| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
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| 03/08/2000 | EP0871527A4 Thermally-managed separation and dewatering processes for recovering acid products |
| 03/08/2000 | EP0827494B1 Compositions of enantiomeric diacyl tartaric anhydrides and preparation thereof |
| 03/08/2000 | CN1246842A Heterogeneous vapor phase carbonylation process |
| 03/08/2000 | CN1050119C Alkaline earth metal salts, transition metal salts and transition metal complexes of ketocarboxylic acids as corrosion inhibitors |
| 03/08/2000 | CN1050118C Process for producing highly purified benzendicarboxylic acid isomers |
| 03/08/2000 | CN1050117C Method for separation and preparation of maleic-15-tetracosenoic acid |
| 03/07/2000 | US6034270 Process for the selective preparation of acetic acid using a molybdenum, palladium, and rhenium catalyst |
| 03/07/2000 | US6034269 Catalytic liquid phase oxidation of corresponding compound;terephthalic acid from xylene |
| 03/07/2000 | US6033465 Colorants and colorant modifiers |
| 03/02/2000 | WO2000011008A1 Asymmetric catalysis based on chiral phospholanes |
| 03/02/2000 | WO2000010963A1 Substituted cinnamic acids and cinnamic acid esters |
| 03/02/2000 | WO2000010962A1 Chromium l-threonate, process for preparation of the same and their use |
| 03/02/2000 | WO2000010961A1 Method for producing acrolein and/or acrylic acid from propane |
| 03/02/2000 | WO2000010960A1 Method for producing acrolein and/or acrylic acid from propane |
| 03/02/2000 | WO2000010959A1 Method for making methacrylic acid from methacrolein by redox reaction |
| 03/02/2000 | WO2000010957A1 Method for producing acrolein and/or acrylic acid from propane |
| 03/02/2000 | DE19909923A1 Production of acrylic acid useful as intermediate e.g. for polymer dispersion, uses N-oxyl radicals in aqueous solution as only polymerization inhibitor in separation of gas phase oxidation product |
| 03/02/2000 | DE19839782A1 Metallic reactor tube, useful for the production of (meth)acrolein and/or (meth)acrylic acid by catalytic gas-phase oxidation of alkane or alkene etc. |
| 03/02/2000 | DE19839001A1 Schalenkatalysatoren für die katalytische Gasphasenoxidation von aromatischen Kohlenwasserstoffen Coated catalysts for the catalytic gas-phase oxidation of aromatic hydrocarbons |
| 03/02/2000 | DE19838845A1 Purification of acrylic acid, used e.g. in polymer production, involves crystallization from mixture with solvent of higher boiling solvent, preferably used as absorbent for gas from catalytic oxidation |
| 03/02/2000 | DE19838817A1 Verfahren zur kontinuierlichen Gewinnung von (Meth)acrylsäure A process for the continuous recovery of (meth) acrylic acid |
| 03/02/2000 | DE19838795A1 Verfahren zur kontinuierlichen Gewinnung von (Meth)acrylsäure A process for the continuous recovery of (meth) acrylic acid |
| 03/02/2000 | DE19838783A1 Verfahren zur kontinuierlichen Gewinnung von (Meth)acrylsäure A process for the continuous recovery of (meth) acrylic acid |
| 03/02/2000 | CA2340943A1 Asymmetric catalysis based on chiral phospholanes |
| 03/02/2000 | CA2340738A1 Substituted cinnamic acids and cinnamic acid esters |
| 03/01/2000 | EP0982289A2 Process for the continuous isolation of (meth)acrylic acid |
| 03/01/2000 | EP0982288A2 Process for the continuous purification of (meth)acrylic acid |
| 03/01/2000 | EP0982287A1 Process for the continuous recovery of (meth)acrylic acid |
| 03/01/2000 | CN1246115A Process for preparation of carboxylic anhydride |
| 03/01/2000 | CN1246107A Method for preparing oxy-diphthalic anhydrides |
| 03/01/2000 | CN1246106A Functionalized oligomer mixture derived from cyclopentene, method for production and use thereof |
| 03/01/2000 | CN1245793A Production method of pyromellitic acid |
| 03/01/2000 | CN1049889C Process for coproducing methyl dichloroacetate and mercaptoacetic acid |
| 02/29/2000 | US6031129 Use of pentavalent group VA oxides in acetic acid processing |
