Method of producing very pure magnesium oxide
US4508690A · kind A · utility
6Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Aug 29, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Very pure magnesium oxide is obtained from ore containing magnesium, more particularly ore containing magnesium carbonate, by calcining the ore and leaching the resulting magnesium oxide with carbon dioxide and calcium chloride solution to produce magnesium chloride solution. Carbon dioxide and ammonia are added, so as to precipitate magnesium carbonate trihydrate, which is decomposed to magnesium oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.