Method of treating pulp bleaching effluents

Details Method of treating pulp bleaching effluents Method of treating pulp bleaching effluents

C - Chemistry, Metallurgy

02

F

35/20, 362/59, 8

C02F 9/00 (2006.01) B01D 61/14 (2006.01) C02F 1/44 (2006.01) D21C 9/10 (2006.01) D21C 11/00 (2006.01)

Patent

CA 1130023

APPLICANT: EKA AKTIEBOLAG TITLE: METHOD OF TREATING PULP BLEACHING EFFLUENTS ABSTRACT OF THE DISCLOSURE A method for cleaning effluents from bleaching plants which use ultrafiltration for cleaning, preferably after the first extraction stage, by dividing the ultrafiltration into two stages, and between them inserting an alkali treatment stage. The high molecular chlorine compounds are thereby split into innocuous sodium chloride in the permeate from the second ultrafiltration stage, which can be returned to the extraction stage so that with the alkai excess after the splitting, it can cover all or part of its alkali requirement.

336447

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