Anionic flocculant for dewatering steel mill sludges

Details Anionic flocculant for dewatering steel mill sludges Anionic flocculant for dewatering steel mill sludges

1986-07-11

1987-07-28

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

524922, C02F 156

Patent

active

046830669

ABSTRACT:
A method of dewatering BOF scrubbing liquid sludges which contain large amounts of finely divided iron oxides which comprises treating these sludges with a dewatering amount of an acrylamide acrylic acid, N-substituted lower alkyl acrylamide sulfonate terpolymer which contains from 35-80 mole percent of acrylamide, from 10-60 mole percent of acrylic acid and from 1-30 mole percent of the N-substituted lower alkyl acrylamide sulfonate which terpolymer has a reduced specific viscosity (RSV) of at least 25.

REFERENCES:
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patent: 3692673 (1972-09-01), Hoke
patent: 4147681 (1979-04-01), Lim et al.
patent: 4342653 (1982-08-01), Halverson
patent: 4545902 (1985-10-01), Connelly et al.
patent: 4555346 (1985-11-01), Rosen et al.
patent: 4569768 (1986-02-01), McKinley
patent: 4599390 (1986-07-01), Fan et al.
The Condensed Chemical Dictionary, 8th edition, Von Nostrand Reinhold Company, 1971, p. 848.

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