丁酮肟-丁酮、丁酮肟-正己烷体系导热系数的测定

摘要

The thermal conductivity is an important parameter in the design of chemical engineering processes. In this study, a new transient hot wire apparatus for measuring thermal conductivity of liquid was established. The apparatus consists of a thermal conductivity cell with a platinum heating wire, a thermal bath, a circuit system and a data acquisition system. After calibrating the effective length of the platinum wire, the deviations between the experimental data and literature data were found to be within 1%. In order to provide essential data for the process design of the methyl ethyl ketoxime production and the development of its downstream products, the thermal conductivity of methyl ethyl ketoxime-methyl ethyl ketone system and methyl ethyl ketoxime-n-hexane system were measured by the established apparatus in the temperature range of 288~328 K at atmospheric pressure. The experimental data of heat conductivities were correlated as the function of composition and temperature, and the absolute average deviation between the experimental data and the calculated results of the correlated function are 0.13% and 0.36%, respectively.%导热系数是重要的化工基础数据.研究者新建了一套瞬态热线法测量液体导热系数的装置,该装置由热导池、恒温系统、电路系统、数据采集系统组成,经标定有效铂丝长度后,实验值与文献值平均偏差在1%以内.为了给丁酮肟合成及丁酮肟下游产品开发提供基础数据,使用该装置测定了丁酮肟-丁酮、丁酮肟-正己烷体系在常压、288 ～328 K下的导热系数,并将实验数据拟合成关于组成和温度的方程,拟合相对平均偏差分别为0.13%、0.36%.