本研究採用總壓法量測1,2,4 三甲基苯 (1,2,4-trimethyl benzene)+ 正己烷 (n-hexane)、正庚烷 (n-heptane)、正辛烷 (n-octane)、正壬烷 (n-nonane)、苯 (benzene)，或甲苯 (toluene)共6 組雙成分混合物系統在363.15 K、393.15 K、433.15 K 與473.15 K 下的恆溫汽液相平衡數據，這些系統均無共沸物產生。
本研究亦收集乙基苯 ( ethylbenzene ) + 環丁碸 ( sulfolane )、正己烷 ( n-hexane )、正庚烷 ( n-heptane )、正辛烷 ( n-octane )、正壬烷 ( n-nonane )、苯 ( benzene )、甲苯 ( toluene )、對二甲苯 ( p-xylene )、鄰二甲苯 ( o-xylene )、間二甲苯 ( m-xylene )，或1,2,4-三甲基苯 ( 1,2,4-trimethyl benzene )共十一組雙成分混合物系統之汽液相平衡文獻數據。本研究中採用NRTL-HOC 模式關聯上列之汽液平衡數據，並求得17 組雙成分系統的最適化參數值，計算結果顯示NRTL-HOC 模式可準確描述這些混合物的汽液相平衡行為。

In the present study, the total pressure method was used to measure the isothermal vapor-liquid equilibrium (VLE) data for the binary systems of 1,2,4-trimethyl benzene + n-hexane, n-heptane, n-octane, n-nonane, benzene, or toluene at 363.15 K, 393.15 K, 433.15 K and 473.15 K. The experimental results exhibit no azeotropic behavior. Additionally, the VLE data of 11 binary systems of ethylbenzene + sulfollane, n-hexane, nheptane, n-octane, n-nonane, benzene, toluene, p-xylene, o-xylene, mxylene, or 1,2,4-trimethyl benzene are collected from open literature.The NRTL-HOC model was applied used to correlate all the VLE data and determine the optimal values of model parameters for 17 binary systems. The calculated results reveal that the NRTL-HOC model can accurately represent the VLE behavior for these investigate systems.

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