Acid tolerant polymeric membrane and process for the recovery of acid using polymeric membranes
US7997426B2 · kind B2 · utility
2Cited by
16References
14Claims
0Family size
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Key dates
| Filing date | Aug 7, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Apr 17, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A multi-layer membrane structure including a crosslinked polymeric membrane, such as a crosslinked polyvinyl sulfate membrane or a crosslinked copolymer polyvinyl sulfate and polyvinyl alcohol membrane, is provided. The membrane structure is suitable for use in an acid environment, and is suitable for recovering acid from a feed mixture comprising acid, hydrocarbons and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.