| Patents for C01D 1 - Oxides or hydroxides of sodium, potassium, or alkali metals in general (1,372) |
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| 06/13/2001 | CN1298855A Process for recovering nitrogen-contained organic alkali |
| 06/07/2001 | WO2001040113A1 Process and apparatus for treating and regenerating spent aqueous solutions of caustic soda from purification and cleansing of petroliferous products |
| 05/30/2001 | EP1104004A2 Collector cup |
| 05/10/2001 | WO2001032298A1 Method for purification of amino acid containing solutions by electrodialysis |
| 05/10/2001 | DE19952961A1 Verfahren zur Aufreinigung von aminosäurehaltigen Lösungen durch Elektrodialyse A method for purification of amino acid-containing solutions by electrodialysis |
| 05/01/2001 | US6224731 Apparatus and process for electrodialysis of salts |
| 04/24/2001 | US6221225 Apparatus and process for electrodialysis of salts |
| 03/21/2001 | CN1288286A Improvement and application of magnetohydrodynamic generation technology |
| 03/13/2001 | US6200455 Electrolyzing an alkali metal salt solution forming hydrogen, chlorine and an at least 10% caustic solution, treating the casutic solution to create more concentrated solution while continuously magnetically removing metals in the solution |
| 03/07/2001 | EP1080776A2 Electrodialysis water splitting process |
| 01/16/2001 | US6173840 Beneficiation of saline minerals |
| 11/16/2000 | WO2000068496A1 Feeding device and process and feeding system which utilise the feeding device |
| 10/25/2000 | CN1270923A Non-stop cylinder washing technology for producing sodium carbonate evaportating and crystallizing natural soda |
| 10/25/2000 | CN1270922A Plate-frame filtering technology for purifying turbid solution of natural soda |
| 09/26/2000 | US6123826 Using at least two magnets to remove about one third of the nickel and/or iron present in a caustic solution |
| 09/19/2000 | US6120745 As a melt |
| 09/05/2000 | US6113657 Crystallizing naoh.3.5h2o (sodium hydroxide) from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated; separating formed crystals from solution using mechanical solid/liquid separation apparatus |
| 08/30/2000 | EP1030944A1 Method and device for removal of soda melt from a soda recovery unit |
| 08/29/2000 | US6110839 Dissolving metallic silicon and/or silicon compounds in an alkaline solution and neutralizing metallic ions in the alkaline solution by reaction products of hydrogen and silicates generated by reacting silicon and alkali |
| 08/29/2000 | US6110377 Placing rh.sup.+ type cation exchange resin in alkaline waste to complex insoluble sodium; separating resin charged with sodium and treating with lime and water; separating concentrated soda solution an using as digestion liquor |
| 08/29/2000 | US6110342 Process for production of amino acid hydrochloride and caustic via electrodialysis water splitting |
| 08/15/2000 | US6103210 Exposing to metal chloride to form an intermediary product comprising metal, oxygen, and chlorine; and removing the chlorine from the intermediary carbonaceous to produce a reaction product comprising carbon and metal |
| 07/18/2000 | CA2174674C Process for the regeneration of sodium hydroxide from sodium sulfide |
| 07/05/2000 | EP1016651A1 A process for simultaneous production of amino acid hydrochloride and caustic via electrodialytic water splitting |
| 07/05/2000 | CN1258639A Preparation of superfine aluminium hydroxide |
| 07/04/2000 | US6083475 Method for making lithiated metal oxide |
| 06/27/2000 | US6080299 Method for removal of nickel and iron from alkali metal hydroxide manufacturing process requiring the use of sodium borohydride |
| 05/31/2000 | CN1254682A Process for preparing both sodium hydroxide and sodium sulfate by secondary causticization of mother liquid from natural alkali carbonization |
| 05/25/2000 | WO2000029331A1 Layered lithium metal oxides free of localized cubic spinel-like structural phases and methods of making same |
| 05/25/2000 | WO2000029326A1 Method for production of magnesium hydroxide from sea water |
| 05/03/2000 | EP0891298B1 Method for recovering sodium from alkaline industrial waste |
| 03/21/2000 | US6039930 Reaction of metal chloride with graphite oxide to form metal, oxygen chlorine products |
| 02/22/2000 | US6026656 Crystallization by evaporation and vapor condensation |
| 01/12/2000 | EP0969964A1 A thermal storage and transfer device |
| 12/29/1999 | CN1047766C Equipment system for disphragm caustic soda evaporation technology |
| 11/30/1999 | US5993772 Method for coproducing calcium carbonate and sodium hydroxide |
| 11/10/1999 | CN1234370A Method for recovering waste liquid of industrial mixed alkali |
| 11/02/1999 | US5976349 Process for the removal of metal impurities by an electrochemical route |
| 09/22/1999 | CN1229059A Technology for producing single water lithium hydroxide using spodumene |
| 09/07/1999 | US5948475 Elemental metals or oxides distributed on a carbon substrate or self-supported and the manufacturing process using graphite oxide as template |
| 08/19/1999 | DE19805859A1 Aqueous alkali formulation used in dyeing cellulose textiles by impregnation and fixing |
| 08/04/1999 | EP0879115A4 Lapping and polishing method and apparatus for planarizing photoresist and metal microstructure layers |
