Sulfate removal from alkali metal chlorate solutions
US4636376A · kind A · utility
12Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B11/145
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the removal of essentially chromium-free sulfate from a chromate and sulfate-containing chlorate liquor which includes mixing the chlorate liquor having a pH of between about 2.0 and 6.0 with a calcium-containing material at a temperature and for a time sufficient to form a sulfate-containing precipitate predominantly of glauberite, Na.sub.2 Ca(SO.sub.4).sub.2, and separating the substantially chromium-free glauberite from the chlorate liquor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.