| 02/29/2000 | US6031128 Process for manufacturing terephthalic acid |
| 02/29/2000 | US6030920 Catalysts for producing acetic acid from ethane oxidation, processes of making same and method of using same |
| 02/24/2000 | WO2000009468A1 Method for recovering methyl acetate and residual acetic acid in the production of pure terephthalic acid |
| 02/24/2000 | WO2000009262A1 Wells-dawson type heteropolyacids, their preparation and use as oxidation catalysts |
| 02/24/2000 | WO2000009260A1 Molybdenum-vanadium based catalyst for low temperature selective oxidation of propylene, methods of making and using the same |
| 02/24/2000 | WO2000009253A1 Reactor comprising a contact tube bundle |
| 02/24/2000 | DE19837520A1 Production of acrolein and/or acrylic acid involves two stage catalytic oxydehydrogenation of propane, using air as the oxygen source and removing nitrogen before the propene oxidation stage |
| 02/24/2000 | DE19837519A1 Production of acrolein and/or acrylic acid involves two stage catalytic oxydehydrogenation of propane, using air as the oxygen source and removing nitrogen from residual gas before recycling |
| 02/24/2000 | DE19837518A1 Production of acrolein and/or acrylic acid involves two stage catalytic oxydehydrogenation of propane, using modified air with less nitrogen and more oxygen than normal air as the oxygen source |
| 02/24/2000 | DE19837517A1 Production of acrolein and/or acrylic acid involves two stage catalytic oxydehydrogenation of propane, using modified air with less nitrogen and more oxygen than normal air as the oxygen source |
| 02/24/2000 | CA2337870A1 Wells-dawson type heteropolyacids, their preparation and use as oxidation catalysts |
| 02/23/2000 | EP0980350A2 Hydroxynaphthoic acids and derivatives |
| 02/23/2000 | EP0980289A1 Process for preparing carboxylic acid salts and catalysts useful in such process |
| 02/23/2000 | CN1245482A Method of recovery of terephthalic acid and ethylene glycol from poly/ethylene terephthalate/wastes |
| 02/23/2000 | CN1245161A Process for preparing chromium L-threonate, its preparing process and application |
| 02/23/2000 | CN1245160A Process for separating and recovering naphthenic acid from fractional oil of petroleum |
| 02/23/2000 | CN1049650C Synthetic method of phenyl-pyruvic alkali salt and ammonium salt |
| 02/23/2000 | CN1049649C Method of removing iodine compounds from crude acetic anhydride or mixture of crude acetic hydride and crude acetic acid |
| 02/23/2000 | CN1049648C Method for producing aliphatic dicarboxylic acid from hydroxycarbonlation of lactone |
| 02/22/2000 | US6028221 Catalytic oxidation in presence of an oxidation catalysts |
| 02/22/2000 | US6028220 Producing acrolein and acrylic acid using a supported dual activity molybdenum, iron, and bismuth based catalyst in a fixed bed multitubular reactor |
| 02/22/2000 | US6028218 Agitating and heating at least about 275.degree. c. to melt an alkali metal aryloxide, then carboxylation with carbon dioxide; high speed reaction; useful for the preparation of aromatic hydroxycarboxylic acids chemical intermediates |
| 02/22/2000 | US6028217 Chemical intermediate for renin inhibitor or enkephalinase enzyme inhibitor |
| 02/22/2000 | US6028211 Composition and method for reducing fouling in process equipment used for manufacturing aromatic materials |
| 02/22/2000 | US6026656 Crystallization by evaporation and vapor condensation |
| 02/17/2000 | WO2000008031A1 Novel phospholipids with unsaturated alkyl and acyl chains |
| 02/17/2000 | WO2000007973A1 Method for producing sorbic acid and sorbic acid esters or derivatives thereof |
| 02/17/2000 | WO2000007970A1 Improved process for producing pure carboxylic acids |
| 02/17/2000 | WO2000007964A1 Method for oxidizing hydrocarbons |
| 02/17/2000 | DE19836792A1 Tube bundle reactor, for oxidation reactions, has partitioned headers allowing heat exchange medium supply to the lower header to be combined with co-current passage within the reactor |
