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| Number | Title | Issue Date |
| 7361318 | Sodium hydrogencarbonate crystal particles A method for producing sodium hydrogencarbonate crystal particles having a low caking property, which comprises lowering the potassium concentration in sodium hydrogencarbonate crystal particles having a mean particle diameter of from 50 to 500 μm to a level of at ... | 04/22/2008 |
| 7144561 | Method for the preparation of iron hydroxide, iron oxide hydrate or iron oxide from filter salts of dilute acid recovery Described is a method for the manufacture of iron hydroxide, iron oxide hydrate or iron oxide from filter salts from thin acid recovery, in which the filter salts are dissolved in water, the solution is adjusted to a pH of | 12/05/2006 |
| 7122249 | Abrasion-resistant agglomerate mineral substance granule, powder comprising such granules and production method therefor Granule comprising an agglomerate of particles of a mineral substance. The agglomerate is coated with a monolithic outer layer, which provides it with improved abrasion resistance. Powder comprising granules according to the invention. Process for manu... | 10/17/2006 |
| 7041267 | Granular sodium carbonate obtained by fluid-bed spray granulation and a process for its production The invention relates to a process for the production, by fluid-bed spray granulation, of granular sodium percarbonate having a low TAM value. According to the invention, in the fluid-bed spray granulation, an Mg compound in a quantity of 50 to 2,000 ppm, in particu... | 05/09/2006 |
| 5348689 | Molten salt destruction of alkali and alkaline earth metals A process for destroying alkali metal and alkaline earth metal-containing wastes, such as sodium, by feeding such waste into a molten bath containing a molten salt such as sodium carbonate, or a mixture of salts having a lower melting point, such as a mix... | 09/20/1994 |
| 5288472 | Process for the recovery of the sodium hydroxide and sodium chloride from the effluent of a diaphragm cell as solid sodium bicarbonate The present invention relates to a method and process for recovering solid sodium bicarbonate, from the effluent, of the cathode compartment of a diaphragm cell that contains sodium hydroxide and sodium chloride. The effluent is treated with carbon dioxid... | 02/22/1994 |
| 5275794 | Process for producing sodium bicarbonate from natural soda salts Production of sodium bicarbonate from natural soda deposits that may occur as natural brines or solid soda salts is disclosed. The alkalinity in these natural soda deposits consists of carbonates and bicarbonates. The carbonates are converted to bicarbona... | 01/04/1994 |
| 5202062 | Disposal method of radioactive wastes The present invention adds carbonates or chlorides of alkaline earth metals to the radioactive wastes containing sodium sulfate and subjects sulfate group in the radioactive wastes to reduction treatment, thereby converts the sulfate group into sulfides o... | 04/13/1993 |
| 5093089 | Process for the separation of sulphate Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound. The sulphate may be separated substantially free of chromium component by adjustment of the pH to the ran... | 03/03/1992 |
| 4677229 | 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 Process for the production of a water-insoluble nitrogeneous organic base, from an aqueous solution of alkali metal bicarbonate and the base hydrochloride, according to which the solution (11) is treated with a complement of the base hydrochloride (12), a... | 06/30/1987 |
| 4563340 | Process for the secondary obtention of sodium carbonate from FLP waste liquor This invention is related to a process for the secondary obtention of sodium carbonate from a waste liquor (known as FLP waste liquor) containing principally sodium chloride, ammonium bicarbonate, ammonium chloride and carbon dioxide, which is obtained in... | 01/07/1986 |
| 4402850 | Method of producing a liquid agent for improving the quality of contaminated water A method is disclosed of producing a liquid agent for improving the quality of contaminated water, particularly water in pools, natural bodies of water and waste waters, characterized by introducing with agitation comminuted rock-salt clay or a mixture th... | 09/06/1983 |
| 4291002 | Process for producing sodium carbonate from complex brines A process for the production of sodium carbonate wherein sodium bicarbonate is recovered from a brine containing sodium carbonate by carbonation of the brine under controlled conditions. The sodium bicarbonate is crystallized from the carbonated brine in ... | 09/22/1981 |
| 4288419 | Enhanced recovery of sodium carbonate from NaCl-containing sodium carbonate solutions A method for enhancing recovery of sodium carbonate from sodium carbonate solutions which contain sodium chloride. Anhydrous sodium carbonate is recovered in good yields from aqueous sodium carbonate solutions containing sodium chloride by evaporative cry... | 09/08/1981 |
| 4268408 | Solid cyanuric chloride handling improvements with tricalcium phosphate A non-lumping, non-dusting free-flowing cyanuric chloride is provided by adding thereto 0.1 to 5% of finely divided tribasic calcium phosphate. The composition reduces the fumes and dust associated with handling of cyanuric chloride and is compatible with... | 05/19/1981 |
| 4256719 | Process for the combined manufacture of chlorinated hydrocarbons and sodium bicarbonate Production of sodium bicarbonate by the Solvay-soda method, employing a volatile aliphatic amine instead of ammonia, is combined with the oxychlorination of olefins in liquid phase by using the amine hydrochloride side-product of the soda plant as chlorin... | 03/17/1981 |
| 4190638 | Production of hypochlorous acid An aqueous hypochlorous acid production process is disclosed wherein the precipitate formed upon carbonating electrolytic cathode cell liquor is contacted in a fluidized bed with a mixture of gaseous chlorine and water vapor and the exit gas from the flui... | 02/26/1980 |
| 4061718 | Method for the recovery of ammonia from liquor from the filters of ammonia-soda plants A method for the recovery of ammonia from liquor from the filters of ammonia-soda plants, which contains free ammonia and ammonium chloride. In this method the liquor is heated to release the free ammonia, and the remaining liquor is then treated successi... | 12/06/1977 |
| 4032616 | Process for the production of sodium bicarbonate from diaphram cell liquors Process and apparatus for producing bicarbonates by converting sodium hydroxide to sodium carbonate and reacting the sodium carbonate with carbon dioxide in a gas-liquid exchange and solid discharge zone and then in a gas-liquid exchange and solid dischar... | 06/28/1977 |
| 4007082 | Kraft mill recovery system An improved process for the treatment of precipitator catch wherein the catch is slurried with water, sufficient carbon dioxide is added to convert the sodium carbonate present to sodium bicarbonate, and sodium chloride is separated from the sodium sulfat... | 02/08/1977 |
| 3996097 | Kraft mill recovery system An improved process for the treatment of precipitator catch wherein the catch is slurried with water, sufficient carbon dioxide is added to convert the sodium carbonate present to sodium bicarbonate, and sodium chloride is separated from the sodium sulfat... | 12/07/1976 |
