| Patents for C01D 1 - Oxides or hydroxides of sodium, potassium, or alkali metals in general (1,372) |
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| 01/05/1982 | CA1115490A1 Alkali regenerating process |
| 12/22/1981 | US4307034 Inert organic solvent dispersion of alkali hydroxide and reaction using the same |
| 10/20/1981 | CA1110828A1 Process for the purification of solutions containing carbonates, sulphates, possibly potassium or sodium hydroxide, and at least one of the metals vanadium, uranium, molybdenum |
| 09/15/1981 | US4289629 Removal of contaminants from strongly alkaline solution |
| 09/15/1981 | CA1109018A1 Method for concentrating aqueous caustic alkali solution |
| 09/09/1981 | EP0035128A1 Process for concentrating a low-percentage caustic soda solution |
| 08/04/1981 | CA1106348A1 Process for the regeneration of spent aqueous solutions of sodium, potassium and/or ammonium sulfides |
| 07/14/1981 | US4278527 Removing heavy metal complexes |
| 07/07/1981 | US4277331 Separation of suspended sodium chloride and sodium sulfate from aqueous sodium hydroxide |
| 06/30/1981 | US4276134 Method for removing chlorate from caustic solutions with electrolytic iron |
| 06/16/1981 | US4273657 Two-stage flotation purification of NaOH |
| 05/19/1981 | CA1101215A1 Metal oxide/azide gas generating compositions |
| 03/17/1981 | CA1097542A1 Bipolar membranes and method |
| 03/03/1981 | US4254089 Product recovery from alkali metal wastes |
| 03/03/1981 | CA1096590A1 Sodium oxide fume for sulfur oxide removal |
| 02/17/1981 | US4251490 Controlled temperature purification of aqueous sodium hydroxide solution |
| 02/10/1981 | US4250032 Filtration, fluidizing with sea water, neutralizing soda |
| 12/23/1980 | US4240885 Oxidation of organics in aqueous salt solutions |
| 12/09/1980 | US4238305 Electrodialytic process for the conversion of impure soda values to sodium hydroxide and carbon dioxide |
| 11/25/1980 | US4235717 Process for desalting an aqueous caustic solution |
| 10/07/1980 | USRE30411 Process for purifying sodium hydroxide |
| 09/23/1980 | US4224289 Alkali regeneration process |
| 08/19/1980 | CA1083782A1 Process for reducing chlorate content of aqueous alkali metal hydroxide solution which contains chlorate |
| 05/06/1980 | CA1076777A1 Process for purifying sodium hydroxide |
| 04/29/1980 | US4200617 Product recovery from alkali metal wastes |
| 02/19/1980 | US4189362 Method of purifying aqueous solutions of alkali metal hydroxides |
| 11/27/1979 | US4176163 Sodium oxide fume for sulfur oxide removal |
| 11/27/1979 | CA1067096A1 Process for upgrading caustics spent by naphthenic acids |
| 11/15/1979 | WO1979000931A1 Preparation of white liquor |
| 09/25/1979 | US4169131 Process for recovering caustic alkali from spent alkali liquor |
| 09/25/1979 | CA1062880A1 Process for the disposal of alkali metals |
| 09/04/1979 | CA1061794A1 Method for the solubilizing of alkali metal salts with polyethyleneglycoldiethers and the utilization thereof |
| 07/31/1979 | US4163043 Treatment with ammonia and alkali metal hydroxide to form sulfides and carbonates, reaction with copper oxide to form copper sulfide, roasting |
| 07/24/1979 | US4162187 Process for production of sodium thiosulfate and sodium hydroxide |
| 07/24/1979 | CA1059063A1 Process for the production of sodium hydroxyde from a sulfate containing sodium chloride and hyroxyde solution from electrolytic cells_________ |
| 07/10/1979 | CA1058068A1 Multi-steam chest series flow evaporator |
| 07/03/1979 | US4159922 Accelerated process for causticization of Kraft green liquor |
| 05/22/1979 | CA1054921A1 Concentration process by multistage, multiple effect evaporator |
| 05/15/1979 | US4154801 Process for purifying alkali metal hydroxide or carbonate solutions |
| 04/18/1979 | EP0001537A1 Process for the treatment of solutions containing carbonate, sulfate, possibly hydroxide of sodium or potassium and at least one of the metals vanadium, uranium, molybdenum |
| 04/17/1979 | US4150205 Composite ion exchange resins having low residual amounts of quaternary ammonium cation |
| 03/20/1979 | US4145265 Process for concentration of caustic alkali solution produced by ion exchange membrane type electrolysis |
| 03/20/1979 | CA1050874A1 Forced circulation cooling crystallizer |
| 01/10/1979 | EP0000119A1 Process for preparing anhydrous caustic alkali melts |
| 01/02/1979 | US4132588 Concentration process by multistage, multiple effect evaporator |
| 10/17/1978 | US4120746 Heat exchanger, forced circulation |
| 09/26/1978 | US4116889 Bipolar membranes and method of making same |
| 09/26/1978 | CA1039029A1 process for preparing powdered caustic soda (naoh) |
| 09/12/1978 | US4113649 Method for the solubilizing of alkali metal salts with polyethyleneglycoldiethers and the utilization thereof |
| 08/29/1978 | US4110181 Method of handling aqueous solutions of alkali metal hydroxides that are concentrated in respect of alkali metal halides |
| 05/23/1978 | US4090932 Method for concentrating aqueous caustic alkali solution |
| 05/02/1978 | US4087253 Method of obtaining caustic soda from a sodium chloride liquor containing sulphate ions recovered from an electrolytic cell |
| 04/18/1978 | US4085191 Process for recovery of potassium from manganate plant wastes |
| 03/07/1978 | US4077856 Removal of mercury from liquids |
| 02/21/1978 | US4075068 Process for the recovery of aluminum from alunite |
| 12/27/1977 | US4065270 Adsorbed onto bubbles |
| 12/20/1977 | US4064065 Sodium and potassium hydroxide, freezing points |
| 09/13/1977 | US4048285 Process for the extraction of alumina from minerals, rocks and industrial by-products |
| 06/28/1977 | US4032615 Method for the safe disposal of alkali metal |
| 06/28/1977 | US4032614 Process for the disposal of alkali metals |
| 05/17/1977 | US4024229 Production of polysulfide with PTFE coated catalyst |
| 01/25/1977 | US4005061 Method for recovering potassium hydroxide and zinc oxide from potassium zincate solutions |
| 12/28/1976 | US4000264 Method of recovering sodium hydroxide from sulfur free pulping or bleaching waste liquor by mixing ferric oxide with condensed waste liquor prior to burning |
| 12/14/1976 | US3997389 Concentrating sodium or potassium hydroxide |
| 12/07/1976 | US3996079 Azide gas generating compositionsinflatable bags for automobiles |
| 09/28/1976 | US3983215 Process for preparing NaOH.3.5 H2 O crystals |
| 08/24/1976 | US3976430 Forced circulation cooling crystallizer |
| 07/06/1976 | US3968197 Process for treating sodium silico fluoride |
| 06/15/1976 | US3963424 Cooling aqueous alkali metal hydroxide liquors by vacuum evaporation with subsequent solids precipitate removal |
| 05/04/1976 | US3954945 Water vapor, oxidation, hydrolysis of metal halides to oxides |
| 02/10/1976 | US3937646 Ferritic stainless steel |
| 01/27/1976 | US3935096 Production of aqueous metal hydroxide solutions of low metal halide concentration |