| Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848) |
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| 05/13/1986 | US4588567 Recovery of concentrated H2 S from SO2 contained in flue gas |
| 04/29/1986 | CA1203666A1 Process for the manufacture of potassium sulphate by treatment of solutions containing magnesium chloride and potassium chloride |
| 03/04/1986 | US4574076 Removal of hydrogen sulfide from geothermal steam |
| 02/11/1986 | US4569676 Separation and purification of salts in a non-convective solar pond |
| 02/11/1986 | CA1200364A1 Gypsum conversion |
| 01/10/1986 | CN85100373A Process for producing refined salt and na2so4 with oresalt dissolved halogen |
| 12/31/1985 | US4562058 Process for crystallizing potassium sulfate |
| 12/10/1985 | US4557873 Process for isolating paraffinsulfonates and sulfuric acid of low alkali metal sulfate content from parafinsulfoxidation reaction mixtures |
| 12/10/1985 | CA1197663A1 Potassium sulfate from magnesium sulfate |
| 11/26/1985 | CA1197068A1 Treatment of brine elutriate |
| 11/19/1985 | US4554151 Double salt of potassium bisulfate and potassium sulfate |
| 11/19/1985 | US4554139 Process for producing and decomposing syngenite |
| 10/30/1985 | EP0159615A2 New, permanent flame retardant and anti-smouldering compositions |
| 10/16/1985 | EP0158235A2 Process for the removal of residual sulfonic acid from the reaction mixture formed during the sulfoxidation of paraffines |
| 10/15/1985 | US4547197 Purification of a salt solution by evaporation and simultaneous cooling and crystallization |
| 10/08/1985 | US4545961 Multi-compartment disc reactor with improved gas inlet manifold |
| 08/20/1985 | US4536418 Applying anticaking agent to particular streams, agitation, passing through fluidized beds |
| 08/06/1985 | US4533536 Improved by adding sodium sulphate |
| 07/16/1985 | CA1190401A1 Process for treating sulphated lead compounds for recovering metallic lead and a high-purity sulphate and an installation therefor |
| 06/05/1985 | EP0143416A2 Process for the recovery of paraffin sulfonates, poor in alkali sulfates from paraffin sulfoxidation reaction mixtures |
| 04/30/1985 | US4514326 Mixture of ammonium pentaborate and an alkali or alkalin sulfate, sulfite and/or hydrophosphate; cellulose insulation |
| 03/12/1985 | US4504546 Method for flame retarding material with ammoniumtriborate |
| 03/12/1985 | US4504458 Gypsum conversion |
| 11/20/1984 | US4483740 Method for recovery of reusable chemicals from C102 generator effluent |
| 11/06/1984 | US4481074 Using liberated carbon dioxide for pressurized carbonation of green liquor |
| 11/06/1984 | CA1177223A1 Method of treating converted potassium sulfate for reducing a small amount of chlorine contained therein |
| 11/06/1984 | CA1177222A1 Apparatus for producing an alkali metal salt of a mineral acid, and a process |
| 08/08/1984 | EP0114974A2 Process for decomposing sodium hydroxide containing multiple salts |
| 06/26/1984 | CA1169630A1 Process for producing potassium sulfate |
| 05/01/1984 | CA1166426A1 Aluminum electrolytic cell cathode waste recovery |
| 05/01/1984 | CA1166425A1 Method of manufacturing potassium sulfate |
| 05/01/1984 | CA1166424A1 Production of alkali metal sulfates |
| 03/13/1984 | US4436710 Method of manufacturing potassium sulfate |
| 02/07/1984 | US4430310 Purification of impure Bayer process liquors |
| 02/07/1984 | EP0091948A4 Flowing melt layer process for production of sulfides. |
| 01/24/1984 | US4427637 Muffle furnace with agitation means |
| 12/13/1983 | US4420468 Pulverization, calcining |
| 10/26/1983 | EP0091948A1 Flowing melt layer process for production of sulfides |
| 10/05/1983 | EP0090109A1 The recovery of alkali metal catalyst constituents by the use of sulphurous acid in a coal conversion process |
| 08/23/1983 | CA1152264A1 Process for the preparation of cooking liquor |
| 07/27/1983 | EP0084337A1 Process for preparing sodium bisulphate |
| 07/05/1983 | CA1149131A1 High efficiency production of chlorine dioxide |
| 06/14/1983 | US4388282 Method for regeneration of sodium sulfite from spent flue gas desulfurization processes |
| 05/31/1983 | US4385920 Granulation of potash salts |
| 05/03/1983 | US4382025 Reacting alkali metal or alkali earth metal borate with ammonium sulfite in methanol |
| 04/28/1983 | WO1983001437A1 Flowing melt layer process for production of sulfides |
| 04/05/1983 | US4379130 Process for regenerating scrubbing solutions |
| 03/22/1983 | CA1143134A1 Process of producing a potassium sulfate salt |
