEG), wherein a first part of the hot dewatered mono ethylene glycol is lead back to the aqueous mono ethylene glycol feed to provide at least part of the heat for heating the aqueous mono ethylene glycol. | 08-21-2014 |
20140256990 | HYDRATE INHIBITOR RECOVERY PROCESS - A system and method for recovery of hydrate inhibitor from a fluid comprising hydrate inhibitor, water, mineral salt ions and salt particles is disclosed. Wherein, the system comprises: -an indirectly heated paddle dryer with a fluid inlet, at least one vapor outlet and a dry salt outlet -a vapor separation unit in fluid communication with the at least one vapor outlet for separation of the vapor to recover the hydrate inhibitor. | 09-11-2014 |
20140309461 | METHOD FOR PRODUCING HIGH-PURITY 1,5-PENTANEDIOL - The present invention has an object to provide a method for efficiently producing high-purity 1,5-pentanediol by reacting tetrahydrofurfuryl alcohol with hydrogen. This manufacturing method for producing high-purity 1,5-pentanediol comprises: step (I): a step of obtaining a crude reaction product by a hydrogenolysis reaction of tetrahydrofurfuryl alcohol with hydrogen carried out in the presence of a copper-containing catalyst with reaction temperature of 200 to 350° C. and reaction pressure of 1 to 40 MPa until conversion rate of tetrahydrofurfuryl alcohol reaches 80% or less; step (II): a step of separating tetrahydrofurfuryl alcohol and crude 1,5-pentanediol (A) from the crude reaction product obtained in the step (I), and then, supplying recovered tetrahydrofurfuryl alcohol as a raw material for the step (I); and step (III): a step of obtaining the high-purity 1,5-pentanediol by distillation of the crude 1,5-pentanediol (A) obtained in the step (II). | 10-16-2014 |
20150112102 | SYSTEM AND METHOD FOR REMOVAL OF HEAVY METAL IONS FROM A RICH HYDRATE INHIBITOR STREAM - Method and system for removal of heavy metal ions from a rich hydrate inhibitor stream, wherein the method comprises •a) adding a selective heavy metal reactant to the rich hydrate inhibitor stream, forming a fluid stream comprising heavy metal salt particles, •b) separating the obtained fluid stream in three streams a hydrocarbon stream, a recovered rich hydrate inhibitor stream, and a slurry comprising the heavy metal salt particles, •c) separating remaining hydrate inhibitor from the slurry thereby obtaining a concentrated rest comprising the heavy metal salt particles. | 04-23-2015 |
20150290628 | HYDROGENOLYSIS CATALYSTS AND USES THEREOF - A hydrogenation catalyst comprising nickel, rhenium, and cadmium is disclosed. Process of using hydrogenation catalyst for producing propylene glycol from polyol feedstock are also disclosed. The present invention relates generally to catalysts and more particularly, to catalysts having an enhanced ability to produce propylene glycol from sugar alcohols while reducing the production of by-products. | 10-15-2015 |
20150361016 | Salt Removal and Transport System and Method For Use In A Mono Ethylene Glycol Reclamation Process - A system for removing salt from a rich mono ethylene glycol (MEG) stream being fed into a flash separator isolates the fluid residing in the brine column of the separator from the MEG and introduces a swirling motive fluid into the column. The swirling motive fluid comes into contact with salt components residing in the isolated fluid of the column to create a salt slurry. The salt slurry is then removed and sent to a brine generation vessel. Saturated brine from the vessel is transported back to the column to replace the motive fluid in the column. | 12-17-2015 |
20160002130 | Divalent Ion Removal From Monoethylene Glycol (MEG) Feed Streams - A system and process for removing divalent ions from a MEG feed stream is presented. The system includes a chemical treatment tank where chemicals are mixed with the feed stream to form insoluble carbonate and hydroxide salts. The system also includes a membrane-type solid-liquid separation unit that receives the feed stream from the chemical treatment tank and separates it into a filtrate containing MEG and a retentate containing the insoluble salts. The system may also include washing the retentate to remove additional MEG, which is then recycled to a MEG regeneration or reclamation process. The system may also include a dryer that receives waste slurry from the solid-liquid separation unit and dries it to form a solid waste, thereby facilitating its handling, storage, and disposal. | 01-07-2016 |
20160023977 | System For Removing Salt From A Rich Mono Ethylene Glycol Stream - A system for, and method of, recovering salt from fluid stream in a recycle loop of a flash separator has a desanding hydrocyclone located in the hot recycle loop of the flash separator; a first solids fluidization device located at the bottom end of the flash separator's brine column; a second desanding hydrocyclone arranged to receive a salt slurry stream created by the first solids fluidization device; and an accumulator located downstream of the second desanding hydrocyclone and having a second solids fluidization device located at its bottom end. Each solids fluidization device causes a motive fluid to exit the device in a swirling motion to fluidize the salt components contained in the resident fluid. The overflow from the second desanding hydrocyclone is the motive fluid for the brine column and a produced water, condensate water, or seawater stream is the motive fluid for the accumulator. | 01-28-2016 |
