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)
11/1991
11/13/1991CN1056066A Fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons
11/12/1991US5064958 1,3-genzoxazine, 2,4-dione derivatives
11/12/1991US5064545 Process for overbasing via metal borate formation
11/12/1991CA2042304A1 Process for preparing 2,2-dimethyl-5-(2,5-dimethylphenoxy)-pentanoic acid
11/12/1991CA1291991C Antioestrogenic phenol derivatives
11/08/1991CA2027221A1 Recovery of acrylic acid and/or ethyl acrylate from black acid
11/06/1991EP0455532A1 Cooling process in a process utilizing anhydrons fluorhydric acid
11/06/1991EP0455529A1 Process for preparing dioxalates of rare earths and ammonium and their use for the preparation of rare earth oxides, dioxalates and the obtained oxides
11/06/1991EP0455416A2 Process for producing methylnorbornene dicarboxylic acid anhydride
11/06/1991EP0454743A1 Method of preparation of 8-hydroxyoctanoic acid
11/06/1991CN1055917A Method for purification of benzoic acid
11/06/1991CN1055916A One-step salt-making process for preparing naphthenic acid dedicated to paint
11/06/1991CN1055914A Process for producing unsaturated aldehydes and unsaturayed acids
11/05/1991US5063189 Hydrogenation catalyst for foods
11/05/1991US5062997 Of unsaturated fatty acids or esters
11/05/1991CA1291763C Obtaining maleic anhydride not prone to discolor
11/04/1991CA2041690A1 Cooling process associated with a process using anhydric hydrofluoric acid
10/1991
10/30/1991EP0454430A1 Method of purifying polyunsaturated aliphatic compounds and apparatus therefor
10/30/1991EP0454376A1 Process for preparing catalysts for producing methacrylic acid
10/30/1991EP0453951A1 Process for the preparation of phthalic anhydride from O-xylene
10/30/1991EP0453690A1 Method and catalyst for the dehalogenation of alpha-halogenated carboxylic acids
10/30/1991EP0201607B1 Process for producing aromatic hydroxycarboxylic acid
10/25/1991CA2040981A1 Preparation of phthalic anhydride from o-xylene
10/24/1991DE4012781A1 Carboxylic acid chloride prodn.
10/23/1991EP0453356A2 Process for the oxidation of organic compounds
10/23/1991EP0453332A1 Attrition-resistant catalytic system and its use in the oxydehydrogenation of saturated carboxylic acids, particularly in fluid bed reactors
10/23/1991EP0453022A2 Method for the purification of benzoic acid
10/23/1991EP0452882A1 Anhydrous metal salts of alpha,beta-ethylenically unsaturated carboxylic acids and related methods
10/23/1991EP0452863A2 Process for treating wastes from waste waters obtained from the production of dyes
10/23/1991EP0452806A1 Process for the preparation of carboxylic acid chlorides
10/23/1991EP0452411A1 Acid catalyzed process
10/23/1991CN1014407B Improved methanol carbohylation process
10/22/1991US5059697 Preparation of halogenated phthalic anhydrides
10/22/1991US5059272 Method for the manufacture of electronic circuits utilizing a composition with insulating and electroconductive properties
10/22/1991CA1291160C Oxygen-ruthenium oxide oxidation of 2-hydroxy-3, 3-dimethyl-butanoicacid
10/22/1991CA1291145C Preparation of a substituted succinic anhydride
10/22/1991CA1291144C Process for the preparation of a substituted succinic anhydride
10/21/1991CA2040742A1 Process for the oxydation of organic compounds
10/17/1991WO1991016308A1 Preparation of 3,4,6-trifluorophthalic acid
10/17/1991WO1991006537A3 Substituted indole-, indene-, pyranoindole- and tetrahydrocarbazole- alkanoic acid derivatives as inhibitors of pla2 and lipoxygenase
10/17/1991DE4012128A1 Verfahren zur katalysatorrueckgewinnung Method for katalysatorrueckgewinnung
10/17/1991CA2079464A1 Preparation of 3,4,6-trifluorophthalic acid
10/16/1991EP0451873A1 Derivatives of 2,2-dimethyl cyclopropanecarboxylic acid substituted at c-3 by a saturated halogenated chain, process for their preparation and their use in the synthesis of pesticidal products
10/16/1991EP0451714A1 Process for the acylation of alkyl aromatics
10/16/1991EP0451614A1 Fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons
10/15/1991WO1991016294A1 Process for catalyst recovery
10/15/1991US5057470 Regeneration of noble metal catalysts used in hydrodehalogenation of halogen-substituted hydrocarbons containing fluorine and at least one other halogen
10/15/1991US5057197 Process and apparatus for the removal of undesired components from aqueous feedstocks
10/15/1991US5057192 Acetone removal from acetic anhydride production process
10/15/1991CA2080478A1 Process for catalyst recovery
10/15/1991CA1290761C Chemical complex of potassium acetylsalicylate and preparation thereof
10/13/1991CA2040081A1 Acylation of alkyl aromatic hydrocarbons
10/10/1991DE4010930A1 Verfahren zur herstellung einer alkali- und/oder erdalkalihaltigen aluminiumtriformiatloesung, hochkonzentrierte alkali- und/oder erdalkalihaltige aluminiumtriformiatloesungen und ihre verwendung Process for the preparation of alkali and / or alkaline earth aluminum triformate highly concentrated alkali and / or alkaline earth aluminum triformate and their use
10/09/1991EP0450621A2 Process for the preparation of high-purity 2,6 naphthalenedicarboxylic acid esters
10/09/1991EP0450596A2 Process for producing unsaturated aldehydes and unsaturated acids
10/09/1991EP0450577A1 Nitrile-accelerated hydrocarboxylation
10/09/1991EP0253837B1 Catalytic method for producing fluoroaromatic compounds using branched alkyl pyridinium salts
10/09/1991CN1055175A Benzocycloalkenecarboxylic acid and process for its prepn.
