| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 568864000 | Of compound containing a -COO- group | 21 |
| 20090259077 | PROCESS FOR THE PREPARATION OF ALKYLENE GLYCOL - The invention provides a process for the preparation of an alkylene glycol from an alkylene oxide. Alkylene oxide reacts with carbon dioxide in the presence of a carboxylation catalyst to provide alkylene carbonate; alkylene carbonate reacts with water in the presence of a hydrolysis catalyst to provide alkylene glycol. An initial charge of the carboxylation catalyst and an initial charge of the hydrolysis catalyst are added, the degradation and activity of the hydrolysis catalyst are monitored, and when the activity of the hydrolysis catalyst has fallen below a minimum level, an additional charge of the hydrolysis catalyst is added. | 10-15-2009 |
| 20100113842 | METHOD FOR PRODUCING ALCOHOL BY HYDROGENATING LACTONE AND CARBOXYLIC ACID ESTER IN LIQUID PHASE - Disclosed is a method for producing an alcohol from a lactone or a carboxylic acid ester, which enables to produce an alcohol from a lactone or a carboxylic acid ester under relatively mild conditions with high yield and high catalytic efficiency. This method also enables to produce an optically active alcohol from an optically active lactone or an optically active carboxylic acid ester. Specifically disclosed is a method for producing an alcohol by hydrogen reducing a lactone or a carboxylic acid ester in the presence of a catalyst containing ruthenium and a phosphine compound represented by the following general formula (1): | 05-06-2010 |
| 20100179356 | PROCESSES FOR PRODUCING ETHYLENE GLYCOL FROM OXALATE(S) - Provided are processes for producing ethylene glycol from oxalate(s), wherein two or more reaction zones in series are used, and oxalate feedstock is fed stagewise, or hydrogen feedstock and optionally a solvent are fed stagewise. The present processes achieve higher selectivity for the product and improved stability of catalysts. | 07-15-2010 |
| 20110124925 | PROCESS FOR PREPARING 1,6-HEXANEDIOL - The invention relates to a process for preparing 1,6-hexanediol, in which a hexanediol having a proportion by weight of nitrogen of less than 5 ppm is obtained, 1,6-hexanediol having a proportion by weight of nitrogen of less than 5 ppm and also the use of this 1,6-hexanediol for preparing polymers. | 05-26-2011 |
| 20110124926 | PROCESS FOR PREPARING DIOLS BY HYDROGENATING A CARBOXYLIC ACID-COMPRISING MIXTURE BY MEANS OF COBALT-COMPRISING CATALYSTS - The present invention relates to a process for preparing diols by hydrogenating a mixture comprising carboxylic acid, carboxylic anhydrides and/or carboxylic esters/lactones by means of a cobalt-comprising catalyst, wherein alkali metal and/or alkaline earth metal ions are added to the hydrogenation feed, excluding alkali metal and/or alkaline earth metal ions of mineral acids. | 05-26-2011 |
| 20120035399 | METHOD FOR PRODUCING 1,6-HEXANEDIOL BY HYDROGENATION OF OLIGO- AND POLYESTERS - The present invention relates to a process for hydrogenating oligo- and/or polyesters obtainable by esterifying a DCS with a diol or diol mixture, said hydrogenation being performed in the presence of a catalyst whose catalyst precursor comprises copper oxide, aluminum oxide and at least one oxide of lanthanum, of iron, of tungsten, of molybdenum, of titanium or of zirconium, and to a process for preparing 1,6-hexanediol by catalytically hydrogenating ester mixtures which comprise, as main components, oligo- and polyesters of adipic acid and 6-hydroxycaproic acid, and are obtained by esterifying DCS with diols, especially 1,6-hexanediol or diol mixtures. | 02-09-2012 |
