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Impact of hexeneuronic acid to kappa number determination in hardwood chemical pulps  

Shin, Soo-Jeong (Department of Wood and Paper Science, College of Agriculture, Life & Environment Sciences, Chungbuk National University)
Sung, Yong-Joo (Dept. of Bio Based materials.College of Agriculture and Life Science, Chungnam Natl. Univ.)
Park, Jong-Moon (Department of Wood and Paper Science, College of Agriculture, Life & Environment Sciences, Chungbuk National University)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.42, no.2, 2010 , pp. 35-40 More about this Journal
Abstract
Variations in hexeneuronic acid content in hardwood alkaline pulps were investigated to evaluate their contribution to kappa number. Out of diverse chemical pulps the highest hexeneuronic acid content were measured in yellow poplar kraft pulping, which was assumed to enhance ca. 7.0 of kappa number determined by acid permanganate consumption. In yellow poplar soda-anthraquinone pulping, hexeneuornic acid was contributed to increment of 5.0-6.0 kappa number. In eucalyptus alkaline pulping, hexeneuronic acid content was not significantly different from soda-anthraquinone pulping. Increment of Kappa number by hexeneuronic acid was 4.5-5.6 depending on pulping method and pulping time at target temperature.
Keywords
hexeneuronic acid; kappa number; kraft pulping; soda-anthraquinone pulping; yellow poplar; eucalyptus;
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