BLEACHING OF LIGNOCELLULOSIC PULP WITH OZONE AND PERACID

摘要

The present invention relates to a method of bleaching lignocellulosic fiber material in a combination step with ozone and peracid, such as peracetic acid, ZHCPaaMC. The invention preferably relates to the bleaching of sulphate pulp. The pulp is ozone treated in a HC step in an ozone reactor, whereafter the pulp is diluted with water or white water, and peracid is added prior to an MC bleaching tower with subsequent washing.