| Patents for C01D 7 - Carbonates of sodium, potassium, or alkali metals in general (1,753) |
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| 10/01/1991 | US5053144 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry |
| 09/04/1991 | CN1054234A Process for preparation of carbonates of alkali metals |
| 08/27/1991 | US5043149 Slurrying tailing with sodium (bi)carbonate; settling; removing liquids |
| 08/13/1991 | CA1287477C Process for the manufacture of iodine |
| 08/08/1991 | CA2009616A1 Method of producing carbonic acid salts of alkali metals |
| 08/07/1991 | EP0439636A1 Alkali metal (hydrogen) carbonate production process |
| 06/19/1991 | CN1012892B Process for separating alkali metal bicarbonate grains from a nitrogenous organic base hydrochloride liquid film absorbed on their surface |
| 06/12/1991 | CN1052097A Liquid-phase circulating substitution process for preparing alkali from mirabilite |
| 05/02/1991 | EP0424667A2 A salt restored from discoloration and a method for this restoration |
| 01/07/1991 | CA2020589A1 Stabilized sodium percarbonate composition |
| 12/19/1990 | CN1047839A Sodium bicarbonate and process for crystallization of sodium bicarbonate |
| 12/12/1990 | CN1010771B Preparation of soda using waste saponification liquor |
| 11/28/1990 | CN1047268A Process for preparing soda ash from bittern |
| 11/21/1990 | CN1047046A Process for removing coatings from sensitive substrates, and blasting media useful therein |
| 11/15/1990 | WO1990011163A3 Process for removing coatings from sensitive substrates, and blasting media useful therein |
| 11/07/1990 | CN1010306B Process for producing water-insoluble nitrogenous organic base |
| 11/07/1990 | CN1010305B Process for preparing organic base from aqueous solution of alkali metal bicarbonate and hydrochloride organic base containing nitrogenous |
| 10/31/1990 | EP0395134A1 Sodium bicarbonate and process for crystallizing sodium bicarbonate |
| 10/17/1990 | CN1046143A Production method of industrial sodium bicarbonate and agricultural ammonium chloride |
| 10/17/1990 | CN1046142A Solid phase production method of soda by using material contained sodium sulfate and ammonium bicarbonate as raw mateials |
| 09/15/1990 | WO1990011163A2 Process for removing coatings from sensitive substrates, and blasting media useful therein |
| 09/15/1990 | CA2050321A1 Process for removing coatings from sensitive substrates, and blasting media useful therein |
| 08/29/1990 | CN1044931A Continuous prodn of soda from mirabilite by means of one-step method |
| 08/08/1990 | CN1009076B Process for mfg. dense anhydrous sodium carbonate |
| 07/18/1990 | EP0378172A1 Surface-treated sodium bicarbonate particle and molded preparation thereof |
| 07/18/1990 | CN1008808B Method for self-return of soda and its apparatus |
| 07/09/1990 | CA2005850A1 Surface-treated sodium bicarbonate particle and molded preparation thereof |
| 06/13/1990 | CN1008365B Process for regenerating an organic solution of a water-insoluble nitrogenous organic base |
| 05/30/1990 | CN1042524A Process for prepg. basic metal carbonates |
| 05/23/1990 | EP0368919A1 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry |
| 05/03/1990 | DE3837249A1 Process for reprocessing slags from metallurgical processes with recovery of soda |
| 04/24/1990 | US4919910 Reacting dry potassium carbonate, carbon dioxide gas and water vapor at atmospheric pressure under turbulent mixing; dry product |
| 03/28/1990 | CN1040772A Manufacturing method of sodium carbonate by use of saponified waste liquor |
| 03/08/1990 | WO1990002097A1 Compacts of spray dried water soluble compounds |
| 03/01/1990 | DE3829093A1 Sterile, crystalline sodium carbonate and a process for the preparation thereof |
| 02/21/1990 | CN1039782A Method of metathetical soda ash combined producting ammonium chloride |
| 11/29/1989 | EP0343673A1 Method of production of extra light soda |
| 11/16/1989 | DE3815685A1 Process for the continuous reaction of sodium sulphate to give sodium hydrogen carbonate and gypsum by means of flue gas and lime |
| 11/01/1989 | CN1005627B Mfr. of sodium carbonate from dry-exploited ore |
| 09/26/1989 | US4869882 Low temperature crystallization |
| 09/06/1989 | CN1035272A Method of producting active sodium carbonate |
| 08/15/1989 | US4857295 Process for the manufacture of iodine |
| 08/03/1989 | DE3816061C1 Process for preparing potassium carbonate |
| 07/25/1989 | CA1257764A1 Method for the preparation of a bicarbonate sorbent in flue gas desulfurization |
| 07/05/1989 | CN2040624U Soda steam calciner |
| 06/29/1989 | WO1989005777A1 Process for preparing an aqueous solution containing potassium bicarbonate and potassium carbonate suitable for washing acid gases |
| 05/30/1989 | CA1254715A1 Process for producing anhydrous sodium carbonate |
| 04/20/1989 | WO1989003364A1 Method of reforming soluble salts to effect purification and increase crystal size thereof |
| 03/21/1989 | US4814151 Soda ash manufacture |
| 03/08/1989 | CN1003506B Mfr. of sodium carbonate by solvent extraction |
| 03/02/1989 | DE3723294C1 Process for recovering soda from slags of the soda-desulphurisation of pig iron |
| 02/09/1989 | WO1989000980A1 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry |
| 01/17/1989 | CA1248732A1 Production of sodium bicarbonate by reversion of nahco.sub.3-containing double salt |
