| Patents for C07C 51 - Preparation of carboxylic acids or their salts, halides, or anhydrides (43,144) |
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| 04/18/2001 | CN1064668C Method for separating and purifying hydroxyno-phthalenecarboxylic acids |
| 04/18/2001 | CN1064667C Carbonylation process for production of carboxylic acid or anhydrides thereof |
| 04/18/2001 | CN1064659C Enhanced oxidation of organic chemicals |
| 04/17/2001 | US6218574 Process for purifying long-chain dicarboxylic acid |
| 04/17/2001 | US6218573 Methods of recovering catalyst in solution in the oxidation of cyclohexane to adipic acid |
| 04/17/2001 | CA2185192C Novel substituted 2,2,-dimethyl-w-phenoxyalcanoic acids and esters; process for preparing the same and pharmaceutical compositions containing them |
| 04/12/2001 | WO2001025375A2 Process for removing unsaponifiable materials from a fatty acid |
| 04/12/2001 | WO2001025180A1 Process for producing a purified lactic acid solution |
| 04/12/2001 | WO2001025173A1 Treatment of mixtures that contain at least one compound with at least one ethylenically unsaturated group |
| 04/12/2001 | WO2001025172A1 A method for preparing and screening one or more compounds |
| 04/12/2001 | WO2001024924A1 Catalyst for acetic acid production, process for producing the same, and process for producing acetic acid with the same |
| 04/12/2001 | DE19948241A1 Gas phase oxidation of propylene to acrylic acid using ring-shaped multi-metal oxide catalyst of specified geometry to maximize selectivity and space-time yield |
| 04/12/2001 | DE19947868A1 Verfahren der chemischen und/oder physikalischen Behandlung von Gemischen, die wenigstens eine chemische Verbindung mit wenigstens einer ethylenisch ungesättigten Gruppe enthalten Methods of chemical and / or physical treatment of mixtures which contain at least one chemical compound having at least one ethylenically unsaturated group |
| 04/12/2001 | DE10003497A1 Purification of (meth)acrylic acid by fractional crystallisation is improved using dynamic crystallisation in at least the lowest crystallisation stage |
| 04/12/2001 | CA2385715A1 A method for preparing and screening one or more compounds |
| 04/11/2001 | EP1090684A1 A catalyst useful for the gas phase oxidation of alkanes, alkenes or alcohols to unsaturated aldehydes or carboxylic acids |
| 04/11/2001 | EP1089959A1 Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid |
| 04/11/2001 | EP1089958A2 Process for the solid phase synthesis of aldehyde, ketone, oxime, amine, hydroxamic acid and alpha,beta-unsaturated carboxylic acid and aldehyde compounds |
| 04/11/2001 | EP1089816A2 Catalyst systems for the one step gas phase production of acetic acid from ethylene |
| 04/11/2001 | CN1291179A Methods and devices for separating catalyst from oxidation mixtures |
| 04/10/2001 | US6215030 Catalytic reduction of acids, esters and anhydrides to alcohols |
| 04/10/2001 | US6215023 4-haloalkyl-6,6-dimethyl-3-oxabicyclo(3.1.0)hexan-2-one is catalytically reduced; decyclization, ring contraction, hydrogenation with transition metal catalyst |
| 04/10/2001 | US6215022 Method for producing 3-hydroxy-2-methylbenzoic acid |
| 04/10/2001 | US6215009 Manufacture of cycloalkenylpolyene esters |
| 04/10/2001 | US6214999 A brominating agent is reacted in a 2 phase medium, under effect photo-irradiation with biphenyl derivative |
| 04/10/2001 | US6214190 Stack of cells |
| 04/10/2001 | US6214174 Tray column for capturing purified liquid; support; discharging aperture |
| 04/10/2001 | CA2161245C Process of preparing cesium salts from cesium-aluminum-alum |
| 04/10/2001 | CA2135225C Organometallic fluorenyl compounds, preparation, and use |
