Patents
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Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144)
12/1989
12/13/1989EP0345475A1 Process for the production of quaternary ammonium salts of long-chain aliphatic carboxylic acids
12/13/1989CN1037892A Productive technology of oxalic acid
12/12/1989US4886907 Polysubstituted derivatives of naphthalene, their process of preparation and their application in the cosmetic and pharmaceutical fields
12/12/1989US4886906 Process for producing 2,6-naphthalene dicarboxylic acid
12/12/1989US4886905 Hydrogenation of acetic anhydride; ruthenium catalyst, methyl iodide and lithium iodide
12/12/1989US4886900 Tetrakis(3-(3,5-di-tert.buyl-4-hydroxyphenyl)propionyl-oxymethyl) methane with amorphous structure, process for its preparation and its use as a stabilizer
12/12/1989US4886891 Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative
12/12/1989US4886879 Process for the preparation of trifluorodichloroethyl-substituted acids and zinc compounds
12/12/1989US4886788 Cyclodextrin clathrates of carbacyclin derivatives and their use as medicinal agents
12/12/1989CA1263870A1 Preparation of trifluoroacetyl chloride
12/12/1989CA1263869A1 PROCESS FOR PREPARING .alpha.-HYDROXYACIDS
12/07/1989DE3818761A1 Process for the preparation of trans-3-(4,4-dichloro-1,3-butadienyl)-2,2-dimethylcyclopropanecarboxyl ic acid and its derivatives, and novel derivatives of this acid
12/06/1989EP0345243A2 Asymmetric hydrogenolysis of epoxides
12/06/1989EP0345083A2 Process for recovering methacrolein
12/06/1989EP0344737A1 Process for purifying alpha-substituted acetic acids
12/05/1989US4885419 1,2-Di(4-isobutylphenyl)hydrocarbon and its preparation and uses as intermediate
12/05/1989US4885404 High yields
12/05/1989US4885386 Process for the synthesis of 3-chloro-2,4,5-trifluorobenzoic acid
12/05/1989US4885384 Using palladium catalyst and bronsted base
12/05/1989CA1263669A1 Process for the preparation of anhydrous and crystaline alkaline salts of trifluoroacetic acid
11/1989
11/30/1989WO1989011521A1 Process for preparing polyunsaturated fatty acids
11/30/1989WO1989011470A1 Dihalogeno-3,3 fluoro-2 propenols-1, preparation method and utilization for the synthesis of fluoro-2 acrylic and dihalogeno-3,3 fluoro-2 acrylic acids and their derivatives
11/30/1989WO1989011323A1 Process for recovering crystals from slurry
11/29/1989EP0343991A2 Process for production of aromatic polycarboxylic acids
11/29/1989EP0343441A2 Fluorinated bis-aryloxy-substituted alkenes, method for their production an their application
11/29/1989CN1037503A Process for obtaining enantiomers of 2-arylpropionic acids
11/28/1989US4883916 Anticholesterol, antiarterioscelerosis
11/28/1989US4883912 Solvent extraction, salt formation, tertiary amine, oxygen containing solvent, sulfuric acid
11/28/1989US4883910 Oxidation of organics by a vanadium containing heteropolyanion compound
11/28/1989US4883887 Sulfone polyene intermediates
11/28/1989CA1263398A1 2-amino-3-ethoxycarbonylamino-6-(p-fluoro- benzylamino)-pyridine gluconate, process for its production and pharmaceutical preparations containing it
11/28/1989CA1263382A1 Carbacyclins, processes for their production and their use as medicinal agents
11/28/1989CA1263365A1 Catalyst recovery process
11/23/1989EP0342843A1 Process for preparing racemic dihalovinylcyclopropane carboxylic acid halides
11/23/1989EP0342310A1 Composition containing divalent manganese ion and method for preparing the same
11/22/1989CN1037329A Method using diluted nitric acid as oxidant to produce oxalic acid
11/21/1989CA1263122A1 Process for the carbonylation of allenically unsaturated compounds
11/21/1989CA1263121A1 Process for the carbonylation of acetylenically unsaturated compounds
11/16/1989DE3914067A1 Reinigung von 2-keto-l-gulonsaeure Purification of 2-keto-L-gulonic acid
11/15/1989EP0341813A1 Reactor and Process for the oxidation of alkyl aromatic compounds to aromatic carboxylic acids.
