| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
|---|
| 08/04/1999 | EP0642491B1 Process for the production of purified terephthalic acid |
| 08/03/1999 | US5932772 Separation processes |
| 08/03/1999 | US5932764 Iridium-catalyzed carbonylation process for the production of a carboxylic acid |
| 08/03/1999 | US5932735 Stabilizers |
| 07/31/1999 | CA2259095A1 Anhydrous carbonylation process for the production of acetic acid |
| 07/29/1999 | WO1999037599A2 Methods and devices for separating catalyst from oxidation mixtures containing dibasic acids |
| 07/29/1999 | DE19831817C1 Production of biphenyl carboxylic acid compounds |
| 07/29/1999 | CA2313107A1 Methods and devices for separating catalyst from oxidation mixtures containing dibasic acids |
| 07/28/1999 | EP0931049A1 Process for separating by distillation pure (meth)acrylic acid from mixtures |
| 07/28/1999 | EP0931048A1 Process for producing a catalytically active multimetal oxide material |
| 07/28/1999 | EP0797562B1 Crystallization of adipic acid |
| 07/28/1999 | EP0777640B1 Dehydration of acetic acid by azeotropic distillation in the production of an aromatic acid |
| 07/27/1999 | US5929277 Methods of removing acetic acid from cyclohexane in the production of adipic acid |
| 07/27/1999 | US5929276 Process for the preparation of anhydrous trisodium citrate |
| 07/27/1999 | US5929275 Catalyst and process for producing unsaturated aldehyde and unsaturated acid |
| 07/27/1999 | US5929274 Dissolving the crude acid by heating in a solvent, cooling to crystallize and separating; oxidizing the filtered solution, desolventizing by evaporation, cooling to crystalize and circulating the mother liquor |
| 07/27/1999 | US5929256 Selective production of maleic anhydride |
| 07/27/1999 | US5929255 Process for coproducing fumaric acid and maleic anhydride |
| 07/27/1999 | US5928485 Desalting by partial electrodialysis of di-alkali salt of hydroxyaryl acid or dicarboxylic acid then reacting with bronsted acid |
| 07/27/1999 | US5928478 Separation of linoleic acid from linolenic acid by azeotropic distillation |
| 07/21/1999 | EP0930354A2 Carboxylate overbased gels |
| 07/21/1999 | EP0929512A1 Improved method for purifying acrylic acid |
| 07/21/1999 | EP0929511A1 Molybdenum based oxidation catalysts |
| 07/21/1999 | EP0734363B1 Fluorination process |
| 07/21/1999 | CN1223635A Pentenoic acid hydroxycarbonylation method |
| 07/21/1999 | CN1223634A Method for purifying adipic acid by crystallization |
| 07/21/1999 | CN1223633A Method for purifying adipic acid in water |
| 07/21/1999 | CN1223632A Recovery of highly fluorinated carboxylic acids from the gaseous phase |
| 07/21/1999 | CN1223251A Method for producing acrylic acid |
| 07/21/1999 | CN1044249C Matrix metalloprotease inhibitors |
| 07/21/1999 | CN1044230C Terephthalic acid production |
| 07/20/1999 | US5925786 Liquid phase oxidation; removal of mother liquor in the filtering region and discharge of the spent washing fluid make use of centrifugal force, preventing clogging due to crystal deposition caused by temperature or pressure effects |
| 07/20/1999 | CA2259113A1 Carboxylate overbased gels |
| 07/20/1999 | CA2027323C Process for preparing catalysts for producing methacrylic acid |
| 07/15/1999 | WO1999035119A1 Synthesis of 3-aryl-1-indanamines |
| 07/15/1999 | WO1999035117A1 Process for making certain benzoic acid compounds |
| 07/15/1999 | CA2318489A1 Process for making certain benzoic acid compounds |
| 07/15/1999 | CA2317591A1 Synthesis of 3-aryl-1-indanamines |
| 07/14/1999 | EP0928783A1 Process for preparing dichlorofluoroacetyl halides |
| 07/14/1999 | EP0928782A2 Process for the purification of maleic anhydride |
| 07/14/1999 | EP0928781A1 Process for the preparation of rhein and its diacyl derivatives |
| 07/14/1999 | EP0928185A1 Compositions and uses thereof |
| 07/13/1999 | US5922911 Economical means for the utilization of the carbon monoxide present in the crude reaction product, carbon monoxide is not fed below the surface of the mixture in a manner to increase its concentration in liquid reaction mixture |
| 07/13/1999 | US5922908 Methods for preparing dibasic acids |
| 07/13/1999 | US5922906 Novel aromatic nitro group displacement to generate a key intermediate in the synthesis of the 2,4-bis(triflouromethyl)phenylacetic acid side chain of a class iii antiarrhythmic agent |
| 07/13/1999 | US5922905 Intermediates for fungicides |
| 07/13/1999 | US5922904 Benzoyl phthalic acids useful as chemical intermediates in the production of quinoline dyes |
| 07/13/1999 | US5922863 Diene cyclization using ruthenium and osmium carbene complexes |
| 07/13/1999 | CA2181508C Process for purifying acrylic acid prepared by propylene catalytic oxidation |
| 07/13/1999 | CA2141496C Organometallic fluorenyl compounds, preparation, and use |
| 07/08/1999 | WO1999033788A2 Method for producing aromatic bromomethyl biphenyl compounds |
| 07/08/1999 | WO1999033779A1 Process for the preparation of a carboxylic acid |
| 07/08/1999 | DE19757995A1 Verfahren zur Herstellung von aromatischen Brommethyl-Verbindungen A process for the preparation of aromatic bromomethyl compounds |
