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| Number | Title | Issue Date |
| 7432390 | Production of carboxylic acids or carboxylic acid esters In the production of carboxylic acid or carboxylic acid ester, a reaction product containing the carboxylic acid or carboxylic acid ester which has been produced by the reaction of an olefin, carbon monoxide, and water or an alcohol in the presence of HF is heat-tre... | 10/07/2008 |
| 7214830 | Process for the preparation of acylphosphines, acyl oxides and acyl sulfides A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or m... | 05/08/2007 |
| 7135428 | Catalyst solution for implementing anionic lactam polymerization, method for production thereof and polyamide moulding compound A catalyst solution for the anionic polymerization of lactones and/or lactams comprises a salt of at least one compound of the general formula I In this formula (I), R1 is H or an aliphatic, cycloaliph... | 11/14/2006 |
| 7094931 | Process for the preparation of acylphosphines, acyl oxides and acyl sulfides A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or m... | 08/22/2006 |
| 6562999 | Process for separation of crude naphthalene dicarboxylic acid using reverse osmosis Disclosed is a process for purifying 2,6-naphthalene dicarboxylic acid produced by disproportionation and more efficiently recycling byproduct dipotassium salts which includes the steps of: a) Contacting an aqueous solution containing the disalt of 2,6-ND... | 05/13/2003 |
| 6441224 | Process for carboxylation of naphthoic acid to naphthalene dicarboxylic acid Disclosed is a method for selective carboxylation of naphthoic acid, or other aromatic mono-acids to form primarily 2,3-naphthalene dicarboxylic acid (2,3-NDA) or other aromatic diacids which comprises reacting said aromatic mono-acid in the presence of o... | 08/27/2002 |
| 6350904 | Method for producing ortho-alkylated benzoic acid derivatives The invention relates to a process for the preparation of ortho-alkylated benzoic acid derivatives of the formula I ##STR1## characterized in that an aryl bromide of the formula II ##STR2## is reacted with a secondary or tertiary organolithium compound an... | 02/26/2002 |
| 6348624 | Process for making certain benzoic acid compounds The subject invention involves processes for making 2,4-difluoro-3-Q1-benzoic acid, wherein Q1 is derived from an electrophilic reagent, comprising the steps of: (a) treating 1-bromo-2,4-difluorobenzene with a strong, non-nucleophilic base; then trea... | 02/19/2002 |
| 6107516 | Production of aromatic hydroxycarboxylic acids A process for the production of aromatic hydroxycarboxylic acids such as salicylic acid comprising contacting an aromatic hydroxy compound such as phenol with carbon dioxide in the presence of fluoride ion. The products are useful as pharmaceuticals and c... | 08/22/2000 |
| 6040478 | Process for dicarboxylating dihydric phenols A process is disclosed for dicarboxylating dihydric phenols, notably those where the hydroxyl groups are in the para or the ortho position vis-a-vis one another. More particularly, the invention pertains to a process for preparing 2,5-dihydroxyterephthali... | 03/21/2000 |
| 5616787 | Process for the preparation of alkylated aromatic carboxylic acids and acyl halides The invention relates to a process for the preparation of polyalkylated aromatic carboxylic acids of formula I ##STR1## wherein R1, R2, R3, R4 and R5 are each independently of one another hydroge... | 04/01/1997 |
| 5312975 | Process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid A process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid comprising the reaction of an organometallic derivative with a suitable substituted benzene in the presence of a transition-metal based catalyst is described.... | 05/17/1994 |
| 5210322 | Processes for the preparation of ethers A process for preparing ethers which comprises contacting a carboxylated ether with a metal oxide catalyst under conditions effective to produce the ether.... | 05/11/1993 |