20160075622 | PROCESS FOR THE SEPARATION AND PURIFICATION OF A MIXED DIOL STREAM - Disclosed is a process for the purification of a mixed diol stream. The mixed diol stream comprising two-, three-, and four-carbon diols is separated into component diols by extraction with a hydrophobic solvent mixture. The diols recovered in the extractant may be removed from the extractant stream by back extraction with water or by distillation with an azeotrope-forming agent present, preferably an azeotroping agent already present in the extractant mixture. | 03-17-2016 |
20160090342 | GLYCOL RECOVERY WITH SOLVENT EXTRACTION - A method of recovering an alcohol from an aqueous stream comprising: providing an aqueous stream comprising water and an alcohol; providing a solvent stream; combining the aqueous stream and the solvent stream; and recovering at least a portion of the alcohol by liquid-liquid extraction. | 03-31-2016 |
20160096790 | PROCESS FOR THE SEPARATION OF 1,4-BUTANEDIOL - The invention provides a process for the recovery of 1,4-butanediol from an aqueous stream, said process comprising the steps of providing the aqueous stream, providing a first solvent stream, combining said aqueous stream with said first solvent stream and recovering at least a portion of the 1,4-butanediol by liquid-liquid extraction. | 04-07-2016 |
20160175732 | Salt Removal And Transport System And Method For Use In A Mono Ethylene Glycol Reclamation Process | 06-23-2016 |
20170233317 | System For Removing Salt From A Rich Mono Ethylene Glycol Stream | 08-17-2017 |
568869000 | Of glycerol | 12 |
20090247792 | Process for Purification of Glycerol - A process for the recovery of glycerol comprises contacting an aqueous feed composition that comprises water, glycerol, and at least one contaminant with a solvent extractant comprising at least one C5-C8 alkanol, optionally in admixture with at least one alkane, to form a first mixture, and separating the first mixture into a first solvent phase and a first aqueous phase. The first solvent phase comprises a majority (more than 50 wt %) of the solvent extractant and a majority of the glycerol that was present in the aqueous feed composition. The weight ratio in the first solvent phase of glycerol to a contaminant present is greater than the weight ratio of glycerol to the contaminant in the aqueous feed composition. The first aqueous phase comprises a majority of the water from the aqueous feed composition and at least some of the contaminant from the aqueous feed composition. | 10-01-2009 |
20110112336 | PURIFICATION OF CRUDE GLYCEROL - Crude glycerol obtained from raw materials, such as the glycerol obtained during the production of biodiesel or glycerol obtained during the conversion of fats or oils, is purified by forming a dioxolane therefrom by reacting the crude glycerol with a ketone or aldehyde, separating the dioxolane thus formed, converting the dioxolane into purified glycerol and ketone/aldehyde, and recovering the glycerol thus purified. | 05-12-2011 |
20120253082 | METHOD OF PRODUCING DIOL OR TRIOL - A method for producing a diol or triol, which has a step of removing impurities contained in a diol- or triol-containing solution, is provided. In the method, a diol- or triol-containing solution is filtered through a nanofiltration membrane having a polyamide-containing functional layer. The diol- or triol-containing solution is then collected from the permeate flow of the nanofiltration membrane. | 10-04-2012 |
20130165699 | PROCESS FOR PURIFYING CRUDE GLYCEROL - A process is described for purifying crude glycerol obtained from raw materials such as glycerol obtained during manufacture of biodiesel or glycerol obtained during conversions of fats or oils. Further described, is how the process dissolves glycerol in an organic solvent and forms an insoluble phase comprising the salts of the crude glycerol. | 06-27-2013 |
20140128640 | METHOD OF MAKING GLYCEROL - Method of producing glycerol that includes mixing a peroxide stream with an olefenic alcohol stream to form a feed stream; processing the feed stream in a high shear device to produce a high shear dispersion of peroxide and olefinic alcohol, wherein the high shear device is configured with a rotor and a stator separated by a shear gap; and contacting the high shear dispersion with a catalyst in a reactor to produce glycerol. | 05-08-2014 |
20160052847 | PRODUCTION OF PARTIALLY REFINED WASTE GLYCEROL - The disclosure relates to a novel glycerol purification process that produces partially refined waste glycerol for a variety of industrial applications. The disclosure encompasses a salt-containing partially refined glycerol composition that is suitable as a fermentation grade glycerol. | 02-25-2016 |
20160200652 | PRODUCTION OF PARTIALLY REFINED WASTE GLYCEROL | 07-14-2016 |
