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Separation of Benzene-Cyclohexane Azeotropes Via Extractive Distillation Using Deep Eutectic Solvents as Entrainers
Bai, Fang1,2,3; Hua, Chao1,3; Li, Jing1,2,3
2021-02-01
Source PublicationPROCESSES
Volume9Issue:2Pages:13
AbstractThe separation of benzene and cyclohexane azeotrope is one of the most challenging processes in the petrochemical industry. In this paper, deep eutectic solvents (DES) were used as solvents for the separation of benzene and cyclohexane. DES1 (1:2 mix of tetrabutylammonium bromide (TBAB) and levulinic acid (LA)), DES2 (1:2 mix of TBAB and ethylene glycol (EG)) and DES3 (1:2 mix of ChCl (choline chloride) and LA) were used as entrainers, and vapor-liquid equilibrium (VLE) measurements at atmospheric pressure revealed that a DES comprised of a 2:1 ratio of LA and TBAB could break this azeotrope with relative volatility (alpha ij) up to 4.763. Correlation index suggested that the NRTL modelling approach fitted the experimental data very well. Mechanism of extractive distillation gained from FT-IR revealed that with hydrogen bonding and pi-pi bond interactions between levulinic acid and benzene could be responsible for the ability of this entrainer to break the azeotrope.
Keywordbenzene cyclohexane deep eutectic solvents (DES) extractive distillation entrainer
DOI10.3390/pr9020336
Language英语
Funding ProjectNational Key Research and Development Program of China[2019YFC1907600]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Research and Development Program of China
WOS IDWOS:000623172400001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/43540
Collection中国科学院过程工程研究所
Corresponding AuthorHua, Chao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Engn, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Bai, Fang,Hua, Chao,Li, Jing. Separation of Benzene-Cyclohexane Azeotropes Via Extractive Distillation Using Deep Eutectic Solvents as Entrainers[J]. PROCESSES,2021,9(2):13.
APA Bai, Fang,Hua, Chao,&Li, Jing.(2021).Separation of Benzene-Cyclohexane Azeotropes Via Extractive Distillation Using Deep Eutectic Solvents as Entrainers.PROCESSES,9(2),13.
MLA Bai, Fang,et al."Separation of Benzene-Cyclohexane Azeotropes Via Extractive Distillation Using Deep Eutectic Solvents as Entrainers".PROCESSES 9.2(2021):13.
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