Flexible microporous cellulosic membranes and methods of formation and use thereof
US4220477A · kind A · utility
4Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Oct 23, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/147
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Microfiltration membranes are described comprising 10% to 50% cyanoethylated polysaccharide ether polymers blended with 50% to 90% polymers of cellulose nitrate, cellulose acetate or mixtures of the two. These membranes are flexible and strong and can be readily pleated for use in cartridge filters as well as used flat in conventional single- or multi-plate holders. They are also more thermally stable than conventional "mixed ester" (cellulose nitrate/cellulose acetate) membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.