Improved monopersulfate treatment of membranes

Details Improved monopersulfate treatment of membranes Improved monopersulfate treatment of membranes

B - Operations, Transporting

01

D

B01D 65/02 (2006.01) B01D 61/22 (2006.01) B01D 65/08 (2006.01)

Patent

CA 2657687

A method of improving the water permeability and/or cleaning a porous polymeric membrane (such as a microfiltration or ultrafiltration membrane comprising the step of contacting said a porous polymeric membrane with a source of monopersulfate and a halide ion, such as chloride and optionally a base. The source of monopersulfate may be potassium monopersulfate in conjunction with potassium hydrogen sulfate and potassium sulfate, ie a triple salt of formula 2KHSO5.KHSO4.K2SO4.

L'invention concerne un procédé d'amélioration de la perméabilité à l'eau et/ou de nettoyage d'une membrane polymère poreuse (telle qu'une membrane de microfiltration ou d'ultrafiltration) comprenant l'étape consistant à mettre en contact la membrane polymère poreuse précitée avec une source de monopersulfate et un ion halogénure, tel un chlorure, et facultativement une base. La source du monopersulfate peut être du monopersulfate de potassium conjointement avec du sulfate dipotassique et du sulfate de potassium, c'est-à-dire un sel triple représenté par la formule 2KHSO5.KHSO4.K2SO4.

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