568870000 | Ion exchange or sorbent material utilized | 5 |
20090030243 | POLYOL REFINING - The subject of the present invention is a method for refining of polyols, preferably glycerol, by means of monodispersed ion exchangers in a purification unit of ion exclusion process and a mixed bed. | 01-29-2009 |
20090198088 | PROCESS FOR THE PURIFICATION OF CRUDE GLYCERIN UTILIZING ION EXCLUSION CHROMATORGRAPHY AND GLYCERIN CONCENTRATION - A process for the purification of crude glycerin utilizing ion exclusion chromatography fractionation, and one or more dewatering steps under moderate temperatures and pressures. | 08-06-2009 |
20110004031 | GLYCERIN PURIFICATION - Techniques are generally described herein for the purification of glycerin. Embodiments include, but are not limited to, methods, systems, and articles of manufacture. Other embodiments may also be disclosed and claimed. Some techniques described herein include adding methyl alcohol and acid to crude glycerin to form a solution, filtering the solution to remove at least one salt of the acid from the solution, separating the solution into a first layer of free fatty acids and a second layer of at least partially purified glycerin, and distilling off the methyl alcohol from second layer of the solution. The second layer may then undergo one or more additional operations including neutralizing, further filtering to remove an excess of the neutralizing agent, passing through a plurality of ion-exchange columns, deodorizing, and dewatering. | 01-06-2011 |
20120088941 | POLYOL REFINING - The subject of the present invention is a method for refining of polyols, preferably glycerol, by means of monodispersed ion exchangers in a purification unit of ion exclusion process and a mixed bed. | 04-12-2012 |
20140114095 | GLYCERIN PURIFICATION METHOD - This invention provides a cost-effective method for removing impurities from waste glycerin generated in the process of biodiesel production, so as to prevent a supercritical water reaction tube from clogging, when synthesizing acrolein by allowing supercritical water and acid to react with glycerin. The method for purification of glycerin of the invention comprises steps of: heating glycerin containing alkali metal, alcohol, organic fatty acid, and water under reduced pressure, so as to remove alcohol and water; adding sulfuric acid to glycerin from which alcohol and water have been removed, so as to neutralize glycerin; subjecting neutralized glycerin to centrifugation, so as to separate and remove a sulfate of alkali metal and organic fatty acid; adding a sulfate of alkaline earth metal to glycerin collected via centrifugation; and subjecting a mixture of glycerin and a sulfate of alkaline earth metal to centrifugation, so as to separate and remove a sulfate of alkali metal and an alkaline earth metal salt of organic fatty acid. | 04-24-2014 |
568872000 | Ion exchange or sorbent material utilized | 5 |
20100105966 | ETHYLENE GLYCOL REMOVAL OF RESIDUAL GLYCOL IMPURITIES - A process includes receiving a process stream including at least about 80.0% by weight propylene glycol, and contacting the process stream with an absorbent material to produce a product stream. The absorbent material is configured to preferentially absorb ethylene glycol relative to propylene glycol. | 04-29-2010 |
20110152583 | Purification Of Biologically-Produced 1,3-Propanediol - A process for purifying 1,3-propanediol from the fermentation broth of a cultured | 06-23-2011 |
20110257441 | METHOD FOR PURIFYING AN ALCOHOL FROM A FERMENTATION BROTH USING A FALLING FILM, A WIPED FILM, A THIN FILM OR A SHORT PATH EVAPORATOR - Method for purifying an alcohol from a fermentation broth comprising adding a heavy solvent, evaporating the alcohol to be purified, and mechanically drawing out of the crystallized salts by heavy solvent flow and scrapping on a falling film evaporator, a wiped film evaporator, a thin film evaporator or a short path evaporator. | 10-20-2011 |
20140256991 | METHODS FOR PRODUCING BIODERIVED PROPYLENE GLYCOL - In the process of distilling a polyol product mixture including one or both of a biobased propylene glycol and a biobased ethylene glycol from the reaction of hydrogen with a biobased feed, it has been discovered that undesirable epoxides can form, and the present invention provides means for guarding against their formation, for removing epoxides which do form by particular methods of distilling, and for removing the epoxides from a finished, otherwise commercially acceptable biobased glycol product. | 09-11-2014 |
20160185694 | ALCOHOL PRODUCTION METHOD - An alcohol production method whereby high quality alcohol can be easily and effectively produced includes a step in which an alcohol solution, which contains sugar and/or sugar alcohol as an impurity and an alcohol other than sugar alcohol as a main component, has the sugar and/or sugar alcohol adsorptively removed therefrom by contacting the alcohol solution with one type or a mixture of two or more types of adsorbents selected from zeolite, an ion-exchange resin, silica alumina, and alumina. | 06-30-2016 |