| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
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| 03/06/2003 | US20030045750 Treating with sulfuric acid to form an aqueous phase and an organic phase, separation, oxidizing to form dicarboxylic acid, then esterification, purifying by distillation; waste recycling |
| 03/06/2003 | US20030045749 Recovering the steam from heat generated in the reaction process, recycling to use as thermal energy, dynamic energy, and electrical energy; exothermic reactions |
| 03/06/2003 | US20030045748 One step etherification in a basic environment and in an aqueous or aqueous/organic biphasic solvent, by reacting with an alkyl chloride; intermediates for pharmaceutical syntheses, in agrarian chemistry, in dyes, fragrances |
| 03/06/2003 | US20030044944 Method for the preparation of lactic acid and calcium sulphate dihydrate |
| 03/06/2003 | CA2458616A1 Aromatic and heteroaromatic acid halides for synthesizing polyamides |
| 03/06/2003 | CA2458194A1 Linear compounds containing phenolic and salicylic units |
| 03/05/2003 | EP1286945A1 Integrated process for the production of vinyl acetate |
| 03/05/2003 | EP1286943A1 Method for discontinuous purification of crude acrylic acid by means of crystallization |
| 03/05/2003 | EP1286942A1 Method for the selective production of acetic acid by catalytic oxidation of ethane and/or ethylene |
| 03/05/2003 | EP1286763A2 Counterflow reactor with a bundle of contact tubes |
| 03/05/2003 | EP1082317B1 Method for producing phthalic anhydride by means of catalytic vapor-phase oxidation of o-xylol/naphthalene mixtures |
| 03/05/2003 | EP0996611B1 Process for the production of methyl methacrylate |
| 03/05/2003 | CN1400200A Prepn of surfactant containg branched alkyl radical |
| 03/05/2003 | CN1102572C Process for hydrogenating benzoic acid |
| 03/05/2003 | CN1102571C Process for refining long chain binary acid |
| 03/05/2003 | CN1102570C process for preparing low-turbidity euetatandioic acid anhydride |
| 03/05/2003 | CN1102569C Fatty acid isomerisation method |
| 03/04/2003 | US6528683 Method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic hydrocarbons and catalysts obtained in such a manner |
| 03/04/2003 | US6528668 Perfumes |
| 03/04/2003 | US6528663 Transimidation between a substituted n-alkyl phthalimide and a substituted tetrahydrophthalic anhydride |
| 03/04/2003 | CA1341424C Diketohexanoic acids and 2- and 3-diloweralkyl derivatives thereof |
| 02/27/2003 | WO2003016395A1 Polymer dispersible polybasic metal carboxylate complexes |
| 02/27/2003 | WO2003016270A2 Selective estrogen receptor modulators |
| 02/27/2003 | WO2003016268A1 Stabilisation of ethylenically-unsaturated compounds with amidoximes |
| 02/27/2003 | WO2003016253A1 Method for obtaining chemical raw materials from polycondensate and polyaddition compounds |
| 02/27/2003 | WO2003016252A2 Alkyl aromatic aldehydes |
| 02/27/2003 | WO2002083299A3 Palladium catalyst and processes for using the same |
| 02/27/2003 | US20030040642 Method for adjusting concentration of starting materials in gas phase contact reaction process, method for controlling reaction process by the adjusting method, and process for producing lower fatty acid ester using the control method |
| 02/27/2003 | US20030040640 For use as anti- inflammatory analgesics, in therapy of immune disorders, as anti- cancer and anti-tumor agents, and therapy of cardiovascular disease, skin redness, and viral infection |
| 02/27/2003 | US20030040629 Asymmetric catalysis based on chiral phospholanes and hydroxyl phospholanes |
