Selective Synthesis of 2,6-Dimethylnaphthalene by Transalkylation in the Presence of Acid Ionic Liquids [Cnmim]Cl-AlCl3

被引：0

作者：

Wu Guang ^{[1
]}

Wu Wei ^{[1
]}

Xiao Lin-fei ^{[1
]}

Liu Dan ^{[1
]}

机构：

[1] Heilongjiang Univ, Heilongjiang Prov Coll, Key Lab Chem Engn Proc & Technol High Efficiency, Sch Chem & Mat Sci, Harbin 150080, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2011年 / 27卷 / 06期

基金：

黑龙江省自然科学基金; 中国国家自然科学基金;

关键词：

Ionic liquid; 2,6-Dimethylnaphthalene; 1-Alkyl-3-methylimidazolium aluminum chloride; Transalkylation; ALKYLATION; METHYLNAPHTHALENE; METHANOL; METHYLATION; NAPHTHALENE; CATALYSTS; GREEN;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A highly selective synthesis of 2,6-dimethylnaphthanlene(2,6-DMN) by transalkylation between 2-methylnaphthanlene(2-MN) and 1,2,4,5-tetramethylbenzene(TeMB) was performed with 1-alkyl-3-methylimidazolium aluminum chloride([C(n)mim]Cl-AlCl3) ionic liquids(ILs) as catalysts. The influences of the alkyl group as the organic cation, the acidic strength of [C(4)mim]Cl-AlCl3 ILs as well as the reaction conditions on the catalytic performance were investigated. [C(4)mim]Cl-AlCl3 ILs[x(AlCl3)=71%] exhibited high activity and selectivity toward 2,6-DMN. The selectivity to 2,6-DMN and the 2,6-DMN/2,7-DMN ratio reached up to 68.2% and 3.7:1, respectively. The UV-Vis spectrum of TeMB treated by different ILs shows that the protonated degree of TeMB dependeds on the acidity strength of ILs, which has a significant impact on the reaction results. The high protonated degree of TeMB is advantageous to enhancing the conversion of transalkylation and the large stereo-hindrance effect of TeMB is favorable to improving the selecivity to 2,6-DMN.

引用

页码：1010 / 1013

页数：4

共 24 条

[1]

Bai XF, 2005, CHEM RES CHINESE U, V21, P680

[2]

Broni O.P., 2006, US, Patent No. 7019186

[3] Shape-selectivity in 2,6-dimethylnaphthalene synthesis over ZSM-5: Computational analysis using density functional theory [J].