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| Number | Title | Issue Date |
| 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 |
| 7141154 | Single-stage separation and esterification of cation salt carboxylates using electrodeionization A method of and apparatus for continuously making an organic ester from a lower alcohol and an organic acid is disclosed. An organic acid or salt is introduced or produced in an electrode ionization (EDI) stack with a plurality of reaction chambers each formed from ... | 11/28/2006 |
| 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 |
| 6800185 | Method for producing basic amino acid solution Herein are disclosed a method for producing a basic amino acid solution which comprises subjecting a solution of a basic amino acid salt to electrodialysis with the use of an electrodialyser equipped with cation exchange membranes and anion exchange membranes in com... | 10/05/2004 |
| 6797140 | Electrodeionization method An electrodeionization method for continuously producing and or separating and/or concentrating ionizable organics present in dilute concentrations in an ionic solution while controlling the pH to within one to one-half pH unit method for continuously producing and ... | 09/28/2004 |
| 6770189 | Process for improving the purity of quaternary ammonium hydroxides by electrolysis The present invention relates to a process for improving the purity of a composition comprising a quaternary ammonium hydroxide comprising the steps of (a) providing an electrolysis cell which comprises an anolyte compartment containing an anode, a catholyte compart... | 08/03/2004 |
| 6755951 | Electrodialysis of salts for producing acids and bases An electrodialysis cell is operated in the presence of organic compounds that binds or chelates with the multivalent metals to form a metal chelating buffer. Among other things, this binding or chelating reduces power consumption, produces a stable cell operation, a... | 06/29/2004 |
| 6551803 | Method for purification of amino acid containing solutions by electrodialysis A process is described for purifying an amino acid-containing solution by means of electrodialysis, wherein an amino acid-containing solution is employed which is obtained from the fermentation for producing at least one amino acid.... | 04/22/2003 |
| 6541228 | Electrodialysis methods for purification and recovery of gluconic acid derivatives A process for purifying and concentrating a gluconic acid derivative, such as 2-keto-L-gulonic acid, comprising introducing a non-viable and/or acidified fermentation medium or an in-vitro reactor medium comprising at least the gluconic acid derivative an... | 04/01/2003 |
| 6537436 | System for electrodialysis treatment of liquids An electrodialysis treatment system utilizing a plurality of disparate layers of an electrodialysis cell stack for separation of components in liquid mixtures. The system for electrodialysis treatment for purification and deionizing liquids includes provi... | 03/25/2003 |
| 6527931 | Process for producing an amino acid-N, N-diacetic acid and its salts An amino acid-N,N-diacetic acid (AADA) or its salt with an equivalent or less of an alkali metal is produced by reducing, through electrodialysis, alkali metal ions from an aqueous solution of the alkali metal salt of an AADA. By this configuration, an AA... | 03/04/2003 |
| 6517700 | Process for the removal of heat stable amine salts A process is disclosed for removing heat stable amine salts using an electrodialysis process. The process of the present invention can be used to reduce the level of heat stable salts in a lean solvent stream in an acid gas removal process. A base is adde... | 02/11/2003 |
| 6471844 | Process for the isolation of aromatic hydroxycarboxylic acids Processes are provided for the electrodialysis of a (di)alkali metal salt of an aromatic hydroxycarboxylic acid to produce a free aromatic hydroxycarboxylic acid and the alkali metal hydroxide, in the presence of a selected alkali metal salt. These variou... | 10/29/2002 |
| 6444108 | Process for isolation of dicarboxylic acids and hydroxycarboxlic acids A first process involves the partial electrodialysis of a dialkali metal salt of an aromatic hydroxycarboxylic acid or a dicarboxylic acid to produce the approximate monoalkali metal salt and the alkali metal hydroxide. The monoalkali metal salt is then t... | 09/03/2002 |
