Hollow fiber contained liquid membrane pervaporation for removal of volatile organic compounds from aqueous solutions
US5637224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1994 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Sep 14, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vaporizable solute transfer system for transferring a vaporizable solute from an aqueous feed solution to an extractant liquid comprises a fluid tight housing, a porous membrane which divides the housing into a feed solution chamber and an extractant chamber, and a vacuum atmosphere chamber formed of a nonporous material. The housing has feed solution inlet and outlet ports which communicate with the feed solution chamber, an extraction inlet port which communicates with the extractant chamber, and a vacuum outlet port which communicates with the vacuum atmosphere chamber. The vaporizable solute transfer system also includes a pressure difference control means for maintaining a difference between a liquid pressure of a feed solution chamber and a liquid pressure of an extractant liquid in the extractant chamber substantially within a predetermined pressure range so that an interface between the feed solution and the extractant is substantially immobilized at the membrane. The vaporizable solute transfer system is particularly adapted for transferring vaporizable solute from a feed solution to an extractant, which feed solution and extractant may be immiscible with one another whe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.