Process for production of potassium sulfate and hydrochloric acid
US4268492A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Aug 6, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D5/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Alkali metal fluosilicate is used as an intermediate reactant in a process for the production of hydrochloric acid and an alkali metal sulfate from sulfuric acid and an alkali metal chloride. The process includes the reaction of alkali metal fluosilicate with sulfuric acid to produce alkali metal sulfate and H.sub.2 SiF.sub.6, the latter being reacted with alkali metal chloride to produce HCl and alkali metal fluosilicate. The resulting hydrochloric acid may be converted to anhydrous hydrogen chloride. A continuous process for the production of hydrochloric acid and of alkali metal sulfate such as potassium sulfate from an alkali metal fluosilicate material is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.