| Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848) |
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| 08/20/2008 | CN101244831A Method and device for recycling anhydrous sodium sulfate from desulfurization lead plaster filter liquor |
| 08/19/2008 | US7413855 Method for bisulfite treatment |
| 08/13/2008 | EP1955392A1 Method for synthesizing electrode material using polyol process |
| 08/06/2008 | CN101234829A Method for treating copper-containing acid-containing waste liquid produced by glucide displacement reaction |
| 08/06/2008 | CN101234827A Treatment and resource reclaiming method for chromium-containing wastewater containing high concentration sodium sulfate |
| 07/30/2008 | CN101229923A Novel technique for producing large-particle high-grade soft leonite from potassium mixed salt by hot crystallization |
| 07/30/2008 | CN101229922A Method for abstracting potassium from straw by microwave technique |
| 07/29/2008 | CA2402057C Process for purifying aqueous buffer solutions |
| 07/23/2008 | EP1945567A1 Improved process for the recovery of sulphate of potash (sop) from sulphate rich bittern |
| 07/23/2008 | CN101224899A Method for preparing sodium carbonate and sodium sulfate |
| 07/16/2008 | CN101219798A Method for extracting sodium bisulfate from sodium chlorite waste acid |
| 07/02/2008 | EP1478593A4 Aqueous borohydride compositions |
| 06/25/2008 | CN100396598C Process for producing sodium formate using liquid sulfur dioxide and sodium pyrosulfite |
| 06/18/2008 | CN101200285A Method for producing polychloroethylene and hydrochloric acid |
| 05/29/2008 | WO2008063123A1 Leaching of chloride and potassium from electric filter ashes |
| 05/28/2008 | CN101186315A Method for producing (standard) sodium pyrosulfite from sodium sulfite |
| 05/28/2008 | CN101185817A Method for preparing nano alumina fiber film material |
| 05/28/2008 | CN100390061C Method for preparing anhydrous sodium sulfite using industrial by-product anhydrous sodium sulfate |
| 05/27/2008 | CA2343952C Process for producing potassium sulfate from potash and sodium sulfate |
| 05/21/2008 | CN101184694A Process for producing silica and sodium sulfite with sodium sulfate |
| 05/21/2008 | CN101184693A Process for producing silica and sodium sulfite with sodium sulfate |
| 05/07/2008 | CN101172625A Granulation method of anhydrous sodium sulfate |
| 05/07/2008 | CN100386129C Process for preparing potassium sulfate by sea water |
| 04/23/2008 | CN101164921A Salt-containing waste water treatment method for meta-cresol production |
| 04/23/2008 | CN100383045C Method for preparing potassium sulfate by utilizing brine pan potassium as raw material |
| 04/02/2008 | CN100377998C Method for extracting sodium sulfate from waste water containing salt and ammonia |
| 03/26/2008 | CN101148261A Low-phosphorus low-boron high-pure anhydrous sodium carbonate and preparation method thereof |
| 03/20/2008 | US20080070240 Composition for deaminating dna and method of detecting methylated dna |
| 03/19/2008 | CN100375714C Process for preparing anhydrous mirabilite by freezing method |
| 02/20/2008 | EP1888462A1 A process for producing silica and sodium sulfite with sodium sulfate |
| 02/20/2008 | EP1888461A1 A process for producing silica, sodium sulfite and sodium hydrogen sulfite with sodium sulfate |
| 02/20/2008 | EP1888460A1 A process for producing silica and sodium sulfite with sodium sulfate |
| 02/13/2008 | CN101121536A Combination preparation method for anhydrous magnesium chloride and potassium sulphate |
| 01/16/2008 | EP1877340A1 Methods of forming an alkali metal salt |
| 01/16/2008 | CN101104533A Method for treating waste water of H-acid production |
| 01/09/2008 | CN100360408C New technology of magnesium eliminating refining glauber salt using water washing method |
| 12/26/2007 | CN101092422A Method for producing rongalite with low zinc |
| 12/26/2007 | CN101092272A Method for treating wastewater from production of vanadium oxide |
| 12/12/2007 | CN100354483C Saltpeter-shovelling and collecting machine |
| 11/07/2007 | CN101066824A Process of treating and reusing effluent from 1-amino-8-naphthol-3, 6-disulfonic acid production |
| 11/07/2007 | CN101066771A Microwave radiation process for producing potassium sulfate |
| 11/07/2007 | CN101066770A Process of preparing potassium sulfate with potassium containing bittern of magnesium sulfate subtype |
| 10/31/2007 | CN100345754C Process for producing white carbon black and sodium sulphite by sodium sulfate method |
| 10/24/2007 | CN101058408A Method of reclaiming and using high-pollution low-concentration waste acid |
| 10/17/2007 | CN101054189A Method of preparing sea crystal from byproduct salt of refining iminodiacetic acid |
| 10/17/2007 | CN101053740A Treating method for sulphur dioxide flue gas |
| 09/26/2007 | CN101044091A Method for crystallizing soluble salts of divalent anions from brine |
| 09/26/2007 | CN101041521A H acid waste water by natrium chloratum addition process |
| 09/26/2007 | CN101041498A Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor |
| 09/26/2007 | CN101041445A Method for preparing potassium salt by polarity solvent extraction process |
| 09/26/2007 | CN101041444A Method freezing separating mirabilite by brine solution |
| 09/25/2007 | US7273579 Adding an aluminum chloride or chlorine crystal modifier to a dilute aqueous slurry of gypsum and a cellulosic fiber to increase the aspect ratio of hemihydrate crystals to at least 5:1; dewatering the hot slurry and shaping to form a composite product before rehydrating the hemihydrate back to gypsum |
