Method of wet-cleaning gases containing sulfur dioxide, halogens and arsenic from pyrometallurgical treatment of sulphidic materials
US4138231A · kind A · utility
15Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Mar 30, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/507
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention comprises a method of wet-cleaning gases containing sulfur dioxide, halogens together with arsenic and/or arsenic compounds obtained in a pyrometallurgical treatment of sulfidic materials. The gases are washed in a diluted sulfuric acid circulating in a closed circuit, from which arsenic is recovered. The gases are then cooled to water condensation whereby the halogens are substantially completely taken up in said condensate and separated. The separated condensate is then discharged to a recipient after precipitation of residual arsenic and neutralization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.