| 20120046500 | METHOD FOR RECOVERY AND RECYCLE OF RUTHENIUM HOMOGENEOUS CATALYSTS - Disclosed is a process for the extractive recovery of a homogeneous ruthenium catalyst from the reaction product of the hydrogenation of glycolic acid, glycolate esters, and/or glycolic acid oligomers with an extractant comprising a hydrophobic solvent and an optional hydrophilic solvent. The ruthenium catalyst, which can include 1,1,1-tris(diaryl- or dialkylphosphinomethyl)alkane ligands, can be recovered from the hydrophobic extract phase by back extraction with a hydrophilic solvent and recycled to a process for the preparation of ethylene glycol by the hydrogenation of glycolic acid and glycolic acid derivatives. | 02-23-2012 |
| 20120316368 | PROCESS FOR MANUFACTURING SUCCINIC ACID - A process for the preparation of succinic acid comprising the steps of:
| 12-13-2012 |
| 20130123549 | HYDROGENATION CATALYSTS AND THE PREPARATION PROCESSES THEREOF - The present disclosure provides a hydrogenation catalyst, the preparation process thereof and the application thereof in the production of 1,4-butanediol by hydrogenating dialkyl maleate and/or dialkyl succinate. The catalyst comprises Cu—Al-A-B-G, wherein A comprises at least one of Zn. Mo and W, B comprises at least one of Ba, Mn, Mg, Ti, Ce and Zr. In the process for preparing said hydrogenation catalyst, a part of Cu and A are precipitated first and the rest of Cu, Al and B are precipitated successively. | 05-16-2013 |
| 20130123550 | COPPER HYDROGENATION CATALYST, ESPECIALLY FOR CONVERTING OXALATE TO ETHYLENE GLYCOL, METHOD OF PREPARING THE CATALYST AND APPLICATIONS THEREOF - A copper catalyst for producing ethylene glycol by hydrogenation of an oxalate. The catalyst includes a carrier, an additive, and an active component. The carrier is ceramic or metallic honeycomb. The additive is Al, Si, Ba, Ca, Ti, Zr, Fe, Zn, Mn, V, La, Ce, an oxide thereof, or a mixture thereof. The active component is copper, and the active component and the additive are coated on the carrier to form a coating layer. The additive accounts for 5-90 wt. % of the carrier, the active component accounts for 1-40 wt. % of the carrier, and the copper accounts for 5-50 wt. % of the coating layer. | 05-16-2013 |
| 20130184499 | PREPARATION OF CATALYST FOR SELECTIVE HYDROGENATION OF HYDROGENATABLE PRECURSORS - A reduced metallic catalyst or pre-activated catalyst is formed by contacting a precursor catalyst or a reduced metallic catalyst with a modifier solution in the presence of a source of hydrogen and heat treating the precursor catalyst or the reduced metallic catalyst at super-atmospheric pressure to obtain the reduced metallic catalyst from the precursor catalyst or the pre-activated catalyst from the reduced metallic catalyst. A method of hydrogenating a hydrogenatable precursor includes providing a reduced metallic catalyst or the pre-activated catalyst prepared with modifier buffer and contacting the reduced metallic catalyst or pre-activated catalyst with the hydrogenatable precursor in the presence of hydrogen and, optionally, in the presence of a modifier solution. | 07-18-2013 |
| 20130225875 | PRODUCTION OF 1,6-HEXANEDIOL - The present invention refers to a process for hydrogenation of caprolactone and/or its oligomers or polymers to 1,6-hexanediol. The process is performed in liquid phase at a pressure between 100 and 350 bar and is performed in the presence of a catalytically effective amount of at least one catalyst comprising Cu, Mn, Al, Cr, Zn, Ba and/or Zr. | 08-29-2013 |
| 20130253232 | METHODS FOR RECOVERY AND RECYCLE OF RUTHENIUM HOMOGENOUS CATALYSTS - Disclosed is a process for the extractive recovery of a homogeneous ruthenium catalyst from the reaction product of the hydrogenation of glycolic acid, glycolate esters, and/or glycolic acid oligomers with an extractant comprising a hydrophobic solvent and an optional hydrophilic solvent. The ruthenium catalyst, which can include 1,1,1-tris(diaryl- or dialkylphosphinomethyl)alkane ligands, can be recovered from the hydrophobic extract phase by back extraction with a hydrophilic solvent and recycled to a process for the preparation of ethylene glycol by the hydrogenation of glycolic acid and glycolic acid derivatives. | 09-26-2013 |
