Method of cleaning fouled or scaled membranes

Details Method of cleaning fouled or scaled membranes Method of cleaning fouled or scaled membranes

2007-01-16

2010-02-16

Drodge, Joseph W (Department: 1797)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C134S022190, C210S639000, C210S652000, C210S698000, C210S701000, C210S732000, C210S733000, C210S774000

Reexamination Certificate

active

07662289

ABSTRACT:
A method of cleaning a fouled or a scaled RO or NF membrane surface with a solution containing one or more thermo-responsive polymers is disclosed. More specifically, the method comprises: treating the membrane surface in a membrane separation system with a solution containing one or more TRP, wherein said TRP is soluble in said solution and at least an effective amount of said TRP diffuses into a foulant layer on said membrane surface; making insoluble said TRP diffused into said foulant layer; optionally, rinsing the membrane.

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Bunseki Kagaku Abstracts, vol. 52, No. 4, Apr. 2003, Tohru Saitoh, Chiyo Matsubara and Masataka Hiraide, The Japan Society for Analytical Chemistry, pp. 1 and 7.

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