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9035095 Processes for producing succinic acid  
Provided are processes for producing high-purity succinic acid from a succinic-acid-containing liquid through crystallization.
8987511 Process for producing adipic acid crystals  
A method for producing crystals of adipic acid is described. In particular, a method for recovering adipic acid in the form of crystals with low impurity content, obtained by crystallization steps...
8957249 Process for removing, isolating and purifying dicarboxylic acids  
A process for removing, isolating and purifying dicarboxylic acid from fermentation broths, which includes the following steps: 1) removal of the biomass and any solids present from the...
8940934 Production process of α-hydroxy acids  
An object of the present invention is to provide a production process of an α-hydroxy acid having a sufficient quality as a polymer raw material, which process does not produce a large amount of...
8895778 Depolymerization of polylactic acid  
The invention provides energy efficient depolymerization of polyesters such as post-consumer polylactic acid. Ultrasonic induced implosions can be used to facilitate the depolymerization. The...
8895779 Processes for producing monoammonium adipate and conversion of monoammonium adipate to adipic acid  
A process for making MAA from a clarified DAA-containing fermentation broth includes (a) distilling the broth to form an overhead that includes water and ammonia, and a liquid bottoms that...
8829237 Production of carboxylic acid and salt co-products  
This invention provide processes for producing carboxylic acid product, along with useful salts. The carboxylic acid product that is produced according to this invention is preferably a C2-C12...
8729298 Method for separation and purification of long-chain diacids  
A method for the separation and purification of at least one long-chain diacid, comprising: introducing an impure preparation comprising at least one long-chain diacid to a stationary phase of a...
8624059 Processes for producing monoammonium succinate from fermentation broths containing diammonium succinate, monoammonium succinate and/or succinic acid, and conversion of monoammonium succinate to succinic acid  
Processes for making monoammonium succinate (MAS) and/or succinic acid (SA) from either a clarified diammonium succinate (DAS)-containing fermentation broth or a clarified MAS-containing...
8263804 Conversion of nitrile compounds into corresponding carboxylic acids and esters  
Hydrocarbon compounds having at least one nitrile function are converted into compounds having at least one carboxylic function by hydrating the nitrile functions into amide functions by reaction...
8203021 Processes for producing monoammonium succinate from fermentation broths containing diammonium succinate, monoammonium succinate and/or succinic acid, and conversion of monoammonium succinate to succinic acid  
Processes for making monoammonium succinate (MAS) and/or succinic acid (SA) from either a clarified diammonium succinate (DAS)-containing fermentation broth or a clarified MAS-containing...
8034975 Method of manufacturing succinic acid and ammonium succinate solutions  
The present invention provides a method of manufacturing a highly pure ammonium succinate solution including the steps of (A) producing calcium succinate trihydrate by crystallization fermentation...
7915447 Process for producing succinic acid  
The present invention is intended to provide a process capable of efficiently producing highly purified succinic acid from an alkali metal succinate by a simple separation and purification...
7896944 Method for extracting fulvic acid molecules  
Methods for extracting molecules of fulvic acid from a humus material such as oxidized lignite are disclosed. The humus material is mixed with water to solubilize at least some of the fulvic acid...
7504536 Compositions comprising calcium citrate malate and methods for making the same  
A process for producing a calcium citrate malate composition by the steps of: combining a calcium source, a citrate source, a malate source and water to form a calcium citrate malate mixture. The...
7470370 Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration  
A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the...
7411090 Process for the recovery of citric acid  
The invention provides a process for the recovery of citric acid from an aqueous solution feed stream originating in fermentation of carbohydrates and utilizing an amine solvent extraction step...
7371890 Method for the continuous production of a compound that carries at least two functional groups  
A process for continuously preparing a compound which bears at least two functional groups which are each independently selected from the group consisting of nitrile group, carboxylic acid group,...
7253312 Process for producing carboxylic acids  
The present invention relates to a process for producing carboxylic acids. It relates more particularly to a process for producing carboxylic acids by oxidation of a hydrocarbon with oxygen or a...
7217837 Method for producing organic acid  
A free organic acid can be produced efficiently at a low cost, by subjecting an ammonium salt of organic acid A such as a dicarboxylic acid, a tricarboxylic acid or an amino acid, to reactive...
7144977 Lactic acid processing; methods; arrangements; and, products  
The techniques for processing lactic acid/lactate salt mixtures are provided. Preferred mixtures for processing are obtained from fermentation broths, preferably from fermentation processes...
7084300 Work-up of residues in the preparation of carboxylic acids  
Degradation acids obtained in the synthesis of carboxylic acids, in particular dicarboxylic acids, having from 8 to 16 carbon atoms may be isolated by separating the degradation acids in the form...
7019170 Process for the recovery of lactic acid by contacting aqueous solutions containing the same with a basic organic extractant  
The invention provides a process for the recovery of lactic acid and products thereof from an aqueous solution containing free lactic acid and at least one lactate salt at a total concentration of...
6946572 Crystallization of adipic acid from its solution in aqueous nitric acid  
Process for crystallization of adipic acid from a nitric acid oxidation product of cyclohexane in which process the oxidation product is subject to crystallization in a series of crystallizers of...
6946571 Drying of adipic acid  
Process for drying moist, solid adipic acid using at least two drying stages in which moist solid adipic acid is progressively dried by contacting it in at least two successive stages with a...
6926810 Process for obtaining an organic acid from an organic acid ammonium salt, an organic acid amide, or an alkylamine organic acid complex  
Disclosed herein are methods for the recovery of an organic acid, such as a heat stable lactic acid, from a feed stream which contains at least one of an organic acid amide, an organic acid...
