Method of purifying brine used in electrolysis by the amalgam process
US4132759A · kind A · utility
5Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1978 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Feb 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/61
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the process for the production of chlorine and alkali metal hydroxide by electrolysis according to the amalgam process using calcium- and/or sulphate containing crude salt, the calcium and/or sulphate contents introduced into the brine circuit by the crude salt are removed from the brine by precipitation of the double salt Na.sub.2 SO.sub.4 . CaSO.sub.4. Small particles of glauberite may be introduced to the brine to initiate and accellerate precipitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.