Use of grafted cellulose for purifying water

Details Use of grafted cellulose for purifying water Use of grafted cellulose for purifying water

1991-01-14

1992-10-06

Spear, Frank

Liquid purification or separation

Processes

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

210683, 21050029, 21050035, C02F 142

Patent

active

051528967

ABSTRACT:
The invention relates to the use of grafted celluloses, in fibrous form, particularly paper, non-woven web, flock, yarn, woven fabric, comprising quaternary ammonium functions, for eliminating humic substances and nitrates contained in natural water or industrial sewage.
The grafted cellulose is for example obtained by radical grafting with the aid of a non-saturated monomer with quaternary ammonium function, particularly quaternized diethyl-amino-ethyl methacrylate.
Its capacity is greater than or equal to 0.2 meq/g.

REFERENCES:
patent: 3083118 (1963-03-01), Bridgeford
patent: 3723306 (1973-03-01), Bridgeford
patent: 4382864 (1983-05-01), Hashimoto et al.
patent: 4661257 (1987-04-01), Kreevoy et al.

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