| Patents for C01D 5 - Sulfates or sulfites of sodium, potassium, or alkali metals in general (1,848) |
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| 10/31/1979 | EP0004883A2 Process for the preparation of free-flowing inorganic ammonium and alkali salts |
| 10/30/1979 | CA1065121A1 Process for making sodium metabisulfite |
| 10/09/1979 | CA1063773A1 Stabilised dithionites: vanillin |
| 09/18/1979 | US4168240 Process for the preparation of a chrome tanning agent and Glauber's salt |
| 09/05/1979 | EP0003824A2 Process for the preparation of iron oxide pigments and sodium sulphate |
| 08/14/1979 | US4164543 Process for regenerating brines containing sodium sulfites and sulfates |
| 08/14/1979 | CA1060181A1 Treating remains containing sodium choride and sodium sulphate |
| 08/07/1979 | CA1059947A1 Process for producing aqueous solutions of sodium, ammonium and magnesium sulphite |
| 05/01/1979 | US4152409 Method for carrying out air oxidation and for adding fine bubbles to a liquid |
| 04/18/1979 | EP0001533A2 Process for the purification of sodium sulphate containing traces of methionine |
| 03/20/1979 | US4145283 Wet oxidation |
| 03/13/1979 | US4144311 Melting, oxidation |
| 02/20/1979 | CA1048735A1 Method for transferring sulfuric acid or hydrogen sulphates in solution into usable products |
| 01/09/1979 | US4133866 Process for the selective separation of the bound sodium content of red mud |
| 12/26/1978 | US4131642 Sulfuric acid, esterification |
| 12/12/1978 | US4129642 Process for the production of potassium sulfate |
| 12/05/1978 | US4128397 Sulfur dioxide liberation compositions and methods of using same |
| 09/05/1978 | US4112061 Production of sodium sulfite utilizing mother liquor from the sodium metabisulfite process |
| 08/29/1978 | US4110154 Sodium bisulfite by cation exchanging calcium bisulfite |
| 08/01/1978 | US4104365 Adding alcohol or ketone |
| 07/18/1978 | US4101286 Bubble forming device having no moving parts |
| 07/11/1978 | US4100254 Industrial process of preparing magnesia of high purity |
| 06/06/1978 | US4093700 Dehydration, roasting, leaching |
| 05/09/1978 | US4088451 Concentration of underground brines in situ by solar evaporation |
| 02/07/1978 | US4072472 Solar evaporation |
| 12/20/1977 | US4064217 Process for recovering aluminum from alunite ore |
| 11/08/1977 | US4057512 Alkali metal catalyst recovery system |
| 08/30/1977 | US4045543 Production of potassium sulfate and hydrogen chloride |
| 07/12/1977 | US4035228 From pulping process |
| 06/21/1977 | US4031182 Recovery of aluminum from alunite ore using acid leach to purify the residue for bayer leach |
| 03/29/1977 | US4014981 Removal of sulfur from stack gases |
| 02/22/1977 | US4009088 Process for producing aqueous solutions of sodium, ammonium and magnesium sulphite |
| 02/01/1977 | US4005987 Iron sulfate |
| 01/18/1977 | US4003985 Production of sodium sulfite |
| 12/21/1976 | US3998935 From potassium chloride and potassium bisulfate |
| 12/21/1976 | US3998709 Treating remains containing sodium chloride and sodium sulphate |
| 12/07/1976 | US3996334 Roasting, leaching, ion exchanging, alkali metal aluminates |
| 12/07/1976 | US3996333 Method for dehydrating ores |
| 11/30/1976 | US3995015 Process for making sodium metabisulfite |
| 10/05/1976 | US3984521 Method of producing alumina and potassium sulphate from alunite |
| 09/28/1976 | US3983211 Method of producing alumina and potassium sulphate form alunite |
| 09/21/1976 | US3981964 Sodium sulphate compositions and their production |
| 07/27/1976 | US3971844 Method for removing sodium sulfate from aqueous solutions |
| 07/27/1976 | US3971734 Sulfite compositions, aqueous sulfite solutions and method of decreasing their rate of oxidation |
| 07/06/1976 | US3967930 Separation of complex potassium salts from brine evaporites |
| 06/29/1976 | US3966541 Concentration of underground brines in situ by solar evaporation |
| 04/27/1976 | US3953307 Vat dye reduction process for use in a dyeing plant for textile processing |
| 03/16/1976 | US3944650 Process for removing oxides of sulfur, dust and mist from combustion waste gas |