Process for removing mercury from brine sludges
US4124459A · kind A · utility
10Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1977 |
| Grant date | Nov 7, 1978 |
| Priority date | — |
| Expiry date | Jul 21, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The mercury content of electrolysis cell brine sludge is reduced by sequentially: (1) acidifying the sludge to a pH below 2.5 and (2) leaching the sludge with aqueous hypochlorite solvent. The mercury content removed from the sludge may optionally be isolated from the solvent and reused as mercury cathode for brine electrolysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.