The Effect of Electrolytes on the Leaching of Lignin From Unbleached Kraft Pulp Fibers

B. D. Favis Pulp and Paper Research Institute of Canada and Department of Chemistry, McGill University, Montreal, Quebec, Canada, H3A 2A7

J. M. Willis Pulp and Paper Research Institute of Canada and Department of Chemistry, McGill University, Montreal, Quebec, Canada, H3A 2A7

D. A. I. Goring Pulp and Paper Research Institute of Canada and Department of Chemistry, McGill University, Montreal, Quebec, Canada, H3A 2A7

Abstract

When an unbleached kraft pulp is suspended in aqueous solutions of electrolytes, the rate of leaching of lignin from the fiber wall is found to decrease with an increase in the ionic strength of the electrolyte. The effect was found to be greater with divalent ions (Mg⁺⁺, Ca⁺⁺, Zn⁺⁺) than with a monovalent ion, Na⁺.

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The Effect of Electrolytes on the Leaching of Lignin From Unbleached Kraft Pulp Fibers

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The Effect of Electrolytes on the Leaching of Lignin From Unbleached Kraft Pulp Fibers

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