Patents
Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144)
06/1998
06/09/1998US5763662 Method for producing formic acid of its derivatives
06/09/1998US5763659 Preparation of optically active 2-halopropionic acids
06/09/1998US5763658 Hydrophobic smectite clay
06/09/1998US5763656 Method of preparing tartaric acid
06/09/1998US5763655 Preparation of pentenoic acids via hydroxycarbonylation of butadiene
06/09/1998US5763654 Process for the production of acetic acid by the carbonylation of dimethyl ether
06/09/1998US5763652 Process for producing a carboxylic acid
06/09/1998US5763651 Process for manufacturing polyene esters and acids
06/09/1998US5763649 Process for producing aromatic carboxylic acids
06/09/1998US5763648 Process for producing an aromatic carboxylic acid
06/09/1998US5763481 Vinylcarboxylic acid derivatives
06/09/1998US5763373 Tall oil, water, surfactant, alkaline earth metal salt dispersion
06/09/1998CA2128719C Production method of high purity isomers of benzenedicarboxylic acids
06/04/1998WO1998023573A1 Purification of acrylic acid obtained by catalytic oxidation of propylene
06/04/1998WO1998023572A1 Solvent assisted process for recovery of phthalic anhydride in the liquid phase by distillation
06/04/1998WO1998023571A1 Liquid phthalic anhydride recovery process using a rectification tower with benzoic acid control
06/04/1998WO1998023371A1 Shell catalyst for producing acetic acid by gas phase oxidation of unsaturated c4 hydrocarbons
06/04/1998DE19649827A1 Verfahren zur Racemisierung von substituierten 4-Ketocarbonsäuren A process for the racemization of substituted 4-ketocarboxylic acids
06/04/1998DE19649426A1 Schalenkatalysator zur Herstellung von Essigsäure durch Gasphasenoxidation von ungesättigten C¶4¶-Kohlenwasserstoffen A coated catalyst for preparing acetic acid by gas-phase oxidation of unsaturated hydrocarbons C¶4¶
06/04/1998CA2272461A1 Purification of acrylic acid obtained by catalytic oxidation of propylene
06/03/1998EP0845452A1 HOAC process III
06/03/1998EP0782399A4 Hydroxycitric acid concentrate and method of making
06/03/1998CN1183811A Method for isolation and purification of lipid cell-wall components
06/03/1998CN1183761A Recovery of acetic acid from dilute aqueous streams formed during carbonylation process
06/03/1998CN1183760A Method for oxidising hydrocarbons, alcohols or ketones using heterogeneous catalyst
06/03/1998CN1038580C Process for production of terephthalic acid
06/02/1998US5760288 Process for producing aromatic carboxylic acid
06/02/1998US5760287 Process for the resolution of 6-methoxy-alpha-methyl-2-naphthaleneacetic racemic acid into its enantiomers
06/02/1998US5760284 Process and catalyst for carbonylating olefins
06/02/1998US5760279 Process for the carbonylation of alkyl alcohols
06/02/1998US5760217 Porphyrins and their synthesis from dipyrromethanes and aldehydes
06/02/1998US5760088 Wood preservatives comprising microbiocides
06/02/1998US5759826 Process of preparing an organic acid
06/02/1998US5759358 Process for pure grade acrylic acid
05/1998
05/29/1998CA2191684A1 Recycle heat exchange flash treater and process
05/28/1998WO1998022484A1 Heteroarylic-arylic diphosphines as chiral ligands
05/28/1998WO1998022436A1 Substituted 4-biphenyl-4-hydroxybutyric acid derivatives as matrix metalloprotease inhibitors
05/28/1998WO1998022421A1 Process for the simultaneous preparation of acrylonitrile and acrylic acid
05/28/1998WO1998022420A1 Process for the production of acetic acid
05/28/1998WO1998022419A1 Method for preparing a 4-hydroxybenzaldehyde and derivatives
05/28/1998WO1998022216A1 Production of aromatic carboxylic acids and recovery of co/mn cattalyst from ash
05/28/1998CA2271421A1 Process for the simultaneous preparation of acrylonitrile and acrylic acid
05/28/1998CA2268770A1 Substituted 4-biphenyl-4-hydroxybutyric acid derivatives as matrix metalloprotease inhibitors
05/27/1998EP0844251A1 Process for the production of ruthenium (III) acetate solution
05/27/1998EP0844230A2 Optical resolution method of (plus, minus)-3,4-dihydroxybutanoic acid
05/27/1998CN1183093A Process for preparation of esters of stilbenedicarboxylic acid
05/27/1998CN1182733A Method for producing diethyl ester by alcohol dehydration
05/26/1998US5756858 Process for the preparation of substituted phenylacetic acid derivatives and novel intermediates
05/26/1998US5756853 Multistage reaction of phenol by carboxylation, hydroxymethylation, oxidation and decarboxylation
