We will discuss several fundamental aspects that govern the efficiency of kraft pulping in light of a novel impregnation technology that we have been exploring: green liquor impregnation.  This presentation will therefore focus on the fundamental chemical factors that influence the delignification (lignin polymer reduction) of softwood (loblolly pine) as a function of introducing green liquor (a mill-derived high sulfidity liquor) into the chemical pulping system.  The presentation will demonstrate the importance of hydroxide content (alkalinity) in relationship to hydrosulfide content, the action of carbonate during the pulping mechanism, and the critical nature of the macroscopic thickness of the wood chips used.

Dynamics of mill green liquor impregnation of softwood for enhanced processability

244th National Meeting (2012)

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