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)
11/1999
11/10/1999	CN1046264C Carboxylic acid isomerisation method
11/10/1999	CN1046263C Process for carboonylation of acetylenically unsaturated compounds
11/10/1999	CN1046253C Method for preparing caesium and ribidium salt solution
11/10/1999	CN1046218C Catalyst system for carbonylation of acetylenically unsaturated compounds
11/09/1999	US5981804 Catalyst for production of unsaturated aldehyde and unsaturated carboxylic acid and method for production of unsaturated aldehyde and unsaturated carboxylic acid by use of the catalyst
11/09/1999	US5981796 From branched olefins by means of reaction with carbon monoxide and a solid acid catalyst
11/09/1999	US5981789 Chlorodenitrating aromatic compounds using less chlorinating agent and lower temperatures, then recycling the product mixture to increase the yield
11/09/1999	US5981773 Reacting a corresponding perylene-3,4:9,10-tetracarboxylic dianhydride with a sterically hindered amine, as a base, at an elevated temperature
11/09/1999	US5981769 From adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols by esterifying and hydrogenating a substream to give hexanediol and cyclizing 6-hydroxycaproic esters to give caprolactone
11/09/1999	US5981754 4-aryl-1-phenylalkyl-1,2,3,6-tetrahydropyridines having neurotrophic and neuroprotective activity
11/09/1999	US5981420 Oxidation catalysts system consists of an n-hydroxy or n-oxy imide compound and a transition metal compound excluding a polyacid as cocatalyst
11/09/1999	US5980801 Oxidizing hydrocarbon and initiator mixture form compound selected from phthalic acid, adipic acid, isophthalic acid, terephthalic acid; reacting compound with polyol,or polyamine or polyamide to form polyester, or polyamide or polyimide
11/09/1999	US5980696 Recovering solvent from feed stream having water via azeotropic distillation with organic phase reflux using entrainer selected from isobutyl acetate, n-propyl acetate
11/04/1999	WO1999055658A1 Process for the manufacture of acetic anhydride
11/04/1999	DE19819375A1 Verfahren zur Herstellung von substituierten Benzolen A process for the preparation of substituted benzenes
11/03/1999	EP0953561A1 Preparation of dimethylterephthalate via the air oxidation of p-tolualdehyde
11/03/1999	EP0776317B1 Two powder synthesis of hydrotalcite and hydrotalcite-like compounds
11/03/1999	EP0712831B1 Selective dehalogenation method
11/03/1999	CN1234019A Removal of permanganate reducing compounds and alkyl iodides from a carbonylation process stream
11/03/1999	CN1233975A Catalyst recovery
11/02/1999	US5977419 Process for the preparation of substituted phenylpropenes
11/02/1999	US5977407 Process for isomerically selective hydrocarboxylation of olefins
11/02/1999	US5977405 Preparation of aromatic hydroxycarboxylic acids and dialkali metal salts thereof
11/02/1999	US5977391 (+)- and (-) -8-halogen-6- hydroxy-octanoic acid its salts and esters and process for making
11/02/1999	US5977350 Selective oxidation in alkaline medium using oxygenous gas in presence of palladium on carrier and bismuth as promoter, then reducing oxygen supply to liquid phase towards end of reaction to prevent catalyst deactivation
10/1999
10/28/1999	WO1999054856A1 Polymer conjugates of polyethylene glycols or oxides with polyethyleneimine or polypropyleneimine for extracting carboxylic acids from solutions
10/28/1999	WO1999054335A1 Stable concentrated rare earth carboxylate liquids
10/28/1999	WO1999054275A1 Process for producing chloromethylphenylacetic acid
10/28/1999	WO1999054274A1 Preparation of organic acids
10/28/1999	WO1999054273A1 Process for the production of acetic acid and/or acetic anhydride
10/28/1999	CA2329309A1 Preparation of organic acids
10/28/1999	CA2328890A1 Stable concentrated rare earth carboxylate liquids
10/27/1999	EP0951351A1 Shell catalyst for producing acetic acid by gas phase oxidation of unsaturated c 4? hydrocarbons
10/27/1999	EP0891317B1 Process for decolorizing cyclopropanecarboxylic acid
10/27/1999	CN1233235A Method for selective preparation of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde and derivatives
10/27/1999	CN1232878A Process for recovering rhodium catalyst
10/26/1999	US5973197 Process for the preparation of carboxylic acids by carbonylation in the presence of rhodium
10/26/1999	US5973196 Hydrogenating crude terephthalic acid, precipitating crystals out of reaction liquor, separating crystals from mother liquor; washing with water; controlling temperature of wash to maintain transmittance of crystals within a range
10/26/1999	US5973182 Resolution of racemic mixtures
10/26/1999	US5973173 Process for concentrating azelaic acid
10/26/1999	US5972833 Batch processing; drying, heating, roasting
10/26/1999	US5972174 Process for the purification of maleic anhydride
10/21/1999	WO1999052948A1 Separations using ampholytic base polymers
10/21/1999	WO1999052854A1 PROCESS FOR THE GENERATION OF α,β-UNSATURATED CARBOXYLIC ACIDS AND ESTERS USING NIOBIUM CATALYST
10/21/1999	WO1999052850A1 Oxidation process using periodic acid
10/21/1999	WO1999052849A1 Oxidation process using tempo
10/21/1999	WO1999052841A1 Process for producing aromatic compounds via treatment with supercritical water
