Process for removing mercury from soil
US5785935A · kind A · utility
16Cited by
58References
9Claims
0Family size
Inventors
Key dates
| Filing date | Jul 11, 1994 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Heavy metals are efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution comprised of an aqueous solution of an acid and a salt. Heavy metals are also efficiently removed from paint chips by washing with an aqueous acid. The heavy metals are recovered from the leachant be cementation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.