化学工学会英文誌 Journal of Chemical Engineering of Japan, vol 23 no 5 pp 621-626(1990)

VLE AT 114.66 AND 127.99 kPa FOR THE SYSTEMS METHYL ACETATE+ETHANOL AND METHYL ACETATE+PROPAN- 1-OL MEASUREMENTS AND PREDICTION
酢酸メチル〜エタノールおよび酢酸メチル〜プロパノール2成分系の114.66，127.99 kPaにおける気液平衡

JUAN ORTEGA AND PEDRO SUSIAL

Catedra de Termodinamica y Fisicoquimica, Escuela Superior de Ingenieros Indus triales. University of Las Palmas of G.C., 35071-Canary Islands, Spain

Key Words: Vapor-Liquid Equilibrium, Methyl Acetate, Ethanol, Propan-1-ol

Isobaric vapor-liquid equilibrium data at two pressures (114.66 and 127.99 kPa) over the entire range of compositions were obtained by using a recirculating equilibrium still for the binary systems formed by methyl acetate and either ethanol or propan-1-ol. In all cases, the systems studied exhibit positive deviations from ideal solution behavior. Methyl acetate 4- ethanol system shows an azeotrope at 114.66 kPa of x=y= 0.954 and T= 333.4 K and x=y= 0.948 and T= 336.7 K at 127.99 kPa. Once thermodynamic consistency was verified, prediction of data by several methods was carried out. Good predictions were obtained for all systems by the UNIFAC and ASOG methods, with mean error of about 5% as expected, but the calculated values for activity coefficients using the modified UNIFAC showed higher deviations.

酢酸メチル〜エタノール系および酢酸メチル〜プロパノール系の114.66ならびに127.99 kPaにおける定圧気液平衡を気相循環型平衡蒸留器で測定し，酢酸メチル〜エタノール系については両圧力下における共沸点を確認した．両系の気液平衡実測データの熱力学的健全性を調べ，また実測値に対して3種の推算式（UNIFAC，ASOGおよび改良UNIFAC）を適用し，推算精度を比較検討した．