| Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848) |
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| 03/14/1995 | CA1334721C Method for the production of potassium sulfate |
| 03/09/1995 | WO1995006775A1 Minimum adverse environmental impact pulp mill |
| 03/09/1995 | CA2170594A1 Minimum adverse environmental impact pulp mill |
| 03/08/1995 | CN1099724A Pure natural plant alkaloid and preparing method |
| 02/28/1995 | US5393503 Reacting sodium chromate and sulfuric acid producing sodium bichromate, and sodium sulfate. sodium bichromate reacts with sulfuric acid forming chromic acid and sodium bisulfate, sulfuric acid is regenerated for reuse |
| 02/15/1995 | EP0638518A2 Process for the electrolysis of an aqueous solution of potassium chloride |
| 02/15/1995 | CN1098702A Production of potashsium sulfate with assistant method |
| 02/05/1995 | CA2129280A1 Method for the electrolysis of an aqueous potassium chloride solution |
| 01/31/1995 | US5385671 Magnesium hydroxide recovery |
| 01/26/1995 | DE4340105C1 Process for the continuous preparation of potassium sulphate from sodium sulphate |
| 01/24/1995 | US5383952 Process for binding dust in fertilizer granules |
| 01/11/1995 | CN1097178A Method for preparation of potassium sulfate by the liquid phase convertion of potassium chloride and sulfuric acid |
| 01/04/1995 | CN1096993A Process for removing chlorine ions during the prodn. of potassium sulfate |
| 12/20/1994 | CA1333548C Method for granulating potassium-sulphate |
| 12/15/1994 | DE4340839C1 Process for the utilisation of waste sodium sulphate |
| 11/22/1994 | US5366710 Process for removing nitrogen oxides and sulfur oxides from gaseous stream |
| 11/17/1994 | DE4340806C1 Process for the preparation of potassium sulphate |
| 11/09/1994 | EP0623554A1 Treatment of an aqueous stream containing water-soluble inorganic sulfide compounds to selectively produce the corresponding sulfate |
| 11/02/1994 | CN1094458A Process of producing chlorine dioxide |
| 10/19/1994 | CN1093680A Method for preparing lemery salt by use of ammonium sulfate and potassium chloride |
| 10/19/1994 | CN1093679A Method for preparation of lemery salt |
| 09/20/1994 | US5348695 Process for the preparation of salt granulates |
| 09/15/1994 | WO1994020675A1 Zero discharge mill distillation, salt recovery, and water management |
| 09/15/1994 | CA2155439A1 Zero discharge mill distillation, salt recovery, and water management |
| 08/31/1994 | EP0612685A2 Process for producing chlorine dioxide |
| 08/24/1994 | CN1091112A Preparation of potassium sulfate by circulating double decomposition of ammonium sulfate and potassium chloride |
| 08/16/1994 | US5338530 Precipitating solid mixture of glycine and sodium sulfate decahydrate and separating |
| 07/20/1994 | CN1089577A Prepn. of potassium sulphate by ammoniation method |
| 07/20/1994 | CN1089576A Method for prepn. of potassium sulphate |
| 07/20/1994 | CN1089575A Process for prodn. of potassium sulphate using benzene dilution method |
| 06/22/1994 | CN1088180A Metathesis of acidic by-product of chlorine dioxide generating process |
| 06/01/1994 | CN1087320A New method for producing potassium sulfate |
| 05/26/1994 | WO1994011300A1 Metathesis of acidic by-product of chlorine dioxide generating process |
| 05/24/1994 | CA2023452C Process for production of chlorine dioxide |
| 05/11/1994 | EP0596712A1 Magnesium hydroxide revovery |
| 05/10/1994 | CA2082473A1 Sulphate removal process |
| 04/28/1994 | WO1994008901A1 High water solubility potassium sulfate and method of producing same |
| 04/12/1994 | US5302246 Method of managing liquid steams in a pulp mill |
| 04/05/1994 | US5300123 Method of reforming soluble salts to effect purification and increase crystal size thereof |
| 03/30/1994 | CN1084492A Process for preparation of potassium sulfate from bittern and potassium chloride |
| 03/29/1994 | US5298050 Fertilizer |
| 03/17/1994 | WO1994005400A1 Desulphurization of flue gases |
| 03/03/1994 | WO1994005054A1 Process for disposing of sodium-sulphur accumulator cells |
| 03/03/1994 | DE4228471A1 Rauchgasentschwefelung Flue gas desulfurization |
| 03/03/1994 | CA2141575A1 Process for disposing of sodium-sulphur accumulator cells |
| 02/16/1994 | CN1082002A Process for refining sodium sulfate |
| 02/16/1994 | CN1082001A Neutralizing synthesization for preparing potassium sulfate |
| 01/19/1994 | EP0395740B1 Process for purifying aqueous buffer solutions |
| 01/12/1994 | CN1080617A Producing process for potassium sulfate |
