Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
US7041152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2005 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Mar 29, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates generally to a process for the production of sulfuric acid and liberation of precious metal values from materials containing sulfur through pressure leaching operations. In accordance with various aspects of the present invention, the sulfur-bearing materials may comprise residues from pressure leaching operations, such as those carried out at medium temperatures. The process of the present invention can be advantageously used to convert such sulfur-bearing materials to sulfuric acid by means of pressure leaching. The sulfuric acid so produced can be used beneficially in other mineral processing operations, for example those at the site where it is produced. Metals, such as precious metals, that are contained within the sulfur-bearing materials advantageously may be recovered from processing products by established precious metals recovery technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.