REACTIVITY TOWARD PHENOL OF LIGNIN FROM THE HYDROLYSIS OF SWEETGUM WOOD WITH CONCENTRATED SULFURIC-ACID

被引:9
|
作者
SHARMA, DK
GOLDSTEIN, IS
机构
[1] Department of Wood and Paper Science, North Carolina State University, Raleigh, NC
关键词
D O I
10.1080/02773819008050246
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
Sweetgum wood was hydrolyzed at 20° and 50° C for different time periods with 68% sulfuric acid. The lignin residues obtained were subjected to a phenolation reaction. For lignin prepared at the lower temperature the maximum phenol uptake was 9.5%, and at the higher temperature only 5-6%. When wood prehydrolyzed with dilute acid was used the phenol uptake rose to 12.5%. However, all the sulfuric acid hydrolysis lignins showed much lower reactivity toward phenol than the 20% phenol uptake exhibited by lignin isolated using concentrated hydrochloric acid. © 1990, Taylor & Francis Group, LLC. All rights reserved.
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页码:379 / 386
页数:8
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