2013•Advanced materials researchOpen access

Comparison between Green Liquor Pretreatment-Kraft Pulping and Conventional Kraft Pulping

Zhang Hong Xie, Jing Hui Zhou, Hai Ming Li, Guang Wei Sun

Abstract

This paper studied the differences of pulping performances, beating characteristics and strength properties between green liquor pretreatment-Kraft pulping and conventional Kraft pulping based on previous optimized pulping conditions. The green liquor pretreatment-Kraft pulping has higher yield, lower Kappa number, reduced residual effective alkali and decreased viscosity. Green liquor pretreatment improves pulp strength properties although green liquor pretreatment-Kraft pulp has beating characteristics similar to conventional Kraft pulp.

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Key concepts: Kappa number, Kraft process, Kraft paper, Soda pulping, Pulp and paper industry, Pulp (tooth), Black liquor, Chemistry