正丁醇-异丁醇体系汽液平衡关联及萃取溶剂筛选
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摘要
为给进一步萃取精馏分离正丁醇-异丁醇提供参考依据,建立了单级循环汽液平衡装置,测定了正丁醇-异丁醇的汽液平衡(VLE)数据,用最小方差法(LVM)关联模拟,用Van Ness-Mrazek法验证了热力学一致性。采用UNIFAC预测法基础上的气相色谱实验法进行最佳萃取溶剂筛选,选择一组萃取溶剂,分别测定溶剂与正丁醇-异丁醇之间的汽液平衡数据,比较相对挥发度和选择度,最终选择甘油作为最佳萃取溶剂。通过验证实验,可得到质量分数为97.42%的正丁醇和99.68%的异丁醇。
In order to provide further reference for extracting, distilling and separating isobutanol and butanol,the paper sets up a single-level vapor-liquid equilibrium device, measures the vapor-liquid equilibrium(VLE)data, and uses the least variance method(LVM) to correlate and simulate it and tests the thermodynamic consistency by Van Ness-Mrazek method. The candidate solvents are generated by UNIFAC prediction method, and the VLE data between butanol- isobutanol and extracting solvent is measured by gas chromatography. By comparison of relative volatility and selection, Glycerin is selected as the best solvent.The purity of isobutanol and butanol could be reached up to 97.42% and 99.68% respectively in the confirmatory experiment.
In order to provide further reference for extracting, distilling and separating isobutanol and butanol,the paper sets up a single-level vapor-liquid equilibrium device, measures the vapor-liquid equilibrium(VLE)data, and uses the least variance method(LVM) to correlate and simulate it and tests the thermodynamic consistency by Van Ness-Mrazek method. The candidate solvents are generated by UNIFAC prediction method, and the VLE data between butanol- isobutanol and extracting solvent is measured by gas chromatography. By comparison of relative volatility and selection, Glycerin is selected as the best solvent.The purity of isobutanol and butanol could be reached up to 97.42% and 99.68% respectively in the confirmatory experiment.
引文
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[5]郭天民.多元汽-液平衡和精馏[M].北京:化学工业出版社,1983:200-203.
[6]杨振生,李春利,吴锦元.萃取精馏法分离环己烷-环己烯-苯物系的新溶剂选择方法[J].石油化工,2001,30(4):285-288.
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[8]陈琦,顾正桂,管小伟.醋酸与醋酸叔丁酯的汽液平衡数据测定及分离[J].计算机与应用化学,2008,25(5):576-578.
[9]宋浩,顾正桂.萃取精馏提取高纯度丙醛的模拟及实验研究[J].化学工程,2011,39(3):1-3.
[10]陈琦,顾正桂.共沸蒸馏液液分层器和回流罐结合的分离回流装置:CN,201101900[P].2008-08-20.
[2]程佳,蒋春波.异丁醇生产技术现状及市场分析[J].化学工业,2007,25(10):28-31.
[3]原宇航,张春雷,罗鸽,等.一种甲基丙烯醛加氢生产异丁醇的分离提纯方法:CN,101260025A[P].2008-09-10.
[4]顾正桂,林军,马振叶,等.二氯苯与二苯胺体系汽液平衡数据测定及关联[J].化学工程,2009,37(6):52-54,58.
[5]郭天民.多元汽-液平衡和精馏[M].北京:化学工业出版社,1983:200-203.
[6]杨振生,李春利,吴锦元.萃取精馏法分离环己烷-环己烯-苯物系的新溶剂选择方法[J].石油化工,2001,30(4):285-288.
[7]胡兴兰,周荣琪.醋酸-水萃取精馏溶剂的筛选[J].化学试剂,2009,31(8):643-645.
[8]陈琦,顾正桂,管小伟.醋酸与醋酸叔丁酯的汽液平衡数据测定及分离[J].计算机与应用化学,2008,25(5):576-578.
[9]宋浩,顾正桂.萃取精馏提取高纯度丙醛的模拟及实验研究[J].化学工程,2011,39(3):1-3.
[10]陈琦,顾正桂.共沸蒸馏液液分层器和回流罐结合的分离回流装置:CN,201101900[P].2008-08-20.