Use of cationic charge modified filter media

Details Use of cationic charge modified filter media Use of cationic charge modified filter media

1990-11-27

1992-02-04

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

B01D 1500

Patent

active

050857800

ABSTRACT:
A process for removing anionic contaminants from an aqueous fluid having a pH up to about 12, the fluid being passed through a filter media whereby the contaminants are electrokinetically captured and adsorbed onto the media, such a media comprising cellulose fiber and silica based particulate or fiber filter elements and a charge modifying amount of a cationic charge modifying system bonded to the surfaces thereof. One component of the charge modifying system is a primary charge modifying agent characterized as a water soluble organic polymer capable of being adsorbed into the filter elements and having a molecular weight greater than about 1000. Each monomer of the polymer can have at least one epoxide group capable of bonding to the surface of the filter elements and at least one quaternary ammonium group. A portion of the epoxy groups on the organic polymer are bonded to the secondary charge modifying agent.

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