C_4烃在甲乙酮溶剂体系中的相对挥发度

Relative Volatility of C_4 Hydrocarbon in Methyl Ethyl Ketone Solvent System

用静态法测定不同温度下正丁烷、丁烯 1、顺丁烯 2与甲乙酮溶剂体系的压力～组成数据 ,并与纯C4 烃的饱和蒸汽压曲线比较 ,可以看出 ,甲乙酮溶剂改变了正丁烷与丁烯之间的相对挥发度 ,确定了萃取精馏分离丁烯与丁烷的关键组分为正丁烷与丁烯 1,其相对挥发度为 1.1～ 1.2 .

The static method is used to measure the pressure～composition data for the ternary systems of n butane methyl ethyl ketone,1 butene methyl ethyl ketone and c butene 2 methyl ethyl ketone at different temperatures. The experiment data are compared with the vapor pressure curve of pure C 4 hydrocarbon, which shows that methyl ethyl ketone can change the relative volatility between n butane and 1 butene, which are the key components of separating n butane and 1 butene with extractive distillation. The relative volatility between n butane and 1 butene is 1.1～1.2.