Abstract

A theoretical and experimental study is performed for liquid–solid phase equilibria in the two-component diphenyl oxide–n-hexadecane system. The results show that this system is eutectic. Two means are chosen for the theoretical study of the system: the Schröder–Le Chatelier equations and the original UNIFAC system. Experimental studies are made via differential thermal analysis on a DSC unit. Results from the theoretical and experimental studies are presented in the form T–x diagrams of the system. The theoretical and experimental data are compared to one another. Each way of calculating is assessed, and recommendations are made for their application. The eutectic coordinates (melting point and composition) are determined experimentally. The following values are determined experimentally for a eutectic melt: the enthalpy of melting; density at 25°C; kinematic viscosity in the temperature range of 25 to 50°C; flash point in an open cup; boiling point, and refractive index in the temperature range of 25 to 40°C. The composition of the eutectic melt can be used in industry as a heat transfer fluid.

中文翻译：

---

氧化二苯-正十六烷体系的相图

摘要

对两组分二苯醚-正十六烷体系中的液相-固相​​平衡进行了理论和实验研究。结果表明该系统是共晶的。为系统的理论研究选择了两种方法：Schröder–Le Chatelier方程和原始的UNIFAC系统。通过差示热分析在DSC单元上进行了实验研究。理论和实验研究的结果以T – x的形式表示系统图。将理论和实验数据相互比较。评估了每种计算方式，并针对其应用提出了建议。通过实验确定共晶坐标（熔点和组成）。对于共晶熔体，通过实验确定以下值：熔解焓；25°C时的密度；运动粘度在25至50°C的温度范围内; 敞口杯中的闪点；沸点和25至40°C温度范围内的折射率。共晶熔体的组成可以在工业上用作传热流体。