Gas separation by composite solvent-swollen membranes
US4824443A · kind A · utility
22Cited by
23References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 7, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is disclosed a composite immobulized liquid membrane of a solvent-swollen polymer and a microporous organic or inorganic support, the solvent being at least one highly polar solvent containing at least one nitrogen, oxygen, phosphorous or sulfur atom, and having a boiling point of at least 100.degree. C. and a specified solubility parameter. The solvent or solvent mixture is homogeneously distributed through the solvent-swollen polymer from 20% to 95% by weight. The membrane is suitable for acid gas scrubbing and oxygen/nitrogen separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.