Multiple stage semi-permeable membrane process and apparatus for gas separation
US5482539A · kind A · utility
34Cited by
15References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Oct 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/226
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane process and apparatus are described for the production of a desired very high purity permeate gas by use of a multiple stage membrane process wherein in a primary stage a process feed gas mixture is provided to a primary membrane separator unit comprising a membrane having a relatively high intrinsic permeability to provide an intermediate permeate gas and a retentate gas, and providing the intermediate permeate gas in a secondary stage to a secondary membrane separator unit comprising a membrane having a relatively low intrinsic permeability, to produce therefrom a very high purity permeate gas product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.