| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 568606000 | Plural oxyalkylene groups bonded directly to each other | 65 |
| 568607000 | Benzene ring containing | 3 |
| 20100292515 | Purification method of high-molecular-weight polyethylene glycol compound - An impurity derived from a high-molecular-weight polyethylene glycol compound is removed from a high-molecular-weight polyethylene glycol compound whose total average number of moles of ethylene oxide units added in the molecule is 220 to 4500. In a state where the high-molecular-weight polyethylene glycol compound is dissolved in at least one of water and an organic solvent selected from aromatic hydrocarbon solvents having 8 or less carbon atoms in total and ester compound solvents having 5 or less carbon atoms in total, the water and the organic solvent are mixed. The resulting mixture was separated into an organic layer and an aqueous layer, and the organic layer is separated from the aqueous layer. | 11-18-2010 |
| 568608000 | Ether oxygen bonded directly to a benzene ring | 2 |
| 568609000 | Plural rings containing | 2 |
| 20120078017 | METHODS FOR PREVENTING AND TREATING RADIATION-INDUCED EPITHELIAL DISORDERS - The present invention provides methods of protecting irradiated eukaryotic cells such as irradiated mammalian epithelial cells, from the deleterious effect of microbial pathogens such as | 03-29-2012 |
| 20130102812 | WATER-SOLUBLE FLUORESCENT FULLERENE DERIVATIVE, AND PREPARATION METHOD THEREOF - The present invention relates to a water-soluble fluorescent fullerene derivative and a preparation method thereof, and more particularly to a method of preparing a fullerene derivative having excellent fluorescence in a simple manner by mixing fullerene and a ligand containing a terminal hydroxyl group in a first solvent and reacting the mixture in the presence of a catalyst, and to a water-soluble fluorescent fullerene derivative prepared by the method. | 04-25-2013 |
| 568613000 | Acyclic | 62 |
| 20080207955 | Method for the Production of Polyoxymethylene Dialkyl Ethers from Trioxan and Dialkylethers - A process for preparing polyoxymethylene dialkyl ethers of the formula | 08-28-2008 |
| 20100056830 | METHOD FOR SYNTHESIZING POLYOXYMETHYLENE DIMETHYL ETHERS BY IONIC LIQUID CATALYSIS - The present invention discloses a method for synthesizing polyoxymethylene dimethyl ethers by ionic liquid catalysis. The method comprises synthesizing polyoxymethylene dimethyl ethers by using a functional acidic ionic liquid as catalyst and using methylal and trioxymethylene as reactant under a relative mild reaction condition. The invention has advantages of high catalyst activity and reaction conversion, simple reaction process, high operationability and controllability, as well as good product distribution and high raw material utilization ratio. | 03-04-2010 |
| 20100063327 | PROCESS FOR REDUCING SIDE-REACTIONS DURING ALKYLENE GLYCOL AND POLY-ALKYLENE GLYCOL MANUFACTURING - This invention relates to a process of producing one or more of an alkylene glycol or poly-alkylene glycol by the reaction of an alkylene oxide and water whereby reduced levels of undesired by products such as carbonyl compounds, ultraviolet light absorbing compounds and various metal species are produced. | 03-11-2010 |
| 20100099921 | Method for Producing Alkylene Glycol Diethers - The invention relates to a method for producing alkylene glycol diethers by reacting a linear or cyclic ether with an alkylene oxide in the presence of a Lewis acid. The method is characterized in that the Lewis acid is a mixture of 1 part by weight of HBF | 04-22-2010 |
| 20100280277 | PROCESS FOR MAKING ETHERS FROM ALKOXIDE ANIONS OR PRECURSORS OF ALKOXIDE ANIONS - Improved methods for making ethers. In particular, an alkoxide can be more effectively converted into an ether by reaction with a hydrocarbyl halide in the presence of a substantial excess of a hygroscopic base such as NaOH. When present in such an unconventional excess, the base serves multiple functions. As a consequence, the alkoxide is extensively converted to the desired ether rapidly at excellent yields. The reaction environment also aids later product isolation. The use of the NaOH rather than Na metal allows the ether product to be separated from water soluble impurities such as salt products, left over base, left over hydrocarbyl halide, formates, etc. by liquid-liquid extraction among aqueous and organic phases. | 11-04-2010 |
