Method for producing potassium sulfate from potassium chloride and sulfuric acid
US10773968B2 · kind B2 · utility
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26Claims
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Key dates
| Filing date | Sep 6, 2017 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Sep 6, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/0718
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided for producing potassium sulfate from potassium chloride and sulfuric acid. The process entails mixing potassium chloride with the water to form a potassium chloride slurry which is mixed with recycled sulfuric acid to form a K+, Ct′, SO42″ acid mixture. This mixture is subjected to a crystallization process that produces potassium sulfate crystals and a hydrochloric acid-water vapor. The hydrochloric acid is separated from the hydrochloric acid-water vapor to form a hydrochloric acid solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.