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Separation of phenolic compounds from oil mixtures by betaine‐based deep eutectic solvents
Asia-Pacific Journal of Chemical Engineering ( IF 1.8 ) Pub Date : 2020-06-08 , DOI: 10.1002/apj.2515
Guangsheng Li 1 , Qiang Xie 1 , Qian Liu 1 , Jinchang Liu 1 , Chaoran Wan 1 , Dingcheng Liang 1 , Haiyong Zhang 1
Affiliation  

Separation of phenolic compounds from coal tar is of both economic and technological interest in the processing of coal tar. In this work, three deep eutectic solvents (DES) of betaine‐glycerol, betaine‐dl‐lactic acid, and betaine‐levulinic acid were formed and used to extract phenolic compounds from model coal tar. The effects of extraction time, temperature, initial phenol content, and mass ratio of DES to phenol on extraction were investigated. Then, the extraction and formation mechanisms of extractant were studied by the experimental and simulation methods. In addition, the neutral oil entrainment and the recycling of DES were also investigated. The results showed that phenol could be efficiently extracted in short time by three DES and the temperature had little effect on phenol extraction. Fourier transform infrared spectroscopy and deformation charge density indicated that the three DES are formed with hydrogen bonding interaction, the hydrogen bond acceptor and hydrogen bond donor of DES can form hydrogen bonding with phenol, respectively, and then synergistic extract phenol from model oil. The betaine‐glycerol (Bet‐Gly) was determined to be the preferable solvent with the extraction efficiency of 94.6% and 5.2% neutral oil entrainment under optimal conditions. It is an advantageous extractant in the separation of phenolic compounds from coal tar.

中文翻译:

基于甜菜碱的深共熔溶剂从油混合物中分离酚类化合物

从煤焦油中分离酚类化合物对煤焦油的加工具有经济和技术意义。在这项工作中,甜菜碱-甘油,甜菜碱-dl的三种深共熔溶剂(DES)形成了乳酸和甜菜碱乙酰丙酸,并用于从模型煤焦油中提取酚类化合物。研究了萃取时间,温度,初始苯酚含量以及DES与苯酚的质量比对萃取的影响。然后,通过实验和模拟方法研究了萃取剂的萃取和形成机理。另外,还研究了中性油夹带和DES的再循环。结果表明,三种DES可以在短时间内有效地提取苯酚,而温度对苯酚的提取影响很小。傅里叶变换红外光谱和形变电荷密度表明,这三个DES是通过氢键相互作用形成的,DES的氢键受体和氢键供体可以分别与酚形成氢键,然后从模型油中协同提取酚。甜菜碱甘油(Bet-Gly)被确定为最佳溶剂,在​​最佳条件下的萃取效率为94.6%和中性油夹带5.2%。它是从煤焦油中分离酚类化合物的有利萃取剂。
更新日期:2020-06-08
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