METHOD FOR REDUCING THE EXTRACTIVES CONTENT OF HIGH-YIELD PULPS AND METHOD FOR PRODUCING BLEACHED HIGH-YIELD PULPS

摘要

The invention relates to a method for reducing the content of extractives of ahigh-yield pulp in a peroxide bleaching stage, said stage including peroxidebleaching and a subsequent dewatering or washing, said method comprisingcontacting the pulp in the peroxide bleaching with an organic stabilizer andin or after the peroxide bleaching with a surfactant, and thereaftersubjecting the bleached pulp to said dewatering or washing for removingextractives along with the aqueous phase. The invention also relates to amethod for producing bleached high-yield pulp.