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7550541 |
Resin composition and molded article, film and fiber each comprising the same
Disclosed are a resin composition comprising a polylactic acid resin and a polyacetal resin, and such a resin composition in which the polylactic acid resin and the polyacetal resin are kept...
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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...
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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...
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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...
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7211693 |
Preparation 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.
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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...
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7154000 |
Methods 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...
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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...
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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...
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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...
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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...
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6984293 |
Azeotropic 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...
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6982026 |
Azeotropic 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...
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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...
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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...
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6777213 |
Isolation 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...
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6670505 |
Process 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...
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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...
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6652820 |
Methods 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...
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6639098 |
Methods 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...
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6632966 |
Method 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...
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6630603 |
Method 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...
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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...
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6534679 |
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...
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6518454 |
Preparation 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...
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6489508 |
Method 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...
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6472559 |
Lactic 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...
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6395926 |
Process 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...
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6384276 |
Process for the preparation of lactic acid by evaporative crystallisation
The invention relates to a process for the preparation of high purity lactic acid from an aqueous solution containing said acid in the form of salt(s), characterised in that the aqueous solution is...
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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...
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6316668 |
Acid sorption regeneration process using carbon dioxide
Carboxylic acids are sorbed from aqueous feedstocks onto a solid adsorbent in the presence of carbon dioxide under pressure. The acids are freed from the sorbent phase by a suitable regeneration...
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6291708 |
Process for production of organic acids and esters thereof
A process is disclosed for producing an organic acid and optionally for simultaneously producing an ester of the organic acid. The process comprises the steps of: (a) combining an aqueous diluent,...
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6262313 |
Thermal conversion of fatty acid salts to ketones
This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container,...
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6191308 |
Process for the manufacture of oxygenates
α-Hydroxycarbonyl compounds are obtained from aldehydes or ketones by forming an acetal or ketal which is decomposed to a vinyl ether. The ether is selectively oxidized under conditions yielding...
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6160173 |
Process for the recovery of lactic acid esters and amides from aqueous solutions of lactic acid and/or salts thereof
The invention provides a process for the recovery of purified lactic acid values from an aqueous feed solution containing lactic acid, lactic acid salt, or mixtures thereof, comprising: bringing...
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6114577 |
Desorption process and apparatus
Described are preferred processes and apparatuses for thermally desorbing desired chemical products from resins to which they are adsorbed. The processes and apparatuses provide highly efficient...
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6111137 |
Purification process of lactic acid
A process for treating pyruvic acid and other impurities of lactic acid by reduction treatment of an aqueous lactic acid solution and for obtaining high quality lactic acid having a substantially...
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6107525 |
Process for the manufacture of hydroxycarbonyl compounds
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6087532 |
Process for isolating lactic acid
A process for the production of lactic acid and for the separation and/or recovery of lactic acid from a lactate feed solution. A lactate feed solution preferably obtained from a fermentation broth...
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6066763 |
Process for preparing free α-hydroxy acids from ammonium salts thereof
A process for preparing α-hydroxy acids by heating ammonium salts of α-hydroxy acids of general formula (I), removing the formed ammonia and water, adding water to the residue, and heating the...
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6060622 |
Methods of reproducing lactic acid components by using lactic acid based by-products
A lactic acid based by-product formed in a process of producing a lactic acid based composition is subjected to racemization in the presence or absence of a catalyst to thereby obtain a lactic acid...
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6043392 |
Method for conversion of biomass to chemicals and fuels
This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container,...
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6022992 |
Acid-salt metathetic process
A cation exchange membrane mediated acid-salt metathetic process. An aqueous salt solution is placed into a first compartment on one side of the membrane together with an organic amine extractant...
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5969189 |
Thermal conversion of volatile fatty acid salts to ketones
This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container,...
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5965771 |
Regeneration of carboxylic acid-laden basic sorbents by leaching with a volatile base in an organic solvent
Carboxylic acids are sorbed from aqueous feedstocks onto a solid adsorbent. The acids are freed from the sorbent phase by treating it with an organic solution of alkylamine thus forming an...
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5959144 |
Process for the recovery of lactic acid
The invention provides a process for the recovery of lactic acid from an aqueous liquor containing water and calcium lactate, comprising the extraction step of combining the lactate aqueous liquor...
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5789186 |
Marker for cerebral apoplexy
A sample is treated with a phosphoglyceric acid mutase (PGAM) inhibitor (polythionic acid (salt) such as potassium tetrathionate) to inactivate the M-type isozyme activity and the B-type PGAM is...
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5780276 |
Recovery of carboxylic acid from organic solution that contains an amine and an extraction enhancer
Recovery of carboxylic acid from an amine-based, water-immiscible organic extractant solution thereof that contains an enhancer, by extraction of the acid into an aqueous phase. A low molecular, at...
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5759796 |
Method for the determination of lactic acid in organic materials of alimentary interest and biosensor for putting this method into effect
A method is described for the determination of lactic acid in organic materials of alimentary interest that involves reacting, in a buffered aqueous medium, a sample of the said materials, or a...
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5681728 |
Method and apparatus for the recovery and purification of organic acids
The present invention relates to methods and apparatus for reducing the fouling of ion-selective membranes used in the electrodialytic purification of organic acids. More particularly, the present...
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