Controlled carbo-chlorination of kaolinitic ores
US4083927A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Nov 2, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A novel improvement in the process for the carbochlorination of kaolinitic ores is provided wherein the improvement comprises adding catalytic amounts of boron chloride to the carbo-chlorination step which results in the catalyzed and controlled chlorination of alumina and silica. Preferably, about 0.3 to 5.0 percent of boron chloride per volume of chlorine is added to the chlorination step and in combination with from 5 to 40 percent or more of reductant carbon to provide a conjoint action wherein preferential chlorination of alumina over silica is obtained at low levels of boron chloride and reductant and total chlorination of both alumina and silica are obtained at high boron chloride and reductant levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.