Method for the continuous chemical reduction and removal of mineral matter contained in carbon structures
US4780112A · kind A · utility
11Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Dec 10, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/215
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for treating carbon to reduce the ash content therein. The process involves treating the carbon with a fluorine acid solution which consists of an aqueous solution of hydrofluorosilicic acid and hydrogen fluoride, such that the available metal oxides are converted to metal fluorides and/or metal fluorosilicates and separating the treated carbon from the metal fluorides and/or metal fluorosilicates produced by the treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.