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)
01/1997
01/01/1997CN1139099A Process for fractional separation of (meth) acrylic acid from mixture containing (meth) acrylic acid
01/01/1997CN1139098A Continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or mixture thereof
01/01/1997CN1139097A Process for carbonylation of alkyl alcohols and/or reactive derivatives thereof
01/01/1997CN1139018A Method for recovering carbon monoxide from exhaust containing at least carbon monoxide, nitrogen and hydrogen of acetic acid synthesizer
01/01/1997CN1033698C Process for production of carboxylic cid anhydrides
12/1996
12/31/1996CA2039563C Process for producing unsaturated aldehydes and unsaturated acids
12/27/1996WO1996041791A1 Method of obtaining terephthalic acid of monomeric purity
12/27/1996WO1996041790A1 Method of obtaining isophthalic acid of monomeric purity
12/27/1996EP0749973A1 Novel bisphosphines as catalysts for asymmetric reactions
12/27/1996EP0749953A1 Preparation of chiral alpha-halocarboxylic acids
12/27/1996EP0749952A1 Process for the preparation of citraconic anhydride
12/27/1996EP0749951A1 Process for the extraction of hydroxy-carboxylic acids from aqueous solutions
12/27/1996EP0749950A1 Process for the production of partial oxidation products
12/27/1996EP0749949A1 Process for the carbonylation of alkyl alcohols
12/27/1996EP0749948A1 Process for the carbonylation of alkyl alcohols and/or reactive derivatives thereof
12/27/1996EP0749409A1 Decarboxylation process
12/25/1996CN1138570A Catalytic gas-phase oxidation of acrolein to acrylic acid
12/25/1996CN1138569A Process for preparation of 3-chloropropionic acid
12/25/1996CN1033635C Process for the purification of gaseous hydrochloric acid
12/24/1996US5587511 Process for obtaining adipic acid
12/24/1996US5587510 (S)-2-aralkyl-3-chloropropionic acid and process for the preparation thereof
12/24/1996US5587508 Process for producing 2,6-naphthalenedicarboxylic acid and ester thereof
12/24/1996US5587135 Contacting gas stream with noble metal-free catalyst containing copper aluminate spinel in alumina matrix in which part or all of copper has been replaced by tin, lead, zinc, magnesium, calcium, strontium and/or barium
12/24/1996US5587056 Forming anhydride from aliphatic diacids
12/23/1996CA2179768A1 Isolation of hydroxy carboxylic acids from aqueous solutions
12/19/1996WO1996041021A1 Method and apparatus for the recovery and purification of organic acids
12/19/1996WO1996040612A1 Method and apparatus for preparing purified terephthalic acid
12/19/1996WO1996040611A1 Process for making soluble zirconium and hafnium organic acid complexes
12/19/1996WO1996040610A1 Methods and devices for making intermediate oxidation products by controlling conversions and temperatures in an atomized liquid
12/19/1996WO1996040609A1 Production of levulinic acid from carbohydrate-containing materials
12/19/1996CA2224177A1 Methods and devices for making intermediate oxidation products by controlling conversions and temperatures in an atomized liquid
12/19/1996CA2224081A1 Method and apparatus for preparing purified terephthalic acid
12/18/1996EP0748787A1 Process for the continuous preparation of monocarboxylic acids
12/18/1996EP0748326A1 Optically active diphosphines and method for preparing same by resolution of the racemic mixture
12/18/1996EP0748309A1 Process for the production of cyclohexyladipates and adipic acid
12/18/1996EP0654074B1 Hydrogenation in a plate heat exchanger
12/18/1996CN1138319A Process for the preparation of an aldehyde
12/18/1996CN1138025A Process for producing terephthalic acid
12/18/1996CN1138024A Process for producing highly terephthalic acid
12/18/1996CN1138023A Process for preparation of aromatic compounds by decarboxylation of aromatic carboxylic acids
12/18/1996CN1138022A Synthetic method of phenyl-pyruvic alkali salt and ammonium salt
12/18/1996CN1138021A Process for carbonylation of butadiene or butadiene derivative
12/18/1996CN1138020A Process for producing carboxylic acid
12/18/1996CN1033578C Continuous process for preparation of acetic antydride or mixtures of acetic anhydride and acetic acid
12/17/1996US5585502 Process and plant for the purification of raw maleic anhydride recovered from gaseous reaction mixtures
12/17/1996CA1338802C Production of formate salts of nitrogenous bases
12/12/1996WO1996039595A1 Effluent gas treatment
12/12/1996WO1996039377A1 Face-to-face/face-to-edge interactive chiral selectors and related apparatuses
12/12/1996WO1996039373A1 Method for preparation of carboxylic acids
12/11/1996EP0747340A1 Anhydrous trisodiumcitrate, process for its preparation and its use as carriers
12/11/1996EP0746539A1 Process for the preparation of cinnamic acid derivatives
