Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis
US5651807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1995 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Oct 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to method for treatment of residues originating from organochlorosilanes- and/or chlorosilane syntheses. The residues are, optionally together with an oxidation agent, supplied to a smelting furnace where the residues are melted in order to form a molten metallic phase comprising at least of silicon and copper and a slag phase, tapping of the metallic melt and an inert slag from the smelting furnace. Copper is dissolved from the solidified silicon-copper containing metallic phase by leaching with a mineral acid in order to produce a solid product substantially containing silicon, whereafter copper is recovered from the leach solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.