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| Number | Title | Issue Date |
| 8178721 | Processes for the production of L-citrulline Processes for producing a suitable purity grade of L-Citrulline are disclosed. The processes can include contacting crude L-Citrulline in an aqueous solution with an adsorptive medium at a temperature above approximately 50° C. and below the temperature of denature... | 05/15/2012 |
| 8153842 | Method for producing 3-(2,2,2-trimethyl-hydrazinium) propionate dihydrate A method for producing 3-(2,2,2-trimethylhydrazinium)propionate dihydrate by saponification of salts of 3-(2,2,2-trimethylhydrazinium)propionate esters with subsequent purification step using saturation with carbon dioxide or sulphur dioxide in alcoholic solution. | 04/10/2012 |
| 8148574 | Method for producing 5-aminolevulinic acid hydrochloride A method for producing crystals of 5-aminolevulinic acid hydrochloride wherein, in carrying out adsorption of 5-aminolevulinic acid contained in a crude 5-aminolevulinic acid solution by a cation exchange resin and its subsequent desorption with an aqueous solution ... | 04/03/2012 |
| 8088949 | Process for purifying L-cysteine L-cysteine-is separated from an L-cysteine-containing fermenter broth containing an oxidizing agent which is capable of oxidizing L-cysteine at pH | 01/03/2012 |
| 7750183 | Methods for purifying amino acids In the method for separating and purifying a basic amino acid, preferably the basic amino acid selected from arginine, lysine or ornithine from a culture containing the amino acid, the culture containing the a basic amino acid and microbial cells, preferably the cul... | 07/06/2010 |
| 7488846 | Pregabalin free of lactam and a process for preparation thereof The present invention encompasses Pregabalin substantially free of Lactam and a process for obtaining Pregabalin substantially free of Lactam comprising extracting an acidic mixture containing a complex of Pregabalin with a strong mineral acid, with C3- | 02/10/2009 |
| 7473801 | Method for purification of amino acid The present invention provides a method for purifying an amino acid contained in an aqueous solution of alkali metal salt of amino acid comprising the steps of: (1) cation exchanging, which comprises subjecting an aqueous solution of alkali metal salt of amino acid ... | 01/06/2009 |
| 7417165 | Crystalline forms of pregabalin Crystalline form of Pregabalin characterized by X-ray powder diffraction peaks at about 5.8, 18.4, 19.2, 20.7, and 23.7° 2θ±0.2° 2θ, methods for its preparation, its pharmaceutical compositions thereof, and methods for the preparation of crystalline form of Pre... | 08/26/2008 |
| 7411062 | 7α-biscarbonyl-substituted steroid compounds The present invention involves intermediates, including a 7α-substituted steroid (II), and processes which are used to prepare eplerenone, a useful pharmaceutical agent. ... | 08/12/2008 |
| 7411089 | Nateglinide crystals New nateglinide crystals, i.e. nateglinide A-type crystals (main peaks in powder X-ray diffraction: 4.4°, 5.2°, 15.7°, 18.5°(2θ)), M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8°(2θ)) and P-type crystals (main peaks in po... | 08/12/2008 |
| 7402695 | Method of separately collecting optically active amino acid amide and optically active amino acid A method for separately collecting an optically active amino acid amide and an optically active amino acid from an aqueous solution containing same, together with at least one member selected from the group consisting of an acid, a base, and a salt, includes a step ... | 07/22/2008 |
| 7378545 | Crystallization of amino acids using ultrasonic agitation A method for reducing the particle size of amino acid crystals using ultrasound is discussed. ... | 05/27/2008 |
| 7220435 | Process for the production of glycine enriched NaCI crystals with improved flow The present invention relates to a simple, economical, and efficient cyclic process for producing rhombic dodecahedron shaped glycine enriched, free flowing common salt from brine, said process comprising steps of adding glycine of concentration ranging between 10 t... | 05/22/2007 |
