Patents
Sitemap › C01 - Inorganic chemistry › C01D - Compounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium › C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general
Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848)
07/1997
07/30/1997CN1155528A Preparation of potassium-magnesium alum
07/30/1997CN1155515A New method for producing potassium sulfate
07/29/1997US5651796 Method for producing low bulk density hollow fine powder of alkali metal compound
07/16/1997CN1035430C Method for producing potassium sulfate
07/09/1997CN1153767A Formic acid and sodium sulfate producing method
07/02/1997CN1153140A Method for producing potassium sulfate, iron protocarbonate and compound fertilizer using waste acid liquor from titanium pigment plant
07/02/1997CN1153139A Raw stock and method for producing sodium metasilicate pentahydrate, anhydrous quick-dissolving sodium metasilicate 4A molecular sieve and potassium sulfate
06/1997
06/25/1997CN1152549A Technology for preparing potassium sulfate by two-stage method
06/17/1997US5639434 Adding chlorine dioxide and ozone to flue gas, reducing nitrogen oxide product with sodium hydroxide
05/1997
05/21/1997CN1150121A Salting out process for producing potassium sulfate
05/13/1997US5628974 Process for treating by-products of lithium/sulfur hexafluoride
05/09/1997WO1997016377A1 Composition containing at least sodium bicarbonate, preparation method therefor and uses thereof
05/09/1997WO1997016376A1 Method for processing flue gases containing sulphur oxides
04/1997
04/29/1997US5624649 Process for reduction of sulfur dioxide emission from combustion gases combined with production of potassium sulfate
04/16/1997CN1147480A Continuous potassium sulfate producing method and equipment
04/09/1997CN1146982A Process for producing potassium sulfate and its by-product using potassium ore
04/02/1997EP0431091B1 Process for binding dust in fertilizer granules
03/1997
03/22/1997CA2160401A1 Stabilization of catalyzed aqueous sulfite and bisulfite ion solutions
03/12/1997CN1144772A Technology for preparing potasium sulfate by cold salting-out circulation method
03/05/1997CN1034173C Method for separating coffeine from tea waste
02/1997
02/19/1997CN1034067C Method for producing potassium sulfate by double decomposition of ammonium sulfate and potassium chloride
01/1997
01/22/1997EP0663891A4 High water solubility potassium sulfate and method of producing same.
01/15/1997CN2245058Y Fuyuan powdered coal furnace for producing potassium sulfate
01/15/1997CN2245057Y Reactor for producing potassium by using phosphogypsum
01/14/1997US5593653 Metathesis of acidic by-product of chlorine dioxide generating process
01/14/1997US5593651 Absorption of gaseous effluents in ammonium, alkali metal or alkaline earth metal sulfites and bisulfites
12/1996
12/25/1996CN1138557A Method for preparing potassium sulphate
10/1996
10/30/1996CN1033157C Granular potassium sulfate and process for producing the same
10/22/1996US5567406 Reacting potassium hydroxide and sulfur dioxide, adding hypophosphorous acid to react with any iron present to clarity solution
10/15/1996US5565182 Reacting alkali metal chlorate, sulfuric or phosphoric acid and hydrogen peroxide in aqueous medium
10/09/1996CN1132723A Sludge and impurity removing technology for argillaceous glauberite ore
10/09/1996CN1132722A Reproduction extraction of potassium sulphate with industrial and agricultural waste
10/02/1996CN1132180A Method for prodn. of potassium sulfate by NaSO4 and KCl through metathesis
09/1996
09/25/1996EP0656806B1 Desulphurization of flue gases
09/25/1996CN1131640A Method for preparing potassium sulfate by metathesis of potassium chloride and ammonium sulfate
09/25/1996CN1131639A Method for preparing potassium sulfate with sulfate type bittern
09/18/1996CN1032804C Method for production of potassium sulphate using ammonium sulphate and potassium chloride
09/11/1996CN1130596A Process for producing potassium sulfate
09/04/1996CN1130152A Process for producing potassium sulfate from bittern and potassium chloride
09/03/1996US5552126 Co-production of potassium sulfate, sodium sulfate and sodium chloride
08/1996
08/28/1996EP0728864A2 Zero discharge pulp mill cascading water management
08/28/1996CN1032642C Improved process for preparing potassium sulfate
08/27/1996US5549876 Production of potassium sulfate using differential contacting
08/27/1996US5549788 Minimal effluents discharge pulp mill with chemical recovery
08/22/1996WO1996025360A1 Method for preparing a salt, particularly potassium chloride, by leaching and cooling a solution thereof
08/21/1996CN1032582C Ammoniation method for preparation of lemery salt
07/1996
07/31/1996CN1127676A Method for producing low bulk density hollow fine powder of alkali metal compound
07/24/1996CN1127220A One-step method for preparing potassium sulfate
