Reverse osmosis separation process using porous asymmetric acetyl cellulose membrane
US4247401A · kind A · utility
15Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1978 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Aug 31, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the separation of organic or metallo-organic substances from salts by reverse osmosis is provided. The membranes used are asymmetric acetyl cellulose membranes modified by covalently bonded residues of reactive dyestuffs containing ionizable groups. The diameter of the pores on the surface of the membrane is 5 to 100 A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.