C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides

Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144)
12/1993
12/07/1993	US5268506 Process for producing α, β-unsaturated carboxylic acid
12/07/1993	US5268505 Catalytic hydrocarboxylating pentenic acid
12/07/1993	US5268283 Method for the production of detergent builder formulations utilizing spray granulated citric acid and salts thereof
12/07/1993	US5268079 Using concentrated solution of mineral acid
12/07/1993	CA1325018C Process for the preparation of benzoic acid derivatives
12/07/1993	CA1325015C Recovery process
12/02/1993	DE4218051A1 Branched-chain unsatd. fatty materials useful as lubricant additives - prepd. by reacting unsatd. fatty material with nitrile and/or acetylenic cpd. in presence of tin halide
12/02/1993	DE4218015A1 Prodn. of aryl-substd. fatty materials - by reacting unsatd. fatty material with aromatic cpd. in presence of transition metal or tin salt
12/01/1993	EP0572209A2 Process for preparing diprotected 2,3-hydroxymethyl cyclobutanol
12/01/1993	EP0572081A1 Supported metal catalyst for hydrogenating organic compounds and process for preparing it
12/01/1993	EP0571864A2 Process for the preparation of alpha,beta unsaturated carboxylic acids
12/01/1993	CN1078967A Synthetic method for 5-(2.5-xylene oxygen)-2.2-dimethyl pentoic acid
11/1993
11/30/1993	US5266723 Process for the preparation of optically active 2-aryl-alkanoic acids, especially 2-aryl-propionic acids
11/30/1993	US5266721 Process for preparing the pure enantiomers of lifibrol and its alkyl esters
11/27/1993	CA2096901A1 Electrochemical process for reducing oxalic acid to glyoxylic acid
11/27/1993	CA2096153A1 Process for preparing diprotected 2,3-hydroxymethyl cyclobutanol
11/25/1993	WO1993023359A1 Bromine catalysed oxidation processes
11/25/1993	WO1993023161A1 Process for producing methacrylic acid synthesis catalyst
11/25/1993	WO1993023150A1 Liquid extraction of aqueous solutions
11/24/1993	EP0571299A1 Process for hydrolysing alkyl dicarboxylates
11/24/1993	CN1078717A Assessment of autoignition conditions and suppression of autoignition
11/24/1993	CN1078716A Process for making succinic anhydride from Maleic anhydride
11/24/1993	CN1022827C Technology for nitration of ortho-dichlorobenzene with mixed acid processing
11/23/1993	US5264627 Method for production of methacrylic acid
11/23/1993	US5264625 Catalytic gas-phase oxidation of acrolein to acrylic acid
11/23/1993	US5264624 Crystallization, cooling and filtration
11/23/1993	US5264623 Cellulose, hemicellulose or starch pyrolysis to produce aqueous and organic phase, distillation of aqueous liquor containing acid, and esters, hydrolysis with calcium oxide
11/23/1993	US5264407 Crystalline metalloaluminum borates
11/23/1993	US5264087 Method for refining acetic anhydride by distillation
11/23/1993	US5264086 With cyclopentane or tetrachloroethylene
11/21/1993	CA2096613A1 Process for the hydrolysis of alkyl dicarboxylate
11/18/1993	EP0569620A1 Method of making 2,4,5-trihalobenzoic acid
11/18/1993	EP0569492A1 Method for purification of carboxylic acids and anhydrides
11/18/1993	DE4203481A1 Sepn. of 4- and 5-amino-indane giving high purity prods. - by pptn. of 5-isomer as di:carboxylic acid salt from organic soln. etc. useful in prodn. of azo dyes, pharmaceuticals and UV stabilisers
11/17/1993	CN1078458A Purification of high purity acrylic acid
11/16/1993	US5262566 Process for the preparation of optically active a-hydroxycarboxylic acids
11/16/1993	US5262561 Process for preparing (E)-2-propyl-2-pentenoic acid and intermediate compounds
11/16/1993	US5262548 Phosphorous/vanadium oxidation catalyst
11/16/1993	US5262547 Vapor phase reaction of a hydrocarbon with oxygen
11/16/1993	US5262314 Enzymatic oxidation of glycolic acid in the presence of non-enzymatic catalyst for decomposing hydrogen peroxide
11/16/1993	US5262014 Extractive distillation
11/16/1993	CA1324389C Process for preparing chf_ochfcf_ and chf_ochc1cf_ and novel intermediate compounds employed therein
11/13/1993	CA2095277A1 Method for the production of detergent builder formulations utilizing spray granulated citric acid and salts thereof
11/12/1993	CA2083250A1 Method of making 2,4,5-trihalobenzoic acid
11/11/1993	WO1993022269A1 Process for the preparation of 3(s)-methylheptanoic acid and intermediates therefor
11/11/1993	CA2134093A1 Process for the preparation of 3(s)-methylheptanoic acid and intermediates therefor
11/10/1993	EP0569098A2 Conversion of cycloalkanone into lactone
11/10/1993	CN1078232A Process for producing halogenophennoxyfatty acid derivatives by selective halogenation and halogenophenoxyfatty acid derivatives
11/09/1993	US5260482 Salt formation, separation
