Patents
Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144)
06/1994
06/22/1994CN1025117C Synthetic technology for p-phthalyl chloride
06/21/1994US5322960 Using synergistic mixture of N-oxyl compound, phenol compound, phenothiazine
06/21/1994US5322959 Producing ibuprofen esters
06/21/1994US5322922 Copolyamide or copolyimide-amide containing sulfo groups
06/18/1994CA2111597A1 4-hydroxy-2,3,5-trifluorobenzoic acid and a process for its preparation
06/18/1994CA2110422A1 Alkaline earth metal sodium acetate, a process for its preparation and its use
06/18/1994CA2110317A1 Alkaline earth metal potassium acetate, a process for its preparation and its use
06/15/1994EP0601662A1 Catalyst for carbonylating naphthalene mono- and disulfonates and process using said catalyst
06/15/1994EP0601458A2 Separation process
06/15/1994EP0601414A1 Process for the preparation of acylated aromatics
06/15/1994EP0601177A1 Method for preparing aromatic carboxylic acids.
06/15/1994CN1087896A Process for the preparation of cyclopentene, cyclopentane and cyclohexane derivatives
06/14/1994US5321158 Oxidation of olefins and vicinal diols by hydrogen peroxide using rhenium catalyst
06/14/1994US5321157 Process for the preparation of adipic acid and other aliphatic dibasic acids
06/14/1994US5321156 Process for preparing alkali metal salts of 3-hydroxypropionic acid
06/14/1994US5321155 Process for the production of cyclohexyladipates and adipic acid
06/14/1994US5321154 Using optically active phenyl amine-type compound as a resolvi resolving agent
06/09/1994WO1994012460A1 Process for preparing substantially pure enantiomers of phenylpropionic acids
06/09/1994WO1994012459A1 A process for the preparation of a trimer acids product of improved colour
06/09/1994WO1994012451A1 SELECTIVE PRECIPITATION OF α-ARYL CARBOXYLIC ACID SALTS
06/09/1994WO1994012275A1 Chiral adsorbents and preparation thereof as well as compounds on which the adsorbents are based and preparation of these compounds
06/09/1994CA2149436A1 A process for the preparation of a trimer acids product of improved colour
06/08/1994EP0600375A1 Process for producing 2,6-naphthalenedicarboxylic acid
06/08/1994EP0600367A1 Method for preparing aromatic vinyl compounds
06/08/1994EP0600333A1 Catalytic oxidation of isobutane to methacrylic acic and methacrolein
06/08/1994EP0600317A1 Process for the preparation of halogenated benzoic acids
06/08/1994CN2167777Y Internal tri-rib talcum porcelain-ring carrier
06/08/1994CA2103745A1 Separation process
06/07/1994US5319134 Process for introducing a carboxyl group to an aromatic carboxylic acid or a derivative thereof
06/07/1994US5319131 α-fluoroacrylic acid esters and polymers thereof
06/07/1994US5319110 Process for the preparation of 3,4-dihydroxybutanoic acid and salts thereof
06/07/1994US5319106 Stabilization of mixtures of maleic anhydride and acrylic acid during distillation
06/07/1994CA1329982C Composition containing divalent manganese ion and method for preparing the same
06/01/1994EP0599688A1 Process for O-alkylation of phenolic compounds
06/01/1994EP0370083B1 Seal for rotatable shaft
06/01/1994CN1087290A Multimetal oxide compositions
05/1994
05/30/1994CA2110085A1 Process for the preparation of halogenated benzoic acids
05/26/1994WO1994011332A1 A novel arylpropionic derivative, a process for the preparation and the use thereof as an analgesic agent
05/25/1994CN1024660C Oxidation process for mfg. aromatic acids from alkylaromatic compounds
05/25/1994CN1024658C Process for carbonylation of acetylenically unsaturated compounds
05/24/1994US5315043 Aromatic nucleophilic fluorination
05/24/1994US5315037 Process for purification of acrylic acid
05/24/1994US5315033 Nafion
05/24/1994US5315030 Catalytic carbonylation of ethers and thioethers
05/24/1994US5315029 Ibuprofen
05/24/1994US5315028 Olefinic process for preparing aryl-substituted aliphatic carboxylic esters
05/24/1994US5315026 Process for preparing aryl-substituted aliphatic carboxylic acids and their esters using cyclic phosphine catalysts
05/24/1994US5315021 Process for removing chlorophyll color impurities from vegetable oils
05/24/1994US5314877 Cariostatic
05/18/1994EP0597751A1 Process for recovery of alkali metal or alkali earth metal terephtalate and alkylene glycol from alkylene polyterephtalates
