Patents
Sitemap › C07 - Organic chemistry › C07C - Acyclic or carbocyclic compounds › 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)
12/2000
12/05/2000US6156868 Preparing dibasic acids, such as adipic acid, by oxidizing a hydrocarbon with oxygen,
11/2000
11/30/2000WO2000071500A1 Halogen compounds
11/30/2000WO2000071248A1 Process for producing catalyst
11/30/2000DE19928128C1 Preparation of ether-carboxylic acids and salts, useful as mild detergent in laundry and cosmetic formulations, uses more than amount of alkali in oxalkylation and Williamson alkylation
11/30/2000DE19924533A1 Fractional condensation of acrylic acid-containing oxidation gas with acrylic acid oligomer drawn off and cracked to give acrylic acid which is fed to the quenching liquid circuit
11/30/2000DE19924532A1 Novel separating column used in fractional condensation of acrylic acid-containing partial oxidation gas mixtures contains both dual-flow- and hydraulically-sealed crossflow-plates
11/29/2000EP1055670A1 Process for the production of maleic anhydride
11/29/2000EP1055662A1 A process for producing acrylic acid
11/29/2000EP1055661A1 Process for producing sorbic acid or salts thereof
11/29/2000EP1055660A1 Process for producing highly pure aromatic polycarboxylic acid
11/29/2000EP1055659A1 Process for the preparation of neodymium neodecanoate and use thereof as catalytic component for the solution polymerisation of butadiene
11/29/2000EP1055455A2 Molybdenum-based complex oxide catalysts; use thereof for producing (meth)acrolein and (meth)acrylic acid
11/29/2000EP1055408A1 Sorbate preserved compositions, process for their manufacture and their use
11/29/2000EP1054856A1 Process for treating cobalt catalyst in oxidation mixtures of hydrocarbons to dibasic acids
11/29/2000EP1054855A1 Process for preparing aromatic carboxylic acids with efficient treatments of gaseous effluent
11/29/2000EP1054727A1 Method for the combinatorial production and testing of heterogeneous catalysts
11/29/2000CN1274713A Process for preparation of sorbic acid and its salt
11/29/2000CN1274712A Preparation of food-level calcium acetate by using egg shell and other biological waste as raw material
11/28/2000US6153800 Hydroformylation of unsaturated organic compounds in the presence of phosphite ligands and monodentate phosphine
11/28/2000US6153792 Producing carboxy acids from carbonylation with carbon monoxide, catalyst, flashing and forming carboxylic acids
11/28/2000US6153791 Process for purifying 2-keto-L-gulonic acid
11/28/2000US6153790 Acid substituted aromatic, oxidant, catalyst, removal, condensation with acid and water, continuous recovering
11/28/2000US6153783 Method for preparing a difunctional aliphatic organic compound
11/28/2000US6153774 Silver ion chromatography of high purity conjugated linoleic acid (CLA)
11/28/2000US6153767 Production process for pyromellitic dianhydride
11/28/2000US6153758 Complexing with transition metals to form a chiral complexes as a chiral catalysts for stereocontrolled reactions, in particular diastereo and enantioselective reduction, hydroformylation, hydrosilylation, hydrocyanation
11/23/2000WO2000069808A1 Process for preparing r-(-)-carnitine from s-(-)-chlorosuccinic acid or from a derivative thereof
11/23/2000DE19923274A1 Homo-conjugated triene preparation in high yield, by sequential Wittig reactions of bis-ylid with two aldehyde components, useful in synthesis of highly unsaturated fatty acids, leukotrienes or pheromones
11/23/2000DE19923121A1 Hydrogen peroxide oxidation of primary alcohols to give aldehydes and carboxylic acids uses a catalyst containing a manganese salt, a 1,4,7-tri-(1-20C alkyl)-1,4,7-triazacyclononane and a co-ligand
11/23/2000DE19922934A1 New 5,5-dihalo- or 4,5,5-trihalo-4-pentenoic acid derivatives, useful as bactericides, fungicides, insecticides, acaricides and nematocides, especially plant fungicides
11/23/2000DE19922643A1 Herstellung von aliphatischen alpha,omega-Dicarbonsäuren The preparation of aliphatic alpha, omega-dicarboxylic acids
11/23/2000CA2372424A1 Process for preparing r-(-)-carnitine from s-(-)-chlorosuccinic acid or from a derivative thereof
11/22/2000EP1053994A1 Method for treating an organic liquid contaminated with an iodide compound
11/22/2000EP1053993A1 Potassium sorbate granulate and production processes thereof
11/22/2000EP1053992A1 Production of aliphatic alpha, omega-dicarboxylic acids
11/22/2000EP1053991A1 Method and apparatus for improving the uniformity of distribution of a phosphorus containing agent throughout a maleic anhydride catalytic reactor
11/22/2000EP1053220A1 Improved separation processes
11/22/2000EP1053219A1 Improved separation processes
11/22/2000EP1053210A1 Process for producing anionic clays using magnesium acetate
11/22/2000CN1274343A Process for prepn. of improved vanadium-phosphorus catalysts and use thereof for prodn. of maleic anhydride
11/22/2000CN1274301A Process for prepn. of improved vanadium-phosphorus catalysts and use thereof for prodn. of maleic anhydride
11/22/2000CN1273962A Process for synthesizing potassium formate
11/22/2000CN1058701C Process for prodn. acrylic acid
11/22/2000CN1058700C Process for purifying acetic acid
11/21/2000US6150554 Oxidation process using periodic acid
11/21/2000US6150553 Reacting paraxylene with air in acetic acid in presence of catalyst and pressurization; cooling off-gas stream; azeotropic dehydration; purifying; introducing condensate and mother liquor to decanter; returning organic phase
