Patent · US Active

Monopersulfate treatment of membranes

US7988891B2 · kind B2 · utility

1Cited by

270References

26Claims

0Family size

Assignee

Siemens Industry, Inc. · US

Inventors

Heinz-Joachim Muller · Burgkirchen an der Alz, DE
Dongliang Wang · Beijing, CN
Nina Elbaz · Forbes, AU

Key dates

Filing date	Jul 14, 2006
Grant date	Aug 2, 2011
Priority date	—
Expiry date	May 19, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2321/168
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method of improving the water permeability and/or cleaning a porous polymeric microfiltration or ultrafiltration membrane, preferably a hydrophobic/hydrophilic blended membrane, eg P VdF/PVP comprising the step of contacting the porous polymeric membrane with a source of monopersulfate, preferably an aqueous solution of 2KHSO5.KHSO4.K2SO4.

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