Method of producing high permeable composite reverse osmosis membrane
US5576057A · kind A · utility
62Cited by
4References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1251
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of producing a high permeable composite reverse osmosis membrane which comprises forming a polyamide type skin layer on a porous support by the process comprising a step of coating a solution A containing a compound having at least two reactive amino groups on the porous support and a step of contacting a solution B containing a polyfunctional acid halide with the coated layer of the solution A, wherein the difference between a solubility parameter of the solution A and a solubility parameter of the solution B is from 7 to 15 (cal/cm.sup.3).sup.1/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.