| 20120215030 | POLYMERS BASED ON GLYCEROL CARBONATE - The present invention relates to a polymer and the associated polymerization process, and to the use of the polymers according to the invention for example as foam suppressant, for the dispersion of solids or as surfactant for washing or cleaning purposes. The polymer is prepared by polymerization of
| 08-23-2012 |
| 20140114093 | SYSTEM AND METHOD FOR CONTINUOUSLY PRODUCING POLYOXYMETHYLENE DIALKYL ETHERS - A reaction system and method for producing polyoxymethylene dialkyl ethers (RO(CH | 04-24-2014 |
| 20140364651 | METHOD FOR SYNTHESIZING POLYOXYMETHYLENE DIMETHYL ETHERS - The present invention relates to the field of chemical engineering and technology, in particular relates to the sub-field of synthesis of high quality alternative liquid engine fuel from non-petroleum based feedstock, more particularly relates to a method for regulating and optimizing the synthetic process of polyoxymethylene dimethyl ethers utilizing chemical thermodynamic principle. The process of the present invention Is achieved by conditions wherein the initial temperature of reaction is controlled at 100-120° C., then the temperature is reduced to 50-70° C. by successive stepwise cooling or programmed cooling,, the reaction pressure is controlled at 0.1-4.0 MPa, and the molar ratio of paraformaldehyde or trioxane metered in formaldehyde units to methylal in the feedstock is 1.5:1-8:1. In the process, higher overall yield of the target product can be achieved in the same reaction time, and selectivity of products with higher degree of polymerization of methoxy groups can be increased. | 12-11-2014 |
| 568614000 | Halogen containing | 4 |
| 20110077432 | METHOD FOR PREPARING MULTI-ARM POLY(ETHYLENE GLYCOL) CHLORIDES - A method for preparing multi-arm poly(ethylene glycol) (PEG) chlorides from multi-arm PEG polyols is described. The method comprises a process, wherein the multi-arm PEG polyol is reacted with thionyl chloride to form the multi-arm PEG chloride. | 03-31-2011 |
| 568615000 | Fluorine | 3 |
| 20080306308 | PROCESS FOR PREPARING FLUORINE-CONTAINING ALKOXYALKANE - A process for preparing a fluorine-containing alkoxyalkane represented by the general formula (1) R | 12-11-2008 |
| 20120259143 | FLUOROALKYLALKOXYLATES - Disclosed is a fluorinated alkylalkoxylate compound of Formula 1, | 10-11-2012 |
| 20160075625 | 1,2-BIS(2,2-DIFLUOROETHOXY)ETHANE AND MANUFACTURING METHOD THEREOF - 1,2-Bis(2,2-difluoroethoxy)ethane which can be used as electrolyte solution of a non-aqueous electrolyte secondary battery is provided. Used are 1,2-Bis(2,2-difluoroethoxy)ethane represented by the following formula (1): | 03-17-2016 |
| 568616000 | Carbon to carbon unsaturation containing | 4 |
| 20100217050 | Branched Acetylene-Containing Poly(Alkylene Oxides, Oxyethylated Polyols or Olefinic Alcohols) - The invention provides water-soluble compounds that include a polymer and at least one terminal azide or acetylene moiety. Also provided are highly efficient methods for the selective modification of proteins with PEG derivatives, which involves the selective incorporation of non-genetically encoded amino acids, e.g., those amino acids containing an azide or acetylene moiety, into proteins in response to a selector codon and the subsequent modification of those amino acids with a suitably reactive PEG derivative. | 08-26-2010 |
| 20120296125 | ALKOXYLATION PRODUCTS AND PROCESS FOR PREPARING THEM BY MEANS OF DMC CATALYSTS - Novel alkoxylation products containing lateral hydroxyl groups or bearing lateral C—C double bonds and a process for preparing them by means of an alkoxylation reaction of halogenated alkylene oxides using double metal cyanide (DMC) catalysts and subsequent elimination of chlorine. | 11-22-2012 |
| 20130197275 | ALKOXYLATES OF OPTIONALLY HYDROGENATED FARNESOLS AND USE THEREOF - The present invention relates to new types of specifically alkoxylated farnesol alkoxylates based on farnesol or at least partially hydrogenated farnesol, directly linked to a propylene oxide block; processes for the preparation of these alkoxylates and the use thereof in washing, rinsing, cleaning or finishing compositions, cosmetic compositions, compositions for papermaking, agrochemical compositions, fuel additives and solubilization auxiliaries in aqueous liquid systems. | 08-01-2013 |
