Pulping Additives Roundtable, 1996 Pulping Conference Proceedings
Mike Haas
Longview Fibre Company
Pulping additives roundtable panelists will discuss the use of anthraquinone (AQ), polysulfide, and / or surfactants in their mills’ pulping processes. These additives have become more prevalent in alkaline pulping in recent years. They can improve yield, offsetting escalating wood costs; maintain yield and strength at lower kappa number, better preparing pulp for low chlorine and chlorine free bleaching sequences; reduce loading on recovery, increasing pulp production; and reduce rejects, improving pulp cleanliness. AQ, polysulfide, and surfactants can be used independently or in combination. The use of AQ and polysulfide can have a synergistic effect on pulp yield improvement. Surfactants improve liquor penetration rate into the chips, and might therefore increase the efficiency of AQ and polysulfide applications.
Pulping Additives Roundtable, 1996 Pulping Conference Proceedings