Mineral treatment
US4159308A · kind A · utility
6Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The addition of a normally insoluble fluoride to a reaction being a chemical treatment process provides a surprisingly improved rate is dissolution in many cases. Specifically, where the fluoride is added to a reaction using hydrochloric acid or ferric chloride, the yield is more rapid than has previously been shown in the art. The invention is most applicable where the stability constant of the fluoride or fluoride complex of the element to be recovered is higher than that of the cation with which the fluoride is originally associated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.