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| Number | Title | Issue Date |
| 8049044 | Remediation process and apparatus The invention relates to a process for remediation of a fluid contaminated with alkylene oxide, involving contacting the contaminated fluid with an aqueous absorbent to yield a fat absorbent having absorbed fluid, conferring intimate contact of fat absorbent and alk... | 11/01/2011 |
| 7825285 | Glycol separation and purification A process and an apparatus for the separation of a homogeneous catalyst solution from crude monoethylene glycol (MEG) and for purifying MEG is disclosed. The process comprises separating catalyst solution by evaporating crude MEG and feeding crude MEG to a rectifica... | 11/02/2010 |
| 7465840 | Process for the preparation of alkylene glycol A process for the preparation of an alkylene glycol, said process comprising reacting the corresponding alkylene carbonate with water and/or an alcohol in the presence of a metalate immobilised on a solid support, wherein the solid support is a strongly basic ion ex... | 12/16/2008 |
| 7462748 | Process for the preparation of alkylene glycol A process for the preparation of an alkylene glycol, said process comprising reacting the corresponding alkylene carbonate with water in the presence of a catalyst, wherein the catalyst comprises bicarbonate as active phase, immobilized on a solid support, having on... | 12/09/2008 |
| 7459588 | Method for producing unsaturated vicinal diol compound A method for producing an unsaturated vicinal diol compound represented by the formula (2): wherein R1, R2, R3, R4, R5 and R are the same or different and each independ... | 12/02/2008 |
| 7453014 | Process for the preparation of alkylene glycol The invention provides a process for the preparation of an alkaline glycol from an alkaline carbonate, wherein alkaline carbonate is hydrolyzed in the presence of catalyst in a baffled reactor. The baffled reactor has at least four compartments, the compartments are... | 11/18/2008 |
| 7385092 | Process for preparing alkanediols and alkanetriols having a vicinal diol group A process for preparing diols or triols made up of a1) reacting at least one monoolefin having 4 to 20 carbon atoms with hydrogen peroxide and formic acid in the presence of water to form a mixture or a2) reacting ... | 06/10/2008 |
| 7348444 | Process for the production of an olefin oxide A process for the production of an olefin oxide, which process comprises reacting a feed comprising an olefin and oxygen in the presence of a silver-containing catalyst, wherein before the catalyst has reached an advanced stage of ageing the reaction temperature is ... | 03/25/2008 |
| 7342141 | Process for the preparation of alkanediol The invention provides a process for the preparation of alkanediol comprising the steps: (i) contacting alkylene oxide with carbon dioxide in the presence of a carbonation catalyst to obtain a reaction mixture containing alkylene c... | 03/11/2008 |
| 7335799 | Hydroxyl compounds and compositions for cholesterol management and related uses The present invention relates to novel hydroxyl compounds, compositions comprising hydroxyl compounds, and methods useful for treating and preventing a variety of diseases and conditions such as, but not limited to aging, Alzheimer's Disease, cancer, cardiovascular ... | 02/26/2008 |
| 7145045 | Process for the preparation of alkanediol The invention relates to a process for the preparation of alkanediol, which process involves (a) contacting alkylene oxide with carbon dioxide in the presence of catalyst to obtain a first liquid reaction mixture containing cyclic carbonate, (b) optionally removing ... | 12/05/2006 |
| 6867337 | Process for producing glycerin A process for producing glycerin is comprised of the steps of: (1) contacting a fat with water at a temperature and pressure sufficient to produce hydrolyzed fat and a sweet water stream comprised of water, fat and glycerin; (2) introducing the sweet water stream in... | 03/15/2005 |
| 6835858 | Catalytic conversion of an organic carbonate The invention relates to a method for the catalytic conversion of organic carbonate to the corresponding alcohol, wherein the organic carbonate is contacted with alcohol and/or water in the presence of a zinc supported catalyst. ... | 12/28/2004 |
