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)
01/1992
01/14/1992US5081150 Calcium lactate-glycerol adduct, a process for its preparation
01/14/1992US5080280 Folded sleeve
01/14/1992CA1294284C 3-demethylmevalonic acid derivatives, a process for their preparation, pharmaceutical products based on these compounds, their use and intermediates
01/08/1992EP0465100A1 Process for producing high purity isophthalic acid
01/08/1992EP0464629A2 Method of producing naphthalenedicarboxylic acids and diaryldicarboxylic acids
01/08/1992EP0464471A2 Partially fluorinated dicarboxylic acid and its acid chloride, process for preparing it and use thereof
01/08/1992EP0464154A1 Alkylation of aromatics.
01/07/1992US5078906 Organic lithium-potassium complexes for metallization reactions, preparation of aspirin substitutes, fenoprofen
01/02/1992EP0463988A2 Process for concentrating or separating mixtures of organic compounds
01/02/1992EP0463556A2 Partially fluorinated tetracarboxylic acid and its dianhydride, process for preparing it and its use
12/1991
12/31/1991US5077434 Process for production of acrylic acid
12/31/1991US5077433 Reacing carbon monoxide, water and diacyloxylated butene in th e presence of palladium and quaternary onium chloride
12/31/1991US5077425 Nitrile-accelerated hydrocarboxylation
12/31/1991CA1293739C Process for preparing 2,2,3-trifluoropropionyl fluoride
12/27/1991EP0462776A2 Preparation of optically active arylaliphatic carboxylic acids
12/27/1991EP0462244A1 A process for preparing oxalic acid
12/26/1991WO1991019691A1 Process for producing metal soaps
12/25/1991CN1057255A Lltilization of tala powder for producing gallic acid
12/24/1991US5075496 Manufacture of 2,6-hydroxynaphthoic acid
12/24/1991US5075494 Reacting 2,2-difluoro-1-methylcyclopropyl compound with haloge n, converting to acid chloride, esterifying, dehalogenating
12/24/1991US5075336 Osteoporosis therapy
12/24/1991US5075233 Process for the preparation of 2-aryloxypropionic acids
12/24/1991CA1293419C Ether carboxylate detergent builders and process for their preparation
12/20/1991CA2044719A1 Process for the enrichment or separation of organic substance mixtures
12/19/1991CA2043649A1 Preparation of optically active aliphatic carboxylic acids
12/18/1991EP0461802A2 Carbonylation of methanol
12/18/1991EP0461541A2 Process for the resolution of 2,2-dimethylcyclopropane carboxylic acid racemate
12/18/1991EP0461322A1 Method for the manufacture of hydroxy aromatic monocarboxylic acids
12/18/1991EP0461128A1 Heterogeneous catalyst, process for producing it and its use
12/18/1991CN1015104B Deprotection of allylic esters and ethers
12/17/1991US5073573 Thixotropy, complex of magnesium aluminum hydroxide and a carb oxylic acid, lipohlilic liquid
12/17/1991US5073360 Bridge/lamellar metallic oxides
12/17/1991CA1293262C2 Process for tetrafluorobenzoic acid
12/15/1991WO1991019692A2 Calcium citrate malate composition
12/15/1991CA2044570A1 Process for resolution of racemates of 2,2-dimethylcyclopropanecarboxylic acid
12/13/1991CA2044224A1 Carbonylation of methanol
12/12/1991WO1991018864A1 Process for the recovery of a lower aliphatic acid
12/12/1991WO1991018863A1 Process for the recovery of aliphatic acids and sugars
12/12/1991WO1991018860A1 Process for producing ketone compounds
12/11/1991EP0460917A2 Method of producing eicosapentaenoic acid or an ester derivative thereof
12/11/1991EP0460905A2 Improved method for producing ibuprofen
12/11/1991EP0460854A1 Production of citric acid
12/11/1991EP0460687A2 Process for the preparation of oxydiphthalic anhydride and acyloxyphthalic anhydrides
12/11/1991EP0460339A1 Process & apparatus for the removal of undesired components from aqueous feedstocks
12/11/1991EP0460240A1 Catalyst for hydrogenation, dehydrosilylation or hydrosilylation, and its use
12/11/1991EP0452411A4 Acid catalyzed process
12/10/1991US5072054 Alkylating phenolic compound with olefin, alcohol, or alkyl ha lide using synthetic porous crystalline catalyst having specif ic X-ray diffraction pattern
12/10/1991US5072038 Chemical intermediates for bactericides
12/10/1991US5072037 Aldol condensation, hydrogenation, dehydration, hydroformylati on, oxidation; purity, by-product inhibition, pollution contro l
12/10/1991US5072036 Process for preparing para-hydroxybenzoic acid
12/10/1991US5072030 Process for the fluorination of acrylic acid and derivatives thereof and novel fluorinated esters of 2,3-difluoropropionic acid
12/10/1991US5072003 Acid anhydrides and dianhydrides of disubstituted maleic anhydrides
12/10/1991US5071919 Lower olefin aliphatic polymer with adidic unsaturated reactant
12/10/1991US5071560 Process for purifying phenylalanine
12/10/1991CA1292997C Preparation process of cinnamic acids
12/10/1991CA1292996C Process for the preparation of 4-(2'-chloroethyl)- benzoic acid
12/09/1991CA2044110A1 Process for the preparation of oxydiphthalic anhydride and acyloxyphthali anhydrides
12/04/1991EP0459543A1 Process of recovery of maleic anhydride from reaction gaseous mixtures
12/04/1991EP0459258A2 Process for the preparation of olefinic and acetylenic compounds
12/04/1991EP0458965A1 Process for the preparation of vinyl ethers.