11/21/2000US6150402 Natriuretic compounds
11/21/2000US6149836 Nondiscoloring, storage stable liquid melt of an aliphatic or cycloaliphatic dicarboxylic acid of 6 to 44 carbon atoms in a lactam of an aliphatic alpha, omega-aminocarboxylic acid having 6 to 16 carbon atoms
11/16/2000WO2000068346A1 A process for concentrating azelaic acid
11/16/2000WO2000068290A2 Poly(3-cyclopropyl-3-hydroxypropionate) and processes for its preparation and derivatives thereof
11/16/2000WO2000068177A1 Crystal of 2-hydroxynaphthalene-3-carboxylic acid and process for the preparation thereof
11/16/2000WO2000067589A1 Method for manufacturing rumen bypass feed supplement
11/16/2000CA2402258A1 A process for concentrating azelaic acid
11/16/2000CA2336671A1 Crystal of 2-hydroxynaphthalene-3-carboxylic acid and process for the preparation thereof
11/15/2000EP1052240A1 Process for the preparation of substituted 3-hydroxybutyrate esters
11/15/2000EP1052239A1 Process for producing pyromellitic acid
11/15/2000EP1052017A2 Catalyst containing Mo, Bi, Fe, Ce and Zr; its use in the production of unsaturated aldehyde and unsaturated carboxylic acid
11/15/2000EP1052016A2 P- and Mo-based multimetallic catalyst, its preparation and its use for producing methacrylic acid
11/15/2000EP1051385A1 Processes for preparing oxygenates and catalysts therefor
11/15/2000EP1051384A1 Method for producing a purified alkaline metal terephthalate, derived from the products of saponification of polyterephthalates
11/15/2000CN1273234A Method for preparing substituted 3-hydroxybutyrate
11/15/2000CN1273233A Method and equipment for washing sugar with calcium cirtrate
11/15/2000CN1273232A Producing method of methyl acrylic acid
11/15/2000CN1273136A Method for avoiding polymerization generation in film-type evaporator
11/14/2000US6147256 Co/Cr catalyzyed oxidation of cyclohexane
11/14/2000US6147252 Ester interchange between alkyl ester of methacrylic or acrylic acid and alcohol in presence of catalyst by continuously conducting said reaction in continuous multistage distillation column while distilling off by-product alcohol
11/14/2000US6147229 Method for producing magnesium fulvate from humus material
11/14/2000US6146534 Thermally-managed separation and dewatering processes for recovering acid products
11/09/2000WO2000066529A1 A production method of aromatic carboxylic acids
11/09/2000WO2000066525A1 Novel bicycloheptene derivatives and process for the preparation thereof
11/09/2000WO1998005622A3 Process for the separation of acrylic acid
11/08/2000EP1015407A4 Method of making hydrogenated acids
11/08/2000EP0901454B1 Process for the selective production of acetic acid
11/08/2000EP0794182B1 Process for producing 2-omega-alkoxycarbonylalkanoyl)-4-butanolide and long-chain omega-hydroxy carboxylic acid
11/08/2000CN1272839A Process for preparing i(o)-(carboalkoxy) phenylmethanesulfonyl chloride derivatives
11/08/2000CN1058257C Process for production of cyclohexyl adipates
11/08/2000CN1058256C Method and apapratus for purifying acrylic acid
11/08/2000CN1058199C Mass transfer in plate columns and apparatus for this purpose
11/07/2000US6143930 Employing a multiple distillation process coupled with an optional extraction of acetaldehyde in manufacture of high purity acetic acid
11/07/2000US6143928 Catalysts for low temperature selective oxidation of propylene, methods of making and using the same
11/07/2000US6143927 Methods for removing catalyst after oxidation of hydrocarbons
11/07/2000US6143926 Process for producing pure terephthalic acid with improved recovery of precursors, solvent and methyl acetate
11/07/2000US6143925 Liquid phase oxidation of an alkyl aromatic compound with a molecular oxygen-containing gas under high temperature/high pressure conditions in an oxidation reactor
11/07/2000US6143205 Mixtures containing monomers and stabilizers
11/02/2000WO2000064850A1 Process for production of organic acids and esters thereof
11/02/2000WO2000064555A2 Solvent extraction process
11/02/2000WO2000046235B1 Novel betulinic acid derivatives, processes for preparing such derivatives and its use as cancer growth inhibitors
11/02/2000EP1048642A1 A process for producing methacrylic acid
11/02/2000EP1047483A1 Separation process
11/02/2000CA2370894A1 Solvent extraction process
11/01/2000CN1272104A Method for producing chlorocarboxylic acid chlorides
11/01/2000CN1272103A Recovery of 2,6-naphthalene dicarboxylic acid from polyesters
11/01/2000CN1271719A Process for extracting pyruvic acid from fermented liquid of pyruvic acid and preparing sodium pyrouvate
11/01/2000CN1271718A Process for preparing barium carboxylate by reaction of witherite on carboxylic acid
11/01/2000CN1057994C Method for concentrating gamma-linolenic acid in natural scabish oil
10/2000
10/31/2000US6140535 Iridium-catalyzed carbonylation process for the production of acetic acid
10/31/2000US6140534 Filtration, crystallization, separation
10/31/2000US6140529 Synthesis of optically active cyclohexylphenylglycolate esters
10/31/2000US6140428 Depolymerization of polyhexamethylene adipamide by treatment with a base in an aqueous alcohol solution, separating the hexamethylene diamine and electrolyzing the resulting adipic acid salt to yield adipic acid; by-product inhibition
10/31/2000CA2092049C Process for the recovery of rhodium from residues of carbonylation reactions
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