α-蒎烯+对伞花烃和β-蒎烯+对伞花烃体系减压汽液平衡数据的测定与关联  

Measurement and Correlation of VLE Data for α-Pinene+p-Cymene and β-Pinene+p-Cymene Systems at Reduced Pressures

作　　者：童张法[1] 王坤[1] 孙丽霞[1] 廖丹葵[1] 韦藤幼[1] 陈小鹏[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《高校化学工程学报》2011年第5期734-739,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(20976031);广西青年科学基金(0640001);广西大学研究生创新项目(105930903088;105931003025)

摘　　要：松节油的主要成分α-蒎烯、β-蒎烯和对伞花烃都是合成香料、医药以及化妆品的重要原料,为了从松节油中分离提纯这些物质,需要测定该体系的汽液平衡数据。利用改进的Dvorak-Boublik汽液双循环平衡釜测定了α-蒎烯+对伞花烃和β-蒎烯+对伞花烃两个二元体系分别在53.3kPa和80.0kPa下的汽液平衡数据,用VanNess提出的点检验法对实验数据进行了热力学一致性检验,结果符合热力学一致性要求。用Wilson、NRTL、UNIQUAC模型对各体系的汽液平衡数据进行关联,并得到相应的模型参数、汽相组成偏差和泡点温度偏差,结果表明计算值与实验值的偏差较小,汽相组成和泡点温度的平均绝对偏差最大值分别为0.0054和0.19℃。实验所测数据及关联结果能够为该体系的精馏设计提供基础数据。α-Pinene, β-pinene and p-cymene, the main components of turpentine oil, are important raw materials used in the synthesis of perfume and in the medicine and cosmetic productions. In order to separate and purify the related components from turpentine oil, the vapour-liquid equilibrium （VLE） data of the system should be determined. The VLE data for binary systems of α-pinene（1）＋ p-cymene（3） and β-pinene（2） ＋ p-cymene（3） were determined respectively at 53.3 kPa and 80.0 kPa in a modified Dvorak-Boublik equilibrium still in this work. The thermodynamical consistency of the determined VLE data was confirmed by the point-to-point method of Van Ness et al. The Wilson, NRTL and UNIQUAC models were applied respectively to correlate the obtained VLE data of the studied systems, and the model parameters together with the deviations of molar fraction in vapour phase and saturation temperature were obtained. The calculations show that the VLE data obtained by experiments agree well with those calculated by the models, the maximum average absolute deviations ofvapour composition and bubble temperature between calculation and experimental measurement are 0.0054 and 0.19℃, respectively. The obtained VLE data of the two binary systems studied and their correlated results can be used as the basic data for designing the distillation process to separate the binary systems studied.

关 键 词：Α-蒎烯 Β-蒎烯 对伞花烃 汽液平衡 

分 类 号：O642.42[理学—物理化学] TQ351.472[理学—化学]