Ultrafiltration, hyperfiltration or demineralization element, its production process and its use for the treatment of liquid radioactive effluents
US4925566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/108
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrafiltration, hyperfiltration or demineralization element comprises a porous inorganic material support and an asymmetrical, cellular, microporous organic polymer membrane, produced on one of the faces of the porous support and fitted into the pores of the porous support flush with said surface and without projecting beyond the same. The element is prepared by coating the inner surface of a tubular porous support with a coating solution of the organic polymer and then subjecting the coated support to a polymer insolubilization stage, which can be carried out by partial evaporation, followed by the immersion of the coated support in a coagulating bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.