Method for bleaching oxygen delignified cellulose-containing...

Details Method for bleaching oxygen delignified cellulose-containing... Method for bleaching oxygen delignified cellulose-containing...

B - Operations, Transporting

27

K

8/82

B27K 5/02 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1119360

ABSTRACT OF THE DISCLOSURE In a method for bleaching oxygen delignified cellulose- containing pulp such as sulphate, sodium and sulphite pulps with ozone and peroxide, the ozone treatment takes place at two stages, the alkaline solution which is added subsequent to the ozone treatment includes peroxide and complex formers, and 55 to 85% of the total amount of chemicals is added at the first stage.

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