Branched/cross-linked cationic phenol-formaldehyde polymers usef

Details Branched/cross-linked cationic phenol-formaldehyde polymers usef Branched/cross-linked cationic phenol-formaldehyde polymers usef

1980-07-14

1981-12-29

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210708, 210735, 260 293, C02F 156

Patent

active

043081495

ABSTRACT:
Oily waste emulsions which cause low turbidity in industrial waste water effluents are successfully treated with cross-linked cationic polymeric compounds synthesized by reacting phenol, substituted phenol, formaldehyde and various low molecular weight polyamines having a preferred molecular weight of at least 1500 and not exceeding a molecular weight of about 30,000. The polyamines are derived from a base catalyzed polymerization of ammonia and ethylene dichloride or by the oligomerization of ethyleneimine.

REFERENCES:
patent: 3290310 (1966-12-01), Morf et al.
patent: 3372129 (1968-03-01), Phillips
patent: 3377274 (1968-04-01), Burke et al.
patent: 3634230 (1972-01-01), Odom et al.
patent: 3878136 (1975-04-01), Hofel et al.
patent: 4155847 (1979-05-01), Tanaka et al.
patent: 4225479 (1980-09-01), Hicks

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