Production of potassium sulfate and hydrogen chloride
US4045543A · kind A · utility
21Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Nov 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D5/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Potassium sulfate (K.sub.2 SO.sub.4) is prepared by reaction of potassium chloride and sulfuric acid in an aqueous medium by initially removing evolved HCl in the gaseous form at temperatures of about 65.degree.-120.degree. C., then removing the remaining HCl as an HCl/water azeotrope at temperatures of about 90.degree. to 110.degree. C., restoring to the reaction mixture the amount of water removed with the azeotrope, and permitting the potassium sulfate to crystallize from the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.