Method for purifying process water or wastewater containing...

Details Method for purifying process water or wastewater containing... Method for purifying process water or wastewater containing...

C - Chemistry, Metallurgy

02

F

C02F 1/56 (2006.01) C02F 1/52 (2006.01) C02F 1/54 (2006.01) C02F 9/00 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2095180

ABSTRACT Wood-resin-containing process water or wastewater from the pulp industry is purified by adding, as floccu- lants, a high-molecular-weight polyethylene oxide and a water-soluble, non-ionic cellulose ether, suitably having a flocculation temperature of The added amount per litre of water is preferably 2-20 mg of the high-mole- cular-weight polyethylene oxide and preferably 5-30 mg of the non-ionic cellulose ether.

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