| Patents for C01D 1 - Oxides or hydroxides of sodium, potassium, or alkali metals in general (1,372) |
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| 09/03/1996 | US5552099 Process for pelletising particles of alkali metal ferrite |
| 08/28/1996 | EP0728864A2 Zero discharge pulp mill cascading water management |
| 08/27/1996 | US5549788 Minimal effluents discharge pulp mill with chemical recovery |
| 08/13/1996 | US5545385 Combusting liquor in fluidized bed furnace to produce alkalimetal ferrite particles, mixing cooled particles with aqueous solution of alkali metal hydroxide |
| 07/31/1996 | CN1127676A Method for producing low bulk density hollow fine powder of alkali metal compound |
| 07/18/1996 | WO1996021620A1 Method for coproducing calcium carbonate and sodium hydroxide |
| 07/17/1996 | EP0616602A4 Process for producing a carbonate composition. |
| 07/11/1996 | WO1996020890A1 Method of making hypophosphorous acid |
| 07/11/1996 | WO1996008445A3 Process for treating an aqueous KF waste stream and for converting KF into HF and KOH |
| 07/03/1996 | EP0719359A1 Minimum adverse environmental impact pulp mill |
| 07/02/1996 | US5531906 Magnesium alumium hydrotalcite precipitation |
| 05/30/1996 | WO1996015984A1 Method for electrochemically removing metal impurities |
| 05/30/1996 | CA2205073A1 Method for electrochemically removing metal impurities |
| 05/21/1996 | US5518583 Minimizing effluents from a cellulose pulp mill |
| 04/16/1996 | US5508018 Process for the regeneration of sodium hydroxide from sodium sulfide |
| 04/09/1996 | US5505930 Purging container of oxygen with dry inert gas, introducing water containing carrier gas so that water condenses onto reactive metal to form hydroxide and hydrogen |
| 04/09/1996 | US5505924 Multistage countercurrent recrystallization process and apparatus for performing same |
| 03/21/1996 | WO1996008445A2 Process for treating an aqueous kf waste stream and for converting kf into hf and koh |
| 03/21/1996 | CA2199723A1 Process for treating an aqueous kf waste stream and for converting kf into hf and koh |
| 03/13/1996 | CN1118334A Continuous alternating process for alkali fixation and its apparatus |
| 03/13/1996 | CN1118333A Process for extracting soluble non-sulfur potassium salt from feldspar |
| 02/14/1996 | EP0696551A1 Method of producing low bulk density hollow fine powder of alkali metal compound |
| 02/14/1996 | EP0656154B1 Process for disposing of sodium-sulphur accumulator cells |
| 02/04/1996 | CA2155365A1 Method for producing low bulk density hollow fine powder of alkali metal compound |
| 12/27/1995 | CN1113884A Producing method for caustic soda |
| 12/20/1995 | EP0687323A1 Zero discharge mill distillation, salt recovery, and water management |
| 11/15/1995 | CN1030250C Technology of preparing caustic soda by method of ion exchange causticizing |
| 10/25/1995 | EP0446296B1 Method for purification of bases from materials comprising base and salt |
| 10/19/1995 | WO1995027681A1 Process and system for purifying a contaminated caustic feed solution |
| 09/06/1995 | CN1107805A Double compounding method for preparing potassium sulfate |
| 07/26/1995 | EP0663890A1 A process for recovering alkali metal hydroxide from organic liquors |
| 07/19/1995 | EP0662860A1 A process for pelletising particles of alkali metal ferrite |
| 07/11/1995 | US5431792 Method of making hypophosphorous acid |
| 07/06/1995 | DE4400003A1 Prodn. of heat energy using closed circuit reaction driven by solar power |
| 06/28/1995 | EP0659467A1 Process for the production of alkali metal hydroxules |
| 06/20/1995 | CA1335930C Method for preventing metal corrosion in caustic handling systems |
| 06/07/1995 | EP0656154A1 Process for disposing of sodium-sulphur accumulator cells. |
| 06/07/1995 | CN1103383A Process for treatment of sodium hydroxide waste liquor containing aluminum |
| 05/19/1995 | EP0663890A4 A process for recovering alkali metal hydroxide from organic liquors. |
| 05/19/1995 | EP0662860A4 A process for pelletising particles of alkali metal ferrite. |
| 05/16/1995 | US5415759 Bipolar |
| 05/10/1995 | EP0652041A2 Method for producing high purity hydroxides and alkoxides |
| 04/26/1995 | EP0649939A1 Method of producing sodium hydroxide from white liquor |
| 04/05/1995 | CN1101089A A process for pelletising particles of alkali metal ferrite |
| 03/09/1995 | WO1995006775A1 Minimum adverse environmental impact pulp mill |
| 03/09/1995 | CA2170594A1 Minimum adverse environmental impact pulp mill |
| 03/07/1995 | US5395497 Process for the manufacture of an aqueous solution of sodium hydroxide |
| 02/21/1995 | US5391267 Electrolysis |
| 02/14/1995 | US5389211 Method for producing high purity hydroxides and alkoxides |
| 02/01/1995 | EP0636577A1 Process for treatment of sodium hydroxide waste liquor containing aluminium |
| 01/18/1995 | EP0618838A4 Electrodialytic recovery process. |
| 01/10/1995 | US5380413 Process for the manufacture of a bipolar membrane and process for the manufacture of an aqueous alkali metal hydroxide solution |
