| Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848) |
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| 12/30/2009 | CN100575354C Method for producing rongalite with low zinc |
| 12/23/2009 | EP1807349B1 Method for crystallizing soluble salts of divalent anions from brine |
| 12/09/2009 | CN101597222A Method for producing rongalite |
| 12/09/2009 | CN101597037A Method for bioleaching phosphor in iron ore containing phosphor |
| 11/25/2009 | CN101585548A Method for preparing inorganic sylvine crystal and feed additive by using molasses fermented waste liquid |
| 11/24/2009 | CA2552104C Process for recovery of sulphate of potash |
| 10/28/2009 | CN101565191A Method for preparing anhydrous sodium sulfite by circularly absorbing sulfur dioxide in exhaust gas |
| 10/21/2009 | CN101563292A Method for the production of sodium sulphate and magnesium hydroxide |
| 10/21/2009 | CN101559961A Process for producing potassium sulfate and polymeric aluminum ferric sulfate by low-temperature decomposing of potassium feldspar by hydrofluosilicic acid |
| 10/21/2009 | CN101559960A Method for removing excessive hydrofluosilicic acid in process of producing potassium sulfate by low-temperature decomposing of potassium feldspar by hydrofluosilicic acid |
| 10/21/2009 | CN101559959A Process for producing potassium sulfate and ammonia sulfate by wet decomposing potassium feldspar |
| 10/21/2009 | CN101559929A Stable preparation method of sodium peroxydisulfate |
| 10/20/2009 | US7604792 Separation of purified potassium sulfate from glaserite |
| 09/30/2009 | CN101544384A Method for reclaiming the accessory product acidic mirabilite when producing chlorine dioxide |
| 09/30/2009 | CN100545091C High purity big granule industrial anhydrous sodium sulphate production method |
| 09/30/2009 | CN100545085C Technology for producing white carbon black, sodium sulfite, sodium bisulfite by sodium sulfate method |
| 09/23/2009 | CN101538057A Method for separating magnesium from lithium and extracting lithium from brine |
| 09/23/2009 | CN100542957C Granulation method of anhydrous sodium sulfate |
| 09/09/2009 | CN101525189A Method for treating wastewater containing ammonia, vanadium, chrome and sodium sulfate |
| 08/26/2009 | CN100532259C Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method |
| 08/19/2009 | CN201292256Y Discharge machine sealing apparatus |
| 08/19/2009 | CN201292255Y Stuff pulling cooling unit |
| 08/13/2009 | US20090199461 Aqueous borohydride compositions |
| 07/22/2009 | CN201276426Y Sodium sulphate decahydrate crystallizer |
| 07/22/2009 | CN101486475A Method for coproduction of potassium sulfate and superfine light calcium carbonate from fluorogypsum |
| 07/15/2009 | CN100513312C Method of extracting industrial anhydrous sodium sulfate from waste water in silicone dioxide production using precipitation method |
| 06/25/2009 | WO2009078690A1 Method for the production of sodium sulphate and magnesium hydroxide |
| 06/25/2009 | DE102007058666A1 Producing langbeinite and potassium sulfate from solution, comprises vaporizing solution, crystallizing and separating langbeinite, cooling solution, crystallizing and separating potassium sulfate and using solution for leaching polyhalite |
| 06/24/2009 | CN100503440C Process of preparing potassium sulfate with potassium containing bittern of magnesium sulfate subtype |
| 06/18/2009 | WO2009013728A8 Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates |
| 06/17/2009 | CN201258263Y Energy-saving type potassium hydrogen sulfate conversion trough |
| 06/11/2009 | WO2009070843A1 Bisulphite treatment of rna |
| 06/11/2009 | CA2707165A1 Bisulphite treatment of rna |
| 05/26/2009 | CA2538493C Improved process for the recovery of sulphate of potash (sop) from sulphate rich bittern |
| 05/22/2009 | WO2009062984A1 Method of decarbonation and its use in producing crystalline sodium sulfite or other alkali products |
| 05/20/2009 | CN101434442A Comprehensive utilization method for industrial waste acid containing cupric ion and special equipment therefor |