| 07/28/1999 | CN1223963A Method for removing iron ions from soda lye |
| 06/03/1999 | WO1999027180A1 Method and device for removal of soda melt from a soda recovery unit |
| 06/02/1999 | CN1218008A Production of lithium and cobalt oxides |
| 05/19/1999 | EP0880467A4 Red mud processing |
| 04/27/1999 | CA2116017C Production of sodium hydroxide |
| 04/14/1999 | EP0802883B1 Method for coproducing calcium carbonate and sodium hydroxide |
| 03/30/1999 | US5888368 Process for manufacturing an aqueous sodium hydroxide solution |
| 03/11/1999 | WO1999011455A1 A thermal storage and transfer device |
| 03/10/1999 | EP0687323B1 Zero discharge mill distillation, salt recovery, and water management |
| 03/10/1999 | CN1210091A Magnetized solution and preparation thereof |
| 03/02/1999 | US5876687 Exposing the graphite oxide to a metal chloride at or below the thermal decomposition temperature of the graphite oxide for sufficient time to form an intermediary carbonaceous reaction product comprising elements of metal, oxygen, and |
| 01/20/1999 | EP0891298A1 Method for recovering sodium from alkaline industrial waste |
| 01/20/1999 | CN1205653A Process for purifying liquid contaminated by filamentary molecules |
| 12/09/1998 | EP0719359B1 Minimum adverse environmental impact pulp mill |
| 12/02/1998 | EP0880467A1 Red mud processing |
| 12/01/1998 | US5843316 Method of separating sodium hydroxide from white liquor or polysulfide liquor using diffusion dialysis |
| 11/25/1998 | EP0879115A1 Lapping and polishing method and apparatus for planarizing photoresist and metal microstructure layers |
| 11/11/1998 | EP0876196A1 Process for purifying a liquid contaminated by filamentary molecules |
| 11/11/1998 | CN1198406A Method for oxidation of at least one alkaline metal |
| 11/04/1998 | EP0875267A1 Process for crystallisation by vaporisation and condensation of the vapors |
| 09/24/1998 | WO1998041317A1 Injection port assembly |
| 09/16/1998 | EP0864534A1 Process for the purification of sodium hydroxide solution |
| 09/16/1998 | EP0864533A2 Method of purifying alkaline solution and method of etching semiconductor wafers |
| 07/22/1998 | EP0854115A1 Process for the oxidation of at least one alkali metal |
| 06/24/1998 | CN1185489A Electrochemical method for purification of hydroxide |
| 05/19/1998 | US5753097 Using electrochemical cell |
| 05/06/1998 | EP0839570A2 Process for manufacturing an aqueous solution of sodium hydroxide |
| 04/30/1998 | CA2217792A1 Process for manufacturing an aqueous sodium hydroxide solution |
| 04/08/1998 | EP0834346A2 Process for purifying hydroxide compounds |
| 04/03/1998 | CA2217625A1 Process for purifying hydroxide compounds |
| 03/11/1998 | EP0827776A1 Zinc plated steel container, use thereof in a process for the conditioning of caustic soda, and solid, conditioned caustic soda |
| 02/17/1998 | US5718618 Lapping and polishing method and apparatus for planarizing photoresist and metal microstructure layers |
| 01/21/1998 | EP0599917B1 Production of alkali metal hydroxide and regeneration of pulp liquors |
| 12/30/1997 | US5702570 Process of producing sodium hydroxide from sodium sulphate in a pulp mill |
| 11/05/1997 | CN1164221A Method for electrochemically removing metal impurities |
| 10/29/1997 | EP0802883A1 Method for coproducing calcium carbonate and sodium hydroxide |
| 10/14/1997 | US5678240 Sodium to sodium carbonate conversion process |
| 10/09/1997 | WO1997036823A1 Method for recovering sodium from alkaline industrial waste |
| 10/07/1997 | US5675055 Purification, demetallization by separating through aqueous acid and solvent extraction |
| 09/16/1997 | US5667757 Apparatus for safely reacting active metals |
| 09/10/1997 | EP0793620A1 Method for electrochemically removing metal impurities |
| 08/21/1997 | WO1997029992A1 Red mud processing |
| 08/14/1997 | WO1997028925A1 Lapping and polishing method and apparatus for planarizing photoresist and metal microstructure layers |
| 07/29/1997 | US5651875 Process for producing alkali metal hydroxide |
| 07/29/1997 | US5651796 Method for producing low bulk density hollow fine powder of alkali metal compound |
| 07/03/1997 | WO1997023279A1 Process for purifying a liquid contaminated by filamentary molecules |
| 07/03/1997 | CA2241193A1 Process for purifying a liquid contaminated by filamentary molecules |
| 05/28/1997 | CN1150578A Process for recovering alkali by red mud waste liquid film method |
| 05/21/1997 | CN1150120A Process for producing alkali and potassium sulfate from bittern containing sulfate |
| 05/14/1997 | CN1149551A Equipment system for diaphragm caustic soda evaporation technology |
| 04/23/1997 | EP0636051B1 Apparatus comprising a water ionizing electrode and process of use of said apparatus |
| 04/23/1997 | CN1148028A Process for prodn. of caustic soda using natural soda as raw material |
| 04/09/1997 | EP0767171A1 Process stream treatment |
| 03/12/1997 | EP0761599A2 Method of purifying alkaline solution and method of etching semiconductor wafers |
| 02/19/1997 | CN1143046A united producing method for sodium carbonate and sodium hydroxide |
| 11/21/1996 | DE19517945A1 Energy source producing hydrogen |
| 09/25/1996 | CN1032850C Method for preparing caustic soda with mirabilite |
| 09/24/1996 | CA2095670C Process for recovering carnallite and sylvite by electrostatic separation from carnallite-containing crude salts |