| 01/05/1994 | CN1080290A Comprehensive utilization method of tea waste |
| 11/30/1993 | US5266296 Cocurrent flow process for the manufacture of sodium sulfite and bisulfite solutions |
| 11/24/1993 | CN1078705A Process for producing potassium sulfate and by-product of magnesium chloride |
| 11/11/1993 | DE4214951A1 Charging and regenerating coarse ion exchanger granules in cage - which is permeable for liquids and fines, used e.g. for efficient prodn. of potassium sulphate from gypsum with min. loss |
| 10/20/1993 | CN1077434A Pren. method of potassium sulfate from bittern and potassium chloride |
| 07/14/1993 | CN1074194A Process for production of nitre |
| 07/13/1993 | US5227031 Process for the production of chlorine dioxide |
| 06/28/1993 | CA2086153A1 Process for the preparation of anhydrous sodium sulfate from a brine |
| 06/28/1993 | CA2082454A1 Process for the direct preparation of anhydrous sodium sulfate |
| 06/22/1993 | US5221528 Process for the preparation of sodium chloride |
| 05/19/1993 | EP0542351A1 Process for the preparation of salt granulates |
| 05/04/1993 | US5207927 Catalytic oxidation using metal phthalocyanine; sulfation; water pollution control |
| 04/28/1993 | EP0538576A1 Process for recovery of chemicals from the pulping liquor |
| 04/28/1993 | CN1020376C Prepn. of high grade picromerite by cold/hot process |
| 04/27/1993 | US5205995 Converting sodium sesquisulfate to anhydrous neutral sodium sulfate |
| 04/07/1993 | EP0535113A1 Methanol-based chlorine dioxide process. |
| 03/10/1993 | CN1069709A A new method of refining sodium sulphate |
| 03/10/1993 | CA2076455A1 Process for making chromic acid |
| 02/03/1993 | EP0525700A1 Process for surface treatment of granules |
| 02/02/1993 | CA2075143A1 Process for surface treatment of granules |
| 12/23/1992 | CN1067224A Metathesis of acidic by-product of chlorine dioxide generating process |
| 12/16/1992 | CN1067027A Air-flow drying system for preparing mirabilite with flat pot |
| 11/18/1992 | CN1019093B Sodium dihydrogen phosphate salt and the method for making same |
| 10/23/1992 | WO1992018424A1 Metathesis of acidic by-product of chlorine dioxide generating process |
| 10/14/1992 | CN1018627B Granular potassium sulfate and process for producing same |
| 10/13/1992 | CA1308822C Selective removal of nitrate ions from salt solutions |
| 09/16/1992 | CN1064459A Method for comprehensive utilization of sodium sulfate containing chromium |
| 07/02/1992 | DE4142919A1 Drying of salts for fire extinguisher powder production |
| 07/01/1992 | EP0492727A1 Process for the preparation of sodium chloride |
| 07/01/1992 | CN1062332A Process for producing high-purity solution of sodium bisulfite |
| 06/23/1992 | CA1303815C Method for neutralization treatment of sulfuric acid containing iron ions |
| 06/23/1992 | CA1303813C Process and apparatus for the production of sodium hydrosulfite |
| 06/03/1992 | EP0488199A1 Process for granulating potassium salts |
| 06/03/1992 | CN1016864B Prodn method of sadium dithionite with improved purity and granularity |
| 05/28/1992 | CA2056240A1 Process for granulating potassium salts |
| 05/27/1992 | CN1016774B Dry process for neutralizing potassium sulfate produced from potassium chloride and sulfuric acid |
| 05/26/1992 | US5116595 Metathesis of acidic by-product of chlorine dioxide generating process |
| 04/28/1992 | US5108726 Compacts of spray dried water soluble compounds |
| 04/28/1992 | US5108625 Process for removing sodium sulfate from aqueous buffer solutions |
| 04/08/1992 | CN1060084A Process for producing potassium dihydrogen phosphate and potassium sulfate |
| 04/08/1992 | CN1016156B Process of improvement of saltcake quality |
| 03/10/1992 | CA1296867C Process for selectively removing sulfur dioxide |
| 03/04/1992 | EP0473560A1 Process for the production of chlorine dioxide |
| 03/04/1992 | EP0473559A1 Process for the production of chlorine dioxide |
| 03/04/1992 | CN1059132A Improved method for prodn. of potassium sulphate |
| 03/03/1992 | US5093089 From chromium species, acidification, crystallization |
| 02/25/1992 | US5091167 Process for the production of chlorine dioxide |
| 02/25/1992 | US5091166 Reacting alkali metal chlorate with mineral acid; bleaching paper pulp |
| 02/12/1992 | CN1015435B Extracting potassium sulphate and its by-products magnesium sulfate, etc. from gypsum and halogen chroismite |
| 01/29/1992 | CN1058240A Process for separation of sulphate |
| 01/29/1992 | CN1058193A Methanol-based chlorine dioxide process |