05/18/1994EP0597671A1 Low chlorine overbased calcium salts
05/18/1994EP0597662A1 Nickel catalyst containing a clay binder
05/18/1994EP0597235A1 Production of citric acid and trisodium citrate from molasses
05/18/1994EP0597151A1 Method for preparing formic acid
05/18/1994CN1086804A A process for the preparation of adipic acid and other aliphatic dibasic acids
05/18/1994CN1086803A A recycling process for the production of adipic acid and other aliphatic dibasic acids
05/18/1994CN1086741A Polymeric carbonylation catalyst system
05/18/1994CN1024543C Process for bicyclohexyl-3,4,3,4-tetra-formic acid
05/17/1994US5312982 Process for the preparation of β-halogeno-tert.-alkyl-carboxylic acid chlorides
05/17/1994US5312981 Hydrolysis of alkyl dicarboxylates
05/17/1994US5312979 Catalytic carbonylation of acid to form diacids
05/17/1994US5312978 Oxidizing vitamin A aldehyde
05/17/1994US5312976 Process for the preparation of 2-hydroxy-naphthalene-6-carboxylic acid
05/17/1994US5312975 Using a transition metal catalyst
05/17/1994US5312969 Linear dicarbonylation of difunctionalized butenes
05/17/1994US5312958 Process for producing 4-bromomethylbiphenyl compounds
05/17/1994US5312941 Preparation from dicarboxylic acid, calcium hydroxide and/or oxide, and hydroxides of aluminum and sodium or sodium aluminate; use to stabilize halogen-containing thermoplastic resins
05/17/1994US5312935 Purification of fluorinated carboxylic acids
05/17/1994US5312933 Method of producing symmetrical difatty acid diamides
05/17/1994CA1329613C Leukotriene antagonists
05/11/1994WO1994010122A1 Process for the preparation of carboxylic acids and esters thereof by oxidative cleavage of unsaturated fatty acids and esters thereof
05/11/1994WO1994010121A1 Depolymerization of substantially amorphous polyesters
05/11/1994WO1994010106A2 Acid catalyst and use thereof in alkylation of olefins with tertiary alkanes
05/11/1994WO1994010083A1 Method of recovering iodine from iodated organic compounds
05/11/1994EP0596859A2 Carbonylation catalyst
05/11/1994EP0596672A2 Radical grafted carbonyl containing compounds and preparation
05/11/1994EP0596632A1 Process for preparing carboxylic acids
05/11/1994EP0596484A1 Process for preparing formic acid
05/11/1994EP0596483A2 Process for the preparation of methyl formiate
05/11/1994CN1086509A Preparation of formic ether
05/11/1994CN1086508A Preparation of formic acid
05/11/1994CA2147742A1 Process for the preparation of carboxylic acids and esters thereof by oxidative cleavage of unsaturated fatty acids and esters thereof
05/11/1994CA2147373A1 Method of recovering iodine from iodated organic compounds
05/11/1994CA2145747A1 Depolymerization of substantially amorphous polyesters
05/11/1994CA2102332A1 Low chlorine overbased calcium salts
05/10/1994US5310959 Reacting 1-decyne with 1,4-dihalo-2-butyne using a strong base and then reacting with 5-hexynoic acid; reacting with an amine in the presense of carbonyldiimidazole to amidate
05/10/1994US5310948 Cobalt catalyst and hydroxypyridone
05/10/1994US5310944 Caprolactone from cyclohexanone, organoarsinic acid catalyst that can be reused
05/10/1994US5310905 Depolymerizing in autoclave with aliphatic monocarboxylic acid
05/10/1994US5310419 Method of preparing inorganic polymeric water complexes and products so produced
05/10/1994CA2102766A1 Enhanced process for the recuperation of alkaline or alkaline earth metal terephtalate and of alkyleneglycol from alkylene polyterephtalates
05/10/1994CA1329396C Method for producing ibuprofen
05/06/1994CA2109473A1 Process for preparing carboxylic acids
05/06/1994CA2102471A1 Carbonyl containing compounds via radical grafting
05/05/1994DE4236724A1 Verfahren zur Rückgewinnung von Jod aus jodierten organischen Verbindungen Process for the recovery of iodine from iodinated organic compounds
05/04/1994EP0595576A2 Stabilized sorbic acid or salt thereof
05/04/1994EP0595369A1 Alkene compounds
05/04/1994EP0594814A1 Metal carboxylates of alkylene bis-phenol alkonic acids useful as additives for fuels and lubricants.
05/04/1994EP0594758A1 Novel process for aromatic bromination
05/04/1994EP0594608A1 Chiral catalysts for enantioselective synthesis.