为获得工业操作温度下甲基异丁基甲酮萃取高浓煤化工含酚废水中酚类物质及溶剂回收的过程模拟和设计基础数据，测定了在常压下、70℃时甲基异丁基甲酮 － 苯酚 －邻苯二酚 － 水四元体系的液液相平衡数据，并用 Hand 方程和 Othmer-Tobias 方程验证了数据一致性． 文中还利用 NRTL 和 UNIQUAC 模型对所测实验数据进行热力学关联，采用模拟软件回归得到二元交互作用参数． 结果表明，两种模型关联计算得到的计算值与实验值吻合良好，模型计算的相对均方根偏差均小于 0. 02，说明两个模型回归得到的二元交互作用参数均能对实验数据进行精确预测． 因此无论是从防堵塞还是从提高萃取效率角度，甲基异丁基甲酮在较高温度下的萃取应用均具有很好的工业价值．

In order to obtain the basic data of the process simulation and design of both the extraction of the phenolic compounds from the highly-concentrated phenolic wastewater in coal chemical industry by using methyl isobutyl ke- tone (MIBK) and the corresponding solvent recycling at an industrial operating temperature,the liquid-liquid equilibrium (LLE) data of a MIBK-phenol-catechol-water quaternary system were measured at 70 ℃ under the atmospheric pressure,and the reliability of the LLE data was ascertained by using the Hand and Othmer-Tobias equations.Moreover,the experimental data were thermodynamically correlated by adopting the NRTL and UNIQUAC models,and binary interaction parameters were calculated by using simulation software.The results show that the calculated data based on the NRTL and UNIQUAC models accord well with the measured data,and the root-mean-square-deviations (RMSD) of the two models are less than 0. 02,which means that the binary inte- raction parameters obtained through the two models can be used to precisely predict the LLE data.Therefore,it can be concluded that the MIBK extraction at high temperatures is of good practical value in industry from the per- spectives of anti-blockage and extraction efficiency.