10/09/1991CN1014244B Prepn. of symmetry (s)-gluceraldehyde acelonide
10/09/1991CN1014236B Substituted phenyl alpha-fluoroacrylates
10/08/1991US5055613 Metabolites of pentanedioic acid derivatives
10/08/1991US5055612 Process for the preparation of naphthalene carboxylic acids
10/08/1991US5055611 Process for recycling and regenerating carbonylation catalyst used in synthesis of ibuprofen
10/08/1991US5055601 Fluoroepoxides and a process for production thereof
10/08/1991CA1290331C Prostacyclins and pharmaceuticals containing the same
10/07/1991CA2039907A1 Attrition resistant catalytic system and application to the saturated carboxylic acid oxydehydrogenation, particularly in entrained bed reactors
10/02/1991EP0448797A2 Process for producing alpha-hydroxyisobutyric acid
10/02/1991EP0448580A1 Lead/alkaline earth complexes, process for producing them and their use as stabilizers for plastics
10/02/1991CN1054972A Method for production of acrylic acid
10/02/1991CN1014147B Improved process for preparing tetrafluorobenzoic acids
10/02/1991CN1014146B Carbonylation process improvement
10/02/1991CN1014145B Purification of terephthalic acid
10/02/1991CN1014119B Mo, fe and bi -contg. catalyst for oxidation of olefin or tertiary alcohol to product corresponding unsaturated aldehyde or carboxylic acids
10/01/1991US5053535 Process for producing α-hydroxyisobutyric acid
10/01/1991US5053534 Reacting precongigated fatty acid with acrylic acid; heating; catalyst-free
10/01/1991US5053533 Continuous processing of 1-chloro-2-methoxy-napthalene under Friedel-Craft conditions, without isolation/purification of chemical intermediate
10/01/1991CA1289730C Phase transfer catalysis
09/1991
09/30/1991WO1991014672A1 Chiral catalysts for enantioselective synthesis
09/28/1991WO1991014671A1 New benzocycloalkene carboxylic acid and process for producing it
09/28/1991CA2055602A1 Benzocycloalkenecarboxylic acid and process for it's preparation
09/26/1991DE4009505A1 Verfahren zur herstellung verzweigter fettsaeuren und deren ester A process for producing branched fatty acids and esters
09/25/1991EP0422162A4 Process for preparing sodium phenylpyruvate from calcium phenylpyruvate
09/25/1991CN1054726A Catalyst for producing phthalic anhydride
09/24/1991WO1991014500A1 Ceramic materials, method of preparing the same and hydrogenation and oxidation processes using the same
09/24/1991US5051526 Reagents for solid phase synthesis of polypeptides
09/24/1991CA2078881A1 Ceramic materials, method of preparing the same and hydrogenation and oxidation processes using the same
09/24/1991CA1289573C Synthesis of high purity 5-chloroisophthaloyl chloride
09/19/1991WO1991013856A1 Process for producing methacrylic acid
09/19/1991DE4007665C1 Calcium formate prodn. - by reacting methyl formate and calcium hydroxide in aq. suspension, using specified wt. ratio of calcium hydroxide to water
09/18/1991EP0447267A1 Catalyst for producing phthalic anhydride
09/18/1991EP0447033A1 Maleic anhydride catalysts and process for their manufacture
09/18/1991EP0446644A1 Process for preparing a catalyst, the catalyst and its use
09/18/1991EP0446211A1 Process for preparing polymeric dispersants having alternating polyalkylene aud succinic groups.
09/18/1991CN1054584A Chlorobenzyl carbonylation making phenyl acetate method
09/17/1991US5049682 Process for the preparation of halophthalic anhydrides
09/17/1991US5049497 Novel process for the synthesis of the enantiomers of bicyclo(4.2.0)oct-2-en-7-one and derivatives
09/17/1991US5049455 Amphiphilic anthracene derivative
09/17/1991US5048601 Shell-and-tube apparatus having an intermediate tube plate
09/17/1991CA1289150C Process for the production of aromatic carboxylic acids
09/11/1991EP0445843A2 Process for the preparation of cyclopropanecarboxylic acid derivatives substituted at position 3 by a saturated halogenated chain
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