Method for preparing asymmetrical separation membrane for separating water/organic solvent or gas
US5868975A · kind A · utility
3Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provide a method for preparing asymmetric separation membrane having thin skin layer having reduced numbers of pin holes on the surface of the membrane for separating water/organic solvent or gas. Imide type asymmetric hollow fiber membrane according to the present invention has superior separation degree and permeability of water/organic solvent or gas over general imide type asymmetric hollow fiber membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.