| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
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| 01/12/2000 | EP0970068A1 Process for the preparation of a carboxylic anhydride |
| 01/12/2000 | EP0970035A1 A process for the recovery of lactic acid |
| 01/12/2000 | EP0970034A1 Method for producing carboxylic acids or their esters by carbonylation of olefins |
| 01/12/2000 | EP0970032A1 Method for preparing cleaved products from castor oil or derivatives thereof |
| 01/12/2000 | EP0846029B1 Method for separating a palladium catalyst |
| 01/12/2000 | EP0787118B1 Cation and vanadium substituted heteropolyacid catalysts for vapor phase oxidation |
| 01/12/2000 | CN1241177A Substed. 4-biphenyl-4-hydroxybutyric acid derivs. as matrix metalloprotease inhibitors |
| 01/12/2000 | CN1241147A Process for producing vanadium phosphorus oxide catalyst |
| 01/12/2000 | CN1241146A Catalysts for oxidation of ethane to acetic acid, process of making same and use |
| 01/12/2000 | CN1240786A Process for preparing syringic acid |
| 01/12/2000 | CN1240785A Process and apparatus for producing aromatic carboxylic acid |
| 01/12/2000 | CN1048197C Maleic anhydride catalyst contg heavy rare-earth oxide and its use |
| 01/11/2000 | US6013837 Aromatic amides, method for preparing and compositions containing same, and use thereof as pesticides |
| 01/11/2000 | US6013835 Filtering a liquid dispersion to form a crude terephthalic acid filter cake; dissolving and heating in a selective crystallization solvent; crystallizing by flash evaporating the solvent; separating crystallized purified acid |
| 01/11/2000 | US6013832 Process for the production of benzene derivatives |
| 01/11/2000 | US6013831 Processes for the production of high-purity dimethyl 2, 6-naphthalenedicarboxylate and naphthalenedicarboxylic acid |
| 01/11/2000 | US6013816 Hydroformylating unsaturated c.sub.4-c.sub.12 carboxylic acid, ester, or nitrile to produce linear .omega.-formyl-carboxylic acid or linear formyl nitrile in presence of water, carbon monoxide, hydrogen and catalyst |
| 01/11/2000 | US6013795 Nontoxic, rapidly biodegradable upon heating |
| 01/11/2000 | US6013597 Catalysts for the oxidation of ethane to acetic acid processes of making same and, processes of using same |
| 01/11/2000 | CA2055282C Process for the preparation of rare-earth and ammonium twin oxalates, their use in preparing rare-earth oxides, and rare-earth oxides thereof |
| 01/06/2000 | WO2000000457A1 Method of purifying aromatic dicarboxylic acids |
| 01/06/2000 | WO2000000284A2 Catalyst systems for the one step gas phase production of acetic acid from ethylene |
| 01/06/2000 | CA2276899A1 Methods of treating the oxidation mixture of hydrocarbons to respective dibasic acids |
| 01/05/2000 | EP0968995A1 Process for continuously producing ester of acrylic or methacrylic acid |
| 01/05/2000 | EP0968993A1 Process for the treatment of natural fatty acids and their use |
| 01/05/2000 | EP0968992A1 Process for producing lanthanide series metal corboxylates and their use for the polymerization of diene monomers |
| 01/05/2000 | EP0968220A1 6,6'-bis-(1-phosphanorbornadiene) diphosphines |
| 01/05/2000 | EP0968169A1 Method for isolating 3- 2-chloro-4-(trifluoromethyl)-phenoxy]-benzoic acid |
| 01/05/2000 | EP0968167A1 Dicarboxylic acid crystallizates |
| 01/05/2000 | EP0968166A1 Process for the manufacture of carboxylic acids |
| 01/05/2000 | EP0968165A1 Heterogeneous vapor phase carbonylation process |
| 01/05/2000 | DE19837069C1 New cinnamic acid derivatives useful as insecticide intermediates |