| 7161029 | DiL-lysine monosulfate trihydrate crystal and method of making A diL-lysine monosulfate trihydrate crystal which has a large tabular form and is more easily separable from the mother liquor. The crystal is obtained by a novel process of conducting crystallization at a lower temperature. ... | 01/09/2007 |
| 7084298 | Method for producing n-phosphonomethyl iminodiacetic acid The present invention relates to a process for the preparation of N-phosphonomethyliminodiacetic acid by reacting an alkali metal salt of iminodiacetic acid with phosphorus trichloride in aqueous solution with formation of the hydrochloride of iminodiacetic acid, ph... | 08/01/2006 |
| 7056450 | Highly concentrated aqueous solutions of N,N-dialkyl-glycines and process for preparation thereof An aqueous high-concentration solution of N,N-dialkylglycine, economical, easy to handle, and useful for subsequent organic chemical reactions, is provided. Also is provided a process for production thereof. The aqueous high-concentration solution of N,N-dialkylglyc... | 06/06/2006 |
| 7057038 | Kinetic resolutions of chiral 2- and 3-substituted carboxylic acids One aspect of the present invention relates to a method for the kinetic resolution of racemic and diastereomeric mixtures of chiral compounds. The critical elements of the method are: a non-racemic chiral tertiary-amine-containing catalyst; a racemic or diastereomer... | 06/06/2006 |
| 7034177 | Process of making phosphordiamidite compounds A process of producing cyanoalkyl tetraalkylphosphordiamidites at least substantially free of amine hydrohalide with improved storage stability. ... | 04/25/2006 |
| 7009076 | Process for recovering betaine The invention relates to a separation process of fractionating a solution comprising betaine and sucrose by subjecting said solution to chromatographic fractionation and nanofiltration and recovering a fraction enriched in betaine and optionally a fraction enriched ... | 03/07/2006 |
| 6949658 | Process for producing optically active α-amino acid and optically active α-amino acid amide The present invention provides a process for efficiently producing an optically active α-amino acid and an optically active α-amino acid amide. After contacting with cells or processed cells thereof having an ability to asymmetrically hydrolyse, a water solvent is... | 09/27/2005 |
| 6881861 | Method of purifying glutamic acid by transition recrystallization Disclosed herein is a method of purifying L-glutamic acid by transformation recrystallization which method comprises maintaining crude crystals of L-glutamic acid containing α crystals of L-glutamic acid in an aqueous solvent at a temperature of from 50° C. to the... | 04/19/2005 |
| 6638360 | Methods for the separation of isomers Methods for the separation of chaotropic and kosmotropic enantiomers within a racemic mixture are provided. Such methods comprise differentially partitioning the enantiomers into stabilized microdomains of low density water and high density water abutting... | 10/28/2003 |
| 6576790 | Process for the preparation of gabapentin A process for the preparation of gabapentin starting from gabapentin hydrochloride, which comprises the following steps: preparing a gabapentin hydrochloride aqueous solution; adjusting the pH of the solution to or about to gabapentin isoelectric point by... | 06/10/2003 |
| 6548700 | Process for the precipitation of cystine A process for precipitating cystine from a solution in sulfuric acid, includes forming a mixture of a solution of cystine in aqueous sulfuric acid and of an aqueous solution of a base by simultaneous metering the cystine solution and the aqueous base solu... | 04/15/2003 |
| 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. methyl benzoate, benzonitrile) containing at least water (e.g. ... | 02/04/2003 |
| 6495716 | [S,S]-ethylenediamine-N,N'-disuccinic acid crystal with high bulk density and process for obtaining the same Crystals of [S,S]-ethylenediamine-N,N'-disuccinic acid which have a bulk density of 0.45 to 1.2 g/cm3, and a process for obtaining these crystals comprising the steps of adjusting an aqueous solution of an [S,S]-ethylenediamine-N,N'-disuccinic ... | 12/17/2002 |