| 07/07/1999 | CN1222142A Process for mfg. sulphates of longer chain branched alkanols and alkoxylated alkanols |
| 07/07/1999 | CN1222137A Process for prodn. of alkaline metal salts and earth alkali metal salts of aryloxy-C1-C4-alkaline carboxylic |
| 07/07/1999 | CN1222133A Branched surfactant prepn. |
| 07/07/1999 | CN1221730A Extraction and application of 10-hydroxyl-delta 2-decene acid |
| 07/07/1999 | CN1221729A Method for preparity (S)-alpha-aryl propionic acid and its methyl ester by alpha-aryl ethanol asymmetric carbonylation process |
| 07/07/1999 | CN1221728A Method of synthetizing alpha-aryl propionic acid by carbonyl process |
| 07/07/1999 | CN1221727A Prepn. tech. of zinc acetate |
| 07/06/1999 | US5919987 Catalytic hydroformylation of olefin |
| 07/06/1999 | US5919978 Hydroformylation of alkadienes |
| 07/06/1999 | US5919977 Process for producing aromatic carboxylic acid and apparatus therefor |
| 07/06/1999 | US5919741 Overbased carboxylate gels |
| 07/06/1999 | US5919424 Extracting calcium from an aqueous mixture |
| 07/06/1999 | US5919341 Difluorochloracetyl, dichloracetyl and trichloracetyl chloride preparation |
| 07/06/1999 | CA2049536C Process for the preparation of 3,4-dihydroxybutanoic acid and salts thereof |
| 07/01/1999 | WO1999032427A1 Method for hydrogenating benzene polycarboxylic acids or derivatives thereof by using a catalyst containing macropores |
| 06/30/1999 | EP0926134A2 Processes for producing alpha-cyanohydrin esters and alpha-hydroxy acids |
| 06/30/1999 | EP0926125A1 Continuous process for the preparation of pyvaloyl chloride and aroyl chloride |
| 06/30/1999 | EP0926124A1 Method for purifying crude naphthalenedicarboxylic acid and process for preparing polyethylene naphthalate |
| 06/30/1999 | EP0925272A1 Method for removing by-products obtained when producing acrylic acid or methacrylic acids |
| 06/30/1999 | EP0925271A1 Process for the preparation of derivatives of fatty acids |
| 06/30/1999 | EP0925267A1 Racemization process for optically active carboxylic acids or salts or esters thereof |
| 06/30/1999 | EP0646045B1 High performance vpo catalyst and process of preparation thereof |
| 06/30/1999 | CN1221399A Industrial process for heterogeneously catalytic gas-phase oxidation of propane to form acroleine |
| 06/30/1999 | CN1221397A Process for manufacture of surfactants containing branch chain alkyl groups |
| 06/29/1999 | US5917089 Process for the carbonylation of an alcohol and/or a reactive derivative thereof |
| 06/29/1999 | US5917088 Salicyclic acid derivatives, process of preparation and uses thereof |
| 06/29/1999 | US5917079 Process for synthesizing benzoic acids |
| 06/29/1999 | US5917067 Process for producing an omega-functionalized aliphatic carboxylic acid and intermediate products of said process, including 2-oxepanone-7-substituted products |
| 06/29/1999 | US5916840 Process for preparing carboxylic acid salts and catalysts useful in such process |
| 06/29/1999 | US5916422 Crude product mixture having unsaturated compounds and carbonyl compounds as impurities in a first distillation column and then in a second distillation column of lesser pressure |
| 06/24/1999 | WO1999031038A1 Method to produce aromatic carboxylic acids |
| 06/24/1999 | DE19756913A1 Hydrogenation of benzene-dicarboxylic acid esters, on a supported catalyst, to the corresponding cyclohexane derivatives with very high selectivity and yields |
| 06/24/1999 | DE19755426A1 Recovery of natural organic fruit acids, especially oxalic acid from mixture with malic and citric acids |
| 06/24/1999 | CA2315151A1 Method to produce aromatic carboxylic acids |
| 06/23/1999 | EP0924183A1 Process for the production of dimethyldecanedioic acid |
| 06/23/1999 | EP0923527A1 A process for the preparation of 2-aryl-propionic and 2-aryl-acetic acids starting from aryl-olefins |
| 06/23/1999 | EP0923526A2 Process for the separation of acrylic acid |
| 06/23/1999 | EP0923525A1 Process for preparation of branched fatty acids |
| 06/23/1999 | EP0923524A1 Methods and devices for controlling the reaction by adjusting the oxidant consumption rate |
| 06/23/1999 | EP0923523A2 Method of preparing acrylic acid and methacrylic acid |
| 06/23/1999 | EP0610506B1 Process for producing high-purity eicosapentaenoic acid or ester thereof |
| 06/23/1999 | CN1220655A Preparation of solid powdery rare earth carboxylates by evaporation method |
| 06/23/1999 | CN1220654A Process for oxidation of alkanes |
| 06/23/1999 | CN1043757C Process for preparation of oxydiphthalic acid and purified oxydiphthalic anhydrides |
| 06/23/1999 | CN1043756C Method for separation and extraction of knoppergall tannin from solution of same |
| 06/22/1999 | US5914429 Industrial process for the continuous preparation of sodium orthohydroxymandelate |
| 06/22/1999 | US5914417 Organometallic compounds of titanium, tantalum, or niobium with at least one hydroxide, diol or glycol monoether, and fatty acid carboxylate group; form nonhydrolyzing solutions; thin dielectric films; electroceramics |