Gas separation membrane and method for its use
US6464755B2 · kind B2 · utility
54Cited by
21References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/643
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An asymmetric membrane is formed using a mixture of two or more different polymers including at least one type of polyimide. It is thereby possible to produce a gas separation membrane with low permeation resistance (a high permeation rate) for permeate gases passing through the porous layer of the membrane, which also maintains a practical level of mechanical strength of the membrane and has excellent water resistance and hot water resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.