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首页> 外文期刊>Journal of Wood Chemistry and Technology >CHEMICAL PROPERTIES OF SOFTWOOD SODA-ANTHRAQUINONE LIGNIN
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CHEMICAL PROPERTIES OF SOFTWOOD SODA-ANTHRAQUINONE LIGNIN

机译：软木苏打蒽醌木质素的化学性质

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摘要

Soda-anthraquinone (soda-AQ) cooking, focused on obtaining lignin rather than cellulose, was performed under various cooking conditions. The lignin obtained by acidification of the spent liquor to pH 5 was chemically characterized and the correlation between the cooking conditions and the chemical properties of lignin was discussed. The lignin yield ranged from 6.7 to 13.3% on wood, depending on the cooking conditions. The phenolic hydroxyl group content of the lignin was about twice that of wood lignin and similar to that of commercial pine kraft lignin. The cooking time of the soda-AQ cooking significantly influenced the vanillin yield of the lignin by nitrobenzene oxidation. The vanillin yield of the lignin was less than half that of wood lignin and MWL. The non-phenolic alpha-O-4 linkage of the lignin was more stable than the non-phenolic beta-O-4 linkage of the lignin under soda-AQ cooking.
机译：在各种蒸煮条件下，着重于获取木质素而不是纤维素的苏打蒽醌（soda-AQ）蒸煮。对通过将废液酸化至pH 5而获得的木质素进行化学表征，并讨论了蒸煮条件与木质素化学性质之间的相关性。根据烹饪条件的不同，木质素在木材上的产率为6.7％至13.3％。木质素的酚羟基含量约为木木质素的两倍，与市售松木硫酸盐法木质素相似。苏打-AQ蒸煮的蒸煮时间通过硝基苯氧化显着影响木质素的香兰素产率。木质素的香兰素产率不到木质木质素和MWL的一半。在苏打-AQ蒸煮下，木质素的非酚类α-O-4键比木质素的非酚类β-O-4键更稳定。

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