Aromatic polymide separation membrane
US5112941A · kind A · utility
32Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Jun 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/129
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An aromatic polyimide separation membrane prepared by subjecting an aromatic polyimide membrane to fluorine treatment with an active fluorine is described. The aromatic polyimide separation membrane according to the present invention has an extremely high selectivity and gas permeability, and therefore, is useful as a membrane for separation of gas mixtures or liquid mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.