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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Acetic acid pulping of wheat straw under atmospheric pressure

Journal of Wood Science volume 45, pages 319–325 (1999)Cite this article

Abstract

Atmospheric acetic acid pulping of wheat straw was carried out. Pulping conditions and their effects on pulp properties were investigated in detail, and a comparison between acetic acid (AcOH) pulp and soda-anthraquinone (AQ) pulps of wheat straw was made of the chemical composition, strength, and fiber morphology of the pulps. Wheat straw was successfully pulped and fractionated into pulp (cellulose), acetic acid lignin, and sugars (monosaccharides from hemicellulose), making it easy to utilize them. It was found that among the pulping conditions the dosage of H2SO4 as catalyst was the most notable, and the extent and rate of delignification could be controlled by varying the amount of the catalyst. The results also showed that acetic acid pulp was quite different from soda-AQ pulp. About 70% of the ash or 90% of the silica in wheat straw were kept in AcOH pulp. The ash might function as filler and be beneficial to the printability of paper. It was known that many epidermal cells existed in AcOH pulp in bundles or in single cells. These ash-rich nonfiber cells seemed to hinder the bonding between fibers. AcOH pulp had lower strength than soda-AQ pulp, which might result mainly from the chemical damage of fibers caused by acid, not from the depolymerization of cellulose.

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Authors and Affiliations

  1. Laboratory of Paper Science and Technology, Department of Chemical Engineering, Tianjin University of Light Industry, 1038 Dagu Nanlu, 300222, Tianjin, China

    Xue-Jun Pan

  2. Department of Forest Science, Faculty of Agriculture, Hokkaido University, Kita-9, Nishi-9, 060-8589, Kita-ku, Sapporo, Japan

    Yoshihiro Sano

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  1. Xue-Jun Pan
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  2. Yoshihiro Sano
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Correspondence to Yoshihiro Sano.

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Pan, XJ., Sano, Y. Acetic acid pulping of wheat straw under atmospheric pressure. J Wood Sci 45, 319–325 (1999). https://doi.org/10.1007/BF00833497

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