Etherification of glycerol with isobutene on sulfonated graphene: reaction and separation
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Zhou, Jinxia
- 通讯作者：
- Zhou, JX (reprint author), Dalian Univ, Coll Environm & Chem Engn, Dalian 116012, Peoples R China.
- 合写作者：
- Wang, Yu,Guo, Xinwen,Mao, Jingbo,Zhang, Shuguang
- 发表时间：
- 2014-01-01
- 发表刊物：
- GREEN CHEMISTRY
- 收录刊物：
- SCIE、Scopus
- 文献类型：
- J
- 卷号：
- 16
- 期号：
- 11
- 页面范围：
- 4669-4679
- ISSN号：
- 1463-9262
- 摘要：
- A sulfonated graphene catalyst (SG) prepared by grafting sulfonic acid-containing aryl radicals onto the two-dimensional surface of graphene was used for the etherification of glycerol with isobutene, and a reaction-extraction process was developed for easy realization of product isolation and catalyst recycling. With its ultra thin two-dimensional open substrate, stable sulfonic acid sites, amphiphilic properties and light texture, SG exhibited excellent catalytic performance in the etherification reaction. At 60-70 degrees C with 4 wt% catalyst loading and a molar ratio of isobutene/glycerol 4, a nearly complete conversion of glycerol in 7 h and a selectivity of more than 90 mol% to desired multi-butyl glycerol ethers were achieved. Moreover, undesired oligomerization of isobutene was successfully suppressed. When extracted with fresh glycerol, the mixture after reaction was successfully layered to two phases, with a transparent liquid containing no less than 96 wt% di- and tri-butyl glycerol ethers in the top phase as a product and a black mixture consisting of glycerol and SG in the bottom phase which can be used to start a new run with fresh isobutene addition. During six consecutive reaction-extraction cycles the catalyst maintained its robust performance.
- 是否译文：
- 否