| 20130197276 | ALKOXYLATES OF HYDROGENATED FARNESOLS AND USE THEREOF - The present invention relates to new types of farnesol alkoxylates, based on at least partially hydrogenated farnesol; processes for the preparation of these alkoxylates and the use thereof in washing, rinsing, cleaning or finishing compositions, cosmetic compositions, compositions for papermaking, fuel additives and solubilization auxiliaries in aqueous liquid systems. | 08-01-2013 |
| 568617000 | Polytetramethylene glycols | 2 |
| 20140213828 | POLYMER RECOVERY PROCESS IN THE FILTRATION OF POLYETHER POLYOLS - A filtration method is disclosed for recovering purified polyether polyol comprising the steps of providing an aqueous solution of a polyether polyol containing an alkali metal catalyst residual formed from a transesterification process utilizing an alkali metal catalyst, contacting the aqueous solution with a stoichiometric excess of magnesium sulfate, magnesium sulfite or a combination thereof to form a second aqueous solution, wherein said stoichiometric excess is based on the amount of said alkali metal catalyst residual. Water is removed from the second aqueous solution at a temperature above a set limit of said polyether polyol to produce a dehydrated slurry containing a polyether polyol phase substantially free of residual alkali metal and a precipitated solid phase comprising sulfate and/or sulfite salts of the alkali metal catalyst, magnesium hydroxide, and excess magnesium sulfate and/or sulfite, wherein the particle size distribution of said precipitated solid phase is controlled to minimize the amount of particles therein that are smaller than 3 microns. The dehydrated slurry is then passed through a filtration system to separate the polyether polyol phase from the precipitated solid phase. | 07-31-2014 |
| 20140378712 | ALKANOLYSIS PROCESS - The present invention provides an improved process for converting a diester of polyether polyol, e.g., PTMEA, to the corresponding dihydroxy product, e.g., polytetramethylene ether glycol (PTMEG) continuously in a reaction zone, such as, for example, a reactive distillation system, for achieving virtually complete conversion of PTMEA to PTMEG, and recovery of PTMEG free of unreacted or unconverted PTMEA and alkanol ester by-product. | 12-25-2014 |
| 568618000 | Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal) | 27 |
| 20080221368 | Process for Preparing Polyoxymethylene Dimethyl Ethers from Methanol and Formaldehyde - A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDME | 09-11-2008 |
| 20100280278 | PROCESS FOR THE ALKOXYLATION OF ALCOHOLS - Processes for the alkoxylation of alcohols using alkylene epoxides in the presence of boron based catalysts are provided. | 11-04-2010 |
| 20100280279 | ALKYL ALKOXYLATES CONTAINING UNIQUE END GROUPS - Described is a process for the alkoxylation of alcohols with I, Cl, or CH | 11-04-2010 |
| 20110319669 | BRANCHED SECONDARY ALCOHOL ALKOXYLATE SURFACTANTS AND PROCESS TO MAKE THEM - Provided are alkoxylates of the formula I: | 12-29-2011 |
| 20120004470 | PROCESS FOR PRODUCING ETHER COMPOUND - The present invention relates to a process for producing an ether compound in a simplified, efficient manner, including the step of reacting a hydroxyl group-containing compound with an epoxy compound in the presence of an oxide of a metal of Group 4 of the Periodic Table on which a sulfate ion is supported, wherein a sum of a diffraction intensity of a (111) crystal lattice plane and a diffraction intensity of a (−111) crystal lattice place of the metal oxide is 2000 cps or larger as measured by subjecting the metal oxide to powder X-ray diffraction analysis. | 01-05-2012 |
| 20120123170 | METHOD FOR PRODUCING NONIONIC SURFACTANT - The present invention relates to the method for producing a nonionic surfactant, including the step (I) of reacting alcohol having a water content of not more than 0.1% by mass with ethylene oxide to obtain ethylene oxide-adduct, the step (II) of reacting the ethylene oxide-adduct with propylene oxide to obtain the alkylene oxide-adduct having a content of remaining propylene oxide of not more than 1000 mg/kg, and the step (III) of reacting the alkylene oxide-adduct with ethylene oxide to obtain the nonionic surfactant having each content of remaining ethylene oxide and remaining propylene oxide of not more than 5 mg/kg. | 05-17-2012 |
| 20130231508 | BRANCHED SECONDARY ALCOHOL ALKOXYLATE SURFACTANTS AND PROCESS TO MAKE THEM - Provided are alkoxylates of the formula I: Also provided is a process for making alkoxylates of formula I. The process provides alkoxylates that exhibit narrow molecular weight distribution and low amounts of residual unreacted alcohol. The alkoxylates have utility in a variety of applications, such as use as surfactants. | 09-05-2013 |
