Reactive distillation of chlorosilanes
US7479567B2 · kind B2 · utility
1Cited by
7References
17Claims
0Family size
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Key dates
| Filing date | Mar 15, 2006 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Apr 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Chlorosilanes such as dimethyldichlorosilane are hydrolyzed in a first super-azeotropic hydrochloric acid distillation column A to produce cyclosiloxanes, chlorosiloxanes, and hydrogen chloride gas. The cyclosiloxanes and the chlorosiloxanes are washed and separated according to their volatility in a second sub-azeotropic hydrochloric acid distillation column B, to produce a substantially chloride free volatile cyclosiloxane stream and a substantially chloride free non-volatile siloxane stream. The process is substantially chloride efficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.