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首页> 外文期刊>Journal of Wood Chemistry and Technology >Influence of acid prehydrolysis on the process of wood oxidation into vanillin and pulp
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Influence of acid prehydrolysis on the process of wood oxidation into vanillin and pulp

机译：酸性辐射溶解对香草蛋白和纸浆的木材氧化过程的影响

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摘要

The influence of pine wood (Pinus Sylvestris) prehydrolysis on the consumption of main reagents (O-2 and NaOH) in the subsequent catalyzed oxidation of the obtained lignocelluloses into vanillin and pulp has been studied. Prehydrolysis of the feedstock was performed with HCl in the water and gas phases. Catalytic oxidation was performed in an autoclave in an aqueous-alkaline medium in the presence of CuO as a catalyst. Native lignin was shown to be inhomogeneous in the process of oxidation into vanillin, and in the first approximation lignin consists of two fractions: the first, which is easily and selectively oxidized to vanillin, and the second, which is oxidized slowly and non-selectively. Acid-catalyzed prehydrolysis of wood leads to further differentiation of the lignin into the selectively and non-selectively oxidizing fractions. The developed two-stage process (prehydrolysis of wood and oxidation of the resulting lignocelluloses) decreases the consumption of NaOH in the oxidation process by 2-5 times as compared to the known data down to the values of 3.7-5.2 g per g of vanillin obtained.
机译：研究了松木（Pinus Sylvestris）对所得木质纤维素的后续催化氧化在香草蛋白和纸浆中的主要试剂（O-2和NaOH）消耗的影响。用HCl在水和气相中进行原料的预水解。在CuO作为催化剂存在下在水性碱性介质中在高压釜中进行催化氧化。当地木质素被证明在氧化过程中在香草醛中不均匀，并且在第一近似木质素中由两个级分组成：首先，这是容易且选择性地氧化成Vanillin，第二种，其是缓慢和非选择性氧化的。木材的酸催化预水解导致木质素进一步分化成选择性和非选择性氧化级分。开发的两阶段方法（对所得木质纤维素的氧化的氧化氢）降低了氧化过程中NaOH在氧化过程中的消耗2-5次，与已知数据降至每G的香草素的3.7-5.2克的值相比获得。

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  • 来源
    《Journal of Wood Chemistry and Technology》 |2020年第6期|421-433|共13页
  • 作者

    Tarabanko Valery E.; Kaygorodov Konstantin L.; Vigul Dmitry O.; Tarabanko Nikolay; Chelbina Yulia V; Smirnova Marina A.;

  • 作者单位

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

    FRC Krasnoyarsk Sci Ctr SB RAS Inst Chem & Chem Technol SB RAS 50-24 Akad Gorodok Krasnoyarsk 660036 Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sustainable chemistry; oxidation; lignin; vanillin; hemicelluloses; selectivity;

    机译：可持续化学;氧化;木质素;香草蛋白;半纤维素;选择性;

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