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HERO ID
8722896
Reference Type
Journal Article
Title
Separation of benzene and cyclohexane by batch extractive distillation
Author(s)
Xu, J; Zhang, W; Gui, X
Year
2007
Is Peer Reviewed?
1
Journal
Tianjin University. Transactions
ISSN:
1006-4982
Volume
13
Issue
6
Page Numbers
433-436
Language
English
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-38949218487&partnerID=40&md5=f8b769da248a3be0a9b3e9d0e47c419f
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Abstract
Azeotropic liquid mixture cannot be separated by conventional distillation. But extractive distillation or combination of the two can be valid for them. An experiment to separate benzene and cyclohexane by batch extractive distillation was carried out with N, N-dimethylformide (DMF), dimethyl sulfoxide (DMSO) and their mixture as extractive solvent. The effect of the operation parameters such as solvent flow rate and reflux ratio on the separation was studied under the same operating conditions. The results show that the separation effect was improved with the increase of solvent flow rate and the reflux ratio; all the three extractive solvents can separate benzene and cyclohexane, with DMF being the most efficient one, the mixture the second, and DMSO the least. In the experiment the best operation conditions are with DMF as extractive solvent, the solvent flow rate being 12.33 mL/min, and the reflux ratio being 6. As a result, we can get cyclohexane from the top of tower with the average product content being 86.98%, and its recovering ratio being 83.10%.
Keywords
Batch extractive distillation; Benzene; Cyclohexane
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