| 02/17/2000 | DE19836367A1 Isolating pure anhydrous 2-6C carboxylic acid, especially (meth)acrylic acid for polymer production, involves complexing from the gas phase with high-boiling amine followed by thermal cleavage of the complex |
| 02/17/2000 | DE19835783A1 Verfahren zur Herstellung von Sorbinsäure und Sorbinsäureestern oder deren Derivaten A process for producing sorbic acid and sorbic acid esters or derivatives thereof |
| 02/17/2000 | DE19835481A1 Verfahren zur Oxidation von Kohlenwasserstoffen A process for the oxidation of hydrocarbons |
| 02/17/2000 | CA2339769A1 Method for oxidizing hydrocarbons |
| 02/17/2000 | CA2339736A1 Method for producing sorbic acid and sorbic acid esters or derivatives thereof |
| 02/16/2000 | EP0979813A1 Production process for acrylic acid |
| 02/16/2000 | EP0979223A1 Method for producing acetic acid in a reactor cascade |
| 02/16/2000 | EP0979222A1 Process and catalyst for preparing acetic acid by catalytic oxidation of ethane |
| 02/16/2000 | CN1244856A Process for preparing acetic acid |
| 02/16/2000 | CN1244853A Methods for preparing an intermediate oxidation product from a hydrocarbon by utilizing an activated initiator |
| 02/16/2000 | CN1244519A Method for producing propenoic acid |
| 02/16/2000 | CN1049438C Organometallic fluorenyl compounds and method for polymerising olefine by using said compound |
| 02/16/2000 | CN1049424C Process and apparatus for producing terephthalic acid |
| 02/16/2000 | CN1049422C Process for producing carboxylic acid anhydrides |
| 02/16/2000 | CN1049421C Absolute trifluoro acetate and absolute trifluoro acetic acid prepn. |
| 02/15/2000 | US6025523 Process for the manufacture of acrylic acid from acrolein by a redox reaction and use of a solid mixed oxide composition as redox system in the said reaction |
| 02/15/2000 | US6025295 Supported catalysts |
| 02/15/2000 | CA2164912C Process for recovering the light noble products present in the distillation residues of processes used to prepare acrylic acid and its esters |
| 02/15/2000 | CA2164591C Process for recycling polyesters |
| 02/15/2000 | CA2022037C Improved carboxylic acid purification and crystallization process |
| 02/10/2000 | WO2000006530A1 A process for producing terephthalic acid and/or dimethyl terephthalate |
| 02/10/2000 | WO2000006528A1 Process for producing adipic acid |
| 02/10/2000 | DE19924760A1 Verfahren zur Behandlung natürlicher Fettsäuren und deren Verwendung A process for treating natural fatty acids and the use thereof |
| 02/10/2000 | DE19835611A1 Neuartige Phospholipide mit synthetischen, ungesättigten Alkyl- und Acylketten Novel synthetic phospholipids with unsaturated alkyl and acyl chains |
| 02/10/2000 | DE19835359A1 Verfahren zur Herstellung von 4-(4'-Chlorbiphenyl-4-yl)-4-keto-2-methylenbuttersäure Process for the preparation of 4- (4'-chlorobiphenyl-4-yl) -4-keto-2-methyl butyric acid |
| 02/10/2000 | CA2338656A1 A process for producing terephthalic acid and/or dimethyl terephthalate |
| 02/09/2000 | EP0978501A1 Acetic acid reactive distillation process based on dme/methanol carbonylation |
| 02/09/2000 | EP0978500A1 Process for the preparation of 4-(4'-chlorobiphenyl-4-yl)-4-keto-2-methylenbutyric acid |
| 02/09/2000 | EP0978303A1 Dewatering processes for recovering acid products |
| 02/09/2000 | EP0977729A1 3-cyano-2,4,5-trifluoro-benzoyl fluoride and intermediate products for the production thereof |
| 02/09/2000 | EP0977724A1 Process for chiral enrichment of optically active carboxylic acids, or salts or esters thereof |
| 02/09/2000 | EP0977723A1 Process for the preparation of trifluoroethoxyarenecarboxylic acids |
| 02/09/2000 | EP0833810B1 Difluorochloracetyl chloride and dichloracetyl chloride preparation |
| 02/09/2000 | CN1244188A Production of fatty acid methyl esters and soap therefrom |
| 02/09/2000 | CN1243821A Compounds containing fluorine carboxylic acid, their production and chemical uses |
| 02/09/2000 | CN1243820A Method for producing aromatic carboxylic acid |