Filled superglassy membrane
US6316684A · kind A · utility
16Cited by
7References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Sep 1, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/144
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane and membrane separation process useful in gas, vapor and liquid separations. The membrane comprises a separating layer of a polymer that is characterized by a high glass transition temperature, T.sub.g, such as at least about 100.degree. C., and a high free volume within the polymer material itself, such as a fractional free volume of at least about 0.20. Within the polymer material are dispersed fine non-porous particles, such as silica or carbon black particles, having an average diameter no greater than about 1,000 .ANG.. The membrane is particularly useful for separating C.sub.3+ hydrocarbons from other gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.