Chemical treatment of sand
US4542003A · kind A · utility
4Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Jun 27, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C1/022
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for treating sand which includes one or more stages in which sand is mixed with a dilute aqueous solution of hydrofluoric or sulphuric acid together with zinc or sodium hydrosulphite and the resulting slurry is agitated at ambient temperature in an atmospheric oxygen-free environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.