| 20150329669 | PROCESS FOR PREPARING A MACROMONOMER - The present invention relates to a process for preparing hydrophobically associating macromonomers M and to the novel macromonomers prepared by means of the process according to the invention. The macromonomers M comprise a copolymerizable, ethylenically unsaturated group and a polyether structure in block form, the latter consisting of a polyethyleneoxy block and a hydrophobic polyalkyleneoxy block consisting of alkyleneoxy units having at least 4 carbon atoms. Optionally, the macromonomers M may have a terminal polyethyleneoxy block. The macromonomers prepared by the process according to the invention are suitable for reaction with further monomers, especially with acrylamide, to give a water-soluble, hydrophobically associating copolymer. | 11-19-2015 |
| 568619000 | From polyhydroxy containing compound | 19 |
| 20090069606 | Method of making alkoxylates - Ethoxylates and other alkoxylates are made in an efficient manner by reacting an organic bromide with a diol in the presence of a metal oxide. An integrated process of bromide formation, alkoxylate synthesis, metal oxide regeneration, and bromine recycling is also provided. | 03-12-2009 |
| 20100240929 | PROCESS FOR PREPARING POLYMERS OF POLYHYDRIC ALCOHOLS - The present invention relates to a process for accelerated preparation of linear polymers of polyhydric alcohols using microwave irradiation as the heat element in the presence of specified catalysts. | 09-23-2010 |
| 20110077433 | POLYTRIMETHYLENE ETHER GLYCOL OR COPOLYMERS THEREOF HAVING IMPROVED COLOR AND PROCESSES FOR THEIR PREPARATION - Processes for reducing the color of polytrimethylene ether glycol or copolymers thereof are provided. The processes include polycondensing diols in the presence of an acid catalyst and adding base continuously over a period of the polycondensation reaction. The invention also relates to the polytrimethylene ether glycol thereof produced by these processes. | 03-31-2011 |
| 20110112331 | Method for phase separation of polytrimethylene ether glycol in salt solution - Processes are provided for manufacturing polytrimethylene ether glycol, in which water is added to the product polymer to facilitate phase separation. | 05-12-2011 |
| 20110118508 | PROCESS OF PRODUCING POLYGLYCEROL FROM CRUDE GLYCEROL - The present invention relates to a process for accelerated preparation of polyglycerol from crude glycerol using microwave irradiation as the heat element in the presence of soap as the catalyst. The process includes the steps of (a) heating the crude glycerol that contain soap to an elevated temperature for a certain reaction time by using a microwave technology, (b) acidifying the crude polyglycerol with mineral acid at a specific temperature and centrifuging acidified crude product obtained from step (b) at a specific temperature for a certain duration of time. | 05-19-2011 |
| 20110251437 | POLYGLYCEROL MONOETHER AND PROCESS FOR PRODUCING THE SAME - A polyglycerol monoether is represented by FOLLOWING General Formula (1): | 10-13-2011 |
| 20120078018 | Process For Neutralizing An Unneutralised Polyether Polyol - A process for neutralizing an unneutralised polyether polyol prepared using a base catalyst according to the invention comprises the steps of addition of a polyprotic acid to the unneutralised polyether polyol, the highest pKa-value of the polyprotic acid being less than 3.5, wherein, per kilogram of unneutralised polyether polyol, “A” moles of said polyprotic acid are added to the unneutralised polyether polyol, such that | 03-29-2012 |
| 20120215031 | Process for making polyglycerol ethers of fatty alcohols - Disclosed are processes relating to the production of polyglycerol ethers of fatty alcohols, in particular, one step process using fatty alcohol and glycerine to synthesize polyglycerides of fatty alcohols will provide a 100% renewable surfactant that is cost effective efficient and CMR free. The synthetic methods mentioned in prior art uses hazardous chemicals as glycidyl ethers, epichlorohydrin that are listed as CMR and known carcinogens and hazardous to handle. | 08-23-2012 |