| 6740785 | Catalytic oxidation of organic substrates by transition metal complexes in organic solvent media expanded by supercritical or subcritical carbon dioxide Improved oxidation methods are provided wherein a reaction mixture comprising a substrate to be oxidized (e.g., phenols, alkenes) and an oxidation catalyst (typically dispersed in an organic solvent system) is supplemented with a compressed gas which expands the rea... | 05/25/2004 |
| 6720448 | Method of recovering chemical species by depolymerization of poly (ethylene terephthalate) and related use The present invention relates to a method of recovering a solution comprising the chemical species obtained by depolymerization of PET from a material containing poly(ethylene terephthalate) in the form of bottles, by making said material react, in the absence of wa... | 04/13/2004 |
| 6717001 | Process for operating the epoxidation of ethylene A process for the vapor phase oxidation of ethylene to ethylene oxide, which process involves reacting a reaction mixture having ethylene and oxygen in the presence of a supported highly selective silver-based catalyst by: operating at an initial operation phase whe... | 04/06/2004 |
| 6649792 | Method of chemical recycling of polyethylene terephthalate waste The proposed method of chemical recycling of polyethylene terephthalate waste to terephthalic acid and ethandiol is based on a continuous series of gradual steps, namely (a) separation of the polyethylene terephthalate component of the input material by i... | 11/18/2003 |
| 6555720 | Method and system for producing 1,4-butanediol A method and system for producing 1,4-butanediol (1,4-BG), and optionally additionally tetrahydrofuran (THF), that promotes more efficient usage of water (H2 O) is provided. In one aspect, the method is comprised of supplying at least one feed ... | 04/29/2003 |
| 6515036 | Method of decomposing a polyurethane A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea ... | 02/04/2003 |
| 6489373 | Method for decomposition and recovery of polyurethane resin The present invention provides a method of recovering a polyamine compound and/or a polyol compound useful for starting materials of polyurethane resin in an industrially advantageous manner by first dissolving the polyurethane resin such as polyurethane ... | 12/03/2002 |
| 6380419 | Process for simultaneous production of ethylene glycol and carbonate ester Ethylene glycol and a carbonate ester are simultaneously produced by reacting ethylene oxide and carbon dioxide to form ethylene carbonate, hydrolyzing of the solution containing the ethylene carbonate to obtain ethylene glycol, purifying ethylene glycol,... | 04/30/2002 |
| 6329558 | Method for producing alkylene glycol with a low carbonyl compound content In a process for isolating alkylene glycol having a low aldehyde content, in which a mixture comprising alkylene glycol is subjected to a final distillation, formic acid or a formate or a mixture of two or more formates or a mixture of formic acid and one... | 12/11/2001 |
| 6281394 | Method for producing vicinal diols or polyols A process for preparing vicinal diols or polyols from an organic reaction mixture containing formic esters of vicinal diols or polyols, in which water is added to the reaction mixture, without addition of bases, and the formic esters are hydrolyzed in a s... | 08/28/2001 |
| 6207850 | Process for co-production of dialkyl carbonate and alkanediol A method is provided for co-producing dialkyl carbonate and alkanediol by reacting alkylene carbonate with alkanol in the presence of a IIIA metal oxide catalyst, preferably alumina.... | 03/27/2001 |
| 6187972 | Process for producing an alkylene glycol A process for producing an alkylene glycol, which is a continuous process for producing an alkylene glycol comprising the following steps (1) to (4), wherein the hydrolysis step (2) is divided into a plurality of stages, and the hydrolysis is carried out ... | 02/13/2001 |
| 6162940 | Process for co-production of dialkyl carbonate and alkanediol A method is provided for co-producing dialkyl carbonate and alkanediol by reacting alkylene carbonate with alkanol in the presence of a complex salt catalyst having a formula Ax (My Oz), wherein A is an alkali metal or alk... | 12/19/2000 |
| 6080897 | Method for producing monoethylene glycol Disclosed is a method for producing monoethylene glycol, which is a method for producing ethylene glycol that comprises a carbonation step in which ethylene oxide is allowed to react with carbon dioxide in the presence of a carbonation catalyst thereby ef... | 06/27/2000 |
