| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 560204000 | Preparing esters by esterification or carbonylation | 26 |
| 20090264673 | METHOD FOR THE CONTINUOUS PRODUCTION OF UNSATURATED CARBOXYLIC ACID ANHYDRIDES - Process for continuously preparing unsaturated carboxylic anhydrides of the general formula I | 10-22-2009 |
| 20090264674 | SYSTEM AND METHOD FOR PRODUCING DIESTER - The system and method for producing diester are provided. The system includes a first distillation unit reacting a dicarboxylic acid with an alcohol to produce a first gaseous mixture, a first cooling unit connected to the first distillation unit and cooling the first gaseous mixture into a first liquid mixture, a second distillation unit connected to the first cooling unit and separating the first liquid mixture into a second gaseous mixture and a second liquid mixture, and a liquid-liquid extraction unit connected to the second distillation unit and separating the second liquid mixture into an aqueous-rich mixture and an organic-rich mixture from which the diester is obtained. | 10-22-2009 |
| 20100160671 | Processes for Producing an Oxalate by Coupling of CO - Provided are processes for producing an oxalate by coupling of CO in the presence of a nitrite, wherein two or more reaction zones in series are used, and at least a portion of the oxalate as reaction product is separated between the reaction zones, and/or the nitrite is fed stagewise. The processes described herein can effectively enhance the selectivity to the oxalate and the single-pass conversion of the feedstock. | 06-24-2010 |
| 20100274044 | Process for making menthyl glutarate - A process for making menthyl glutarate is disclosed. The process comprises reacting excess glutaric acid and menthol to produce a mixture comprising monomenthyl glutarate (MMG) and dimenthyl glutarate (DMG), wherein the weight ratio of glutaric acid to menthol is from 1.0 to 1.6 and the resulting mixture comprises from 60 to 70 wt. % of MMG and from 30 to 40 wt. % of DMG. | 10-28-2010 |
| 20100305354 | METHOD FOR THE SYNTHESIS OF DIACIDS OR DIESTERS FROM NATURAL FATTY ACIDS AND/OR ESTERS - The invention relates to a process for the synthesis of diacids or diesters of general formula ROOC—(CH | 12-02-2010 |
| 20110275851 | CARBOXYLIC ACID RECOVERY AND METHODS RELATED THERETO - A method of producing an alkyl ester of a carboxylic acid is provided, the method comprising: adding an alkanol and a mineral acid to a carboxylic acid salt to provide a carboxylic acid/alkanol solution and a precipitated mineral acid salt; separating the mineral acid salt from the carboxylic acid/alkanol solution; esterifying the carboxylic acid; and isolating an alkyl ester of the carboxylic acid. | 11-10-2011 |
| 20130035504 | Process For Preparing (Meth)Acrylic Esters Of Polyols - Provided are processes for the production of (meth)acrylic esters of polyols, in which for 80 mol % or more of the esters, all of the OH groups of the polyols are esterified. Certain processes relate to reaction of polyols with acrylic acid and/or methacrylic acid in the presence of acidic esterification catalysts and in the presence of polymerization inhibitors, operating with reaction mixtures which are liquid at reaction temperature and are free from nonreacting solvents and/or azeotropic entrainers, the resultant water of condensation being stripped from the gas phase of the reaction space, and the (meth)acrylic acid is metered in three or more portions. | 02-07-2013 |
| 20130079548 | PROCESS TO PRODUCE ALKENOIC ACID ESTERS FROM LACTONES - This invention relates to a process for the preparation of alkenoic acid esters comprising contacting a lactone with an alcohol and an acidic catalyst in the gas phase, characterised in that the process is carried out in the presence of at least 0.26 wt. % water, relative to the amount of the lactone. The process may result in a good production yield and selectivity with respect to the production of alkenoic acid esters and may also result in less formation of dialkylethers. The improved yield advantageously allows energy conservation. | 03-28-2013 |
| 20130079549 | PROCESS OF PRODUCING OXALATE BY CO GAS PHASE METHOD - A process of producing oxalate by CO gas phase method includes the following steps: a) introducing nitrite salt, water and an inorganic acid first into a reactor I to produce a NO containing effluent I; and separating the resultant effluent to obtain the effluent II of NO; b) introducing the effluent II of NO, a C | 03-28-2013 |