| 20120277478 | PROCESSES FOR PREPARING POLYTRIMETHYLENE ETHER GLYCOL - Provided are processes for preparing low molecular weight polytrimethylene ether glycol by acid catalyzed polycondensation, neutralization, removal of unreacted monomer, and contact with filter aid. The processes can avoid hydrolysis and yet provide product substantially free of catalyst derived end groups. | 11-01-2012 |
| 20130289314 | METHODS FOR MAKING POLYGLYCEROL - Methods are provided for making polyglycerol. The methods include heating glycerol at reduced pressure in the absence of a glyceride and in the presence of a catalytic amount of an acid selected from the group consisting of sulfuric acid, triflic acid, hydrochloric acid, hexafluorophosphoric acid, tetrafluoroboric acid and mixtures thereof. | 10-31-2013 |
| 20130331613 | METHOD FOR PREPARING A GLYCOL MONO-TERTIARY-BUTYLETHER COMPOUND - Disclosed is a method of preparing a glycol mono-tertiary-butyl ether compound using a C | 12-12-2013 |
| 20160075624 | PROCESS FOR PREPARING AND SEPARATING MONODISPERSE POLYETHYLENE GLYCOL - A process for preparing and separating a monodisperse polyethylene glycol, including: dissolving a starting material of polyethylene glycol into an organic solvent for reaction with a compound represented by general formula I under catalytic action of an alkaline substance, to prepare a mixture of derivatives of polyethylene glycol having different polarities; separating the mixture of derivatives of polyethylene glycol by means of silica gel column chromatography, to obtain a monodisperse derivative of polyethylene glycol; and hydrolyzing the derivative of polyethylene glycol to obtain a monodisperse polyethylene glycol. The starting material is industrially prepared polyethylene glycol with a wide source and low cost, which provides a guarantee for popularization and application of a monodisperse polyethylene glycol product. | 03-17-2016 |
| 568620000 | And cyclic ether | 7 |
| 20090292147 | PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYETHER ALCOHOLS - The invention relates to a process for the continuous preparation of polyether alcohols by reacting H-functional initiators with alkylene oxides using basic catalysts, wherein at least one initiator is metered with at least one alkylene oxide continuously into a back-mixing reactor and the reaction product is removed continuously from the back-mixing reactor. | 11-26-2009 |
| 20110077434 | PROCESS FOR PRODUCING POLYOXYALKYLENE ALKYL ETHERS - In the present invention, when polyoxyalkylene alkyl ethers are produced by adding propylene oxide to a linear alcohol in the presence of an alkali catalyst, the proportion of the alkali catalyst and the proportion of propylene oxide, per mole of active hydrogen of the linear alcohol, are in specific ranges respectively and the temperature in the addition between the linear alcohol and propylene oxide is in a specific range. | 03-31-2011 |
| 20130345476 | PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT IMPACT POLYETHERS - This invention relates to an improved continuous process for the production of low molecular weight polyoxyalkylene polyether polyols. These polyoxyalkylene polyether polyols have a hydroxyl content of from about 3.4 to about 12.1% by weight, and may also be characterized as having an OH number of from about 112 to about 400. The process comprises establishing oxyalkylation conditions in a continuous reactor in the presence of a DMC catalyst; continuously introducing alkylene oxide and a low molecular weight starter into the continuous reactor; recovering a partially oxyalkylated polyether polyol from the reactor; and allowing the recovered partially oxyalkylated polyether polyol to further reactor until the unreacted alkylene oxide content of the mixture is reduced to 0.001% or less by weight. | 12-26-2013 |
| 20140142344 | PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT POLYETHER POLYOLS - The invention relates to a process for the preparation of polyether polyols with equivalent molecular weights of from 8,000 to 20,000 g/mol from one or more H-functional starter compounds and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterized in that the alkylene oxides are metered into the reactor in the course of from 15 to 23 h. | 05-22-2014 |
| 20140275632 | CATALYST FOR THE PRODUCTION OF POLYOLS HAVING LOWER AMOUNTS OF HIGH MOLECULAR WEIGHT TAILS - This invention relates to novel double metal cyanide catalysts and to a process for the production of these double metal cyanide catalysts. These DMC catalysts can be used to prepare polyoxyalkylene polyols which have low amounts of high molecular weight tail compared polyoxyalkylene polyols prepared from DMC catalysts of the prior art. | 09-18-2014 |
