Treatment of lead sulphide bearing material
US3933973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Oct 16, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for leaching finely divided lead sulphide bearing material to convert contained lead values to soluble lead acetate with concurrent conversion of sulphur values associated with the lead sulphide to an elemental state. The method involves forming a slurry consisting of the material dispersed in an aqueous medium containing free acetate ions and having a pH below 5.1. The slurry is reacted at a temperature of 60.degree. to 120.degree.C. with a free oxygen-bearing gas under a partial pressure of oxygen of 20 to 60 p.s.i. in order to convert lead sulphide to soluble lead acetate with concurrent production of insoluble elemental sulphur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.