Composition membrane for separating water from fluids containing organic components by means of pervaporation
US5334314A · kind A · utility
27Cited by
4References
26Claims
0Family size
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Key dates
| Filing date | Oct 1, 1991 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Composite membrane-for separating water from fluid mixtures containing organic components by means of pervaporation comprising a separating layer of cross-linked polyvinyl alcohol, which has been subjected to a post-cross-linking by treatment with acids acting in the vapor phase on the polyvinyl alcohol layer. The acids are preferably hydrohalic acids, sulfurous acid, sulfuric acid, nitrous acid, nitric acid or acetic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.