11/09/1993	US5260477 Method for preparing alpha-(4-isobutylphenyl)propionic acid or its precursor
11/09/1993	US5260466 Preparation of titanium derivatives
11/09/1993	US5260456 Process for producing itaconic anhydride
11/09/1993	US5260250 Catalyst for the production of ethylene and acetic acid
11/09/1993	US5259966 Low chlorine overbased calcium salts
11/09/1993	US5259938 Photooxidation using UV wavelengths greater than 280nm, from polyfluoroalkyl mono- and dichloromethanes in presence of chlorine
11/09/1993	CA1324135C Perfluoro(cycloaliphatic methyleneoxyalkylene) carbonyl fluorides and derivatives thereof
11/03/1993	CN1077908A Recovery of rh from residue of reaction of carbonation
11/03/1993	CN1022624C Production of carboxylic acids and esters thereof
11/03/1993	CN1022608C Catalyst for the prodn. of methacrylic acid
11/02/1993	US5258557 Mixing pentosanes with water and nitric acid; boiling, oxidation
11/02/1993	US5258553 Hydrogenation catalyst complexes
11/02/1993	US5258549 Process for preparing carboxylic acids
11/02/1993	US5258547 Process for preparing halogenated compounds
11/02/1993	US5258532 Hydroxyalkyl substituted o-hydroxynaphthoic acid derivatives; corrosion inhibitors
11/02/1993	US5258138 Phenothiazine and a 2,2,6,6-tetraalkyl piperazin-4-yl derivative to prevent addition polymerization of a mixture of acrylic monomers including an hydroxyalkyl acrylic ester; colorless
10/1993
10/28/1993	WO1993021143A1 Metal carboxylates of alkylene bis-phenol alkonic acids useful as additives for fuels and lubricants
10/28/1993	DE4213641A1 Prepn. of per:fluoro:ether carboxylic acid cpds. for use as inert fluids - by hydrolysing acyl fluoride with water recycled from extn. to minimise hydrogen fluoride content
10/28/1993	CA2102415A1 Metal salts useful as additives for fuels and lubricants
10/27/1993	EP0567331A2 Process for the production of acetic acid from methanol and carbon monoxide using supported rhodium catalyst
10/27/1993	EP0567207A2 Method of reducing impurities in aqueous monomer solutions
10/27/1993	EP0566974A1 Purification of fluorinated carboxylic acids
10/27/1993	EP0566785A1 Method for deagglomerating and re-exposing catalyst in a fluid bed reactor
10/27/1993	EP0566643A1 Process for preparing halogenated compounds.
10/27/1993	EP0398954B1 Hydroformylation process for producing aldehydes
10/27/1993	EP0271552B1 Derivatives of all-trans- and 13-cis retinoic acid and methods for preparing same
10/27/1993	CN1022561C Method for making of gallic acid from branches of tea tree and leaves of maple tree
10/26/1993	US5256819 Preparation of polyoxyalkylene-alpha,omega-dicarboxylic acids
10/26/1993	US5256817 Method for purifying a naphthalenedicarboxylic acid
10/26/1993	US5256816 Enantiomeric resolution
10/26/1993	US5256700 Carnosic acid obtention and uses
10/26/1993	US5256293 Separation of enantiomers of non-steroidal anti-inflammatory drugs and chiral selector therefor
10/23/1993	CA2094557A1 Purification of fluorinated carboxylic acids
10/23/1993	CA2088106A1 Method of reducing impurities in aqueous acrylic monomer solutions
10/20/1993	EP0566459A1 Reagent and catalytic process for cleaving protected functional groups
10/20/1993	EP0566372A2 Process for preparing ethylidene diacetate using iodide catalysts
10/20/1993	EP0566371A2 Process for converting dimethyl ether to ethylidene diacetate
10/20/1993	EP0566370A2 Integrated process for synthesizing oxygenated acetyl compounds from synthesis gas via dimethyl ether
10/20/1993	EP0566268A1 Process for the preparation of 3- or 5-fluoroaromatic compounds
10/20/1993	CN1077399A Method for deagglomerating and re-exposing catalyst in a fluid bed reactor
10/20/1993	CN1022482C Porcess for the optical resolution of -cis or-trans-permethric acid
10/19/1993	US5254796 Oxidation process
10/19/1993	US5254768 Process for producing 3,3',4,4'-tetramethyldiphenylmethane
10/19/1993	US5254760 Stabilization during distillation or purification with at least one stable nitroxyl compound together with one or more aromatic nitro compounds
10/19/1993	US5254720 Reacting aryl substituted olefin, water or alcohol, carbon monoxide in presence of palladium/copper complex catalyst
10/19/1993	US5254666 Heating polyester with alkali metal or alkaline earth metal hydroxide, acidifying
10/19/1993	US5254465 Process for manufacture of alkaline earth acetates
10/19/1993	US5254255 Enhanced extraction of valeric acid or caproic acid from aqueous mixtures
10/16/1993	CA2093989A1 Reagent and catalytic process for clearing a protected function
10/13/1993	EP0564862A1 Process for recovering rhodium from waste material generated in carbonylation reactions
10/13/1993	CN1077200A Process

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