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一种新型Bronsted酸性离子液体的脱硫性能
韩钊,赵莹,王丝丝,宋昭峥
(中国石油大学(北京)重质油国家重点实验室,北京 102249)
摘要:
采用两步法制备一种新型Bronsted酸性离子液体,测量其密度和黏度,对汽油脱硫的最优条件以及离子液体的脱硫能力和再生能力进行考察。结果表明:新型Bronsted酸性离子液体的密度和黏度与温度呈负相关关系,且与阳离子烷基侧链的长度有关;最优的脱硫条件为温度40 ℃,剂油比1∶5,萃取时间40 min,模拟汽油中的噻吩经过三级脱硫脱除率超过85%;1-辛基-3-甲基咪唑硫氰酸盐离子液体经过五级萃取后回收率为26.0%,脱硫恢复能力为82.1%;与环丁砜分步萃取可将模拟汽油中83.7%的噻吩脱除。
关键词:  离子液体  萃取  脱硫  噻吩
DOI:10.3969/j.issn.1673-5005.2019.06.019
分类号::TE 65
文献标识码:A
基金项目:国家自然科学基金项目( 51474223)
Desulfurization property of a new Bronsted acidic ionic liquid
HAN Zhao, ZHAO Ying, WANG Sisi, SONG Zhaozheng
(State Key Laboratory of Heavy Oil Processing in China University of Petroleum(Beijing), Beijing 102249, China)
Abstract:
A new type of Bronsted acidic ionic liquid was synthesized by two-step method, in which the viscosity and density were measured. The optimal conditions for gasoline desulfurization, and the desulfurization capacity and regenerative capacity of the ionic liquids were investigated. The results show that the density and viscosity of the synthesized ionic liquids are negatively correlated with the temperature and closely related to different branch length of cations.It is also found that the optimum desulfurization conditions are that temperature is 40 ℃, the ratio of agent to oil is 1∶5, and the extraction time is 40 min, through which the thiophene from model gasoline could be removed almost 85% after 3-stage desulfurization. In addition, after five times multi-stage extraction, the recovery efficiency of the ionic liquids is 26.0%, and the desulfurization efficiency of regenerated can reach 82.1%. 83.7% thiophene in the model gasoline can be removed when using the combination of and sulfolane.
Key words:  ionic liquid  extraction  desulfurization  thiophene
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