| 04/05/2001 | WO2001023061A2 Recovery process for volatile compounds from solids in aqueous solution |
| 04/05/2001 | DE19946671A1 Verminderung der Krustenbildung bei Kristallisationsprozessen Reduction of crust formation during crystallization processes |
| 04/05/2001 | DE19939566C1 Verzweigte, weitgehend ungesättigte Esteröle, Verfahren zu ihrer Herstellung und ihre Verwendung zur Herstellung von kosmetischen und/oder pharmazeutischen Zubereitungen Branched, substantially unsaturated ester oils, process for their preparation and their use for the production of cosmetic and / or pharmaceutical preparations |
| 04/05/2001 | CA2379624A1 Recovery process for volatile compounds from solids in aqueous solution |
| 04/04/2001 | EP1088810A1 Process for the production of benzaldehyde by the catalytic liquid phase air oxidation of toluene |
| 04/04/2001 | EP1088586A1 Reduction of incrustation during crystallisation processes |
| 04/04/2001 | EP1088576A1 Liquid withdrawing tray for purification column, purification column and method for purification |
| 04/04/2001 | EP1087925A1 Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
| 04/04/2001 | EP1087924A1 Method for preparing p-hydroxymandelic compounds optionally substituted |
| 04/04/2001 | EP0721441B1 Halogenation reactions |
| 04/04/2001 | CN1290244A Process for treating cobalt catalyst in oxidation mixtures of hydrocarbons to dibasic acids |
| 04/04/2001 | CN1290243A Process for preparing aromatic carboxylic acids with efficient treatments of gaseous effluent |
| 04/04/2001 | CN1289760A Process for preparing salicylic acid by solvent method |
| 04/04/2001 | CN1289759A Process for preparing alpha-arylpropionic acid and its salts by oxonation of alpha-arylalcohol |
| 04/04/2001 | CN1289757A Process for extracting alpha-or omege-alkadicarboxylic acid from fermented liquid and refining it |
| 04/04/2001 | CN1289635A Catalystic gas phase oxidation method |
| 04/04/2001 | CN1289634A Catalystic gas phase oxidation reactor |
| 04/04/2001 | CN1289626A Purification method and tower, and liquid seperating tower tray therefor |
| 04/04/2001 | CN1064039C Process for preparing super-ligh basicity-value calcium alkyl salicylate |
| 04/04/2001 | CN1064038C Method for producing high pureness terephthalic acid |
| 04/03/2001 | US6211406 Process for the manufacture of α, α-branched carboxylic acids |
| 04/03/2001 | US6211405 Reacting methanol with carbon monoxide in liquid reaction medium containing catalyst comprising rhodium, iridium, iodide ion; said medium further comprising water, acetic acid, methyl iodide, and methyl acetate, recovering acetic acid |
| 04/03/2001 | US6211404 Introducing into upper portion of continuous crystallization apparatus having stirrer and heater crystals of crude benzoic acid with controlled bulk density and particle size, purifying by counter-current contact of crystals with generated melt |
| 04/03/2001 | US6211398 Process for the preparation of dialkyl esters of naphthalenedicarboxylic acids |
| 04/03/2001 | US6210536 Polymerization inhibitors for acrylic acids and esters |
| 03/29/2001 | WO2001021625A1 Chiral phosphines, transition metal complexes thereof and uses thereof in asymmetric reactions |
| 03/29/2001 | WO2001021572A1 Purification and recovery of dicarboxylic acids using melt crystallization |
| 03/29/2001 | WO2001021571A1 Process for producing pure terephthalic acid with improved recovery of precursors, solvent and methyl acetate |
| 03/29/2001 | WO2001021570A1 Sulfur containing promoter for alkanes oxidative dehydrogenation processes |
| 03/29/2001 | WO2001021569A1 Process for the preparation of 3-pentenoic acid and/or ester thereof starting from butadiene |
| 03/29/2001 | WO2001021565A2 Process for producing 3-bromobenzoyl halides |