| 20140275633 | CONTINUOUS PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT POLYETHERS WITH A DMC CATALYST - Low molecular weight polyoxyalkylene polyether polyols having a hydroxyl content of from about 3.4 to about 12.1% by weight, and OH numbers of from about 112 to about 400 are produced by a continuous process using a DMC catalyst. In the process of the present invention, oxyalkylation conditions are established in a continuous reactor in the presence of a DMC catalyst; alkylene oxide and a low molecular weight starter are continuously introduced into the continuous reactor; a partially oxyalkylated polyether polyol is recovered from the reactor; and the recovered partially oxyalkylated polyether polyol is allowed to further reactor until the unreacted alkylene oxide content of the mixture is reduced to 0.001% or less by weight. The alkoxylation of the present invention must be carried out a pressure sufficiently high to prevent deactivation of the DMC catalyst. Pressures of from 45 to 55 psia are preferred. | 09-18-2014 |
| 20160068631 | PROCESS FOR PREPARING HIGHLY ACTIVE DOUBLE METAL CYANIDE CATALYSTS AND THEIR USE IN THE SYNTHESIS OF POLYETHER POLYOLS - The present invention relates to a double metal cyanide (DMC) complex catalyst with an improved catalytic activity useful for epoxide polymerization. It also relates to polyether polyols prepared by a polymerization reaction using said DMC catalyst. | 03-10-2016 |
| 568621000 | Purification or recovery | 7 |
| 20100105959 | PROCESS FOR THE REMOVING POLY(PROPYLENE OXIDE) FROM PROPYLENE OXIDE BY MEMBRANE SEPARATION - The invention relates to a process for removing poly(propylene oxide) from propylene oxide by membrane separation, wherein a membrane having an average pore size of from 0 to 5 nm is used. In said process, a liquid feed comprising propylene oxide and poly(propylene oxide) may be separated by the membrane into a permeate comprising propylene oxide and either no poly(propylene oxide) or poly(propylene oxide) at a concentration which is lower than the poly(propylene oxide) concentration in the feed, and a retentate comprising propylene oxide and poly(propylene oxide) at a concentration which is higher than the poly(propylene oxide) concentration in the feed. | 04-29-2010 |
| 20140364652 | METHOD FOR REFINING POLYOXYMETHYLENE DIALKYL ETHERS BY CATALYTIC HYDROGENATION USING A SLURRY BED - The present invention relates to a method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a slurry bed, wherein, using a slurry bed reactor of refining by hydrogenation, an equilibrium system of products containing polyoxymethylene dialkyl ethers is refined by catalytic hydrogenation, so as to remove formaldehyde contained therein. The refining method by hydrogenation described in the present invention is able to remarkably increase the extracting rate of polyoxymethylene dialkyl ethers, and the polyoxymethylene dialkyl ethers obtained after subsequent rectification have purity greater than 99.5%, yield greater than 97% and atom utilization ratio close to 100%. | 12-11-2014 |
| 20140364653 | METHOD FOR REFINING POLYOXYMETHYLENE DIALKYL ETHERS BY CATALYTIC HYDROGENATION USING A FIXED BED - The present invention relates to a method for refining polyoxymethylene dialkyl ethers by catalytic hydrogenation using a fixed bed, wherein, using a fixed bed reactor of refining by hydrogenation, an equilibrium system of products containing polyoxymethylene dialkyl ethers is refined by catalytic hydrogenation, so as to remove formaldehyde contained therein. The refining method by hydrogenation described in the present invention is able to remarkably increase the extracting rate of polyoxymethylene dialkyl ether products with various degrees of polymerization, and the polyoxymethylene dialkyl ethers obtained after subsequent rectification have purity greater than 99.5%, yield greater than 97% and atom utilization ratio close to 100%. | 12-11-2014 |
| 20150133696 | Process for the Production of Polyether Polyols - A method to provide polyether polyols comprises the steps of •providing a crude polyether polyol mixture comprising polyether polyol and a base catalyst; •neutralizing said base catalyst; •removing, in a first dehydration step, at least part of the water from the neutralized polyether polyol; •redissolving at least part of the salt crystals obtained by removal of at least part of the water; •removing, in a second dehydration step, at least part of the water from the neutralized polyether polyol mixture, thereby providing salt crystals; •removing the salt crystals from the neutralized polyether polyol, thereby providing the polyether polyol mixture. | 05-14-2015 |
