The Alkaline Reactions of Some Simple Quinonemethide-Anthrahydroquinone Adducts
作者:
DonaldR. Dimmel,
Donaline Shepard,
期刊:
Journal of Wood Chemistry and Technology
(Taylor Available online 1982)
卷期:
Volume 2,
issue 1
页码: 73-95
ISSN:0277-3813
年代: 1982
DOI:10.1080/02773818208085121
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The rapid delignification rates associated with anthraquinone-alkaline pulping could be due to the formation and reactions of lignin qulnonemethide-anthrahydroquinone (QM-AHQ) adducts. The chemistry of some simple QM-AHQ adducts is examined here. Upon heating in aqueous alkali, the QM-AHQ adducts fragment to QMs and AHQ. At 100° the adducts are reduced by AHQ dianion to afford QM-anthrone adducts and anthraquinone. At typical pulping temperatures (173°), the adducts are extensively, but not completely, decomposed, releasing AHQ and/or anthraquinone.
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