三氟乙酸-丙酮二元系常压汽液平衡研究

摘要用小型平衡釜测定了三氟乙酸(TFA)+丙酮二元体系的常压(101.33 kPa)汽液平衡数据,结果表明三氟乙酸与丙酮形成二元最高共沸物。试验数据通过了面积法热力学一致性检验,利用Wilson和Vanlaar方程对试验数据进行关联和估算,得到了关联活度系数的参数值。汽相摩尔分数与试验值的最大相对偏差均小于0.031 4,用Wilson方程参数推算了共沸点温度为77.62℃,液相丙酮摩尔分数为0.245 9,与试验数据相一致。

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	白鹏
	陈金婷
	张力明

关键词：丙酮三氟乙酸汽液平衡

Abstract： Isobaric vapor-liquid equilibrium data for trifluoroacetic acid(TFA)-acetone system was measured at(101.33 kPa) by using a small equilibrium cell.The results show that TFA and acetone system can form a maximum boiling azeotrope.Thermodynamic consistency of the experimental data was confirmed by means of Herington method.The data was then correlated and calculated by Wilson equation and Vanlaar equation respectively.Average relative deviations between the caculated values and the experimental data of gas mole fraction were all less than(0.031 4).By Wilson equation the azeotropic boiling point for the experimental system was identified to be(77.62 ℃),and the azeotropic mole fraction of acetone is(0.245 9.) These agree well with the experimental data.

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Received 2008-11-15; published 2008-11-15

引用本文:

白鹏;陈金婷;张力明;.三氟乙酸-丙酮二元系常压汽液平衡研究[J]. 化学工业与工程, 2008,25(6): 480-482

BAI Peng~1,CHEN Jin-ting~1,ZHANG Li-ming~2.Isobaric Vapour-Liquid Equilibrium for Binary System of Trifluoroacetic Acid-Acetone[J]. Chemcial Industry and Engineering, 2008,25(6): 480-482