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US 4,740,308 AGranted
Membrane cleaning process
AssigneeChampion International Corporation
InventorsHenry A. Fremont, Richard C. Agar, James W. Bray, Gregory W. Marquart
Life of this patent
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Abstract
A process for cleaning fouled separation membranes such as ultrafiltration, reverse osmosis, and microfiltration membranes is provided comprising: removing a separation membrane having a fouled surface from operation; effecting reaction on the fouled surface of said membrane of an inorganic peroxide and an alkali metal or alkaline earth metal hypohalite; and thereafter, substantially removing the foulant and the reaction products thereof from the membrane surface.
Claims15
Process for cleaning fouled separation membranes comprising:
- removing a separation membrane having a fouled surface from operation;
- generating singlet oxygen in situ by effecting reaction on the fouled surface of said membrane of an inorganic peroxide and an alkali metal or alkaline earth metal hypohalite of the formula MOX wherein M is an alkali metal or alkaline earth metal and X is a halide;
- and thereafter,
- substantially removing the foulant and the reaction products thereof from the membrane surface.
1 more element
Dependencies are inferred from the claim text.