| 20130158286 | PROCESS TO PRODUCE ALKENOIC ACID ESTERS FROM LACTONES - This invention relates to a process for the preparation of alkenoic acid esters comprising contacting a lactone with an alcohol and an acidic heterogeneous catalyst, characterised in that the process is carried out in the presence of at least 20 ppm of an acid having a pKa of 5 or less, relative to the amount of the lactone. The presence of at least 20 ppm of an acid having a pKa of 5 or less may stabilise the catalyst during the reaction and may also be used for reactivating an acidic heterogeneous catalyst. The improved yield advantageously allows energy conservation. | 06-20-2013 |
| 20130172598 | METHOD FOR PRODUCING ETHYLENE GLYCOL DIMETHACRYLATE - The present invention relates to a process for preparing ethylene glycol dimethacrylate, which comprises transesterification of ethylene glycol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising lithium amide (LiNH | 07-04-2013 |
| 20130197265 | PROCESS OF PRODUCING OXALATE BY CO GAS PHASE METHOD - The present invention relates to a process of producing oxalate by CO gas phase method for chiefly solving the technical problem of the low utilization efficiency of nitrogen oxides or nitrous acid esters in the prior art. The present invention solves the problem in a better way by using the following steps including: a gas phase stream V containing NO and methanol and oxygen enter a supergravity rotating bed reactor II and are subjected to the oxidative esterification reaction to produce an effluent VI containing methyl nitrite; a methyl nitrite effluent VII obtained from separating said effluent VI together with a CO gas II enter a coupling reactor II and is contacted with a catalyst II to react to form a dimethyl oxalate effluent VIII and a gas phase effluent IX containing NO; the resultant dimethyl oxalate effluent VIII is separated to obtain a dimethyl oxalate product I; optionally, the gas phase effluent IX containing NO is returned to the step above so as to be mixed with the gas phase stream V containing NO for being recycled. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method. | 08-01-2013 |
| 20130289301 | COMPLEX OLIGOMERIC STRUCTURES - Mixture of triglycerides obtained from vegetable oils comprising one or more of the following oligomeric structures: R4—[O—C(O)—R1—C(O)—O—CH2—CH(OR2)—CH2]n—O—R3 wherein R1 is selected from C2-C22 alkylenes, R2 is selected from one or more of the following groups consisting of C6-C24 dicarboxylic acid residues and C6-C24 monocarboxylic acid residues, R3 is selected from one or more of the following groups consisting of H, C6-C24 dicarboxylic acid residues and C6-C24 monocarboxylic acid residues, R4 is an alkyl group, n is an integer greater than or equal to 2, said C6-C24 dicarboxylic acid residues of R2 and R3 being esterified with monoalcohols and said mixture of triglycerides having a Numerical Average Molecular Weight (Mn) of between 800 and 10.000 Da. | 10-31-2013 |
| 20140128631 | PROCESS FOR THE PREPARATION OF ALKANOIC ACID ESTERS IN A CARBONYLATION PROCESS USING PALLADIUM BIDENTATE BIPHOSPHATE LIGANDS - The invention relates to a carbonylation process for the preparation of an alkanoic acid ester comprising reacting:
| 05-08-2014 |
| 20140194647 | PROCESS FOR PREPARING DI-SUBSTITUTED SUCCINATES - The invention relates to a process for preparing (2,3) disubstituted succinates that allows (2,3) disubstituted succinates to be obtained in good purity and with acceptable reaction yields. The (2) and (3) substitutions may be the same or different. The process comprises reacting a haloacetate with a malonic acid ester into a tricarboxylate, which is further reacted to a (2,3) disubstituted tricarboxylate, hydrolysed, decarboxylated and optionally esterified. Esterified (2,3) disubstituted succinic esters may be used as internal donor in Ziegler-Natta type catalysts for the polymerisation of olefins. | 07-10-2014 |
| 20140200363 | Process for Preparing High Purity and Crystalline Dimethyl Fumarate - The present invention describes a process for the preparation of dimethyl fumarate. The process involves the esterification of fumaric acid and methanol in the presence of sulfuric acid as an acid catalyst. The high purity dimethyl fumarate contains no more than trace amounts of dimethyl sulfate. The present invention also provides a process for the preparation of highly pure dimethyl fumarate with a particle size from 20 to 250μπι. | 07-17-2014 |
| 20140206894 | Method and System for Production of Oxalic Acid and Oxalic Acid Reduction Products - The present disclosure is a method and system for production of oxalic acid and oxalic acid reduction products. The production of oxalic acid and oxalic acid reduction products may include the electrochemical conversion of CO | 07-24-2014 |
