Patent · US Expired

Process for improving membranes

US7677398B2 · kind B2 · utility

20Cited by

7References

14Claims

0Family size

Assignee

BEN GURION UNIVERSITY OF THE NEGEV RESEARCH AND DEVELOPMENT AUTHORITY · IL

Inventors

Sophia Belfer · Beer Sheva, IL
Rosalia Fainstein · Beer Sheva, IL
Luba Kesselman · Beer Sheva, IL
Charles Linder · Rehovot, IL

Key dates

Filing date	Sep 4, 2005
Grant date	Mar 16, 2010
Priority date	—
Expiry date	Sep 4, 2025

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F1/441
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention provides a process for improving the antifouling properties and for increasing the selectivity of commercial composite polyamide nanofiltration (NF) and reverse osmosis (RO) membranes comprising circulating a low concentration of water soluble monomers and an initiating redox couple in an aqueous solvent, without transverse pressure over the surface of the membrane thereby effecting a free-radical graft polymerization on the surface of the membrane.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.