6903235 Pharmaceutical-grade ferric citrate  
The present invention relates to pharmaceutical-grade ferric citrate. Pharmaceutical-grade ferric citrate contains a definite composition and a definite hydrate. The present invention also relates...
6822117 Method for making adipic acid  
The present invention relates to a process for the manufacture of adipic acid, more particularly of adipic acid crystals. It relates more specifically to a process for the treatment of the adipic...
6667417 Process for the recovery of lactic acid  
The invention provides a process for producing lactic acid from a medium containing an alkaline earth-metal salt of lactic acid, comprising (a) reacting a conjugated base of an alkali metal from a...
6627768 Process for recovery of acid  
The invention provides a process for the conversion of an extracted carboxylic acid to a non-ionized derivative thereof, comprising contacting a carboxylic acid containing aqueous solution with a...
6600070 Methods for making 2-(&ohgr -alkoxycarbonylalkanoyl)-4-butanolide, ester of &ohgr -hydroxy-(&ohgr -3)-ketoaliphatic acid, and derivatives thereof  
In industrial production of ω-hydroxyaliphatic acid being an important intermediate for large cyclic lactone-based perfumes, using dicarboxylate ester which is inexpensive and readily obtainable,...
6559339 Method for crystallizing carboxylic acid  
The present invention relates to a process for the crystallization of carboxylic acid, more particularly adipic acid, and a process for manufacturing crystalline carboxylic acid, more specifically...
6538156 Method for purifying adipic acid by crystallization  
The invention discloses a method for purifying adipic acid by crystallization or recrystallization in at least one carbolyxic acid. More precisely, it discloses an improvement in adipic acid...
6534680 Dicarboxylic acid crystallizates  
Dicarboxylic acid crystals are prepared from a solution containing at least one organic dicarboxylic acid in a process in which at least one anionic polyelectrolyte having a molecular weight of at...
6515171 Process for separating an oxidation reaction product and an oxidation catalyst  
An oxidation reaction mixture (e.g. adipic acid, benzoic acid, butenediol) and an oxidation catalyst are efficiently separated from a reaction mixture with the use of an aqueous solvent (e.g....
6433220 Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid  
This invention relates to methods of controlling the oxidation of cyclohexane to adipic acid in the presence of a monobasic acid solvent, by extracting the catalyst from the reaction mixture,...
6433221 Methods of separating catalyst in solution from a reaction mixture produced by oxidation of cyclohexane to adipic acid  
This invention relates to methods of controlling the oxidation of cyclohexane to adipic acid in the presence of a monobasic acid solvent, by separating the catalyst from the reaction mixture,...
6417128 Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst  
This invention relates to methods of replacing water and cyclohexanone with acetic acid in an aqueous solution of catalyst, preferably a cobalt compound. Such an aqueous solution is produced by...
6376709 Process for the crystallization of dicarboxylic acids  
The subject invention relates to a process for the crystallization of di-carboxylic acids comprising dissolving the crude dicarboxylic acid at a temperature sufficient to dissolve the crude diacid...
6376223 Process for purifying polycarboxylic acids  
Polycarboxylic acids are purified by contacting a crude polycarboxylic acid with a solvent to produce a substantially pure polycarboxylic acid. The solvent is chosen so that the impurities are...
6294689 Methods for removing catalyst after oxidation of hydrocarbons  
This invention relates to oxidative methods for controlling the oxidation of a class of compounds, including hydrocarbons, such as cyclohexane for example, alcohols, such as cyclohexanol for...
6288275 Separation and purification of carboxylic acids from fermentation broths  
Carboxylic acids, particularly dicarboxylic acids, are separated from a fermentation broth by adjusting the pH of the fermentation broth to about 2.0 or below, and then heating the broth to a...
6258980 Production of metal salts  
There is described a process for the production of a substantially anhydrous salt of an organic acid which comprises reacting a basic compound of a metal with the appropriate organic acid,...
6248797 Supercritical carbon dioxide extraction of contaminants from ion exchange resins  
A method for extracting leachable contaminants from ion exchange resins comprises exposing the resin to supercritical carbon dioxide for a sufficient interval of time to allow at least a portion...
6245942 Reduction of the carbonyl value of carboxylic acids and derivatives of carboxylic acids and derivatives of carboxylic acids  
A method for reducing the carbonyl value of a composition containing carboxylic acid or carboxylic acid derivative includes contacting the composition containing carboxylic acid or carboxylic acid...
6222069 Method for purifying adipic acid in water  
The invention discloses a method for purifying adipic acid in water. More precisely it discloses an improvement in adipic acid crystallization or recrystallization in water, characterised in that...
6218574 Process for purifying long-chain dicarboxylic acid  
The present invention relates to an aqueous phase process for purifying long-chain dicarboxylic acids from a liquid containing a long-chain dicarboxylic acid/or a salt thereof. The invention...
6063958 Method of recovering adipic acid and 6-hydroxycaproic acid from waste solution of alkali metal salts of organic acids coming from the process of cyclohexane oxidation  
A method of recovering adipic acid and 6-hydroxycaproic acid from the waste solution of alkali metal salts of organic acids coming from the process of cyclohexane oxidation, which comprises: (i)...
5981798 Preparation of a crystalline solid from glycine-N,N-diacetic acid derivatives with sufficiently low hygroscopicity  
A crystalline solid which has a sufficiently low hygroscopicity for processing and use and essentially consists of glycine-N,N-diacetic acid derivatives is prepared by adjusting the water content...
5929277 Methods of removing acetic acid from cyclohexane in the production of adipic acid  
This invention relates to methods of removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitated by...

Matches 1 - 50 out of 245 1 2 3 4 5 >