Membrane and process for the recovery of acid
US7976710B2 · kind B2 · utility
4Cited by
17References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 7, 2006 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | May 12, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cross-linked polyvinyl sulfate, copolymer of polyvinyl sulfate and polyvinyl alcohol, or Nafion® membrane is used for recovering sulfuric acid from a feed mixture comprising predominantly acid and water under reverse osmosis conditions wherein sulfuric acid is enriched in the retentate stream and water is removed in the permeate stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.