| 5189205 | Process for preparing isocyanates A process for preparing isocyanates comprising (a) contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and an organic, nitrogenous base to produce the corresponding ammonium carbamate salt, and (b) reacting the ammo... | 02/23/1993 |
| 5183934 | 2-trifluoromethyl-4-hydroxybenzoic acid Disclosed is a novel compound 2-trifluoromethyl-4-hydroxybenzoic acid represented by the formula: ##STR1##... | 02/02/1993 |
| 5072036 | Process for preparing para-hydroxybenzoic acid Para-hydroxybenzoic acid is prepared by reacting an alkali metal salt of phenol except the lithium and sodium salts with carbon dioxide in the presence of at least one compound selected from compounds of the following formulae (I) and (II): ##STR1## ... | 12/10/1991 |
| 4996354 | Preparation of 2,4-dihydroxybenzoic acid 2,4-Dihydroxybenzoic acid is prepared in a solids mixer by reacting resorcinol with an alkali metal bicarbonate and/or alklai metal carbonate in a carbon dioxide atmosphere using as the alkali metal bicarbonate or alkali metal carbonate a mixture of the c... | 02/26/1991 |
| 4942257 | Method of manufacturing alkali metal salt of 2,3,6,7-naphthalenetetracarboxylic acid A method of manufacturing an alkali metal salt of 2,3,6,7-naphthalenetetracarboxylic acid. Either a sodium salt or a mixture of sodium salt and potassium salt of at least one naphthalenecarboxylic acid selected form the group consisting of naphthoic acids... | 07/17/1990 |
| 4853414 | Halogenated esters Compounds of formula (I), useful as insecticides and knockdown agents: ##STR1## where Y is C1-6 alkoxy, Z is halo or C1-6 alkoxy; R is --(CH2)p --(O)m --R3 where m and p may be 0 or 1; ... | 08/01/1989 |
| 4845276 | Preparation of dialkoxybenzoic acid 2,6-dialkoxybenzoic acid is made by metalation of 1,3-dialkoxybenzene by reaction with potassium dialkylamide. The metalated dialkoxybenzene is carbonated and acidified to form the dialkoxybenzoic acid.... | 07/04/1989 |
| 4845277 | Method of preparing dialkoxybenzoic acid 2,6-dialkoxybenzoic acid is made by direct metalation of 1,3-dialkoxybenzene by potassium. The metalated dialkoxybenzene is carbonated and acidified to form the dialkoxybenzoic acid.... | 07/04/1989 |
| 4820868 | Process for preparation of naphthalene-2,6-dicarboxylic acid dialkali metal salts Disclosed is a process for the preparation of a naphthalene-2,6-dicarboxylic acid dialkali metal salt which comprises heating an alkali metal salt of naphthoic acid and/or a dialkali metal salt of naphthalene-dicarboxylic acid under pressure with carbon d... | 04/11/1989 |
| 4780567 | Process for producing aromatic hydroxycarboxylic acids This invention provides a process for selectively producing aromatic hydroxycarboxylic acids, which comprises subjecting a liquid mixture consisting of a polycyclic aromatic hydrocarbon, an alkali metal salt of an aromatic hydroxy compound and a free arom... | 10/25/1988 |
| 4730083 | Process for the preparation of 3,5-dialkyl-4-hydroxy benzoic acid An improved process for the preparation of 3,5-dialkyl-4-hydroxybenzoic acid comprising the reaction of 2,6-dialkylphenol and carbon dioxide in the presence of a mono- or polyalkylene glycol ether.... | 03/08/1988 |
| 4697037 | Preparation of dibenzo[b,f]thiepin compounds The preparation of dibenzo[b,f]thiepin compounds by a process comprising the direct carboxylation of an ortho-toluyl-aryl sulfide to introduce a phenylacetic acid side chain is disclosed.... | 09/29/1987 |
| 4658054 | Process for the preparation of 5,6-dialkoxyanthranilic acids A process for the preparation of 5,6-dialkoxyanthranilic acids is described. The 5,6-dialkoxyanthranilic acids are useful in the preparation of substituted quinazolinediones which are active cardiotonic agents.... | 04/14/1987 |
| 4564700 | Process for the preparation of fluorene-9-carboxylic acid An improved process for the preparation of fluorene-9-carboxylic acid comprising reacting fluorene and a dialkyl carbonate with alkyls of 1 to 5 carbon atoms in the presence of a member of the group consisting of alkali metal hydrides or potassium alcohol... | 01/14/1986 |