| 01/05/2000 | DE19829477A1 Verfahren zur Reinigung von Acrylsäure oder Methacrylsäure durch Kristallisation und Destillation A method for purifying acrylic acid or methacrylic acid by crystallization and distillation |
| 01/05/2000 | CN1240205A Preparation of prepenoic acid and its polymerization inhibition |
| 01/05/2000 | CN1240204A Process for preparing aromatic carboxylic acid |
| 01/05/2000 | CN1047959C Supported catalyst for preparing phthalic anhydride |
| 01/04/2000 | US6011171 Process for synthesis of tertiary carboxylic acids and the esters thereof |
| 12/29/1999 | WO1999067194A1 High productivity process to produce maleic anhydride from n-butane |
| 12/29/1999 | WO1999067192A2 PROCESS FOR THE SOLID PHASE SYNTHESIS OF ALDEHYDE, KETONE, OXIME, AMINE, HYDROXAMIC ACID AND α,β-UNSATURATED CARBOXYLIC ACID AND ALDEHYDE COMPOUNDS |
| 12/29/1999 | WO1999067021A1 Process for the preparation of improved vanadium-phosphorus catalysts and use thereof for the production of maleic anhydride |
| 12/29/1999 | EP0967015A2 Use of ferrocenyl ligands in catalytic enantioselective hydrogenation |
| 12/29/1999 | EP0966422A1 Process for the production of acetic acid |
| 12/29/1999 | EP0966421A2 A method for purification of acids for use in semiconductor processing |
| 12/29/1999 | EP0966405A1 Treatment of effluent streams containing organic acids |
| 12/29/1999 | EP0966324A1 Method for producing shell catalysts for catalytic gas-phase oxidation of aromatic hydrocarbons |
| 12/29/1999 | EP0833809B1 Nitric acid hydrolysis of polyamides |
| 12/29/1999 | EP0790973B1 Method of preparing tartaric acid |
| 12/29/1999 | CN1239940A Alpha-branched fluoroalkylcarbonyl fluorides and their derivatives |
| 12/29/1999 | CA2335511A1 Process for the synthesis of .alpha.,.beta. alkenoate resin compounds |
| 12/29/1999 | CA2301061A1 High productivity process to produce maleic anhydride from n-butane |
| 12/29/1999 | CA2301048A1 Process for the preparation of improved vanadium-phosphorus catalysts and use thereof for the production of maleic anhydride |
| 12/28/1999 | US6008408 Hydroxycarbonylation of pentenoic acids to adipic acid by carbon monoxide and water in presence of a catalyst containing iridium and or/rhodium and atleast iodonated promoter |
| 12/28/1999 | US6008407 Reacting chlorotrifluoroethylene and 1,3-butadiene to produce chlorotrifluorocyclohexenes, dehydrohalogenating the mixture of cyclohexenes with phase transfer catalyst in presence of alkali metal hydroxide without solvent |
| 12/28/1999 | US6008401 Process for producing an optically active compound |
| 12/28/1999 | US6008384 Method and Ru,Re,Sn/carbon catalyst for hydrogenation in aqueous solution |
| 12/23/1999 | WO1999065854A1 Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
| 12/23/1999 | WO1999065853A1 Method for preparing p-hydroxymandelic compounds optionally substituted |
| 12/23/1999 | WO1998058896A8 Process for the manufacture of carboxylic acids |
| 12/23/1999 | DE19921924A1 Verwendung von Ferrocenylliganden zur katalytischen enantioselektiven Hydrierung Use of ferrocenyl ligands for the catalytic enantioselective hydrogenation |
| 12/23/1999 | CA2335231A1 Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
| 12/23/1999 | CA2334848A1 Method for preparing p-hydroxymandelic compounds optionally substituted |
| 12/22/1999 | EP0965576A1 Process for the preparation of tartaric acid from a raw material containing potassium hydrogen tartrate |
| 12/22/1999 | EP0965574A2 Process for enantioselective hydrogenation |
| 12/22/1999 | EP0964744A1 Method for producing acid phthalic anhydride and an appropriate shell catalyst containing titanium-vanadium-cesium |
| 12/22/1999 | EP0733033B1 Pharmaceutically active substituted aromatic compounds |
