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Chemcial Industry and Engineering 2014, Vol. 31 Issue (6) :35-40    DOI: doi: 10.13353/j.issn.1004.9533.2014.06.007
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Separation of Acetonitrile-1-Propanol by Extractive Distillation
 ZHAO  Han-Xue, BAI  Peng, GAO  Rui-Chang, LI  Ying, LI  Shuai-Rong
School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

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Abstract This paper studies on separation of acetonitrile-1-propanol by extractive distillation. First, N-methyl pyrrolidone was chosen as the solvent by the basic selection rules and the UNIFAC group contribution method. The simulation of vapor-liquid equilibrium using NRTL model for acetonitrile-1-propanol with and without N-methyl pyrrolidone under atmospheric pressure and vapor-liquid equilibrium experiment were performed and the simulation results agreed well with the experimental data. Then the batch extractive distillation experiment was performed to investigate the effectiveness of the selected solvent. The results show that N-methyl pyrrolidone as solvent can break the azeotrope of acetonitrile-1-propanol system and separate the azeotrope effectively. The batch extractive distillation was carried out in a packed column of 28 theoretical plates and the extractive solvent flowed inside on the fourth plate. With the reflux ratio of 3 and the solvent mole ratio of 1∶1, the product mass fraction of acetonitrile reaches 98.6%. Finally, Aspen Plus was used to simulate the continuous extractive distillation process and the technological parameters can provide some reference basis for the industrial production.
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Articles by authors
ZHAO Han-Xue
BAI Peng
GAO Rui-Chang
LI Ying
LI Shuai-Rong
Keywordsextractive distillation;   acetonitrile;   1-propanol;   N-methyl pyrrolidone;   simulation     
Received 2013-04-19;
Corresponding Authors: 白鹏,电话:(022)27406369,E-mail:bp2008@eyou.com。     Email: bp2008@eyou.com
About author: 赵含雪(1987-),女,硕士研究生,现从事化工分离方向的研究。
Cite this article:   
ZHAO Han-Xue, BAI Peng, GAO Rui-Chang, LI Ying, LI Shuai-Rong.Separation of Acetonitrile-1-Propanol by Extractive Distillation[J]  Chemcial Industry and Engineering, 2014,V31(6): 35-40
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