Treating pulp-and-paper mill streams

Details Treating pulp-and-paper mill streams Treating pulp-and-paper mill streams

1979-04-23

1980-05-06

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 52, 162 29, C02B 120, D21F 182

Patent

active

042016665

ABSTRACT:
Aqueous pulp-and-paper mill waste streams are treated with a waste stream derived from the nitric acid etching of aluminum foil for electrolytic capacitors. This waste stream consists essentially of aqueous acidic aluminum nitrate, and a polyelectrolyte is added to it to synergistically improve flocculation, settling, and dosage rates.

REFERENCES:
patent: 2741051 (1956-04-01), Reissig
patent: 3627679 (1971-12-01), Fuller
patent: 3960648 (1976-06-01), Nakajima et al.
patent: 4008161 (1977-02-01), Wong et al.
patent: 4136026 (1979-01-01), Meyer et al.
patent: 4155845 (1979-05-01), Ancelle et al.
Chemical Abstracts, vol. 85, 1976, p. 428, No. 130152s, Hirota et al., "Aluminum Compounds (as Coagulants)".
Chemical Abstracts, vol. 87, 1977, p. 331, No. 58171u, Tanaka, "Treatment of Waste Water from Pulp Plant".
Chemical Abstracts, vol. 86, 1977, p. 343, No. 145264z, Berov et al., "Use of Polyelectrolytes Based on Diethylaminoethyl Methacrylate for Purifying Waste Waters ".

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