Title
Effectiveness of ultra-fine anthraquinone in the kraft pulping of eucalyptus wood
Authors
JING LI HUICHAO HU NENGBIAO LIN XIN-SHENG CHAI and DONALD G. BARNES

Received September 12, 2014
Published Volume 50 Issue 1 January
Keywords anthraquinone, ultra-fine particles, kraft pulping, effectiveness, energy efficiency

Abstract
This paper reports on an investigation of the effectiveness of ultra-fine anthraquinone (UF-AQ) in the kraft pulping process of eucalyptus wood. The results of the pulping process using UF-AQ are compared to the results of pulping with commercial AQ (C-AQ) and using no AQ. The delignification in the pulping process using UF-AQ is more effective than that of the C-AQ involving process. The use of UF-AQ also improved pulp yield, albeit to a lesser degree than the improvement in delignification, and had no significant effect on fiber length. The study also showed that the UF-AQ pulping significantly reduced the consumption of the effective alkali. In summary, the application of UF-AQ shows great promise for improving the AQ-assisted kraft pulping process in terms of increased effectiveness of energy, chemical consumption and raw material utilization.