11/15/1989EP0341594A2 Process for the preparation of a 1,4-dioxane adduct of 2-hydroxy-naphthalene-6-carboxylic acid and use of said adduct
11/15/1989EP0341551A1 Alkenoic acid derivatives
11/15/1989CN1037171A Improved process for making malate salts and thereby. malic acid or 2,2'oxodixuccinates
11/15/1989CN1037096A Activation process of cis-anhydride vanadium-phosphorus-oxygen series catalyst made from the oxidation of n-butane
11/14/1989US4880894 Quaternary ammonium salts used as phase transfer catalyst
11/14/1989US4880576 Halogenation of acids, formamide catalysts
11/08/1989EP0341099A1 Method of preparing alkali phenylpyruvate
11/08/1989EP0340985A1 Process for preparing trans-2,2-dimethyl-3-(2,2-dihalovinyl)-cyclopropane carboxylic acid halide
11/08/1989EP0340740A2 Perfluoropolyethers containing a halogen different from fluorine and having an acid end group
11/08/1989EP0340706A2 Process for the preparation of carboxylic-acid chlorides
11/08/1989EP0340663A2 Process for the obtention of enantiomers of 2-arylpropionic acids
11/08/1989EP0185080B1 Alpha-, omega-dicarboxylic acids, process for their preparation and medicines composed thereof
11/08/1989EP0182872B1 A process for the preparation of cyclobutene-substituted aromatic hydrocarbons
11/08/1989CN1037026A Seal for rotatable shaft
11/08/1989CN1036948A Method for reactivating group viii noble metal catalyst for use in purification of crude terephthalic acid
11/08/1989CN1036947A Process for preparing carboxylic acids
11/08/1989CN1005685B Catalysts for oxidation and the process for production thereof
11/07/1989USRE33109 Chalcone derivatives
11/07/1989US4879412 Purification process of methacrylic acid
11/07/1989US4879394 Reaction of olefins with maleic anhydride
11/07/1989US4879389 Hydrogenation catalysts
11/07/1989US4879387 Catalytic oxidation, naphthalene, o-xylene, titanium dioxide, vanadium pentoxide, cesium compound
11/07/1989US4879368 Polyxylylenes; carbonless copying
11/07/1989US4879284 Naphthalene derivatives having retinoid type action, the process for preparation thereof and medicinal and cosmetic compositions containing them
11/07/1989US4879070 Hydrogen, carbon dioxide, tertiary amine, rhodium-organophosphorus catalyst
11/07/1989EP0297137A4 Deicing compositions comprising alkaline earth or alkali metal carboxylates and processes for their production.
11/07/1989CA1262718A1 Process for the production of catalytically-active metallic glasses
11/02/1989WO1989010343A1 Process for inhibiting the polymerization of acid monomers
11/02/1989EP0339815A2 Process for the preparation of pure cis-cyclopropane carboxylic acids and intermediates therefor
11/02/1989EP0339618A2 Method for preparing optically active 3,4-dihydroxy butyric acid derivatives
11/02/1989EP0339455A2 Process for preparing biaryl compounds
11/02/1989EP0112394B1 Process for preparing angelic acid or its ester
11/02/1989DE3911951A1 Selective catalytic gas phase chlorination of phthalic acid derivatives
11/02/1989DE3811067C1 Process for the preparation of 4,4'-bis(carboxybenzoyl)diphenyl ethers
11/01/1989CN1036756A Method and apparatus for increasing yield and product quality while reducing power costs in oxidation of aromatic alkyl to aromatic carboxylic acid
10/1989
10/31/1989US4877900 Process for preparing terephthalic acid of high quality
10/31/1989US4877789 Antiallergens, antiinflammatory agents; skin disorders
10/31/1989US4877490 Dehydration of formic acid by extractive distillation with dicarboxylic acids
10/31/1989CA1262552A1 LONG-CHAIN .alpha.,.omega.-DICARBOXYLIC ACIDS AND DERIVATIVES THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM
10/26/1989DE3813124A1 Distillable buffer solutions and their uses
10/26/1989DE3812183A1 Process for recovering a dissolved ionic substance
10/25/1989EP0338852A1 Process for the carbonylation of arylalkyl halides
10/25/1989EP0338730A1 Carbonylation of allylic alcohols
10/25/1989EP0338499A2 Stabilized highly unsaturated fatty acids and derivatives of such acids
10/25/1989EP0338215A2 Process for the preparation of halogen-substituted phthalic anhydride
10/25/1989EP0338088A1 PROCESS FOR PREPARING p-HYDROXYBENZOIC ACID
10/24/1989US4876387 Forming amine salt of 4,5-difluoroanthranilic acid, diazotization, decomposition
10/24/1989US4876385 Batch or semicontinuous pseudocumene oxidation and catalyst recovery and recycle
10/24/1989US4876381 Naphthalene derivatives possessing a retinoid-type action, processes for their preparation, and medicinal and cosmetic compositions containing these derivatives
10/19/1989WO1989009761A1 Process for preparation of an oxyacetic acid/hydroxyethyl ether compound
10/18/1989EP0337803A1 Catalyst recycle in the carbonylation of isobutylphenylethanol to ibuprofen
10/18/1989EP0337262A1 Process for the recovery and recycling of nickel, cobalt and rhodium from mixtures comprising aliphatic carboxylic acids
10/18/1989EP0337246A1 Process for preparing pyruvate
10/18/1989EP0337210A1 Process for the preparation of carboxylic-acid halides
10/18/1989EP0336996A1 Improved process for the carbonylation of propylene
10/18/1989EP0206054B1 Method for the production of carboxylic acids
10/17/1989USRE33095 Magnesium calcium acetate products, and process for their manufacture
10/17/1989US4874892 Process for the preparation of 6-hydroxynaphthalene-1-carboxylic from 1-aminomethylnaphthalene-6-sulphonic acid
10/17/1989US4874777 Antiasthmatics
10/17/1989US4874752 Benzoquinone derivatives and production thereof
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