Permselective composite membrane having improved gas permeability and selectivity
US5176724A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Aug 26, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/122
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A permselective composite membrane comprising a porous support of a polysulfone or a polyether sulfone in combination with an ultrathin film of a defined polyacetylene whereby an interfacial layer is formed between the support and ultrathin film by the combination of the polysulfone or polyether sulfone and the polyacetylene and facilitates a gas permeability and a separation ratio of an intended gas and a useless gas. The ultrathin film may be covered with another ultrathin film of a different polymer. The interfacial layer made of phthalocyanine or its coordination compound may be provided between the support and the first-mentioned ultrathin film. In this case, various materials for the support and the first-mentioned ultrathin film may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.