Use of grafted cellulose for purifying water
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United States of America Patent
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Oct 6, 1992
Grant Date -
N/A
app pub date -
Jan 14, 1991
filing date -
Jan 15, 1990
priority date (Note) -
Expired
status (Latency Note)
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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.
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