Membrane for the separation of carbon dioxide
US5445669A · kind A · utility
48Cited by
18References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 9, 1994 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Aug 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane for the separation of carbon dioxide is disclosed which includes a hydrogel film of a cross-linked, vinyl alcohol/acrylic acid salt copolymer impregnated with an aqueous carrier solution containing a carbon dioxide carrier dissolved therein. A composition containing a solvent, an alkali metal carbonate or bicarbonates, and a polydentate ligand capable of forming a complex with an alkali metal ion is suitably used as the carrier solution. This composition may also be used for the preparation of a liquid film of a carbon dioxide separation membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.