离子液体催化合成双烷基二苯醚

doi:10.13218/j.cnki.csdc.2018.09.007

摘要/Abstract

摘要： 以盐酸三乙胺/三氯化铝(Et₃NHCl-AlCl₃)离子液体为催化剂,二苯醚和1-十二烯烃为原料合成了双烷基二苯醚。通过正交试验,得到烷基化反应的较优工艺条件为:n(二苯醚)∶n(1-十二烯烃)=1∶3,二苯醚用量0.3 mol,催化剂用量0.045 mol,反应温度70 ℃,反应时间1 h。在此条件下,烷基化转化率为98.1%,双烷基二苯醚选择性为33.7%。改变离子液体的阳离子和阴离子部分结构,研究了催化剂结构对其催化性能的影响。结果表明,该类催化剂的催化活性主要由阴离子部分的结构决定,较优的阴阳离子组合为Et₃NHCl-AlCl₃。

关键词: 离子液体, 烷基化反应, 双烷基二苯醚, 双子表面活性剂

Abstract: The ionic liquid Et₃NHCl-AlCl₃ was used to catalyze the alkylation of diphenyl ether with 1-dodecene to synthesize di-dodecyl diphenyl ether.When the molar ratio of diphenyl ether/1-dodecene was 1∶3 (0.3 mol diphenyl ether),the optimized conditions of alkylation reaction obtained by orthogonal experimental method were catalyst dosage of 0.045 mol,reaction temperature of 70 ℃ and reaction time of 1 h.The conversion of diphenyl ether reaches 98.1% and the selectivity is 33.7% under such optimized conditions.The influences of catalyst structure on its catalytic activity were also investigated by changing the structure of the cationic and anionic parts of ion liquids.The results show that the catalytic activity is determined by the structure of the anion,and the best catalyst is Et₃NHCl-AlCl₃.

Key words: ionic liquid, alkylation reaction, di-alkylated diphenyl ether, Gemini surfactant

中图分类号:

TQ423

白龙,刘晓臣,王晓朋,霍月青,牛金平. 离子液体催化合成双烷基二苯醚[J]. 日用化学工业, 2018, 48(9): 516-520.

BAI Long,LIU Xiao-chen,WANG Xiao-peng,HUO Yue-qing,NIU Jin-ping. Synthesis of di-alkylated diphenyl ether catalyzed by ionic liquids[J]. China Surfactant Detergent & Cosmetics, 2018, 48(9): 516-520.

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