| 12/22/1999 | CN2354958Y Apparatus for producing trichlorobenzylidyne |
| 12/22/1999 | CN1239090A Process for producing purified terephthalic acid |
| 12/22/1999 | CN1047588C Process for recovery of carbonylation product |
| 12/21/1999 | US6005148 Supported catalysts |
| 12/21/1999 | US6005121 High productivity process for the production of maleic anhydride |
| 12/21/1999 | US6005003 Osteoporosis treatment |
| 12/16/1999 | WO1999064154A1 Poly-oxyanions as anchoring agents for metal complexes |
| 12/16/1999 | WO1999044707A3 Purification of organic acids using anion exchange chromatography |
| 12/15/1999 | EP0963973A1 Production process for ether carboxylate salt |
| 12/15/1999 | EP0963788A2 Manganese-containing catalyst for lower alkane oxidative dehydrogenation and a process for producing olefins |
| 12/15/1999 | EP0759023B1 Liquid phthalic anhydride recovery process |
| 12/15/1999 | CN1238754A Purification of acrylic acid obtained by catalytic oxidation of propylene |
| 12/15/1999 | CN1238752A Method for preparing 4-hydroxybenzaldehyde and its derivatives |
| 12/15/1999 | CN1238714A Shell catalyst for producing acetic acid by gas phase oxidation of unsaturated C4 hydrocarbons |
| 12/15/1999 | CN1238328A Process for producing aromatic carboxylic acid |
| 12/15/1999 | CN1047381C sodium oxalate producing process and equipment through double-circulation continuous dehydrogenation in triphase fluid bed |
| 12/15/1999 | CN1047380C Method for preparing of chloracetic acid |
| 12/15/1999 | CN1047379C Process for preparing alpha, alpha'-dichloro-hexandioic acid |
| 12/14/1999 | US6002055 Reacting fluorinated epoxide with dihalogen in presence of metal or metal containing promoter selected from nickel, copper, nickel-copper and nickel-zinc and recovering dihaloperfluoroalkanes |
| 12/14/1999 | US6002043 Elimination of the low temperature condensers, solvents and catalysts; efficiency; pressure between 2 ans 60 bar used to facilitate separation of hydrochloric acid, carbon dioxide and phosgene |
| 12/14/1999 | US6002019 Process for the production of petrochemicals |
| 12/14/1999 | CA2041755C Process for preparing double rare earth and ammonium double oxalates; use thereof for preparing rare earth oxides; double oxalates and oxides thus obtained |
| 12/10/1999 | CA2273451A1 Production process for ether carboxylate salt |
| 12/09/1999 | WO1999062917A1 Production of optically active phospholanes |
| 12/09/1999 | WO1999062913A1 Powdery, solid rare earth carboxylates with improved solubility |
| 12/09/1999 | WO1999062859A1 Process for producing fluoroalkylcarboxylic acid |
| 12/09/1999 | WO1999062858A1 Method for recovering fluorinated alkanoic acids from waste waters |
| 12/09/1999 | WO1999062857A1 Method for preparing purified terephthalic acid and isophthalic acid from mixed xylenes |
| 12/09/1999 | WO1999062856A2 Citric acid doped with alkaline or alkaline-earth ions |
| 12/09/1999 | WO1999062855A1 Hydroformylation of olefins using supported bis(phosphorus) ligands |
| 12/09/1999 | WO1999062852A1 Method for producing hexanediol-1,6 |
| 12/09/1999 | WO1999062830A1 Method for recovering fluorinated alkanoic acids from waste waters |
| 12/09/1999 | WO1999062637A1 Method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic hydrocarbons and catalysts obtained in such a manner |
| 12/09/1999 | DE19824615A1 Verfahren zur Rückgewinnung von fluorierten Alkansäuren aus Abwässern Process for the recovery of fluorinated alkane acids from wastewater |
| 12/09/1999 | DE19824614A1 Verfahren zur Rückgewinnung von fluorierten Alkansäuren aus Abwässern Process for the recovery of fluorinated alkane acids from wastewater |