Technology for Total Chlorine-free Bleaching of Kraft Pulp

DOI Web Site 3 Citations 18 References
  • Ohi Hiroshi
    Graduate School of Life and Environmental Sciences, University of Tsukuba

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Other Title
  • 完全非塩素系によるパルプ漂白技術
  • カンゼン ヒエンソケイ ニ ヨル パルプ ヒョウハク ギジュツ

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Abstract

Acid treatment was developed for non-chlorine bleaching of an oxygen-delignified hardwood kraft pulp. About 70% hexenuronic acid in the kraft pulp was removed after the acid treatment at pH 3 for 1 hour at 105°C. After full bleaching with the acid treatment (A) followed by the ozone (Z) and the hydrogen peroxide (P) , the final brightness of the pulp reached approximately 85% ISO, keeping the viscosity over 15. 0cP. Little hexenuronic acid existed in the kraft pulp after this bleaching (A-Z-E-P) . Furthermore, the brightness stability of this pulp was much better than that of chlorine dioxide bleached pulps.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 60 (11), 1659-1663, 2006

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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