| 6023003 | Process and system for recovering glycol from glycol/brine streams A process and a system is disclosed for recovering glycol from glycol and brine mixtures produced from oil or natural gas wells that combines energy efficiency with a capability for handling salt and other solids contained in the mixture. The system compr... | 02/08/2000 |
| 5976202 | Reaction products of polyolefins with vinyl esters and their use as fuel and lubricant additives Reaction products of polyolefins having predominantly a terminal double bond and a number average molecular weight of from 250 to 10,000, which possess an aliphatic hydrocarbon skeleton which is straight-chain or carries C1 -C4 -alky... | 11/02/1999 |
| 5840553 | Process for preparing 1,2-propanediol derivative compounds A novel glycerol derivative, a process for preparing the same, and a process for preparing a triazole derivative. An optically active 2-arylglycerol derivative which is novel and useful as a synthetic intermediate of medicament is provided, and furthermor... | 11/24/1998 |
| 5808107 | Process for the preparation of hydroxy substituted gamma butyrolactones Preparation of 4-hydroxy substituted butyrolactones is described. A process for the preparation of 3-hydroxybutyrolactone, 1,2,4-trihydroxybutane and 3,4-dihydroxy acid methyl ester from malic acid is particularly described. The preparation of 4-hydroxyme... | 09/15/1998 |
| 5763691 | Ethylene glycol process The present invention relates to a process for producing ethylene glycol from ethylene oxide wherein ethylene oxide in a gas resulting from oxidation of ethylene is absorbed in a specific absorbing solution, is allowed to react with carbon dioxide, conver... | 06/09/1998 |
| 5672780 | Purification of ethylene glycol recovered from polyester resins There is described a process for removing dimethyl terephthalate contaminants from ethylene glycol. The process comprises distilling ethylene glycol in the presence of an ester exchange catalyst to cause reaction between ethylene glycol and dimethyl terep... | 09/30/1997 |
| 5635542 | Process for the production of hydroxyl-group-containing compounds from polyurethane polyurea and/or polyurea wastes The present invention relates to a process for the production of hydroxyl-group-containing compounds suitable for the polyisocyanate polyaddition process from polyurea and/or polyurethane polyurea wastes by treating polyurea and/or polyurethane polyurea w... | 06/03/1997 |
| 5583270 | Process for the preparation of 1,3-butylene glycol Disclosed are the improvements of a process for the preparation of 1,3-butylene glycol, in which the generation of by-products can be decreased, resulting in being capable of productiong 1,3-butylene glycol having high quality (e.g. an odorless, so-called... | 12/10/1996 |
| 5493063 | Process for optical resolution of 1,2-diol derivatives This invention provides a process for producing an optically active 1,2-diol derivative by optical resolution. The optically active 1,2-diol derivative of the formula (I) which is capable of utilizing as an intermediate of fungicidal optically-active azol... | 02/20/1996 |
| 5426217 | Process for the production of therephthalic acid A process for the production of terephthalic acid comprises subjecting polyalkylene terephthalate to hydrolysis using a ratio of water to polyalkylene terephthalate in the mixture prior to heating and carrying out the reaction under conditions such that, ... | 06/20/1995 |
| 5345004 | Process for the preparation of 1,3-butylene glycol Disclosed are the improvements of a process for the preparation of 1,3-butylene glycol, in which the generation of by-products can be decreased, resulting in being capable of producing 1,3-butylene glycol having high quality (e.g. an odorless, so-called "... | 09/06/1994 |
| 5266716 | Process for the splitting of polycarbonates A process for the continuous splitting of polycarbonates into dihydroxy compounds and carbonic acid esters is disclosed. Accordingly there are reacted in a distillation column a polycarbonate resin and a monohydroxy compound in the presence of a transeste... | 11/30/1993 |
| 5214182 | Process for cogeneration of ethylene glycol and dimethyl carbonate A process is disclosed for the cogeneration of ethylene glycol and dimethyl carbonate by reacting methanol and ethylene carbonate in the presence of a heterogeneous, phosphine-bound polymer catalyst. Dimethyl carbonate and ethylene glycol are generated in... | 05/25/1993 |
