Gas separation by semi-permeable membranes
US4941893A · kind A · utility
38Cited by
13References
74Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2203/0465
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is disclosed for separating gaseous silicon compounds from hydrogen and/or hydracids. Specifically, the method comprises the utilization of semi-permeable membranes for such gaseous separation. Particularly preferred is a composite membrane comprised of a coating separation layer of sulfonated polysulfone and a support layer of polysulfone. Mixtures of hydrogen and silane are particularly suitable for being separated by means of composite membrane separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.