Kraft Pulping of Eucalyptus with Anthraquinone, Polysulfide, and Surfactant, 2007 Engineering, Pulping & Environmental Conference

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In this research the effect of three chemical additives used in the kraft pulping process of chips of hybrid Eucalyptus grandis x Eucalyptus urophylla: anthraquinone, surfactant and polysulfide and their possible interactions are evaluated. The results point to the fact that the efficiency of the surfactant may be related to the wood characteristics and chip dimensions. The efficiency of the polysulfide is related to the significant modifications of the pulping parameters that can lead to modifications of mill installations. The anthraquinone proved its efficiency on the kraft process independently to the wood characteristics and pulping process parameters and can be effectively classified as a kraft pulping additive.