| 12/14/1994 | EP0628594A2 Process of manufacturing of a bipolar membrane and process for producing an aqueous solution of alkali metal hydroxide |
| 10/12/1994 | EP0618838A1 Electrodialytic recovery process |
| 09/28/1994 | EP0616602A1 Process for producing a carbonate composition |
| 09/15/1994 | WO1994020675A1 Zero discharge mill distillation, salt recovery, and water management |
| 09/15/1994 | CA2155439A1 Zero discharge mill distillation, salt recovery, and water management |
| 09/07/1994 | EP0447448B1 Method for purification of acids from materials comprising acid and salt |
| 08/18/1994 | WO1994018117A1 Process for the production of hydrogen |
| 08/03/1994 | CN1090357A A process for pelletising particles of alkali metal ferrite |
| 08/03/1994 | CN1090256A A process for recovering alkali metal hydroxide from organic liquors |
| 06/08/1994 | EP0599917A1 Production of alkali metal hydroxide and regeneration of pulp liquors |
| 05/11/1994 | CN1086578A Production of potassium from brine out of earth surface or underground through artificial vaporing pump |
| 05/03/1994 | US5308455 Electrodialysis; flowing sodium carbonate and withdrawing sodium bicarbonate; decomposition, circulation |
| 04/14/1994 | WO1994007797A1 A process for recovering alkali metal hydroxide from organic liquors |
| 04/14/1994 | WO1994007595A1 A process for pelletising particles of alkali metal ferrite |
| 04/14/1994 | CA2146031A1 A process for pelletising particles of alkani metal ferrite |
| 04/14/1994 | CA2145853A1 A process for recovering alkali metal hydroxide from organic liquors |
| 04/13/1994 | CN1085186A Method for preparing caustic soda with mirabilite |
| 04/12/1994 | US5302246 Method of managing liquid steams in a pulp mill |
| 03/30/1994 | EP0589501A2 Process for the production of alkali metal hydroxides and elemental sulfur from sulfur-containing alkali-metal salts |
| 03/30/1994 | CN1084584A Process for the manufacture of an alkali metal chlorate and device for the implementation thereof |
| 03/30/1994 | CN1024095C Manufacturing process of caustic, soda by use of ionization-causticizing method of trona and its equipment |
| 03/30/1994 | CN1024094C Technological routine for converting mirabilite into caustic soda |
| 03/15/1994 | US5294316 Regenerated cellulose process |
| 03/03/1994 | WO1994005054A1 Process for disposing of sodium-sulphur accumulator cells |
| 03/03/1994 | CA2141575A1 Process for disposing of sodium-sulphur accumulator cells |
| 02/26/1994 | CA2104746A1 Process for the production of alkali metal hydroxides and elemental sulfur from sulfur-containing alkali metal salts |
| 02/15/1994 | US5286473 Reacting alkali metal with hydrochloric acid or water, heating formed chloride with aluminum to produce aluminum chloride and reusable alkali metal |
| 02/01/1994 | US5282935 Electrodialytic process for producing an alkali solution |
| 01/25/1994 | US5281318 Process for processing a waste etching solution containing a fluorine component and an ammonia component to recover valuables therefrom |
| 01/05/1994 | EP0577207A1 Process for the manufacture of an aqueous solution of sodium hydroxide |
| 01/05/1994 | DE4214950C1 Increasing yield in electrostatic sepn. of hard salt contg. carnallite - by recycling residue from potash purificn. stage to potash sepn. from kieserite |
| 01/04/1994 | CA2098344A1 Process for the production of an aqueous sodium hydroxide solution |
| 11/24/1993 | EP0571273A1 Process for the production of alkali metal chlorate and apparatus therefor |
| 11/21/1993 | CA2096588A1 Process for the production of alkali metal chlorate and device therefor |
| 11/02/1993 | US5258168 Heating a sulfate or bisulfate of sodium, potassium, or ammonium with an aqueous solution of aluminum hydroxide particles under acidic conditions to react and recovering formed alunite |
| 10/28/1993 | WO1993020929A1 Water ionizing electrode and process for using |
| 10/28/1993 | CA2117898A1 Water ionizing electrode and process for using |
| 10/27/1993 | CN1022557C Improved preparation process of sodium hydroxide with causticization |
| 09/16/1993 | WO1993017959A1 Production of transparent cationically homogeneous refractory oxides of nanometer-scale particle size diameters at reduced temperatures |
| 09/15/1993 | EP0560422A1 Process for the production of sodium hydroxide |
| 09/15/1993 | EP0560316A2 Method for producing alkaline metal hydroxide |
| 09/10/1993 | CA2090828A1 Process for producing sodium hydroxide |
| 08/31/1993 | US5240467 Purification of inorganic salts, such as cesium iodide or chloride |
| 07/28/1993 | EP0552170A1 Alkali metal hydroxide generation system and the method therefor |
| 07/22/1993 | DE4201033A1 Aerosol sepn. from gas esp. hydrogen@ or oxygen@ stream from water electrolysis - in which supply pipe is surrounded by tube which forms bubble column space and separates space from scrubbing liq. outlet region |
| 07/07/1993 | CN1073926A Manufacture method of concentrated alkali |
| 06/24/1993 | WO1993012038A1 Process for producing a carbonate composition |
| 06/24/1993 | WO1993011860A1 Electrodialytic recovery process |