Hollow fiber membranes
US5181940A · kind A · utility
34Cited by
6References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Aug 1, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing highly asymmetric hollow fibers useful as permselective gas separation membranes and for producing composite membranes thereof by extruding the spinning dope through a tube-in-orifice spinneret into a gas-filled chamber maintained at reduced pressure and then conveying the extruded hollow fiber through a liquid bath to solidify the extrudate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.