| 6319382 | Fermentative production and isolation of lactic acid A method for fermentation of lactic acid from a sugar-containing fermentation liquid in a fermentor by means of lactic acid-forming bacteria, in which whey protein is present or is added as a nutrient substrate for the lactic acid-forming bacteria, wherei... | 11/20/2001 |
| 6312578 | Method for extracting amine compounds from a liquid medium The invention concerns a method for extracting by electrodialysis a compound comprising at least amine functions capable of protonation from a liquid medium. More particularly it concerns a method for extracting, and separating at least the monomers compr... | 11/06/2001 |
| 6294066 | Apparatus and process for electrodialysis of salts An apparatus and the process produces salts by an electrodialysis operation. The basic electrodialysis apparatus is a cell having a number of compartments separated by membranes. A DC source is connected to drive a current through a feed stream passing th... | 09/25/2001 |
| 6284116 | Process for treating aqueous solutions comprising bases and organic acids Bases and organic acids are simultaneously separated from aqueous solutions comprising bases and organic acids by electrochemically treating aqueous solutions containing these components, particularly the aqueous waste solution obtained from an aldolizati... | 09/04/2001 |
| 6280593 | Process for separating off organic acids from aqueous solutions The present invention relates to a process for separating organic acids from aqueous solutions by the use of electrochemical processes such as electrolysis and electrodialysis. These processes can be used, for example, to purify aqueous solutions produced... | 08/28/2001 |
| 6224731 | Apparatus and process for electrodialysis of salts An apparatus and process produces salts by an electrodialysis operation. The basic electrodialysis apparatus is a cell having a number of compartments separated by membranes. A DC source is connected to drive a current through a feed stream passing throug... | 05/01/2001 |
| 6221225 | Apparatus and process for electrodialysis of salts An apparatus and process produces salts by an electrodialysis operation. The basic electrodialysis apparatus is a cell having a number of compartments separated by ion exchange membranes. A DC source is connected to drive a current through a feed stream p... | 04/24/2001 |
| 6214190 | Method for separating a catalyst by membrane electrodialysis The present invention relates to a process for isolating, by membrane electrodialysis, a catalyst from a solution containing it. More precisely, it relates to the isolation of a catalyst used in a homogeneous phase molecular oxidation reaction. The invent... | 04/10/2001 |
| 6187570 | Electrodialysis methods for purification and recovery of gluconic acid derivatives A process for purifying and concentrating a gluconic acid derivative, such as 2-keto-L-gulonic acid, comprising introducing a non-viable and/or acidified fermentation medium or an in-vitro reactor medium comprising at least the gluconic acid derivative an... | 02/13/2001 |
| 6162340 | Membrane filtration of polymer containing solutions In a method for recovering polymers in a substantially pure form from a solution containing the polymers, the solution is first treated with a reactant (e.g. an acid, a sequestrant or a mixture of both) to form the free polymers and salts of the reactant.... | 12/19/2000 |
| 6159352 | Process for the electrochemical synthesis of N-acetylcysteine from cystine The process comprises: (A) obtainment of N-acetyl-cysteine from L-cystine, by means of the following steps: (i) acetylation of L-cystine to produce N-acetyl-cystine; (ii) electroreduction and desalination by electrodialysis of the N-acetyl-cystine thus produce... | 12/12/2000 |
| 6110342 | Process for production of amino acid hydrochloride and caustic via electrodialysis water splitting The invention uses a stack of three compartment electrodialysis cells in a process for the production amino acid hydrochloride and an alkali. The electrodialysis cell contains bipolar, cation and anion membranes which are arranged to form acid, base and s... | 08/29/2000 |
| 6036830 | Desalination of aqueous sulphonamide solutions In order to remove the salts (in particular NH4 Cl) present in an aqueous sulphonamide solution (in particular CH3 SO2 NH2), the solution is subjected to a two-compartment electrodialysis. By maintaining the pH ... | 03/14/2000 |
