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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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