Spectroscopic analysis of acetamide-AlCl_(3)-based ionic liquid analog and their catalytic performance in isobutene oligomerization  

作　　者：Pengcheng Hu Ruimin Chai Aonan Lai Shu-Feng Zhou 

机构地区：[1]College of Chemical Engineering,Huaqiao University,Xiamen,361021,Fujian,China

出　　处：《Green Chemical Engineering》2021年第2期233-238,共6页绿色化学工程（英文）

基　　金：support of the National Natural Science Foundation of China(No.21802047);the Scientific Research Funds of Huaqiao University(No.600005-Z17Y0073),Xiamen,China.

摘　　要：The spectral structures of acetamide-AlCl_(3)-based ionic liquid(IL)analogs were determined in detail through IR,NMR,and Raman spectroscopy.IR spectroscopy showed that 0.65AA-1.0AlCl_(3) was the coordination structure of Al and O atoms because of the resonance structure of acetamide.The mutual verification of the results of ^(27)Al NMR and ^(1)H NMR indicated that acetamide coexisted mainly in the form of cationic Al species and molecular Al species in xAA-1.0AlCl_(3),and AA/AlCl_(3) molar ratio affected the transformation of cationic Al species to molecular Al species.xAA-1.0AlCl_(3) was used as a green acidic catalyst for isobutene oligomerization,and the effects of AA/AlCl_(3) molar ratio,reaction temperature,reaction time,and volumetric ratio between IL analog and isobutene on product distribution were investigated.Optimal reaction conditions were AA/AlCl_(3) molar ratio of 0.75,reaction temperature of 60 C,reaction time of 30 min,and catalyst/i-C4¼volumetric ratio of 1.4 v/v.Under optimal conditions,isobutene conversion,(C8^(-)+C12^(-))selectivity,(C16^(-)+C20^(-))selectivity,and by-product selectivity were 85.26,80.20,6.80,and 13.00 wt%,respectively。

关 键 词：OLIGOMERIZATION ISOBUTENE Ionic liquid analog Catalytic performance 

分 类 号：TQ203.3[化学工程—有机化工]