Multi-stage pervaporation process run at progressively higher vacuum, higher temperature or both at each successive retentate stage
US4962270A · kind A · utility
26Cited by
11References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 27, 1989 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Feb 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/3621
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved separation of feed streams containing multiple components is effected by means of a multi membrane staged pervaporation process wherein each membrane stage is series is run as progressively higher temperature, stronger vacuum or both than the preceding stage. This process is especially useful for separating components from wide boiling range mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.