| 6017433 | Desalting aqueous streams via filled cell electrodialysis The invention is a process for desalting aqueous solutions, which are initially acidified to a pH of about 3 or less. Then, the acidified solution is fed into a desalting compartment of an electrodeionization cell which contains a suitable ion exchange ma... | 01/25/2000 |
| 5968338 | Process for recovering onium hydroxides from solutions containing onium compounds In one embodiment, the present invention relates to a process for recovering an onium hydroxide from a solution containing an onium compound, including contacting the solution with a cation exchange material so that at least a portion of onium cations fro... | 10/19/1999 |
| 5938907 | Method for recovering guanidine salts A process for recovering guanidine salts from diluted and contaminated aqueous solutions is described, wherein the corresponding aqueous solution (diluate) is subjected to electrodialysis and the guanidine salt is concentrated on the concentrate side. The... | 08/17/1999 |
| 5928485 | Process for isolation of dicarboxylic acids and hydroxycarboxylic acids A first process involves the partial electrodialysis of a dialkali metal salt of an aromatic hydroxycarboxylic acid or a dicarboxylic acid to produce the approximate monoalkali metal salt and the alkali metal hydroxide. The monoalkali metal salt is then t... | 07/27/1999 |
| 5910237 | Process for recovering organic hydroxides from waste solutions In one embodiment, the present invention relates to a process for recovering organic hydroxide from contaminated solutions containing the organic hydroxide and impurities including charging the contaminated solution to a first electrochemical cell contain... | 06/08/1999 |
| 5904823 | Methods of purifying hydroxylamine solutions and converting hydroxylamine salts to hydroxylamine In one embodiment, the present invention provides a method of preparing hydroxylamine from a hydroxylammonium salt solution, including providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and an anion selective mem... | 05/18/1999 |
| 5876579 | Electrodialysis treatment A process for reducing the content of organic and inorganic halogen in an aqueous solution of a nitrogen-containing epihalohydrin-based resin, in which process the aqueous resin solution is subjected to an electrodialysis treatment. The aqueous resin solu... | 03/02/1999 |
| 5868916 | Process for recovering organic hydroxides from waste solutions In one embodiment, the present invention relates to a process for recovering an organic hydroxide from waste solutions containing the organic hydroxide and impurities including the steps of precipitating the organic hydroxide from the waste solution as an... | 02/09/1999 |
| 5851372 | Process for demineralizing a liquid containing organic matter and salts in solution A process of demineralizing a liquid containing organic matter and inorganic salts in solution, in which the treatment of the liquid comprises the following steps: the liquid is percolated over a strong cationic ion exchange resin for monovalent ions; bot... | 12/22/1998 |
| 5849984 | Method and system for treating waste nitrocellulose A method for treating waste nitrocellulose, the method comprising the steps f treating nitrocellulose with acid in a hydrolysis process to break the nitrocellulose down to glucose, recovering a majority of the acid by electrodialysis, neutralizing a remain... | 12/15/1998 |
| 5814498 | Process for the recovery of organic acids and ammonia from their salts A process recovers organic acid and ammonia from their salts preferably obtained from microbial fermentation of a saccharide in a nutrient. The fermented materials is passed through a nanofiltration or a chelating resin ion-exchange bed or a combination o... | 09/29/1998 |
| 5814197 | Electrodialysis including filled cell electrodialysis (electrodeionization) Improved electrodialysis (ED) stacks are disclosed having one or more components selected from the group: a) cation exchange membranes having ion exchange groups predominantly sulfonic acid groups and a minor amount of weakly acidic and/or weakly basic gr... | 09/29/1998 |
| 5772013 | Method and apparatus for producing di- and more highly oxidized carboxylic acids A method is disclosed for producing di- and more highly oxidized carboxylic acids from a compound selected from a first group consisting of carbohydrates, carbohydrate derivatives and carbohydrate derivatives having more than one primary alcohol group, co... | 06/30/1998 |