| 20150361018 | PROCESS FOR CLEANING CONTAMINATED FLUIDS - A process for cleaning contaminants from a contaminated fluid includes a) combining the contaminated fluid with a less polar miscible solvent to yield a reduced polarity contaminated fluid-solvent mixture in which the contaminants are insoluble, at least a portion of the contaminants precipitating from the reduced polarity contaminated fluid-solvent mixture to yield precipitated contaminants and the reduced polarity contaminated fluid-solvent mixture; b) separating at least a portion of the precipitated contaminants from the reduced polarity contaminated fluid-solvent mixture; and c) separating at least a portion of the fluid from the reduced polarity contaminated fluid-solvent mixture to yield cleaned fluid. | 12-17-2015 |
| 20160102035 | PROCESS FOR THE SEPARATION OF AN ALKYLENE GLYCOL - The invention provides a process for the recovery of an alkylene glycol from an aqueous stream comprising the alkylene glycol and the corresponding dialkylene glycol, said process comprising the steps of providing the aqueous stream comprising the alkylene glycol and the corresponding dialkylene glycol, providing a first solvent stream, combining said aqueous stream comprising the alkylene glycol and the corresponding dialkylene glycol with said first solvent stream and recovering at least a portion of the alkylene glycol by liquid-liquid extraction, wherein said solvent comprises an amine. | 04-14-2016 |
| 20160159978 | SINGLE COLUMN STRIPPING AND DRYING PROCESS - Organic materials are stripped and dried in a single column having two contact zones. A stripping gas is introduced into an upper contact zone and flows through the organic material in that zone. A drying gas is introduced into a lower contact zone. The drying gas contacts the organic material in both the upper and lower contact zones, and is removed from the top of the column together with the stripping gas. This process permits very efficiently removal of volatile organic compounds as well as efficient drying, while requiring on low levels of the stripping and drying gasses. | 06-09-2016 |
| 568622000 | Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal) | 10 |
| 20110282103 | PROCESS FOR THE PREPARATION OF POLYGLYCERYL ETHER DERIVATIVES - The present invention relates to a process for producing polyglyceryl ether derivatives in which the polyglyceryl ether derivatives are produced from an alcohol (except for glycidol and glycerol) and glycidol in the presence of an aluminosilicate which is ion-exchanged with at least one cation selected from the group consisting of ammonium ions, alkali metal ions and alkali earth metal ions. In the process of the present invention, a removal step of the catalyst can be simplified, and the polyglyceryl ether derivatives can be produced in an economical and efficient manner. | 11-17-2011 |
| 568623000 | Polyhydroxy containing | 7 |
| 20110112332 | PROCESS FOR INCREASING THE COALESCENCE RATE FOR AMINE-INITIATED POLYETHERS - Disclosed is an improvement to a polyether preparation process that includes a coalescing step. Amine-initiated polyethers prepared using a mixed alkylene oxide feed tend to coalesce significantly more slowly than glycerin-initiated polyethers, particularly in processes that include a holding step and/or elevated temperature following an initial alkoxylation to form a pre-polymer. This improvement is to perform a remedial end-capping of the pre-polymer, which may include amine degradation products, using an alkylene oxide which contains at least (3) carbons, prior to the molecular weight-building alkoxylation with the mixed alkylene oxide feed. The rate and performance of coalescing thereafter may be substantially enhanced. | 05-12-2011 |
| 20130131389 | PROCESS FOR PREPARING POLYETHER ALCOHOLS - What is proposed is a process for preparing polyether alcohols by conversion of the following reactants: a) one or more alkylene oxides and optionally carbon dioxide and b) one or more H-functional starter substances, in the presence of a catalyst, to form a liquid reaction mixture, in a reaction unit ( | 05-23-2013 |
