• 中文
    • English
  • English 
    • 中文
    • English
  • Login
View Item 
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Direct transformation of cellulose into methyl and ethyl glucosides in methanol and ethanol media catalyzed by heteropolyacids

Thumbnail
Full Text
Direct transformation of cellulose into methyl and ethyl glucosides in methanol and ethanol media catalyzed by heteropolyacids.htm (413bytes)
Date
2010-11-13
Author
Deng, Weiping
Liu, Mi
Zhang, Qinghong
张庆红
Wang, Ye
王野
Collections
  • 化学化工-已发表论文 [14469]
Show full item record
Abstract
The alcoholysis of cellulose in methanol and ethanol media has been studied in the presence of various kinds of acid catalysts. Keggin-type tungstosilicious and tungstophosphoric acids (H(4)SiW(12)O(40) and H(3)PW(12)O(40)) were found to be highly efficient for the alcoholysis of cellulose. Methyl and ethyl glucosides (both containing alpha and beta isomers) could be obtained in methanol and ethanol with yields as high as 57% and 63%, respectively. The ratio of alpha and beta isomers was similar to 1.4-1.6 in both methyl or ethyl glucosides, suggesting the intermolecular transformations between alpha and beta isomers. Our comparative studies show that the alcoholysis of cellulose in methanol or ethanol proceeds more efficiently than the hydrolysis of cellulose in water medium. Glucose yields of only about 5-10% were obtained in water in the presence of an acid catalyst under similar reaction conditions. (C) 2010 Elsevier B. V. All rights reserved.
Citation
CATALYSIS TODAY,2011,164(1):461-466
URI
http://dx.doi.org/doi:10.1016/j.cattod.2010.10.055
WOS:000289716300083
https://dspace.xmu.edu.cn/handle/2288/11691

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies
 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies