Membrane for a filtration, gas or liquid separation or pervaporation apparatus and a manufacturing method for such membrane
US5066398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1991 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Jan 25, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/72
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane for a filtration, gas or liquid separation or pervaporation apparatus comprising at least one porous layer of an inorganic material selected from sintered ceramic, sintered metal, sintered glass or carbon and a separating layer of organic material, the membrane being characterized in that said organic material is a polyphosphazene, in that the average diameter of the pores in said porous layer of inorganic material is between about 5 nm and 1 .mu.m, and in that said separating layer is continuous and only penetrates into said porous layer to a depth of less than five times the diameter of said pores in said porous inorganic layer, said layers being strongly bonded to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.