Method for recovering silver from refractory manganese ores
US5055130A · kind A · utility
4Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/838
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for recovering silver from a refractory manganese dioxide-silver ore. The ore is contacted with an effective amount of a culture of direct manganese-reducing Bacillus polymyxa bacteria. The ore-bacteria mixture is maintained at an approximately neutral pH until a sufficient amount of the manganese dioxide in the ore is reduced from Mn(IV) to Mn(II). The silver present in the ore is then recovered by conventional methods such as cyanide leaching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.