05/26/1998US5756849 Reducing concentration needed
05/26/1998US5756840 Process for the preparation of a particularly pure monochloroacetic
05/26/1998US5756838 Method of asymmetrically synthesizing optically active compounds using supported phase chiral sulfonated BINAP catalyst
05/26/1998US5756837 Method of recycling a catalyst in a reaction involving the direct oxidation of cyclohexane into adipic acid
05/26/1998US5756836 Reacting methanol or methyl acetate with carbon monoxide in presence of catalyst
05/26/1998US5756834 Process for preparing fluorinated aromatics
05/26/1998US5756833 Catalytic purification and recovery of dicarboxylic aromatic acids
05/26/1998US5756814 Vinyl compound, its synthetic intermediates and processes for producing the same
05/26/1998US5756000 Water soluble, fluorine-free surfactants
05/26/1998US5755975 Separation of substances from a liquid mixture by crystallization
05/22/1998WO1998020966A1 Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating hold-up time in multi-stage arrangement
05/22/1998WO1998015517A3 Process for the recovery of lactic acid by contacting aqueous solutions containing the same with a basic organic extractant
05/22/1998CA2291080A1 Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating hold-up time in multi-stage arrangement
05/20/1998EP0842137A1 A process for the preparation of cyclopropane carboxylic acids and intermediates therefor
05/20/1998EP0714447B1 Process for preparing (l)-2-chlorpropionic acid and its salts
05/20/1998EP0636600B1 Method of purifying aromatic dicarboxylic acid
05/20/1998EP0629183B1 Mixed magnesium/zinc basic soaps
05/20/1998CN1182074A Production process of solid sodium formate and production process of oxalic acid including the same
05/20/1998CN1182068A Process for separation of mixture of enantiomers
05/20/1998CN1038409C Process for production of terephthalic acid
05/19/1998US5753495 Process for the preparation of (L)-2-chloropropionic acid and its salts using lipase from pseudomonas
05/14/1998WO1998019988A1 Alpha-branched fluoroalkylcarbonyl fluorides and their derivatives
05/14/1998WO1998019987A1 Manufacture of adipic acid
05/14/1998WO1998019986A1 A method for the production of levulinic acid and its derivatives
05/14/1998WO1998019984A1 Process for the preparation of an aldehyde
05/14/1998WO1998019789A1 Methods and devices for controlling the oxidation rate of a hydrocarbon by adjusting the ratio of the hydrocarbon to a rate-modulator
05/14/1998WO1998019511A2 Method for the preparation of citalopram
05/14/1998DE19646378A1 Recycling di:carboxylic acids and di:ol(s) from polyester waste
05/14/1998CA2270532A1 Methods and devices for controlling the oxidation rate of a hydrocarbon by adjusting the ratio of the hydrocarbon to a rate-modulator
05/14/1998CA2270521A1 Process for the preparation of an aldehyde
05/14/1998CA2267603A1 Manufacture of adipic acid
05/13/1998CN1181371A Method for purification of 2-hydroxynaphthalene -6 -carboxylic acid
05/13/1998CN1181370A Method for prepn. of trichlorine acetylchloride
05/12/1998US5750815 Olefin metathesis coupling using ruthenium and osmium carbene complexes
05/12/1998US5750791 Producing diamines and diacids
05/12/1998US5750779 Preparation process of acyl halide or sulfonyl halide
05/12/1998US5750778 Fungicide intermediates
05/12/1998US5750777 Process for the preparation of carboxylic acids by controlled oxidation of the corresponding alkanes
05/12/1998US5750776 Production of dicarboxylic acids or esters thereof
05/12/1998US5750732 Solvent extraction; dehydration
05/12/1998US5750731 Perfluorinated aromatic compounds
05/12/1998US5750679 Process for obtaining pharmacologically active compounds from complex mixtures of substances
05/12/1998US5750007 Process for the recovery of a carbonylation product
05/12/1998CA2013743C Preparation of glutaric acid derivatives
05/07/1998WO1998018750A1 Process for preparing aromatic dicarboxylic acids
05/07/1998WO1998018749A1 Production of aromatic carboxylic acids
05/07/1998WO1998018748A1 Method for preparing compounds with terminal acetylenic bonds
05/07/1998DE19645066A1 Production of catalyst for oxidation of butane to maleic anhydride
05/07/1998CA2267413A1 Production of aromatic carboxylic acids
05/07/1998CA2241568A1 Process for preparing aromatic dicarboxylic acids
05/06/1998EP0839897A1 Method for producing conjugated linoleic acid