| 05/20/2009 | CN101434402A Method of producing potassium sulfate by reaction, extraction and crystallization one-step method |
| 05/20/2009 | CN100488890C Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor |
| 05/20/2009 | CN100488874C Method for preparing potassium sulphate from potassium mixed salt |
| 05/13/2009 | CN101428915A Method for zero discharge processing of waste saponification lye of cyclohexanone produced by cyclohexane oxidation technology |
| 05/13/2009 | CN101428832A Potassium sulfate extracted from sintering dust separation ash and method for producing the same |
| 05/13/2009 | CN101428831A Reaction crystalizer for producing potassium sulfate with ammonia process of desulfurization |
| 05/13/2009 | CN101428830A Method of producing potassium sulfate with low-concentration flue gas sulphur dioxide |
| 05/13/2009 | CN101428829A Potassium sulfate produced with low-concentration flue gas sulphur dioxide and ammonium chloride potassium fertilizer |
| 05/13/2009 | CN101428828A Method for producing coarse-grain special mirabilite |
| 05/13/2009 | CN101428827A Method for producing ultrafine-grain special mirabilite |
| 05/06/2009 | CN101423232A Separation method of sodium sulfate salt and glycerol in 12-hydroxytearic acid production waste liquid |
| 04/23/2009 | US20090104106 Heating to dissolve glaserite in water to produce a saturated or nearly saturated solution, and cooling the solution to a -2.7-1.8 degrees C.to effect a conversion into a mixture of potassium sulfate and mirabilite, both as stable crystals; separation by froth flotationusing a sulfonated alkene |
| 04/22/2009 | CN201224685Y Drying apparatus for preparing anhydrous sodium sulfate |
| 04/22/2009 | CN101412526A Method for preparing sodium sulphite with tail gas from thionyl chloride synthesis process |
| 04/07/2009 | US7514053 Gas stream is contacted with a potassium-based sorbent (potassium bicarbonate) effective for removing at least a portion of the acid gases; contacted with an oxidant effective to remove at least a portion of the nitrogen oxides and/or mercury-containing substances after partially removing acid gas |
| 04/07/2009 | US7514051 Adding ferric sulfate to the aqueous crude sodium sulfate solution to form a suspension, progressively neutralizing the suspension from a pH of less than 3.5 up to at least 6, and separating the ferric-sulfate-nucleated precipitate from the suspension |
| 03/26/2009 | WO2009013728A4 Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates |
| 03/25/2009 | CN101391782A Method for simultaneous producing two different content industry anhydrous sodium sulfate |
| 03/24/2009 | US7507388 Process for production of dense soda, light soda, sodium bicarbonate and sodium silicate from solutions containing bicarbonate |
| 03/18/2009 | CN100469716C Processing method for mother solution and solium sulfite solution in naphthol production |
| 03/11/2009 | CN101381088A Production method for drying anhydrous sodium sulfate using fluidized bed |
| 03/11/2009 | CN100467415C Building and other materials containing treated bauxite tailings and process for making same |
| 03/05/2009 | WO2009026707A1 Process of removing calcium and obtaining sulfate salts from an aqueous sugar solution |
| 03/05/2009 | CA2697087A1 Process of removing calcium and obtaining sulfate salts from an aqueous sugar solution |
| 03/04/2009 | CN101376639A Method for coproduction of dispersants MF and sodium sulphite |
| 02/25/2009 | CN101372344A Production method of high-purity big particle industrial anhydrous sodium sulfate |
| 02/25/2009 | CN101372343A Method of producing potassium sulfate using desuifurized cinder |
| 02/25/2009 | CN100463855C New method of producing sodium sulfite and sodium sulfide using alkali sulfide reduction waste water |
| 02/17/2009 | US7491378 To produce electrode having high capacity, and charging and discharging efficiency |
| 02/04/2009 | CN100457624C Technique for preparing potassium sulphate in high purity by catalysis method |
| 01/29/2009 | WO2009013728A1 Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates |
