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| Number | Title | Issue Date |
| 8183411 | Process for preparing 6-hydroxycaproic esters The present application relates to an improved process for preparing 6-hydroxycaproic esters from the by-product mixtures which are obtained in the oxidation of cyclohexane to cyclohexanol and cyclohexanone with oxygen or oxygen-comprising gas mixtures. ... | 05/22/2012 |
| 8076511 | Preparative-scale separation of enantiomers of chiral carboxylic acids High yields and purity are obtained in the purification of enantiomers of chiral carboxylic acids by preparative-scale chromatography by including a tertiary alcohol in the mobile phase in conjunction with an acidic modifier and a hydrophobic solvent. The tertiary a... | 12/13/2011 |
| 7439392 | Separation of citric acid from gluconic acid in fermentation broth using a weakly or strongly basic anionic exchange resin adsorbent Citric acid is separated from a fermentation broth containing gluconic acid by using an adsorbent comprising a water-insoluble, macroreticular or gel, strongly or weakly basic anionic exchange resin possessing quaternary or tertiary amine functional groups, said a a... | 10/21/2008 |
| 7439391 | Multi-stage glycolic acid crystallization The present invention relates to a high yield process to prepare high purity crystalline glycolic acid using a multi-loop crystallization process characterized by high liquid and/or solid recycle, said process suitable for large scale purification and producing high... | 10/21/2008 |
| 7410556 | Purification of aqueous solutions of organic acids The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/1 or less, preferably 250 g car... | 08/12/2008 |
| 7364880 | Integration of at least two processes to re-use acid The invention relates to integrating at least two processes that use at least one acid, wherein one process utilizes an ion-exchange purification step. ... | 04/29/2008 |
| 7361273 | Separation of sugars, sugar alcohols, carbohydrates and mixtures thereof The present invention relates to a method of separating sugars and sugar alcohols from each other. More particularly the present invention relates to the use of a weakly basic anion exchange resin in a chromatographic separation process. The advantage of the present... | 04/22/2008 |
| 7358384 | Processes for the recovery of optically active diacyltartaric acids When a salt of an amine and an optically active diacyltartaric acid, or a diastereomer salt of an optically active amine and an optically active diacyltartaric acid, obtained by optically resolving a racemic amine using the optically active diacyltartaric acid, is s... | 04/15/2008 |
| 7335248 | Marine antifouling coating compositions Disclosed are marine coating compositions that are useful to inhibit the fouling of a marine structure by a broad spectrum of organisms. Generally, the marine coating composition comprises an antifouling agent and an organic vehicle. ... | 02/26/2008 |
| 7332085 | Method for the purification of an α-hydroxy acid on an industrial scale The present invention relates to a method for the purification of an α-hydroxy acid on an industrial scale, in which the method involves: (a) subjecting an aqueous stream containing mainly α-hydroxy (1) to an extraction step, with the formation of an aqueous place... | 02/19/2008 |
| 7326550 | Yeast strains for the production of lactic acid Yeast strains transformed with at least one copy of a gene coding for lactic dehydrogenase (LDH) and further modified for the production of lactic acid with high yield and productivities, are described. ... | 02/05/2008 |
| 7311837 | Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate In a process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate, the same are mixed with water and the potassium hydrogentartrate is dissolved. The process is improved in that the suspension is decanted, the cl... | 12/25/2007 |
| 7279598 | Process for separating and recovering 3-hydroxypropionic acid and acrylic acid Disclosed is a process for separating and recovering 3-hydroxypropionic acid from an aqueous solution comprising 3-hydroxypropionic acid and acrylic acid, comprising counter current extracting the aqueous solution with ethyl acetate extractant. Further disclosed is ... | 10/09/2007 |
| 7253315 | Process for preparing fluorocarboxylic acids A fluorocarboxylic acid preparation process which includes hydrolyzing fluorocarboxylic acid fluoride in the presence of an aqueous sulfuric acid solution to form a reaction product containing a fluorocarboxylic acid and hydrogen fluoride (present as hydrofluoric ac... | 08/07/2007 |
| 7244596 | Separation of biomass from lactic-acid containing fermentation products by means of flocculation The present invention is in the field of the preparation of lactic acid by means of fermentation, more particularly it is directed to processes to separate the biomass from the lactic acid-containing fermentation product by means of flocculation. We have foun... | 07/17/2007 |
| 7241918 | Separation of citric acid from gluconic acid in fermentation broth using a weakly or strongly basic anionic exchange resin adsorbent Citric acid is separated from a fermentation broth containing gluconic acid by using an adsorbent comprising a water-insoluble, macroreticular or gel, strongly or weakly basic anionic exchange resin possessing quaternary or tertiary amine functional groups, said a a... | 07/10/2007 |
| 7238837 | Process for the recovery of lactic acid from aqueous lactate salt solutions, involving the use of ion exchangers The invention provides a process for the recovery of lactic acid from aqueous solutions containing at least one water-soluble lactate salt and having a pH of about between 4 and 14, comprising the steps of: contacting said aqueous solution with a cation exchanger wh... | 07/03/2007 |
| 7223885 | Method for the purification of a-hydroxy acids on an industrial scale The present invention relates to a method for the purification of an α-hydroxy acid on an industrial scale, in which an α-hydroxy acid with a color (fresh) of not more than 10,000 APHA units is subjected to (a) a crystallization step followed by (b) a distillation... | 05/29/2007 |