| 20130331617 | METHOD FOR PRODUCING ETHYLENE GLYCOL FROM OXALATE THROUGH THE FLUIDIZED BED CATALYTIC REACTION - A process for producing ethylene glycol includes contacting an oxalate with a fluidized bed catalyst under the following conditions: a reaction temperature of from about 170 to about 270° C., a weight space velocity of oxalate of from about 0.2 to about 7 hours | 12-12-2013 |
| 20130331618 | METHOD FOR IMPROVING THE QUALITY OF ETHYLENE GLYCOL PRODUCTS - A method for improving the quality of ethylene glycol products, which mainly solves the technical problem of low UV-light transmittance of the ethylene glycol products present in the prior art. The method successfully solves the problem by use of the technical solution wherein the ethylene glycol raw material and hydrogen are passed through a rotating packed bed reactor loaded with solid oxide catalyst at a temperature of about 20 to about 280 ° C., a pressure of about 0.1 to about 4.0 MPa, a space velocity of about 0.2 to about 100.0 hr | 12-12-2013 |
| 20130338406 | METHOD FOR THE PRODUCTION OF ETHYLENE GLYCOL - The present invention relates to a method for the production of ethylene glycol using a feedstock comprising an oxalate and a catalyst containing copper and/or a copper oxide, comprising contacting the feedstock with the catalyst in a reactor under the conditions of a temperature in the range from about 170 to about 270° C., a weight hourly space velocity of the oxalate in the range from about 0.2 to about 5 h | 12-19-2013 |
| 20150025279 | PROCESS FOR PRODUCING DODECANE-1,12-DIOL BY REDUCTION OF LAURYL LACTONE PRODUCED FROM THE OXIDATION OF CYCLODODECANONE - A process for synthesizing dodecane-1,12-diol, and by-products thereof, by the reduction of lauryl lactone produced from the oxidation of cyclododecanone. | 01-22-2015 |
| 20150368170 | METHOD FOR MANUFACTURING SUCCINIC ACID ESTERS - The invention pertains to a process for preparing a succinic acid ester comprising the steps of bringing an aqueous liquid comprising succinic acid, alcohol, and at least 5 wt. % of a dissolved chloride salt selected from magnesium chloride, calcium chloride, and zinc chloride, calculated on the weight of the liquid, to reaction conditions, thereby obtaining a succinic acid ester, and recovering the succinic acid ester and an aqueous solution comprising the dissolved chloride salt. It has been found that the process according to the invention shows a high yield and has a high reaction rate. Additionally, it has been found that the process makes it possible to carry out the separation of the succinic acid ester from the aqueous reaction medium in high yield. | 12-24-2015 |
| 20150375209 | METHODS OF CATALYTIC HYDROGENATION FOR ETHYLENE GLYCOL FORMATION - Embodiments described herein generally relate to hydrogenation catalysts, syntheses of hydrogenation catalysts, and apparatus and methods for hydrogenation. Methods for forming a hydrogenation catalyst may include mixing a silica generating precursor with a copper precursor and adding an ammonium salt to an end pH of between about 5 to about 9. Methods for hydrogenating an oxalate may include forming a reaction mixture by flowing a hydrogenation catalyst to a reactor, flowing a hydrogen source to the reactor, and flowing an oxalate to the reactor, wherein the hydrogenation catalyst has a particle size between about 10 nm to about 40 nm. Methods may further include reacting the oxalate to form ethylene glycol. | 12-31-2015 |
| 20160144353 | PROCESS FOR THE REGENERATION OF A SUPPORTED NOBLE METAL CATALYST - A process for the regeneration of a supported noble metal catalyst comprising contacting the catalyst with a liquid aqueous system at a temperature in the range of from 90 to 160° C., wherein the pH of the aqueous system is outside the range of from 6 to 8, separating the aqueous system from catalyst; and subjecting the catalyst to calcination. | 05-26-2016 |
| 20160200646 | PRODUCTION OF 1,6-HEXANEDIOL FROM ADIPIC ACID | 07-14-2016 |