| 11/16/1988 | CN87217100U Crystallizer for producing heavy soda ash and sodium carbonate monohydrate |
| 11/10/1988 | DE3814274A1 Process for preparing active sodium carbonate |
| 08/03/1988 | CN87104642A Producing soda by solid-phase process |
| 07/20/1988 | CN86107909A Salt and pure soda combine production method |
| 07/07/1988 | DE3644340A1 Process and plant for recovering soda from green liquor |
| 07/06/1988 | CN87108249A Whitening agent for sodium carbonate |
| 05/18/1988 | CN87107805A Process for extraction of organic liquid containing nitrogenous organic base,from aqueous slurry of particles of inorganic material and process for production of alkali metal bicarbonate |
| 05/18/1988 | CN87107296A Process for separating alkali metal bicarbonate grains from a nitrogenous organic base hydrochloride liquid film adsorbed on their surface and process for the production of alkali metal bicarbonate |
| 05/11/1988 | EP0266831A1 Process to separate particles of alkali-metal-bicarbonate from a liquid layer of hydrochloride of an organic nitrogen-containing base adsorbed on their surface, and process for the production of alkali-metal-bicarbonate |
| 05/11/1988 | EP0266830A1 Process for the extraction of an organic liquid containing an organic nitrogen-containing base from a water suspension of mineral particles, and process for the production of alkali metal bicarbonate |
| 05/10/1988 | US4743439 Wet calcination of alkali metal bicarbonates in hydrophobic media |
| 04/19/1988 | US4738836 Preparation of high bulk density anhydrous sodium carbonate crystals |
| 04/13/1988 | EP0263559A1 Process for working-up soda slags in the desulfurization of pig iron |
| 03/30/1988 | CN86106693A Method for self-return of soda and its apparatus |
| 02/17/1988 | CN86104762A Mfr. of sodium carbonate from dry-exploited ore |
| 02/17/1988 | CN86104760A Mfr. of sodium carbonate by solvent extraction |
| 01/07/1988 | EP0251426A2 Selective removal of nitrate ions from salt solutions |
| 12/30/1987 | CN87103005A Carbonization tower cooled exterually by natural circulation |
| 09/09/1987 | CN86101220A Purification of solution of potassium carbonate |
| 08/12/1987 | CN86108737A Process for preparation of aqueous solution of sodium chloride and process for the production of sodium bicarbonate |
| 08/12/1987 | CN86104240A Technology of purifying the sodium carbonate from natural soda-salt mineral |
| 08/05/1987 | EP0230686A1 Process for preparing an aqueous solution of sodium chloride, and process for producing sodium bicarbonate |
| 07/08/1987 | EP0227978A2 Separation of ammonia from a sodium solution by means of distillation |
| 06/30/1987 | US4677229 Process for the production of a water-insoluble nitrogenous organic base, starting from an aqueous solution of an alkali metal bicarbonate and the hydrochloride of the said base and process for the manufacture of sodium bicarbonate |
| 06/24/1987 | CN86101430A Method of drawing out cyanogen ion from engine ashes containing potassium |
| 06/16/1987 | CA1222970A1 Membrane process for converting sodium sulfate into sulfuric acid and sodium carbonate |
| 06/10/1987 | CN85108727A Process for preparation of dense soda ash |
| 05/12/1987 | US4664893 Method for the preparation of a bicarbonate sorbent in flue gas desulfurization |
| 05/06/1987 | EP0220340A1 Process for the preparation of dense soda ash |
| 04/28/1987 | CA1220926A1 Wet calcination of alkali metal bicarbonates in hydrophobic media |
| 04/22/1987 | EP0218998A1 Process for the manufacture of iodine |
| 03/31/1987 | US4654204 Production of sodium bicarbonate by reversion of soda-type feed salt |
| 03/24/1987 | US4652437 Process for producing anhydrous sodium carbonate |
| 03/11/1987 | CN86201093U Equipment for boiling heavy alcaly-calcining directly using hot air |
| 03/11/1987 | CN85106099A Process for the production of a water-insoluble nitrogenous organic base |
| 02/25/1987 | CN85105969A Process for the production of a organic base and sodium bicarbonate from an aqueous solution of an alkali metal bicarbonate and organic base containing nitrogenous |
| 02/10/1987 | CA1217783A Process and installation for the production of an organic solution from an organic base non water soluble |
| 01/13/1987 | US4636289 Multicompartment, direct current |
| 12/17/1986 | CN85104852A Process for regenerating an organic solution of a water-insoluble nitrogenous organic base |
| 10/09/1986 | WO1986005714A1 Method for the preparation of a bicarbonate sorbent in flue gas desulfurization |
| 09/02/1986 | CA1210562A1 Process for the combined preparation of chlorinated hydrocarbons and a carbonate of an alkali metal |
| 08/20/1986 | EP0191512A1 Process for the manufacture of dense anhydrous sodium carbonate, and dense anhydrous sodium carbonate obtained by this process |
| 08/12/1986 | US4605771 Decomposition of water immiscible amine chloride by a basic reagent |
| 07/30/1986 | CN86100688A Process for manufacturing dense anhydrous sodium carbonate and dense anhydrous sodium carbonate obtained by this process |
| 07/30/1986 | CN85102466A Combination process for continuous production of sodium carbonate and ammonium chloride |
| 07/09/1986 | CN85105345A Two stage propagation-type carbonation combined soda process |
| 04/22/1986 | US4584077 Process for recovering sodium carbonate from trona and other mixtures of sodium carbonate and sodium bicarbonate |