12/11/1996EP0746410A1 Water-soluble chiral sulfonated binap catalyst for asymmetric synthesis of optically active compounds
12/11/1996CN1137514A Recovery of highly flouorinated carboxylic acids from gas phase
12/11/1996CN1137508A Reagent and process which are useful for grafting substituted difluoromethyl group onto compound containing at least one electrophilic function
12/11/1996CN1033520C Solvent extraction method concentration process of gibberellin fermented filtrate
12/10/1996US5583254 Process for the production of purified terephthalic acid
12/10/1996US5583084 Used in the preparation of methacrylic acid by gas-phase catalytic oxidation of methacrolein
12/10/1996CA2048442C Process for producing 3,5-di(.alpha.-methylbenzyl)salicylic acid derivative, and use of polyvalent-metal-modified product thereof as color developer
12/05/1996WO1996038407A1 Process for producing cyclohexanonoxim and caprolactam
12/05/1996WO1996038402A1 Improved oxidation process
12/05/1996WO1996038400A1 Method for preparing a meta-dihydroxylated aromatic compound
12/05/1996DE19520271A1 Verfahren zur Herstellung von Cyclohexanonoxim und Caprolactam A process for the preparation of cyclohexanone oxime and caprolactam
12/05/1996DE19520257A1 Cost-effective prodn. of acetic acid with high selectivity
12/05/1996DE19520256A1 Cost-effective prodn. of lower aliphatic acids with high selectivity
12/05/1996CA2222417A1 Improved oxidation process
12/04/1996EP0745578A1 Method of producing partial oxidation products
12/04/1996EP0745116A1 Hydrogenation of unsaturated fats, fatty acids or fatty acid esters
12/04/1996EP0745115A1 Use of carboxylic acid esters as fuel or lubricant additives and process for preparing the same
12/04/1996EP0745062A1 Desorption process and apparatus
12/04/1996CN1137266A Process for preparing aromatic carboxylic acids with efficient energy recovery
12/04/1996CN1033450C Process for producing high-purity chloric acid
12/03/1996US5581003 Method for making soluble zirconium and hafnium organic acid complexes
12/03/1996US5580905 Process for recycling polyesters
12/03/1996CA2158634C Process and catalyst for the dehalogenation of carboxylic alpha-halogenated acids
12/03/1996CA2014043C Process and catalyst for dehalogenation of alphahalogen carboxylic acids
11/1996
11/28/1996WO1996037454A1 Method for preparing 3-carboxy-4-hydroxybenzaldehydes and derivatives thereof
11/28/1996WO1996037453A1 Preparation of aralkanoic acids and esters using mixed ligand catalyst
11/28/1996WO1996037297A1 Catalysts for the selective oxidation of organic substrates and process for producing the same
11/28/1996DE3890273C1 Stabilising or regenerating, of hetero-poly-acid oxidn. catalyst
11/28/1996DE19519004A1 Neue selen- und rutheniumhaltige Metalloxidkatalysatoren sowie ein Verfahren zu ihrer Herstellung und ihre Verwendung New selenium and ruthenium metal oxide catalysts and a process for their preparation and their use
11/28/1996CA2222020A1 Preparation of aralkanoic acids and esters using mixed ligand catalyst
11/27/1996EP0744393A1 Process for the preparation of polyalkene-substituted succinic acylating agents in the presence of a dihelotriphenylphosphorane as catalysts
11/27/1996EP0744214A1 Supported catalyst for oxydation reactions in the gaz phase
11/27/1996EP0743935A1 Process for making carboxylic acids
11/27/1996CN1136553A Method for separating (methyl) propenoic acid from mixture
11/27/1996CN1033386C Method for producing acetic acid by carbonylation
11/26/1996US5578647 Heating hydrocarbons, wastes, lignocellulose, sludges, with acids, bases, salts, oxides, or oxidants
11/26/1996US5578286 Reacting magnesium compound and alumina to form meixnerite intermediate; reacting with di- or polycarboxylate
11/21/1996WO1996036584A1 Process for resolving chiral acids with 1-aminoindan-2-ols
11/21/1996WO1996036432A1 Post-treatment process and product
11/21/1996CA2221375A1 Process for resolving chiral acids with 1-aminoindan-2-ols
11/20/1996EP0743322A2 Process for the recovery of an organic acid from the manufacture of a cellulose ester
11/20/1996EP0743283A2 Recovery of gadolinium and its complexing agents from aqueous solutions containing their complexes
11/20/1996EP0742788A1 Process for the preparation of a linear formyl compound
11/20/1996EP0742787A1 A process for preparing 3-methyl-2-pentene
11/20/1996CN1136309A Method to produce cyclic esters
11/20/1996CN1136306A Method of preparing a caesium and ribidium salt solution
11/20/1996CN1136033A Process for recovery of carbonylation product
11/20/1996CN1033324C Process for preparing sodium citrate
11/19/1996US5576459 Quaternary nitrogen or phosphorus chirates
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