| 02/27/2003 | US20030040570 (Meth)acrylic acid is separated by crystallization in crystal batch A and at least one mother liquor B and crystal batch A and at least one mother liquor B and at least a part of the crystal batch A is removed as pure (meth)acrylic acid |
| 02/27/2003 | US20030040428 Using carbonylation catalyst |
| 02/27/2003 | CA2456440A1 Polymer dispersible polybasic metal carboxylate complexes |
| 02/26/2003 | EP1285907A2 Compositions for the controlled release of an aldehyde together with two carboxylic acids |
| 02/26/2003 | CN1399624A Method for purifying (meth) acrylic monomers by distillation |
| 02/26/2003 | CN1399623A Purification of aqueous solutions of organic acids |
| 02/26/2003 | CN1398844A Nervonic acid extracting and purifying production process |
| 02/26/2003 | CN1398656A Porous plate column without drainage tube |
| 02/26/2003 | CN1102141C Process for purifying 3.5-dimethyl benzoic acid |
| 02/26/2003 | CN1102140C Preparation of acrylic acid and acrylic ester |
| 02/26/2003 | CN1102137C Method for splitting ibuprofen by two-component chiral reagent |
| 02/25/2003 | US6525218 Process for producing sorbic acid |
| 02/25/2003 | US6525217 Method for the catalytic gas-phase oxidation of propene to acrylic acid |
| 02/25/2003 | US6525216 Absorption, refinement; recirculation in vent gas |
| 02/25/2003 | US6525214 Contacting 2-(4-isobutylphenyl)propionic acid of high enantiomorph purity with sodium base; salt formation to form sodium ibuprofen; analgesics, antipyretics, antiinflammatory agents |
| 02/25/2003 | US6525147 Decomposing hydrogen peroxide |
| 02/25/2003 | CA2215251C Industrial preparation of high purity gallic acid |
| 02/25/2003 | CA2123081C Enzymatic preparation of n-(phosphonomethyl) glycine |
| 02/20/2003 | WO2003014172A2 Method for producing water-absorbent resins |
| 02/20/2003 | WO2003014057A1 Processes for producing halogenophenylpyruvic acid and optically active halogenophenylalanine |
| 02/20/2003 | WO2003014056A1 Process for producing optically active 2-substituted carboxylic acid |
| 02/20/2003 | WO2003014055A1 Method of oxidising hydrocarbons to acids |
| 02/20/2003 | WO2003014054A1 Vapor phase carbonylation process using gold catalysts |
| 02/20/2003 | WO2003014053A1 Flexible method for the common production of formic acid, a carboxylic acid having at least two carbon atoms, and/or the derivatives of the same |
| 02/20/2003 | WO2003013721A1 Gold based hererogeneous carbonylation catalysts |
| 02/20/2003 | WO2003013610A2 Surfactant compounds and uses thereof |
| 02/20/2003 | WO2002024623A3 Novel alkanoic acid derivatives |
| 02/20/2003 | US20030036667 Heating aromatic compound substituted with halogen that is exchangeable for fluorine with fluoride and compound such as Diethylaminobis(tetramethylguanidino)sulfonium bromide to produce fluorinated aromatics |
| 02/20/2003 | US20030036664 Waste water treatment in a method for producing formic acid which is free of water |
| 02/20/2003 | US20030036475 Vanadium-phosphorus oxide catalysts with promoter reagents |
| 02/20/2003 | CA2456052A1 Surfactant compounds and uses thereof |
| 02/19/2003 | EP1284254A1 Process for the preparation of dicarbonic acid salts for photographic purposes |
| 02/19/2003 | CN2536587Y Methyl acetate hydrolyzer |
| 02/19/2003 | CN1398251A Process for prepn. of salts of L-carnitine and alkanoyl L-carnitine with mucic acid |
| 02/19/2003 | CN1398249A Perfluoroisopropylbenzene derivatives |
| 02/19/2003 | CN1398200A Phosphor, arsenic and antimony compounds based upon diaryl-anellated bicyclo 2.2.N8cexcl; parent substances and catalysts contg. same |
| 02/19/2003 | CN1397542A Process to enable recemation of optical rotatary vinyl substituted cyclopropane carboxylic compound |
