β-环糊精协同乙烯基咪唑离子液体脱除溶剂油中的萘

doi:10.16085/j.issn.1000-6613.2019-1111

摘要/Abstract

摘要：

采用1-乙烯基-3-正丁基溴代咪唑离子液体（[VBIM]Br）为脱除剂，在β-环糊精协同作用下萃取溶剂油中的萘。本实验考察了不同单因素条件在[VBIM]Br离子液体与β-环糊精共同作用下对溶剂油中脱萘率的影响，同时通过响应面法优化脱除工艺条件。实验结果表明：[VBIM]Br离子液体与β-环糊精共同作用下对萘的萃取率比单独利用[VBIM]Br离子液体提高了15%以上，萃取率达到90%以上。离子液体简单回收后，重复使用5次过后，脱除率仍在80%以上。实验通过红外分析和紫外光谱分析了[VBIM]Br离子液体协同β-环糊精脱萘的机理，与[VBIM]Br离子液体协同作用下，β-环糊精对萘存在包合作用，实现了对溶剂油中萘的脱除。

关键词: 溶剂油, 萘, 1-乙烯基-3-正丁基溴代咪唑离子液体, β-环糊精, 响应面, 萃取

Abstract:

In this experiment, 1-vinyl-3-butylimidazole brominated ionic liquid ([VBIM]Br) and β-cyclodextrin was used to remove naphthalene in the solvent oil. The effects of different single factor conditions on the removal rate of naphthalene in solvent oil under the joint action of [VBIM]Br ionic liquid and β-cyclodextrin were investigated, and the removal process conditions were optimized by response surface analysis. The experimental results showed that: the removal rate of naphthalene by [VBIM]Br ionic liquid combined with β-cyclodextrin was improved by more than 10% compared with that of [VBIM]Br ionic liquid used alone, and the extraction rate reached 90%. The removal rate of simply-recovered ionic liquid was reduced to 80% after 5 repetitions. The removal mechanism of naphthalene was analyzed by infrared and ultraviolet spectroscopy. In coordination with [VBIM]Br ionic liquid, β-cyclodextrin encapsulated naphthaleneis, and achieved the removal of naphthalene from solvent oil.

Key words: solvent oil, naphthalene, [VBIM]Br, β-cyclodextrin, response surface analysis, extraction

中图分类号:

TQ028.3⁺2

李恩田,徐洋,姚培,朱媛媛,张怿涵,朱霞石. β-环糊精协同乙烯基咪唑离子液体脱除溶剂油中的萘[J]. 化工进展, 2020, 39(4): 1321-1328.

Entian LI,Yang XU,Pei YAO,Yuanyuan ZHU,Yihan ZHANG,Xiashi ZHU. Remove naphthalene from solvent oil by vinyl imidazole ionic liquid and β-cyclodextrin[J]. Chemical Industry and Engineering Progress, 2020, 39(4): 1321-1328.

图/表 12

图1 1-乙烯基-3-正丁基咪唑离子液体的红外表征图

图2 室温下不同离子液体对萘脱除率的影响

图3 [VBIM]Br离子液体与不同添加剂对模拟油的脱萘率

图4 不同剂油比对离子液体脱萘率的影响

图5 温度对离子液体脱萘率的影响

图6 不同β-环糊精用量对离子液体脱萘率的影响

图7 萃取时间对离子液体与β-环糊精脱萘率的影响

表1 脱除萘的二次曲面模型的方差分析及回归系数显著性检验

方差来源	平方和	自由度	均方	F值	P值 Prob＞F	显著性
模型	1191.99	9	132.44	67.29	＜0.0001	极显著
剂油比（A）	654.68	1	654.68	332.64	＜0.0001	极显著
β-环糊精（B）/g·(10mL)^-1	12.25	1	12.25	6.22	0.041	显著
温度（C）/℃	5.83	1	5.83	2.96	0.129	不显著
AB	5.29	1	5.29	2.69	0.145	不显著
AC	16.93	1	16.93	8.60	0.022	显著
BC	1.88	1	1.88	0.95	0.361	不显著
A²	76.49	1	76.49	38.87	0.0004	显著
B²	385.20	1	385.20	195.72	< 0.0001	极显著
C²	4.66	1	4.66	2.37	0.168	不显著
残差	13.78	7	1.97	—	—	—
失拟项	11.45	3	3.82	6.56	0.0504
纯误差	2.33	4	0.58	—	—	—

图8 离子液体回收利用次数对脱萘率的影响

图9 β-环糊精、[VBIM]Br中的β-环糊精以及脱萘后离子液体相中的β-环糊精的红外表征谱图

图10 β-环糊精-oil和离子液体-β-环糊精-oil双倒数曲线图

图11 离子液体与β-环糊精共同脱萘原理

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