柠檬酸型低共熔溶剂的合成及其在氧化脱硫中的应用

Synthesis of Citric Acid Type Deep Eutectic Solvent and Its Application in Oxidative Desulfurization

孟庆功 朱昕怡 常晨生 李晏辉 朱宇航 赵岩 李秀萍 赵荣祥

Qinggong MENG Xinyi ZHU Chensheng CHANG Yanhui LI Yuhang ZHU Yan ZHAO Xiuping LI Rongxiang ZHAO

辽宁石油化工大学 环境与安全工程学院，辽宁 抚顺 113001 辽宁石油化工大学 创新创业学院，辽宁 抚顺 113001 辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001

School of Environmental and Safety Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China School of Innovation and Entrepreneurship，Liaoning Petrochemical University，Fushun Liaoning 113001，China School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

以柠檬酸和氯化胆碱为原料合成柠檬酸型低共熔溶剂，通过红外光谱和氢谱确定了低共熔溶剂中存在氢键作用。以低共熔溶剂为萃取剂、过硫酸氢钾为氧化剂，脱除模拟油中的硫化物。对低共熔溶剂中水的质量、氧化剂的质量、n（ChCl）/n（CA）、反应温度和不同硫化物的影响进行考察，并确定了最佳反应条件。结果表明，在模拟油体积为5 mL、n（ChCl）/n（CA）=1.0∶0.5、低共熔溶剂体积为2.0 mL、反应温度为30 ?C、过硫酸氢钾溶液质量为0.6 g、水的质量为0.4 g的条件下，模拟油中的二苯并噻吩（DBT）脱除率为98.50%。低共熔溶剂经过5次重复回收利用后，DBT脱除率仍在95.00%以上。

Citric acid type deep eutectic solvent was synthesized using citric acid（CA） and choline chloride (ChCl) as raw materials. The existence of hydrogen bonding in deep eutectic solvents (DESs) was determined by infrared spectrum and hydrogen spectra. Sulfide in simulated oil was removed using DESs as extractant and potassium bisulfate as oxidant. The effects of the amount of water, the amount of oxidant, the ratio of hydrogen bond donor and acceptor, reaction temperature and different sulfides on desulfurization rate were investigated, and the optimum reaction conditions were determined. The results showed that the removal rate of DBT in simulated oil was 98.50% at V（model oil）=5 mL, n（ChCl）/n（CA）=1.0∶0.5, V（DES）=2.0 mL, T=30 ℃, m(catalyst)=0.6 g, m(water)=0.4 g. After five times of recycling, the desulfurization rate remains above 95.00%.

辽宁省自然科学基金指导计划项目(2019?ZD?0064);辽宁省大学生创新创业训练计划项目(2020101480039)

10.12422/j.issn.1672-6952.2023.05.003