10/21/1999	WO1999052628A1 Production of unsaturated acids or esters thereof and catalysts therefor
10/21/1999	WO1999052528A1 Pharmaceutical preparations containing hydrosoluble ketoprofen salts and their application
10/21/1999	CA2327929A1 Oxidation process using periodic acid
10/21/1999	CA2327890A1 Oxidation process using tempo
10/21/1999	CA2293605A1 Pharmaceutical preparations containing hydrosoluble ketoprofen salts and their application
10/20/1999	EP0950045A2 A solid-phase technology for the preparation of amides
10/20/1999	EP0742787B1 Process for preparing 2-ethyl-2-methylbutanoic acid from 3-methyl-2-pentene
10/20/1999	CN1232033A Production process for pyromellitic dianhydride
10/20/1999	CN1232018A Process for synthesizing benzoic acids
10/20/1999	CN1232017A Method for producing optically active chrysanthemic acid
10/20/1999	CN1232016A Method for production of maleic anhydride
10/19/1999	US5969200 Process for the manufacture of acetonylbenzamides
10/19/1999	US5969183 Isomerizing methyl formate in presence of group 8 metal catalyst, iodine compound, carbon monoxide, wherein formic acid, carbon monoxide and methyl formate are allowed to coexist in flash distillation and/or recycling zone
10/19/1999	US5969181 Preparation of salts of pharmaceutical active substances which have acidic groups
10/19/1999	US5969180 Heating mixture containing phenol and carboxylic acid-containing material in presence of macroreticular ion exchange catalyst
10/19/1999	US5969170 Stable in presence of variety of functional groups
10/19/1999	US5969160 Process for producing phthalic anhydride
10/19/1999	US5968982 2,2-Dichloroalkanecarboxylic acids, processes for their production and pharmaceutical agents containing these
10/14/1999	WO1999051707A1 Overbased magnesium deposit control additive for residual fuel oils
10/14/1999	WO1999051562A1 Novel retinoids and use thereof
10/14/1999	WO1999051343A1 Multi-metal oxide compounds
10/14/1999	WO1999051342A1 Multi-metal oxide compounds with a two-phase structure
10/14/1999	WO1999051341A1 Multi-metal oxide materials with a two-phase structure
10/14/1999	WO1999051339A1 Catalyst and process for the oxidation of ethane and/or ethylene
10/14/1999	WO1999051338A1 Multi-metal oxide compounds
10/14/1999	CA2292552A1 Overbased magnesium deposit control additive for residual fuel oils
10/13/1999	EP0949341A1 Process for recovering rhodium catalyst from acetic acid production liquids containing tar
10/13/1999	EP0949236A1 Process for producing acid chlorides having polyfluoroalkyl groups
10/13/1999	EP0948406A1 Vanadyl pyrophosphate oxidation catalyst precursors
10/13/1999	CN1231656A Selective preparation process of acetic acid and catalyts therefor
10/13/1999	CN1231620A Catalyst for dehydrogenation of amino alcohols to amino carboxylic acids or of ethylene glycol (derivatives) to oxycarboxylic acids, method for their production and their use
10/12/1999	US5965771 Regeneration of carboxylic acid-laden basic sorbents by leaching with a volatile base in an organic solvent
10/12/1999	US5965766 Nucleophilic substitution reactions on triflyl-substitued benzenes carried out in the presence of catalysts; hydroxy-,alkanoyloxy-, formyloxy-, alkoxybenzoic acids as well as hydroxy- and alkoxybenzonitriles
10/12/1999	US5965032 Purification of α-, β- or γ-substituted carboxylic acids
10/12/1999	US5965028 Process for treating a liquid
10/07/1999	WO1999050223A2 Process for the preparation of hpb esters
10/07/1999	WO1999050222A1 Method for producing acrylic acid and acrylic acid esters
10/07/1999	WO1999050221A2 Method for producing (meth)acrylic acid and (meth)acrylic acid esters
10/07/1999	WO1999050220A1 Method for producing acrylic acid and acrylic acid esters
10/07/1999	WO1999050219A1 Method for producing acrylic acid and acrylic acid esters
10/07/1999	WO1999050218A1 Process for production of acetic acid
10/07/1999	DE19815281A1 Multimetalloxidmassen Multimetal
10/07/1999	DE19815280A1 Multimetalloxidmassen Multimetal
10/07/1999	DE19815279A1 Multimetalloxidmassen Multimetal
10/07/1999	DE19815278A1 Multimetalloxidmassen Multimetal
10/07/1999	DE19814449A1 Verfahren zur Herstellung von (Meth)acrylsäure und (Meth)acrylsäureestern A process for preparing (meth) acrylic acid and acrylic acid esters, (meth)
10/07/1999	DE19814421A1 Verfahren zur Herstellung von Acrylsäure und Acrylsäureestern A process for the production of acrylic acid and acrylic acid esters
10/07/1999	DE19814387A1 Verfahren zur Herstellung von Acrylsäure und Acrylsäureestern A process for the production of acrylic acid and acrylic acid esters
10/07/1999	DE19814375A1 Verfahren zur Herstellung von Acrylsäure und Acrylsäureestern A process for the production of acrylic acid and acrylic acid esters
10/07/1999	DE19755426C2 Verfahren zur Gewinnung von natürlich vorkommenden organischen Säuren Process for the recovery of naturally occurring organic acids
10/07/1999	CA2325737A1 Process for the preparation of hpb esters
10/06/1999	EP0946494A1 Preparation of nylon salts from diamine carbamates and dicarboxylic acids
10/06/1999	EP0946486A1 Purification of acrylic acid obtained by catalytic oxidation of propylene

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