12/03/1991US5070103 Naphthalene derivatives and composition and methods of use, and aldehyde intermediates
12/03/1991US5070061 Isobutyric acid to methacrylic acid
12/03/1991US5070060 Oxidation of butane to maleic anhydride
12/03/1991US5069687 Process of recovery of maleic anhydride from reaction gaseous mixtures
12/03/1991CA1292720C Obtaining very pure maleic anhydride from crude maleic anhydride
12/03/1991CA1292710C Fluorescent labels
11/1991
11/28/1991WO1991017824A1 Activation of noble metal catalysts for use in hydrodehalogenation of halogen-substituted hydrocarbons containing fluorine and at least one other halogen
11/27/1991EP0458541A1 Improved phosphorous/vanadium oxidation catalyst
11/27/1991EP0268616B1 Composition of matter containing potassium acetylsalicylate and useful for producing solutions of potassium acetylsalicylate, and process for preparation
11/27/1991CN1056487A Process for preparing 2,2-dimethyl-5-(2,5-dimethyl phenoxy) pentanoic acid
11/26/1991US5068448 Process for the production of 4'-isobutylacetophenone
11/26/1991US5068421 Reaction of maleic acid and malic acid in the presence of calcium ions catalysts to precipitate salts of oxydisuccinic acid
11/26/1991US5068420 Purification by basification, solvent extraction and separation
11/26/1991US5068419 Separation of an organic acid from a fermentation broth with an anionic polymeric adsorbent
11/26/1991US5068418 Using anionic exchange resin
11/26/1991US5068417 Hydrolysis of glyoxylic acid hemiacetals to form glyoxylic acid
11/26/1991US5068415 Process for the preparation of halogenotetrafluoropropionic acid
11/26/1991US5068411 Trifluorobenzene compounds and process for producing the same
11/26/1991US5068410 Process for producing highly pure 2,6-naphthalene dicarboxylic acid
11/26/1991US5068408 Oxidation of alcohols, thiols, sulfides, aldehydes, amines, ketones, acids, amides, ethers, esters and activated carbon-carb on double bonds
11/26/1991US5068407 Oxidation of tertiary-alkyl substituted aromatics
11/26/1991US5068406 Forming carboxylic acids by oxidation of alkylaromatics
11/26/1991US5068374 Method for the preparation of anhydrous tin-dicarboxylate-dihalides
11/26/1991US5068373 Oxidation and forming salts with acetic anhydride
11/26/1991US5068366 Simultaneous epoxide and carboxylic acid manufacture by co-oxidation in the presence of a cobalt catalyst
11/26/1991US5068339 Enhanced chemiluminescence from 1,2-dioxetanes through energy transfer to tethered fluorescers
11/26/1991CA1292475C Process for the selective preparation of alkenecarboxylic acid derivatives
11/21/1991EP0457725A2 Process for the preparation of 2,3-dibromopropionyl chloride
11/21/1991EP0457606A1 Process for producing highly pure isophthalic acid
11/21/1991EP0457599A2 Substituted acylating agents and their production
11/21/1991EP0456837A1 Process for producing methacrolein and methacrylic acid
11/21/1991DE4015729A1 Highly pure crystalline sodium formate prepn. - by treating sodium formate crystals prepd. from carbon mon:oxide and sodium hydroxide with methanoic acid
11/20/1991CN1056301A Recovery of acrylic acid and/or ethyl acrylate from black acid
11/20/1991CN1056300A Process for preparing carboxylic acids
11/19/1991US5066815 Asymmetric hydrogenation of ketone, ruthenium-phosphine catalyst
11/19/1991US5066427 Eicosatriynoic acid esters and their application in pharmaceutical and cosmetic practice
11/19/1991CA1292243C Process for the oxidation aldoses, catalyst used in said process and products thus obtained
11/13/1991EP0455906A1 Recovery of acrylic acid and/or ethyl acrylate from black acid
11/13/1991EP0455802A1 Process for the production of aromatic anhydrides and aromatic esters with superior color properties.
11/13/1991CN1056098A Process for preparing double oxalate of rare earth ammonium and use in preparation of rare earth oxide, obtaining double oxalate and oxide
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