PULP BLEACHING; CHEMICAL PULP BLEACHED USING CHLORINE DIOXIDE, HYDROGEN PEROXIDE AND CHELATING AGENT

摘要

Methods for bleaching chemical pulps are disclosed including a final bleaching sequence of bleaching with chlorine dioxide, treating with a chelating agent, in which the bleaching and treating steps are carried out in sequence without an intermediate washing step, washing the bleached pulp, and bleaching with hydrogen peroxide.