Process for manufacturing a partially permeable membrane
US4722771A · kind A · utility
5Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Nov 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for manufacturing a partially permeable membrane is such that a 20-200 .mu.m thick aluminum foil in the non-recrystallized condition is etched in an electrolyte at a current density in the range 2-20 kA/m.sup.2 and the surface given an after-treatment to prevent hydration reactions. The membrane is particularly suitable for ultrafiltration, gas separation or pervaporation and to that end can also be employed in combination with a polymer membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.