Method of treating process water

Details Method of treating process water Method of treating process water

D - Textiles, Paper

21

C

D21C 11/00 (2006.01) C02F 9/00 (2006.01) D21C 9/00 (2006.01) D21C 9/10 (2006.01) D21C 9/153 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2139566

Treatment of process water containing metal ions, in connection with the bleaching of pulp of lignocellulose-containing material. The process water is brought into contact with pulp at pH above 7 and a temperature of 50-120 °C. The process thereby is relieved entirely or partially from the metal ion content.

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