| 03/29/2001 | WO2001021307A1 Catalyst |
| 03/29/2001 | DE19946136A1 Inhibitorzusammensetzung Inhibitor composition |
| 03/29/2001 | CA2385315A1 Process for producing 3-bromobenzoyl halides |
| 03/28/2001 | EP1086939A1 Inhibitor composition |
| 03/28/2001 | EP1086938A2 Oxidation of alcohols mediated by nitroxyl derivatives |
| 03/28/2001 | EP0970032A4 Method for preparing cleaved products from castor oil or derivatives thereof |
| 03/28/2001 | CN1289320A Improved method for making mixed high purity (meth) acrylic anhydrides |
| 03/28/2001 | CN1289318A A process for the preparation of cyclopropane carboxylic acids |
| 03/28/2001 | CN1288883A Low-temperature crystallization process to recover phthalic acid from chemical waste water |
| 03/28/2001 | CN1063741C Method for recovery of petroleum acids from mixed extract of isopropyl alcohol-ammonia water |
| 03/28/2001 | CN1063740C Method for anti-releasing of petroleum asphalt |
| 03/27/2001 | US6207859 Stabilization and transport of α, β-unsaturated carboxylic acid and removal of stabilizer |
| 03/27/2001 | US6207022 Reacting aldehyde with hydrazine; distillation |
| 03/27/2001 | CA2320559A1 Inhibitor composition |
| 03/22/2001 | WO2001019908A2 Recovery of modifier compounds and polar organic compounds from a poly(arylene sulfide) recycle mixture |
| 03/22/2001 | WO2001019769A1 Method for purifying acrylic acid obtained by oxidation of propylene and/or acrolein |
| 03/22/2001 | WO2001019768A2 Method for producing acid chlorides |
| 03/22/2001 | WO2001019767A2 Method for purifying acid chlorides |
| 03/22/2001 | WO2001019766A1 Method for preparing acid chlorides and benzene aldehydes |
| 03/22/2001 | DE19934411C1 Verfahren zur Trennung und Reinigung einew wäßrigen Gemisches aus den Hauptkomponenten Essigsäure und Ameisensäure A process for the separation and purification einew aqueous mixture comprising the main components acetic acid and formic acid |
| 03/21/2001 | EP1085006A1 Process for producing fluoroalkylcarboxylic acid |
| 03/21/2001 | EP1085005A2 Process for producing aromatic carboxylic acid |
| 03/21/2001 | EP1085004A1 Process for the carbonylation of butadiene and/or butadiene derivative |
| 03/21/2001 | EP1085002A2 Method of novel noncatalytic organic synthesis |
| 03/21/2001 | EP1084740A1 Apparatus and method for handling easily polymerizable compound |
| 03/21/2001 | EP1084128A1 Powdery, solid rare earth carboxylates with improved solubility |
| 03/21/2001 | EP1084097A1 Method for recovering fluorinated alkanoic acids from waste waters |
| 03/21/2001 | EP0912482B1 Production of aromatic hydroxycarboxylic acids |
| 03/21/2001 | CN1287996A Process for photooxidation synthesis of trichloro-acetyl chloride |
| 03/21/2001 | CN1287995A Method for preparing high concentration formic acid |
| 03/21/2001 | CN1287994A Equipment and method for treating compounds easy to be polymerized |
| 03/21/2001 | CN1287879A Catalyst for oxidation of paraffine |
| 03/21/2001 | CN1063426C Purifying method for pronenoic acid prepared by propene catalyzing and oxidizing |
| 03/21/2001 | CN1063425C Method of purifying acetic acid |
| 03/21/2001 | CN1063424C Process for the preparation of acetic acid |
| 03/20/2001 | US6204394 Reacting halo-phthalic anhydride witha carboante in a solvent with a phase transfer catalyst |
| 03/20/2001 | CA2101359C Inhibiting polymerization of vinyl aromatic monomers |
| 03/15/2001 | WO2001017944A1 Process for producing optically active aminoalcohol |
| 03/15/2001 | WO2001017939A1 Process for the production of fluorocarboxylic acid anhydrides |
| 03/15/2001 | WO2001017938A1 Method for producing hydroxy aromatic carboxylates that are rich in 4-hydroxybenzoate |