Nitrogen-containing water-soluble polymer flocculants

Details Nitrogen-containing water-soluble polymer flocculants Nitrogen-containing water-soluble polymer flocculants

1985-11-13

1987-03-03

Nielsen, Earl

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

524800, 524922, 528405, B01D 2101, C02F 156, C08G 7306

Patent

active

046473793

ABSTRACT:
A nitrogen-containing prepolymer is prepared by adding an epihalohydrin, particularly epichlorohydrin, to piperazine in an amount of more than one mole of epihalohydrin per mole of piperazine, in the substantial absence of strong base.
The prepolymer is reacted with polyalkylene polyamines in the absence of strong base to produce a polymeric flocculant.

REFERENCES:
patent: 3391090 (1968-07-01), Schiegg
patent: 3523892 (1970-08-01), Schiegg
patent: 3917817 (1975-11-01), Vanlerberghe et al.
patent: 3953330 (1976-04-01), Tonkyn et al.
patent: 4129528 (1978-12-01), Petrovich et al.
patent: 4328142 (1982-05-01), Hertel et al.
patent: 4482667 (1984-11-01), Willis et al.

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