Acta Chimica Sinica ›› 1991, Vol. 49 ›› Issue (6): 557-560. Previous Articles     Next Articles

Original Articles

醇类在芳烃溶剂中的缔合溶液热力学

裘利言;郑国康;周效贤;陈武锋   

  1. 兰州大学化学系
  • 出版日期:1991-06-15 发布日期:1991-06-15

Thermodynamics study on self-association of alcohols in aromatics by freezing point depression

QIU LIYAN;ZHENG GUOKANG;ZHOU XIAOXIAN;CHEN WUFENG   

  • Online:1991-06-15 Published:1991-06-15

The solvent activity coefficients gB of binary mixtures have been measured for C1 to C4 alcs. in benzene and in p-xylene by f.p. depression. The data was treated with Wiehe-Bagley association model combining with a Hildebrand-Scatchard term. The association constants KA and infinite dilution activity coefficients gA?of alcs. have been evaluated. The KA of alcs. in each solvent follow the order, methanol > ethanol > n-propanol > n-butanol; n-propanol > isopropanol; n-butanol > isobutanol > tert-butanol ?sec-butanol. And the value of KA of each alcohol in p-xylene is greater than that in benzene. The gA?of alcs. in each solvent decrease in the following order, methanol > ethanol > n-propanol > n-butanol; n-propanol > isobutanol. And the value of gA?of each alcohol in benzene is greater than that in p-xylene.

Key words: ETHANOL, BENZENE, METHANOL, DIMETHYLBENZENE, FREEZING POINTS, BUTANOL, ACTIVITY, SOLVENT EFFECT, ENTROPY, ASSOCIATION

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