| 02/19/2003 | CN1397534A Process for purifying raw liquid of bamboo vinegar |
| 02/19/2003 | CN1101803C Method for selective prepn. of 2-hydroxybenzoic acid and 4-hydroxybenzaldehyde and derivatives |
| 02/19/2003 | CN1101802C Process for preparing loxoprofen sodium |
| 02/18/2003 | US6521795 Minimizing formation of enantiomer with use of catalyst comprising transition metals with chiral ligands |
| 02/18/2003 | US6521789 Process for the preparation of adipic acid |
| 02/18/2003 | US6521786 Process for the production of aromatic acids |
| 02/18/2003 | US6521784 Process for the preparation of acetic acid or methyl acetate |
| 02/18/2003 | US6521783 Processes for preparing oxygenates |
| 02/18/2003 | US6521769 Chiral phosphines, transition metal complexes thereof and uses thereof in asymmetric reactions |
| 02/18/2003 | US6521199 Hydrogen fluoride(HF); ammonium fluorides used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes are regenerated and reused by reacting with HF in the presence of a liquid carboxylic acid |
| 02/13/2003 | WO2003011842A1 Indane acetic acid derivatives and their use as pharmaceutical agents, intermediates, and method of preparation |
| 02/13/2003 | WO2003011822A2 Solid phase syntheis of salts of organic acid |
| 02/13/2003 | WO2003011818A1 Process for producing acid anhydride |
| 02/13/2003 | WO2003011806A1 Manufacturing process for the preparation of a, a-branched alkane carboxylic acids providing esters with an improved softness |
| 02/13/2003 | WO2003011804A2 Method for producing partial (amm)oxidation products of an olefin |
| 02/13/2003 | WO2003011799A1 Kinetic resolutions of chirat 3- and 3-substituted carboxylic acids |
| 02/13/2003 | WO2003011449A1 Flow reactors for chemical conversions with hetergeneouos catalysts |
| 02/13/2003 | WO2003006157A3 Skeketal isomerization of fatty acids |
| 02/13/2003 | US20030032842 Novel arylpropyl aldehyde derivatives, processes for producing the same, and methods of using the same |
| 02/13/2003 | US20030032841 Solid phase synthesis of salts of organic acid |
| 02/13/2003 | US20030032840 Method of chemical recycling of polyethylene terephthalate waste |
| 02/13/2003 | US20030032839 Chemical intermediate for synthetic pyrethroids |
| 02/13/2003 | US20030032836 Reacting bromodifluoroacetyl halide with oleum |
| 02/13/2003 | US20030032832 Use of diamines and alkanolamines to inhibit unsaturated monomer polymerization |
| 02/13/2003 | US20030032825 Method for purifying azelaic acid |
| 02/13/2003 | US20030032817 Bromination of a 1-ol-gonane-7-one derivative with a source of electrophilic bromine in an etheral solvent, a chlorinated solvent, and acetonitrile |
| 02/13/2003 | US20030032552 Vaporous component comprising a halogen promoter; for producing esters and carboxylic acids from reactants including lower alkyl alcohols, in a vapor phase carbonylation process |
| 02/13/2003 | US20030030193 Sublimating and collecting units independently controllable in temperature by electromagnetic induction heating |
| 02/13/2003 | US20030029712 Azeotropic distillation process for producing organic acids or organic acid amides |
| 02/13/2003 | US20030029711 Mixing a feed stream and at least one azeotroping agent; decomposing the ammonium salt, the amide, or the alkylamine-organic acid complex to produce organic acid producing a first vapor stream; separating |
| 02/13/2003 | CA2753329A1 Indane acetic acid derivatives and their use as pharmaceutical agents, intermediates, and method of preparation |
| 02/13/2003 | CA2456166A1 Kinetic resolutions of chiral 2- and 3-substituted carboxylic acids |
| 02/13/2003 | CA2451090A1 Flow reactors for chemical conversions with heterogeneous catalysts |