Abstract:

Hexane-HMDS（hexamethyl disilazane）, MM(hexamethyl disiloxane)-HMDS and hexane-MM binary systems isobaric（101.30 kPa）vapor-liquid equilibrium (VLE) data were measured with a modified Rose still.The saturated vapor pressures of HMDS and hexane at experimental temperatures were measured with the static method, and the Antoine parameters of HMDS were regressed.The experimental data were tested with the area test method and the VLE data were shown to meet thermodynamic consistency.Margules, van Laar, Wilson and NRTL models were used to correlate the experimental data.The results showed that the system of hexane-MM had higher average relative deviations, and the calculated data from four models agreed well with the experimental data of hexane-HMDS and MM-HMDS systems.

摘要：

利用改进的Rose釜沸点仪，测定了常压下正己烷-六甲基二硅氮烷(HMDS)、六甲基二硅氧烷(MM)-HMDS、正己烷-MM的等压汽液平衡数据。用静态法测出了实验温度下HMDS和正己烷的饱和蒸气压，并回归出了HMDS的Antoine常数。用面积检验法对每个体系进行了热力学一致性校验，结果符合热力学一致性要求，并用Margules、van Laar、Wilson和NRTL 4种方程模型对汽液平衡数据进行了关联。结果表明，正己烷-MM体系的平均相对偏差较大，对正己烷-HMDS和MM-HMDS体系，其最佳配偶参数能较好地满足系统。