Process for production of magnesium chloride
US5120514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Jun 7, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F5/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for production of magnesium chloride with sufficient purity for the production of magnesium metal, by leaching a magnesium containing raw material in hydrochloric acid. It is essential to keep the ratio between acid soluble iron and nickel greater than 120 and the ratio between acid soluble iron and phosphorus greater than 20 in the primary magnesium chloride solution, to obtain a sufficiently pure product. The acid soluble iron can partly or completely be substituted by an equal, molar amount of acid soluble aluminium. It is especially preferred to use mixtures of macro- and crypto-crystalline magnesites in the ratio 1:10-10:1 as raw material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.