Flocculant for sludges

Details Flocculant for sludges Flocculant for sludges

1982-07-12

1984-04-24

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

525383, C02F 1114, C02F 156

Patent

active

044446675

ABSTRACT:
Sludges are flocculated by the addition of a polymer which is prepared by the homopolymerization of N-vinylformamide in the presence of a free-radical polymerization initiator to give a poly-N-vinylformamide, followed by hydrolysis of from 10 to 90% of the formyl groups in the poly-N-vinylformamide.

REFERENCES:
patent: 3424791 (1969-01-01), Kurtz et al.
patent: 3715336 (1973-02-01), Nowak et al.
patent: 4217214 (1980-08-01), Dubin
Chemical Abstracts, "Polymerization of N-methyl-N-vinylformamide and Preparation of quaternized poly (vinylamine) from the polymer," 84: 5731h, Jan. 1976.

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