| 7208615 | Triple mineral salts of (-)-hydroxycitric acid and processes for preparing the same This invention relates to novel triple salts of (−)-hydroxycitric acid having the general formula 1 wherein X, Y are selected from zinc or group IIA metal and Z is selected from group IA metal of the Periodic T... | 04/24/2007 |
| 7186856 | Process for preparing carboxylic acids and derivatives thereof Processes for preparing carboxylic acids and derivatives thereof in which an ammonium salt of the carboxylic acid is heated in the presence of an organic reagent to split the salt and form the acid or, where the organic reagent is an esterifying agent, the correspon... | 03/06/2007 |
| 7164040 | Process for production of high-purity crystals of glycolic acid A method for producing high purity glycolic acid crystals, which comprises the steps of: (1) providing an aqueous glycolic acid solution (A) which has (a) a water content of from 5 to 20% by weight, (b) a calculated monomeric glycolic acid weight ratio (ratio of the... | 01/16/2007 |
| 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 conducted at a pH of 4.8 or lower. The techniques generally concern the prov... | 12/05/2006 |
| 7126016 | Process for preparing fluorocarboxylic acids A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid ... | 10/24/2006 |
| 7109373 | Creatine salts and method of making same Disclosed are creatine salts having the general formula wherein A represents an anion of a dicarboxylic acid, and a process of making such salts. ... | 09/19/2006 |
| 7049108 | Processes for producing lactic acid using yeast transformed with a gene encoding lactate dehydrogenase Yeast strains transformed with at least one copy of a gene coding for lactic dehydrogenase (LDH) and further modified for the production of lactic acid with high yield and productivities, are described. ... | 05/23/2006 |
| 7034180 | Method for crystallization of hydroxycarboxylic acids The invention aims at producing high-purity crystals of a hydroxycarboxylic acid represented by the following formula (1): in high yield. Provided are a method for crystallization of a compound (1) which compris... | 04/25/2006 |
| 7026507 | Method for the production of solid formulations of sodium 3-hydroxy-3-methylbutyrate A process for preparing solid formulations of sodium 3-hydroxy-3-methylbutyrate of the formula in which, in a first process step, 4,4-dimethyloxetan-2-one is reacted with aqueous sodium hydroxide to form a solution of s... | 04/11/2006 |
| 7026145 | Process for producing a purified lactic acid solution The present disclosure provides a process for preparing a purified lactic acid solution suitable for use in connection with a source of lactate material a pH within the range of 0.8 to 9.0. The process includes the steps of providing a source of lactate material whi... | 04/11/2006 |
| 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 at least 5%, the process comprising the steps of: extracting at least... | 03/28/2006 |
| 7001625 | Solid phase synthesis of salts of organic acids including butyric acid A process for the solid-phase synthesis of salts of organic acids in a granular, free-flowing, and dust-free form particularly suited for use as animal feed additives. A mixture of liquid organic acids, including butyric acid, is applied to an inert, absorbent carri... | 02/21/2006 |
| 7002039 | Method for the purification of an alpha-hydroxy acid on an industrial scale The invention relates to a method for the purification of a fermentatively prepared α-hydroxy acid on an industrial scale, in which an α-hydroxy acid with a color (fresh) of not more than 10,000 APHA units is subjected to at least two crystallization steps, with t... | 02/21/2006 |
| 6986909 | Solid phase synthesis of salts of organic acid A process for the solid-phase synthesis of salts of organic acids in a granular, free-flowing, and dust-free form particularly suited for use as animal feed additives. A liquid organic acid is applied to an inert, absorbent carrier. A solid base is then added during... | 01/17/2006 |
| 6967257 | Method of purifying lactic acid esters The invention relates to a method of purifying lactic acid esters, wherein an impure lactic acid ester is subjected to a melt crystallization. The impure lactic acid contains not more than 10 wt. % of impurities, based on the total amount of ester, and has a chiral ... | 11/22/2005 |
| 6951956 | Crystalline polyglycolic acid, polyglycolic acid composition and production process thereof Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2 is not lower than 35° C., and a difference between the crystallization temperature Tc1 and the glass transition temperature... | 10/04/2005 |
| 6942803 | Process for purifying an organic acid A process is disclosed for purifying an aqueous feed stream comprising a product organic acid, such as lactic acid, and a strong contaminant, such as pyruvic acid or oxalic acid. The molar concentration of the product organic acid in the feed stream typically is at ... | 09/13/2005 |
| 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 ammonium salt, or an alkylamine-organic acid complex. The feed stream is mix... | 08/09/2005 |
| 6903234 | Method of making a calcium salt of 2-hydroxy-4-(mercaptomethyl) butanoic acid A method of making calcium-2-hydroxy-4-(mercaptomethyl)butanoate includes combining and mixing 2-hydroxy-4-(mercaptomethyl)butanoic acid and a calcium salt selected from calcium oxide and calcium hydroxide and water in a first reaction zone. The combining and mixing... | 06/07/2005 |
| 6902917 | Process for recovery of organic acids from fermentration broths The present invention relates to a process for the recovery of an organic acid from a fermentation broth which comprises drying the fermentation broth to obtain a dried product, adding the dried product to a lower alcohol in the presence of an acid, and then removin... | 06/07/2005 |
| 6864389 | Method for producing α-hydroxycarboxylic acid The present invention relates to: a method for producing α-hydroxycarboxylic acid, which comprises hydrolyzing cyanohydrin in the presence of a hydrocarbon solvent; a method for producing optically active α-hydroxycarboxylic acid, which c... | 03/08/2005 |
| 6815560 | Process for the preparation of hydroxymethylbutyric acid The invention relates to a new process for the preparation of hydroxymethylthiobutyric acid by sulphuric hydrolysis of hydroxymethylthiobutyronitrile. ... | 11/09/2004 |