| 01/28/2009 | CN101353354A Method for preparing low zinc low iron clarification rongalite |
| 01/27/2009 | US7481987 for reducing the fouling during the removal of sulfur trioxide from a flue gas stream by maintaining the sodium sesquicarbonate in contact with the flue gas for a sufficient time and temperature to react a portion of the reagent with a portion of the sulfur trioxide to substantially avoid formation |
| 01/14/2009 | CN101343038A Recovery method for mix waste gas of hydrogen chloride and sulphur dioxide in lipoic acid preparation |
| 01/14/2009 | CN100450929C Method for preparing large grain anhydrous sodium sulfate |
| 01/08/2009 | US20090012223 Alunite Type Compound Particles, Manufacturing Process Thereof and Use Thereof |
| 01/08/2009 | US20090011448 nonspecific reactions in the Limulus reaction can be inhibited conveniently, quickly, inexpensively and effectively; increased accuracy |
| 01/07/2009 | CN101337657A Process for disassembling phosphate ore by mixed acid and coproducing potassium dihydrogen phosphate, hydrogen phosphate and combined fertilizer |
| 12/31/2008 | CN101333046A Process for treating waste water in production of barium sulfate |
| 12/31/2008 | CN101332409A Flue-gas desulfurization system and method capable of reutilizing desulfurization by-products |
| 12/24/2008 | CN101327941A Potassium extraction production process of low grade potassium-containing mixing salt |
| 12/17/2008 | CN101323490A Method for zero discharge processing of waste saponification lye of cyclohexanone produced by cyclohexane oxidation technology |
| 12/17/2008 | CN101323458A Method for comprehensively processing petroleum acid slag and alkaline residue |
| 12/11/2008 | WO2008099354B1 Process of conversion of sulfur dioxide into salts of commercial interest |
| 12/10/2008 | CN101318671A Cleaning and recycling process for by-product sodium sulfite of cartap |
| 12/03/2008 | CN100439295C A process for manufacturing potassium sulfate fertilizer and other metal sulfates |
| 12/03/2008 | CN100439249C Process for producing sodium sulfate and sodium chloride in Na2SO4-NaCl-H2O system |
| 12/03/2008 | CN100439248C Process for recovery of potassium sulphate |
| 11/26/2008 | CN201154904Y External heating type vaporizing saltpeter-separating-out tank |
| 10/23/2008 | WO2008099354A3 Process of conversion of sulfur dioxide into salts of commercial interest |
| 10/15/2008 | CN101284276A Hydrogen potassium reaction tank cleaning method |
| 10/08/2008 | CN101280198A Processing method for waste pollutant in thiophen productioní¬sulphur-containing tar |
| 10/08/2008 | CN101279752A Novel process for producing kalium sulphuricum with waste sulfuric acid and straw |
| 10/01/2008 | CN101274761A Method for preparing white carbon black with joint production of anhydrous sodium sulfate by precipitation method |
| 10/01/2008 | CN100422083C Stabilizer for sodium sulfite |
| 09/10/2008 | CN100417594C Production process of large grain anhydrous sodium sulfate with natural salt lake mirabilite |
| 09/03/2008 | CN101254931A Technique for reclaiming mirabilite from diesel alkali dregs wastewater and comprehensive utilization thereof |
| 08/28/2008 | US20080206126 Higher than 30% concentration lime slurries, preparation and uses thereof |
| 08/28/2008 | US20080202387 Process For Producing Silica and Sodium Sulfite With Sodium Sulfate |
| 08/27/2008 | CN100413793C Treatment and special treater of waste water in making salt and nitro-group |
| 08/27/2008 | CN100413565C Treating method for sulphur dioxide flue gas |
| 08/21/2008 | WO2008099354A2 Process of conversion of sulfur dioxide into salts of commercial interest |
| 08/21/2008 | US20080199385 Process for Producing Silica and Sodium Sulfite with Sodium Sulfate |
| 08/21/2008 | US20080199384 quartz sand, sodium sulfate and carbon are charged into a thermal insulation horseshoe flame furnace; Sodium silicate Na2SO4 (water glass) intermediate; no sulfur dioxide emitted; simple steps, useful by-products and low production cost |