| 4533500 | Process for manufacturing N-acyliminodiacetic acids N-acyliminodiacetic acids are manufactured by reacting formaldehyde or a formaldehyde generator compound with a N-unsubstituted amide or a generator thereof and with carbon monoxide in contact with a carbonylation catalyst, for example, a cobalt compound,... | 08/06/1985 |
| 4529817 | Process for preparing aromatic hydroxycarboxylic acids Aromatic hydroxycarboxylic acids are prepared by reacting an alkali metal salt of an aromatic hydroxy compound in solid phase with carbon dioxide, by reacting an alkali metal salt of an aromatic hydroxy compound in the form of granules in a fluidized bed ... | 07/16/1985 |
| 4518799 | Processes for the preparation of hydratropic acids Novel processes for making arylpropionic acids are described. One process comprises carboxylating particular Grignard compounds which are the products of a catalyzed reaction between corresponding arylmagnesium bromides and ethylene. Furthermore, the reac... | 05/21/1985 |
| 4508920 | Process for the preparation of aromatic hydroxycarboxylic acids Aromatic hydroxycarboxylic acids are prepared by reacting alkali metal salts of aromatic hydroxy compounds in the solid phase with carbon dioxide in a process in which the alkali metal salt of the aromatic hydroxy compound is reacted at temperatures of 12... | 04/02/1985 |
| 4405640 | Substituted fluorobenzyl cyclopropane carboxylates useful as insecticides Insecticides of the formula ##STR1## wherein R1 and R2 are each selected from methyl, halomethyl, and halo; X is oxygen, sulphur, sulphonyl or a group NR4 where R4 represents hydrogen, lower alkyl or lower ... | 09/20/1983 |
| 4345094 | Process for the production of 6-hydroxy-2-naphthoic acid The production of 6-hydroxy-2-naphthoic acid from anhydrous potassium 2-naphthoxide and carbon dioxide is improved by forming a mixture of 0.8-1.2 moles of 2-hydroxynaphthalene per equivalent of potassium base, dehydrating the mixture, adding carbon dioxi... | 08/17/1982 |
| 4345095 | Process for the production of 6-hydroxy-2-naphthoic acid The production of 6-hydroxy-2-naphthoic acid from anhydrous potassium 2-naphthoxide and carbon dioxide is improved by forming a mixture of 0.8-1.45 moles of 2-hydroxynaphthalene per equivalent of potassium base, dehydrating the mixture, adding carbon diox... | 08/17/1982 |
| 4287357 | Process for the production of 6-hydroxy-2-naphthoic acid The production of 6-hydroxy-2-naphthoic acid from anhydrous potassium 2-naphthoxide and carbon dioxide is improved by forming a mixture of 0.8-1.2 moles of 2-hydroxynaphthalene per equivalent of potassium base, dehydrating the mixture, adding carbon dioxi... | 09/01/1981 |
| 4242524 | Process for the preparation of 2-(4'-nitrophenyl)-propionic acid The present invention concerns a process for the preparation of 2-(4'-nitrophenyl)-propionic acid of the formula (I): ##STR1## More particularly, this invention relates to a process for the preparation of 2-(4'-nitrophenyl)-propionic acid (I) startin... | 12/30/1980 |
| 4239913 | Process for preparing 2-hydroxynaphthalenecarboxylic acids A process for preparing 2-hydroxynaphthalenecarboxylic acids which comprises reacting a liquid mixture of 1 mole of an alkali ଲ-naphtholate, 0.05 to 3 moles of ଲ-naphthol, and 0.1 to 5 times the weight of the alkali ଲ-naphtholate of ligh... | 12/16/1980 |
| 4232172 | Process for the preparation of 3,6-dichloro-salicyclic An improved process for the preparation of 3,6-dichlorosalicylic acid by carboxylation of potassium 2,5-dichlorophenolate with carbon dioxide in xylene at elevated pressure, where the improvement consists of adding finely powdered, anhydrous potassium car... | 11/04/1980 |
| 4132732 | Process for preparing alpha-formyl acids Alpha-formyl acids are prepared by carboxylation of aldehydes in the presence of unsubstituted or substituted alkaline phenates, and of aprotic organic solvents.... | 01/02/1979 |
| 4084061 | Process for producing benzyl sodium, phenylacetic acid and derivative thereof Phenylacetic acid is produced by reacting chlorotoluene with sodium to form tolylsodium, rearranging the product to benzyl sodium and then reacting the benzyl sodium with a carboxylating agent.... | 04/11/1978 |
