Removal of mercury from sludge by heating and condensing
US4087276A · kind A · utility
20Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1977 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Jul 15, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2301/063
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method is disclosed for stripping mercury from mercury-containing sludges, the improvement consisting in that the sludges are first dried and then roasted, all these operations being carried out under a subatmospherical pressure, a final condensation of the vapor phases takes place under superatmospherical pressure. A high efficiency of recovery is thus warranted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.