Fluorinated polymeric membranes for gas separation processes
US4657564A · kind A · utility
29Cited by
11References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Dec 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31649
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a treated, semi-permeable, polymeric membrane having improved selectivity for separating components of a gas mixture. The membrane is provided by fluorinating a polymer cast into membrane form, having the general structural formula: ##STR1## wherein R.sub.1 is a linear or branched C.sub.1 -C.sub.4 alkyl group; R.sub.2 and R.sub.3 are independently linear or branched C.sub.1 -C.sub.6 alkyl groups; R.sub.4 is a linear or branched C.sub.1 -C.sub.12 alkyl or aryl group; X is a C.sub.1 -C.sub.3 alkyl group or ##STR2## m is at least 100; and n is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.