| 09/19/2007 | EP1590362B1 Improved method for bisulfite treatment |
| 09/19/2007 | CN100337906C Method for recycling high polluted low concentration waste acid |
| 09/12/2007 | EP1831102A1 Chemical process and apparatus |
| 08/29/2007 | CN101024501A Vanillin copper-contained 'mixed crystal' waste catalyst regneration and separation method |
| 08/15/2007 | CN1331744C Process for producing white carbon black and sodium sulphite by sodium sulfate method |
| 08/08/2007 | CN2931449Y Potassium sulfate reaction furnace |
| 08/02/2007 | US20070178466 Sulfite mixture of ammonium sulfite, ammonium bisulfite, and/or sodium bisulfite for use in determining/characterizing nucleic acid sequences; genomic analysis; amplifying DNA |
| 08/01/2007 | CN101007640A Method for preparing large grain anhydrous sodium sulfate |
| 07/25/2007 | CN1328234C SO2 acidifying process of producing coarse phenol and co-producing anhydrous sodium sulfite |
| 07/18/2007 | EP1807349A1 Method for crystallizing soluble salts of divalent anions from brine |
| 07/18/2007 | CN100999994A Mining method of potassium salt magnesium vanadium salt mine |
| 07/18/2007 | CN100999327A Method of extracting industrial anhydrous sodium sulfate from waste water in silicone dioxide production using precipitation method |
| 07/11/2007 | CN1994932A Method for circulated utilization of mother liquor of alpho-naphthol, beta-naphthol ethyl naphthol production |
| 06/27/2007 | CN2915834Y Crystallizer for salt cake separation using freeze method |
| 06/27/2007 | CN1986406A Production process of large grain anhydrous sodium sulfate with natural salt lake mirabilite |
| 06/20/2007 | CN1321893C Preparation of potassium sulfate from brine containing potassium magnesium sulfate |
| 06/06/2007 | CN1319850C Aqueous borohydride compositions |
| 05/29/2007 | CA2348494C Process for the recovery of sulphur from lead-acid battery scrap |
| 05/18/2007 | WO2007054953A1 Improved process for the recovery of sulphate of potash (sop) from sulphate rich bittern |
| 05/16/2007 | CN1962443A Improved process for the recovery of sulphate of potash (sop) from sulphate rich bittern |
| 05/02/2007 | EP1421043B1 A process for manufacturing potassium sulfate fertilizer and other alkali/alkali earth metal sulfates |
| 04/18/2007 | CN1948153A New method of producing sodium sulfite and sodium sulfide using alkali sulfide reduction waste water |
| 04/11/2007 | CN1944256A Process for producing sodium sulfate and sodium chloride in Na2SO4-NaCl-H2O system |
| 04/04/2007 | CN1308265C Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction |
| 03/22/2007 | US20070065357 Cellular phone with push to talk over cellular (POC) service |
| 03/22/2007 | DE102005045055A1 Preparation of potassium sulfate from potassium chloride and sulfuric acid without accumulation of hydrogen chloride or hydrochloric acid comprises reacting potassium chloride, sulfuric acid and basic magnesium compound |
| 03/22/2007 | DE102005045054A1 Preparing potassium sulfate comprises reacting sulfuric acid and potassium chloride, reacting the obtained potassium hydrogen sulfate with magnesium oxide to give magnesium sulfate followed by reacting with potassium chloride and water |
| 03/21/2007 | EP1763357A1 Using organic and/or inorganic potassium and its salts to treat autoimmune and other health disorders and methods of administering the same |
| 03/21/2007 | CN1931722A Stabilizer for sodium sulfite |
| 02/21/2007 | CN1915823A Method for preparing sodium sulfate in high purity |
| 02/14/2007 | CN1914032A Improved process for production of gypsum/fiber board |
| 02/14/2007 | CN1911801A Technology for preparating boric acid, magnesium carbonate and sodium sulphate by combined method |
| 01/03/2007 | CN1887729A Method of purifying O-phenylenediamine sodium sulfide reducing waste water |
| 12/27/2006 | CN1886339A Process for recovery of potassium sulphate |
| 12/27/2006 | CN1884086A Technology for combined production of barium chloride, potassium carbonate, potassium sulfate, and hydrochloric acid by potassium chloride method |
| 12/20/2006 | CN1880224A Gypsum-ammonia circulation method for combined production of barium chloride, potassium sulfate |
| 12/20/2006 | CN1880223A Saltcake-ammonia circulation method for combined production of barium chloride, potassium sulfate, sodium carbonate |
| 12/14/2006 | WO2006131066A1 A process for producing silica and sodium sulfite with sodium sulfate |
| 12/14/2006 | WO2006131065A1 A process for producing silica, sodium sulfite and sodium hydrogen sulfite with sodium sulfate |
| 12/14/2006 | WO2006131064A1 A process for producing silica and sodium sulfite with sodium sulfate |
| 11/15/2006 | CN1284725C Method of producing sodium formate method sodium hydrosulfite using liquid sulfur dioxide and solid sodium carbonate |
| 11/08/2006 | CN1858010A Processing method for mother solution and solium sulfite solution in naphthol production |
| 11/02/2006 | WO2006115830A1 Methods of forming an alkali metal salt |
| 10/26/2006 | US20060239900 Methods of forming an alkali metal salt |
| 10/25/2006 | CN1281496C Floatation process of preparing potassium sulfate |
| 10/11/2006 | EP1708875A1 Improved process for production of gypsum/fiber board |
| 09/27/2006 | CN1837050A Process for preparing anhydrous mirabilite by freezing method |
| 09/20/2006 | CN1275858C Method and apparatus for directly preparing K2SO4 after low concentration SO2 smoke gas absorbing oxidation |