| 03/08/1983 | CA1142328A1 Apparatus for continuously producing potassium sulfate |
| 03/08/1983 | CA1142324A1 Preparation of useful mgcl.sub.2 solution with subsequent recovery of kc1 from carnallite |
| 02/01/1983 | US4371512 Production of alkali metal sulfates |
| 11/25/1982 | WO1982004036A1 Recovery of fluoride values from carbonaceous materials |
| 11/24/1982 | EP0065412A1 Process for conversion of sulphuric acid waste (for example from titanium dioxide) into useful products |
| 10/19/1982 | US4355017 Aluminum electrolytic cell cathode waste recovery |
| 09/21/1982 | US4350826 Process for preparing p-hydroxy phenylglycine |
| 08/31/1982 | US4347226 Method for treating sulfur-containing effluents resulting from petroleum processing |
| 08/31/1982 | US4347225 Combustion with oxygen and hydrogen sulfide to form sulfate |
| 08/11/1982 | EP0057608A1 Production of alkali metal sulfates |
| 08/10/1982 | CA1129174A1 Process for recovery of chemicals from saline water |
| 08/03/1982 | US4342737 Reacting sulfuric acid with potassium chloride to produce a low chlorine content in the salt |
| 06/15/1982 | US4334893 Recovery of alkali metal catalyst constituents with sulfurous acid |
| 05/25/1982 | US4331636 Calcining with chloride, chlorination, crystallization, calcining |
| 05/04/1982 | US4328196 Production of alkali metal products from alkali metal fluosilicate |
| 04/20/1982 | US4325934 Production of chlorine dioxide with conversion of by-product solid phase sodium acid sulphate to its neutral form |
| 12/22/1981 | US4306880 Recovering by-products from sea water brines and the like |
| 12/01/1981 | US4303619 Apparatus for continuously producing potassium sulfate |
| 10/20/1981 | US4296079 Method of manufacturing aluminum sulfate from flue gas |
| 09/29/1981 | US4292227 Polyelectrolytes |
| 08/04/1981 | CA1106154A1 Granulation of potash salts |
| 08/04/1981 | CA1106135A1 Process for producing boron compounds from borate ores |
| 06/30/1981 | CA1103886A1 Process for dehydrating hydrated salt in solar ponds |
| 05/19/1981 | US4268492 Process for production of potassium sulfate and hydrochloric acid |
| 03/31/1981 | US4259082 Process for purifying sodium sulfate crystals |
| 03/03/1981 | CA1096590A1 Sodium oxide fume for sulfur oxide removal |
| 02/03/1981 | US4248838 Preparation of useful MgCl2. solution with subsequent recovery of KCl from carnallite |
| 01/20/1981 | CA1093831A1 Uranium extraction |
| 01/20/1981 | CA1093786A1 Production of sodium sulfite |
| 12/30/1980 | US4242312 Removal of sodium sulfate from a sulfate-containing sodium chloride solution in a process for separating zirconium and hafnium |
| 11/25/1980 | US4235861 From iron sulfate oxidized in air |
| 09/30/1980 | CA1086873A1 Process for the purification of waste water |
| 09/03/1980 | EP0015016A1 Process for producing anhydrous sodium sulphate from Glauber's salt |
| 07/29/1980 | US4215100 Method of producing potassium sulfate |
| 07/01/1980 | CA1080443A1 Absorption of sulfur oxides from hot gases |
| 06/24/1980 | US4209312 Adding ferric ions |
| 06/17/1980 | CA1079492A1 Process for removing sulfur dioxide from a gas stream |
| 06/17/1980 | CA1079482A1 Method of separating sulfuric acid from neutral sodium sulphate |
| 06/03/1980 | US4206187 Process for removing sulfur dioxide from gas |
| 05/27/1980 | CA1078139A2 Production of chlorine dioxide |
| 04/15/1980 | US4198380 Scrubbing with a aqueous alkali metal carbonate an:/or bicarbonate to produce a dry powder of the corresponding sulfa es and sulfites |
| 04/01/1980 | US4196177 Process for producing boron compounds from borate ores |
| 03/25/1980 | US4195070 Preparation of a MgCl2 solution for Nalco's MgCl2 process from MgSO4 and other MgSO4 salts |
| 03/11/1980 | CA1073185A1 Method for the large-scale industrial obtaining of magnesium oxide of high purity |
| 01/15/1980 | CA1069672A1 Method and apparatus for preparing aqueous solutions of pure sodium hydrosulfite and composition of matter for such solutions |
| 12/25/1979 | US4180547 Process for recovery of chemicals from saline water |
| 12/18/1979 | US4179493 Dehydration process |
| 11/27/1979 | US4176163 Sodium oxide fume for sulfur oxide removal |
| 11/14/1979 | EP0005270A1 Separation of sulfur dioxide from waste waters and on occasion from waste gases |
| 11/13/1979 | US4174382 Process for the production of coarse K2 SO4 in crystallizers and classifiers |
| 11/13/1979 | CA1066222A1 Electrolytic cell including buffer, sulphate, acid, and chlorine dioxide compartments |
| 11/06/1979 | US4173624 Recovery of sodium sulphate in production of iron oxide black pigments |