Chlorination of ores with catalyzed metal chlorides
US4220629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Aug 14, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G49/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention comprises a process for the manufacture of metal chlorides by the double-decomposition reaction between a metal chlorinating agent and a metal oxide having greater affinity for chlorine than does the oxide of the metal chloride, and in the presence of small amounts of boron chloride or functionally equivalent boron compounds that increase the rate and degree of completion of the reaction. A major application of this invention is for the making by the chlorination of clay of aluminum chloride and alumina intermediates for the manufacture of aluminum metal. SiCl.sub.4 is formed in the carbo-chlorination of clay or other aluminous-siliceous ores. The SiCl.sub.4 by this invention is catalyzed with BCl.sub.3 and reacted with calcined clay to produce AlCl.sub.3 and SiO.sub.2. The practical use of SiCl.sub.4 to make AlCl.sub.3 thus eliminates the previous costly burden of waste SiCl.sub.4 production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.