Use of barium and/or strontium sulphide to remove heavy metals in acidic solutions
US5795486A · kind A · utility
2Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/914
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to the use of barium sulphide or strontium sulphide for the removal of heavy metals in industrial acidic solutions. The invention is applicable to the purification of contaminated acids, in particular of spent battery acid, or of industrial solutions of titanyl sulphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.