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Class 562/589 - Lactic acid per se or salt thereof


Subclass of Class 562 - Organic compounds -- part of the class 532-570 series
Definition: The compound which is lactic acid (structure below) or
No. of patents: 147
Last issue date: 05/25/2010


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NumberTitleIssue Date
7723540Method and apparatus for producing polyhydroxy carboxylic acid
The object is to provide a method and apparatus for producing a polyhydroxy carboxylic acid according to which an annular dimer can be efficiently obtained in the production of polyhydroxy carboxylic acid which is small in distribution breadth of molecular weight in...
05/25/2010
7705180Process for the preparation of lactic acid or lactate from a magnesium lactate comprising medium
The present invention relates to an improved process for the preparation of lactic acid and or lactate from a magnesium lactate comprising medium. In said process, magnesium lactate is reacted with a hydroxide of sodium, calcium, and/or ammonium at a pH range betwee...
04/27/2010
7332085Method 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
7326550Yeast 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
7244596Separation 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
7238837Process 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
7223885Method 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
7211693Preparation of lactic acid derivatives and their use
The present invention relates to preparing lactic acid derivatives that are useful as odorants and monomers for polymer synthesis. ...
05/01/2007
7186856Process 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
7182921Cylindrical steam reforming unit
A cylindrical steam reforming unit contains a plurality of cylindrical bodies consisting of a first cylindrical body, a second cylindrical body and a third cylindrical body of successively increasing diameters disposed in concentric spaced relationship, a radiation ...
02/27/2007
7154000Methods of using polylactate release compounds
The preferred embodiments provide for a family of novel compositions to serve as substrates that release hydroxy acid slowly over time. Preferably the hydroxy acid is an α-hydroxy acid, more preferably it is lactic acid. The compositions are preferably made by reac...
12/26/2006
7144977Lactic 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
7108820Resin molded article and production method thereof
A resin molded article and a production method thereof, including the processes of heat-molding a molding material containing a biodegradable resin and a reinforcing fiber or a biodegradable resin, a reinforcing fiber after controlling a water content thereof, or no...
09/19/2006
7049108Processes 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
7026145Process 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
7019170Process 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
7001625Solid 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
6991812Agent for preventing, improving or treating hypertension
The invention relates to an agent for preventing, improving or treating hypertension, which exhibits a hypotensive effect, inhibits the rise of blood pressure and improves hypertension, and food for preventing or improving hypertension, which does not become a burde...
01/31/2006
6986909Solid 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
6984293Azeotropic distillation of cyclic esters of hydroxy organic acids
Cyclic esters of hydroxy organic acids can be produced and recovered via azeotropic distillation. In certain embodiments cyclic esters, such as glycolide and lactide, can be produced from a fermentation broth or other feed stream that contains a hydroxy organic acid...
01/10/2006
6982026Azeotropic distillation process for producing organic acids or organic acid amides
Disclosed herein are methods for the recovery of at least one of an organic acid or an organic acid amide, such as a heat stable lactic acid or lactamide, from a feed stream which contains the organic acid and/or organic acid amide. The feed stream is mixed with at ...
01/03/2006
6962968Purification of macrocyclic oligoesters
Acid impurities, such as carboxylic acid-terminated polymers, are removed from macrocyclic oligoesters with ion exchange resins, resulting in macrocyclic oligoesters that are substantially free of acid impurities. The ion exchange resins can be regenerated anew and ...
11/08/2005
6956139(1R, 2S, 5R)-3-1-menthoxyalkan-1-OL cooling sensate
A cooling sensate compound having the general formula (I): where n is an integer from 2 to 6. The compound is effective in imparting a refreshing and cooling sensation of long duration. A cooling sensate composition ha...
10/18/2005
6942803Process 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
6926810Process 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
6777213Isolation of carboxylic acids from fermentation broth
A process for recovering carboxylic acids from an aqueous mixture such as a fermentation broth using a solvent containing at least one olefin without the need for first removing the spent microorganism cells is provided. A co-solvent which increases the partition co...
08/17/2004
6747173Method for the preparation of lactic acid and calcium sulphate dihydrate
The invention relates to a method for the preparation of lactic acid and calcium sulphate, in which (a) an aqueous solution that contains lactate is reacted with sulphuric acid at a temperature that is essentially higher than the transition temperature of calcium su...
06/08/2004
6670505Process for the recovery of organic acids from aqueous solutions
A process for recovering a desired organic acid from a solution includes the steps of: providing an aqueous solution including at least one desired organic acid or its acid anion; adjusting the proton concentration in the aqueous solution to a desired lev...
12/30/2003
6667417Process 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 subsequent step with the medium to form a water soluble al...
12/23/2003
6652820Methods of making cesium salts and other alkali metal salts
A method of making a cesium salt is described and involves reacting a cesium sulfate containing solution with lime to form 1) a solution containing at least cesium hydroxide and 2) a residue comprising calcium sulfate. The method further involves removing...
11/25/2003
6641734Process 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 typic...
11/04/2003
6639098Methods of using polylactate release compounds
The preferred embodiments provide for a family of novel compositions to serve as substrates that release hydroxy acid slowly over time. Preferably the hydroxy acid is an ଱-hydroxy acid, more preferably it is lactic acid. The compositions are prefera...
10/28/2003
6632966Method for the preparation of lactic acid and calcium sulphate dihydrate
The invention relates to a method for the preparation of lactic acid and calcium sulphate, in which (a) an aqueous solution that contains lactate is reacted with sulphuric acid at a temperature that is essentially higher than the transition temperature of...
10/14/2003
6630603Method of industrial-scale purification of lactic acid
The present invention relates to a method of industrial-scale purification of lactic acid, the method including the steps of: (a) reduced-pressure distillation of a concentrated lactic acid solution having a total acid content of at least 95 wt % and a con...
10/07/2003
6627768Process 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 water-insoluble amine solvent, to recover acid therefrom an...
09/30/2003
6534679Lactic 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 conce...
03/18/2003
6518454Preparation of esters of carboxylic acids
Disclosed is a process wherein a solution of a carboxylic acid in a first solvent and an alcohol are fed to a simulated moving bed reactor (SMBR) containing a solid(s) to produce a first stream comprising a solution of an ester of the carboxylic acid and ...
02/11/2003
6489508Method for purifying lactic acid
The invention concerns a method for recuperating and purifying a lactic acid solution obtained initially from a fermentation medium or any other source, consisting in a pre-treatment to eliminate the ion loads capable of catalysing the lactic acid condens...
12/03/2002
6472559Lactic acid production, separation and/or recovery process
A process for the production and isolation of lactic acid is provided. A lactate feed solution, preferably obtained from a fermentation broth is combined with and extracted by a water-immiscible base in the presence of an acidifying agent. Lactic acid is ...
10/29/2002
6395926Process for recovering low-boiling acids
The invention provides a method for recovering low-boiling acids from a concentrated solution of the calcium salt of the acid by treating the concentrated solution of calcium salts of the low-boiling acids with a high molecular weight tertiary amine and c...
05/28/2002
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