Extraction Desulfurization with Synthesized Lews⁃Brönsted Deep Eutectic Solvent at Room Temperature

doi:10.3969/j.issn.1006-396X.2022.04.005

Abstract

Abstract:

A deep eutectic solvent was synthesized by the stirring method with Br?nsted acid (carboxylic acid) and Lews acid (ferric chloride) as raw materials. It was then analyzed with a Fourier transform infrared (FTIR) spectrometer. The results showed that the deep eutectic solvent was formed by hydrogen bonding between Br?nsted acid and Lews acid. Extraction desulfurization with this deep eutectic solvent as the extractant was investigated, and the optimum desulfurization conditions were obtained as follows. When the molar ratio of Br?nsted acid to Lews acid is 1 $∶$ 0.5, the desulfurization temperature is 30 °C, and the ratio of solvent to oil is 1 $∶$ 5, the proposed extractant demonstrates a favorable desulfurization effect on the simulated oil, gasoline, and diesel.

Key words: Deep eutectic solvent, Extraction, Desulfurization

摘要：

以Br?nsted酸（羧酸）和Lews酸（三氯化铁）为原料，通过搅拌方法使之形成低共熔溶剂，并采用红外光谱分析仪对低共熔溶剂进行分析。结果表明，Br?nsted酸与Lews酸通过氢键作用形成低共熔溶剂。以低共熔溶剂为萃取剂进行萃取脱硫研究，得出最佳脱硫条件：Br?nsted酸与Lews的物质的量比为1∶0.5，脱硫温度为30 ℃，剂油体积比为1∶5；在最佳脱硫条件下，低共熔溶剂对模拟油、汽油和柴油有较好的脱硫效果。

关键词: 低共熔溶剂, 萃取, 脱硫

CLC Number:

TE624

Siyu Chen, Shizhao Zhuang, Xiuping Li, Rongxiang Zhao. Extraction Desulfurization with Synthesized Lews⁃Brönsted Deep Eutectic Solvent at Room Temperature[J]. Journal of Petrochemical Universities, 2022, 35(4): 33-37.

陈思宇, 庄仕钊, 李秀萍, 赵荣祥. 室温合成Lews⁃Brönsted型低共熔溶剂萃取脱硫研究[J]. 石油化工高等学校学报, 2022, 35(4): 33-37.

Figures/Tables 8

Fig.1 Infrared spectroscopy of Br?nsted acid,Lews acid and deep eutectic solvent

Fig.2 Influence of five kinds of deep eutectic solvent on desulfurization

Fig.3 Influence of quantitative ration of C1?Br?nsted acid and Lews acid on desulfurization

Fig.4 Influence of reaction temperature on desulfurization

Fig.5 Influence of volume ratio of catalyst oil on desulfurization

Fig.6 Influence of sulfide type on desulfurization efficiency

Fig.7 Desulfurization effect of C1?Br?nsted?Lews deep eutetic solvent on gasoline and diesel

Fig.8 The number of times of extraction on the desulfurization efficiency

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