07/18/1996DE19502067A1 Hydrate-forming salt purification
07/16/1996CA2028293C Method for treating zinc-containing sulfate solution
07/03/1996EP0719359A1 Minimum adverse environmental impact pulp mill
06/1996
06/25/1996US5529764 Co-production of potassium sulfate and sodium sulfate
06/19/1996CN1124717A Production of potassium sulfate by conversion process
06/06/1996WO1996016901A1 Process for making chromium-free orthorhombic sodium sulfate
06/06/1996WO1996016900A1 Co-production of potassium sulfate, sodium sulfate and sodium chloride
06/06/1996WO1996016899A1 Co-production of potassium sulfate and sodium sulfate
05/1996
05/29/1996CN1123248A Method for directly preparing Lemery salt by using salt-cake (gypsum) type bittern or mother liquid for preparing salt (saptpetre) or mirabilite mineral bittern
05/28/1996US5520902 Process for making chromium-free orthorhombic sodium sulfate
05/21/1996US5518583 Minimizing effluents from a cellulose pulp mill
05/08/1996CN1121899A Process for low temp. production of potassium sulfate
04/1996
04/03/1996CN1119625A Method for preparation of potassium sulfate by sodium sulfate method
03/1996
03/13/1996CN1118336A Process for purifying potassium sulphate
03/13/1996CN1118335A Non-recovery process for producing potassium sulphate by Mannheim furnace
03/13/1996CN1118333A Process for extracting soluble non-sulfur potassium salt from feldspar
02/1996
02/14/1996EP0696551A1 Method of producing low bulk density hollow fine powder of alkali metal compound
02/14/1996EP0656154B1 Process for disposing of sodium-sulphur accumulator cells
02/04/1996CA2155365A1 Method for producing low bulk density hollow fine powder of alkali metal compound
01/1996
01/30/1996US5487881 Process of producing chlorine dioxide
01/10/1996CN1114635A Process for producing potassium sulfate by plaster stone conversion method
01/09/1996US5482696 Precipitating potassium sulfate
12/1995
12/20/1995EP0687323A1 Zero discharge mill distillation, salt recovery, and water management
12/06/1995CN1030443C Metathesis of acidic by-product of chlorine dioxide generating process
11/1995
11/29/1995CN1112535A Technology for producing potassium sulfate by gas-liquid reaction method
11/15/1995CN1111598A Concentration nitre extracting technology by acid bath one-step method
10/1995
10/18/1995EP0667835A4 Metathesis of acidic by-product of chlorine dioxide generating process.
09/1995
09/27/1995EP0535113B1 Methanol-based chlorine dioxide process
09/20/1995EP0672447A1 Process for the treatment of gases containing sulphur dioxide
09/20/1995CN1108614A Combination method for production of potassium sulfate
09/20/1995CN1029781C Method for production of high-purity sodium bisulfite solution
09/20/1995CN1029778C Methanol-based chlorine dioxide process
09/13/1995EP0671361A1 Process for production of pure free-flowing alkali or alkaline earth salts from residual salts from the production of polyether polyols
09/06/1995CN1107805A Double compounding method for preparing potassium sulfate
08/1995
08/30/1995EP0669284A1 Precipitation process for potassium sulphate
08/23/1995EP0667835A1 Metathesis of acidic by-product of chlorine dioxide generating process
08/03/1995DE4402538A1 Continuous prodn. of coloured ultramarine pigment without pollution
07/1995
07/26/1995EP0663891A1 High water solubility potassium sulfate and method of producing same
06/1995
06/28/1995CN1104178A Method for production of Lemery salt
06/22/1995DE4342909A1 Verfahren zur Aufarbeitung von chromhaltigem Natriumhydrogensulfat The method for the reprocessing of chromium containing sodium hydrogen sulfate
06/14/1995EP0656806A1 Desulphurization of flue gases.
06/07/1995EP0656154A1 Process for disposing of sodium-sulphur accumulator cells.
05/1995
05/24/1995CN2198261Y Reflective furnace for producing potassium sulfate
05/09/1995CA1335489C Method for producing crystallisates out of solutions, more particularly salt-solutions, such as potassium-salt solutions, for example, by cold-crystallization
04/1995
04/26/1995CN1101895A Process for producing potassium sulfate
04/05/1995EP0646094A1 Metathesis of acidic by-product of chlorine dioxide generating process
03/1995
03/29/1995CN1100699A Method for prodn. of potassium sulphate using ammonium sulphate and potassium chloride
03/23/1995DE4331749A1 Process for producing building materials
03/22/1995CN1100383A Liquid phase conversion process for producing potassium sulfate with sulfuric acid and potassium chloride
03/21/1995US5399332 Dynamic leaching procedure for metathesis
03/21/1995CA1334821C Method of reforming soluble salts to effect purification and increase crystal size thereof
03/15/1995CN1027883C Process for preparing potassium sulfate using bittern and potassium chloride
1 ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19