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2003 Fiscal Year Final Research Report Summary

Stepwise removal of lignin and silica from rice straw by weak alkali -oxygen cooking

Research Project

Project/Area Number 13556056
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 生物資源科学
Research InstitutionThe University of Tokyo

Principal Investigator

MESHITSUKA Gyosuke  THE UNIVERSITY OF TOKYO, Graduate School of Agricultural and Life Sciences, Professor, 大学院・農学生命科学研究科, 教授 (30012074)

Co-Investigator(Kenkyū-buntansha) 新谷 博幸  東京大学, 大学院・農学生命科学研究科, 助手 (30282693)
Project Period (FY) 2001 – 2003
Keywordslignin / rice straw / biomass / chemical pulp / oxygen / silica / methoxyl group
Research Abstract

Silica removal from the rice straw during pulping was dependent on the pH of the cooking liquor. As far as strong alkali is used for the delignification, dissolution of silica into the cooking liquor cannot be avoided. In order to control the silica removal from rice straw during pulping, oxygen-sodium sulfite pulping and oxygen-ammonia pulping were examined. It was found that a high retention of silica in pulp with very low lignin content could be achieved by these pulping methods. The applicability of weak alkali for delignification from rice straw created an interest in examining the structure of what was determined as lignin in rice straw. It was suggested that typical methods for the determination of lignin in wood such as Klason method and others, when applied to non-woody cell wall, could overestimate the amount of lignin significantly.
Delignification with higher carbohydrate yield can be achieved by oxygen-sodium sulfite pulping. This was attributed to a less degradation of hemicellulose during the pulping by this method. Based on these results, two stage pulping method consisting of delignification stage followed by silica removal stage was proposed.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Tomoya Yokoyama 他3名: "Enhancement of the Reaction between Pulp Components and Produced by the Decomposition of Hydrogen Peroxide under Alkali Conditions"J.Wood Sci. 48. 191-196 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroyuki Shintani 他2名: "The Structural Characteristics of High Molecular Weight Chlorolignin Chlorine Bleaching of Kraft Pulps"Japan TAPPI Journal. 57(12). 104-110 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Zhenfu Jin 他5名: "Changes in lignin content of leaf litters during mulching"Phytochemistry. 64. 1023-1031 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takuya Akiyama 他3名: "Ratio of erythro and threo forms of β-O-4 structures in tension wood lignin."Phytochemistry. 64. 1157-1162 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hikaru Aimi 他2名: "Structure of small lignin fragment retained in water-soluble polysacch from MWL isolation residue"J.Wood Science. (printing). (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iori Tomoda 他2名: "The Role of Alkali-Hydrogen Peroxide during Pulp Treatment"Japan TAPPI Journal. (printing). (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iori Tomoda 他2名: "Semi-quantitative Method to Evaluate the α-Carbonyl Content in Lignin"J. Wood Science. (printing). (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hitoshi Goto 他4名: "Interfering Effects of carbohydrates on the determination of methoxyl group content of lignin in woody samples"J.Wood Chemistry and Technology. (受理済). (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tomoya Yokoyama, Yuji Matsumoto, Gyosuke Meshitsuka.: "Enhancement of the Reaction between Pulp Components and Hydroxyl Radical Produced by the Decomposition of Hydrogen Peroxide under Alkali Conditions."J. Wood Sci. 48. 191-196 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Shintani, Yuji Matsumoto, Gyosuke Meshitsuka.: "The Structural Characteristics of High Molecular Weight Chiorolignin Produced by Chlorine Bleaching of Kraft Puips"Japan TAPPI Journal. 57(12). 104-110 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Zhenfu Jin, Takuya Akiyama, Byung Yeoup Chung, Yuji Matsumoto, Kenji liyama, Satomi Watanabe.: "Changes in lignin content of leaf litters during mulching."Phytochemistry. 64. 1023-1031 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takuya Akiyama, Yuji Matsumoto, Takashi Okuyama, Gyosuke Meshitsuka.: "Ratio of erythro and threo forms of β-O-4 structures in tension wood lignin"Phytochemistry. 64. 1157-1162 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hikaru Aimi, Yuji Matsumoto, Gyosuke Meshitsuka.: "Structure of small lignin fragment retained in water soluble polysaccharide extracted from MWL isolation residue"J. Wood Science. (accepted). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iori Tomoda, Yuji Matsumoto, Gyosuke Meshitsuka.: "The Role of Alkali-Hydrogen Peroxide during Pulp Treatment."Japan TAPPI Journal. (aAccepted). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Iori Tomoda, Yuji Matsumoto, Gyosuke Meshitsuka.: "Semi-quantitative Method to Evaluate the α-Carbonyl Content in Lignin. Accepted for the inclusion in 2004 issue of"J. Wood Science. (accepted). (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hitoshi Goto, Keiichi Koda, Goulin Tong, Yuji Matsumoto, Gyosuke Meshitsuka.: "Interfering Effects of carbohydrates on the determination of methoxyl group content of lignin in woody samples"J. Wood Chemistry and Technology. (accepted).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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