| 20130331614 | PROCESS AND REACTOR SYSTEM FOR THE PREPARATION OF POLYETHER POLYOLS - The present invention provides a process for the preparation of a polyether polyol, said process comprising polymerising one or more alkylene oxides in the presence of a multimetal cyanide complex catalyst and an initiator compound, wherein the process is carried out in a reactor vessel equipped with means for agitating its contents and the one or more alkylene oxides are supplied to an agitated mixture comprising the multimetal cyanide complex catalyst and the initiator via a feed inlet device, said feed inlet device comprising a sparger. The present invention also provides a reactor system for the preparation of polyols. | 12-12-2013 |
| 20140206907 | METHOD FOR PREVENTING PRESSURE BUILD UP IN A CATALYST SEPARATION SYSTEM - A method for preventing pressure build-up across a catalyst separation in a polyether polyol reactor comprising the steps of feeding reactants that comprise a monomer or co-monomers to be polymerized to form the polyether polyol into a continuous feed reactor, flowing the product stream through a catalyst separation system within the reactor, wherein the catalyst separation system is comprised of a plurality of filters, wherein each filter comprises an outer surface and an inner surface defined by a plurality of spaced-apart elements, and wherein the distance between the spaced-apart elements is smaller than the minor dimension of the suspended catalyst and recovering the filtered polyether polyol product and catalyst fines from the reactor outlet. | 07-24-2014 |
| 568624000 | Plural diverse oxyalkylene groups containing | 3 |
| 20120101308 | METHOD FOR THE PHOSPHINE-INITIALIZED PRODUCTION OF HYPERBRANCHED POLYOLS - A process for preparing hyperbranched polyols by reacting epoxy alcohols in the presence of phosphines. | 04-26-2012 |
| 20120215032 | POLYMERS BASED ON GLYCEROL CARBONATE AND AN ALCOHOL - The present invention relates to a polymer and the associated polymerization process, and to the use of the polymers according to the invention for example as foam suppressant, for the dispersion of solids or as surfactant for washing or cleaning purposes. The polymer is prepared by polymerization of | 08-23-2012 |
| 20120283483 | METHOD FOR CONTINUOUSLY PRODUCING LOW EQUIVALENT WEIGHT POLYOLS USING DOUBLE METAL CYANIDE CATALYSTS - Polyether polyols having equivalent weights of up to 500 are continuously prepared in the presence of a double metal cyanide catalyst. A first step of the reaction is performed at a temperature of at least 1500 C, while controlling the hydroxyl content and unreacted alkylene oxide content of the reaction mixture to within certain ranges. A portion of that reaction mixture is withdrawn and permitted to react non-isothermally to consume the unreacted alkylene oxide. This process is highly efficient, does not result in catalyst deactivation, as is commonly seen in previous processes, and does not produce a significant ultra high molecular weight tail. | 11-08-2012 |
| 568625000 | Plural diverse oxyalkylene groups containing | 2 |
| 20080249336 | HIGHLY BRANCHED PRIMARY ALCOHOL COMPOSITIONS, AND BIODEGRADABLE DETERGENTS MADE THEREFROM - There is provided a new branched primary alcohol composition and the sulfates thereof exhibiting good cold water detergency and biodegradability. The branched primary alcohol composition has an average number of branches per chain of at least 0.7, having at least 8 carbon atoms and contianing both methyl and ethyl branches. The primary alcohol composition may also contain less than 0.5 atom % of quaternary carbon atoms, and a significant number ethyl branches, terminal isopropyl branches, and branching at the C | 10-09-2008 |
| 20140303403 | CHEMICALLY MODIFIED SMALL MOLECULES - Methods of modifying the rate of systemic absorption of a drug administered to a subject by a pulmonary route, the method comprising covalently conjugating a hydrophilic polymer to a drug, wherein the drug has a half-life of elimination from the lung of less than about 180 minutes, to form a drug-polymer conjugate, wherein the drug-polymer conjugate has a net hydrophilic character and a weight average molecular weight of from about 50 to about 20,000 Daltons, and wherein the half-life of elimination from the lung of the drug-polymer conjugate is at least about 1.5-fold greater than the half-life of elimination from the lung of the drug, wherein the half-life of elimination from the lung is measured by bronchoalveolar lavage followed by assaying residual lung material. | 10-09-2014 |
