The liquid–liquid equilibrium (LLE) curves for 2-phenylethan-1-ol (2-phenylethanol, 2PhEtOH) + octane, + decane, + dodecane, + tetradecane or + 2,2,4-trimethylpentane have been determined by a method of turbidimetry using a laser scattering technique. Experimental results reveal that the systems are characterized by an upper critical solution temperature (UCST), which increases linearly with the number of C atoms of the n-alkane. In addition, the LLE curves have a rather horizontal top and become skewed to higher mole fractions of the n-alkane, when its size increases. For a given n-alkane, UCST decreases as follows: phenol > phenylmethanol > 2-PhEtOH, indicating that dipolar interactions decrease in the same sequence. This has been ascribed to a weakening in the same order of the proximity effects between the phenyl and OH groups of the aromatic alkanols. DISQUAC interaction parameters for OH/aliphatic and OH/aromatic contacts in the investigated systems are reported. Phenol, or phenylmethanol or 2-PhEtOH, + n-alkane mixtures only differ by the first dispersive Gibbs energy interaction parameter for the (OH/aliphatic) contact.

中文翻译：

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2-苯基乙-1-醇+烷烃体系的液-液平衡

用一种方法测定了2-苯基乙-1-醇（2-苯基乙醇，2PhEtOH）+辛烷，+癸烷，+十二烷，+十四烷或+ 2,2,4-三甲基戊烷的液-液平衡（LLE）曲线使用激光散射技术进行比浊法分析。实验结果表明，该系统的特征在于较高的临界溶液温度（UCST），该温度随正构烷烃C原子数的增加而线性增加。另外，当LLE曲线的尺寸增加时，其LLE曲线具有相当水平的顶部并且偏向正构烷烃的较高摩尔分数。对于给定的n-烷烃，UCST降低如下：苯酚>苯基甲醇> 2-PhEtOH，表明偶极相互作用按相同顺序降低。这归因于芳族链烷醇的苯基和OH基团以相同顺序的邻近效应减弱。报告了所研究系统中OH /脂肪族和OH /芳香族接触的DISQUAC相互作用参数。苯酚或苯甲醇或2-PhEtOH +正构烷烃混合物的区别仅在于（OH /脂肪族）接触的第一个分散Gibbs能量相互作用参数。