| 6479700 | Method for separating a basic amino acid from fermentation broth This invention relates to a method for separating basic amino acids from fermentation broth comprising contacting the broth with strong acid cation exchange resins that have a low degree of cross-linkage and eluting the amino acid. The method described he... | 11/12/2002 |
| 6414189 | Crystals of [S,S]-ethylenediamine-N,N'-disuccinic acid with high bulk density and method of obtaining the same Crystals of [S,S]-ethylenediamine-N,N'-disuccinic acid which have a bulk density of 0.45 to 1.2 g/cm3, and a process for obtaining these crystals comprising the steps of adjusting an aqueous solution of an [S,S]-ethylenediamine-N,N'-disuccinic ... | 07/02/2002 |
| 6392094 | Method for recovering amino acids A method for recovering amino acids, which comprises supplying a mixed solution containing inorganic acid salts, amino acids and non-electrolytes such as saccharides to a first-step resin layer comprising an Na type or K type strongly acidic ion exchange ... | 05/21/2002 |
| 6310242 | Process for preparing D-alloisoleucine and intermediates for preparation Disclosed are a novel process for preparing D-alloisoleucine and an improved process for epimerizing L-isoleucine to prepare D-alloisoleucine. In the former process, (2S, 3S)-tartaric acid derivative of formula I below; wherein R stands for a hydrogen ato... | 10/30/2001 |
| 6306344 | Method for retaining or enriching γ-aminobutyric acid in green grass leaves The present invention provides a method for retaining or enriching γ-aminobutyric acid in green grass leaves, which comprises the step of subjecting green grass leaves or processed products thereof to at least one treatment selected from the group consis... | 10/23/2001 |
| 6171501 | Process for the separation of amino acids and their salts from an aqueous solution The invention provides a process for the separation of amino acids and their salts from impurities contained in an aqueous feed solution containing the same, the process comprising: a) bringing the feed solution into contact with a substantially immiscibl... | 01/09/2001 |
| 6090979 | Process for the production of vinyl-GABA The present invention is directed to a method for producing vinyl GABA by submitting 5-vinylpyrrolidin-2-one to a basic hydrolysis.... | 07/18/2000 |
| 6077971 | Method for purifying homocystine Disclosed is a method for purifying homocystine comprising treating crude homocystine with a base, a method for purifying homocystine comprising recovering homocystine by neutralizing an alkaline aqueous solution of crude homocystine with an acid, and a h... | 06/20/2000 |
| 6072083 | Method for purifying branched chain amino acids A method for purifying an amino acid selected from the group consisting of valine, leucine and isoleucine easily in high yield and with high purity using an inexpensive precipitant, comprising allowing p-ethylbenzenesulfonic acid or its water-soluble salt... | 06/06/2000 |
| 6071728 | Process for the production of crystalline aspartic acid The invention provides a process for the preparation of aspartic acid via a fermentation process for the preparation of ammonia fumarate, wherein the pH of the fermentation broth is controlled by the addition of a calcium base to produce a calcium fumarat... | 06/06/2000 |
| 6005148 | Supported catalysts A supported catalyst comprising a support, an anchoring agent such as a heteropoly acid or anion, and a metal complex which is useful in a wide variety on organic reactions, especially the hydrogenation of substituted ,ଲ unsaturated acids and... | 12/21/1999 |
| 5907057 | Production of D,L-aspartic acid The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aque... | 05/25/1999 |
| 5892112 | Process for preparing synthetic matrix metalloprotease inhibitors Synthetic mammalian matrix metalloprotease inhibitors are disclosed that are useful for treating or preventing diseases wherein said diseases are caused by unwanted mammalian matrix metalloprotease activity and include skin disorders, keratoconus, resteno... | 04/06/1999 |
| 5872285 | Production of D,L-aspartic acid The present invention is directed to a method for the production of D,L-aspartic acid. The method comprises reacting an unsaturated dicarboxylic acid or anhydride, such as, maleic acid, fumaric acid, maleic anhydride, or mixtures thereof, with excess aque... | 02/16/1999 |