| 20140206895 | Method and System for Production of Oxalic Acid and Oxalic Acid Reduction Products - The present disclosure is a method and system for production of oxalic acid and oxalic acid reduction products. The production of oxalic acid and oxalic acid reduction products may include the electrochemical conversion of CO | 07-24-2014 |
| 20140206896 | Method and System for Production of Oxalic Acid and Oxalic Acid Reduction Products - The present disclosure is a method and system for production of oxalic acid and oxalic acid reduction products. The production of oxalic acid and oxalic acid reduction products may include the electrochemical conversion of CO | 07-24-2014 |
| 20140275612 | Dual Catalyst Esterification - Methods, processes, apparatus, equipment and systems are disclosed for converting carboxylic acids into esters by esterification with alcohol and a dual catalyst. The method combines a homogenous and heterogeneous catalyst in one or more reactors to increase the conversion of carboxylic acids compared to using a homogenous and/or heterogeneous catalyst independently. The invention converts free fatty acids into esters by esterification with alcohol and a dual catalyst such that the reaction mixture contains sufficiently low free fatty acids and the amount of free fatty acids in the product stream leaving the process remains stable over time. | 09-18-2014 |
| 20140296564 | PREPARATION PROCESS OF NANOCATALYSTS WITH (111) CRYSTAL FACET EXPOSED AND PROCESS FOR VAPOUR-PHASE CO OXIDATIVE COUPLING TO OXALATE - The invention belongs to the technical field of preparing oxalate in coal to ethylene glycol, aiming at providing a preparation process for nanocatalysts with (111) crystal facet exposed and a process for vapour-phase CO oxidative coupling to oxalate. The nanocatalysts with (111) crystal facet exposed comprise carrier, active component and promoter on the carrier, wherein, in term of the weight of the carrier, the active component accounts for 0.05-2% of the weight of the carrier, the weight percentage of metal elements in the promoter is 20% or less. The nanocatalysts with (111) crystal facet exposed are prepared by the nanometals in situ supporting process. The preparation process is simple in procedure, has low energy consumption and can precisely control the size and exposed crystal facet of the active component nanoparticles. The obtained nanocatalysts with (111) crystal facet exposed are highly active for vapour-phase CO oxidative coupling to oxalate at a lower loading of noble metal. | 10-02-2014 |
| 20140336406 | SYNTHESIS OF METAL ALKOXIDES - A process for preparing metal alkoxides starting with a metal chloride and esters of either succinic acid or glutaric acid to produce metal alkoxide, an acid anhydride and alkyl chloride. Esterification of the acid anhydride with alcohol regenerates the ester of organic acid. The first step is carried out under anhydrous conditions. By regenerating the organic acid esters in the process, the only byproduct is an alkyl chloride. | 11-13-2014 |
| 20150141693 | PROCESS FOR ACRYLATE PRODUCTION - Disclosed are methods for the continuous flow production of acrylic acid and derivatives thereof from an epoxide feedstock. In one embodiment, the method includes the steps of: contacting a process stream comprising ethylene oxide and an organic solvent with a carbonylation catalyst and carbon monoxide to provide a reaction stream containing beta propiolactone; applying the reaction stream containing the beta propiolactone to a nanofiltration membrane to produce a permeate stream containing beta lactone and a retentate stream containing carbonylation catalyst; and treating the permeate stream under conditions to convert the beta propiolactone into an acrylate ester. In some embodiments, the retentate stream is returned to the first step of the process where it is recharged with additional epoxide and passed through the sequence again. | 05-21-2015 |
| 20160023984 | MANUFACTURING METHOD OF ESTER COMPOUND - A manufacturing method of an ester compound includes reacting, in a nonpolar solvent, a compound including, in one molecule of the compound, an ester structure and an alcoholic hydroxyl group with a compound that abstracts a proton from the alcoholic hydroxyl group. | 01-28-2016 |
| 20160083328 | PROCESS FOR CONTINUOUSLY PREPARING DI-C1-3-ALKYL SUCCINATES - The invention relates to a process for continuously preparing di-C | 03-24-2016 |
| 20180022687 | METHOD FOR PREPARING DI- OR TRICARBOXYLIC ESTERS BY ALKOXYCARBONYLATION OF DIENES HAVING CONJUGATED DOUBLE BONDS | 01-25-2018 |
