2,4-及2,6-二硝基甲苯乙醇(硫酸)体系相图的研究

Phase Diagram of a Tertiary Mixture Composed of 2,4-DNT,2,6-DNT and Ethanol(Sulphuric Acid)

首次研究并制作出2,4 二硝基甲苯、2,6 二硝基甲苯与乙醇或硫酸的二固一液三组分体系在不同温度下的相图。由相图得出,为析出尽量多的2,6 DNT,以乙醇作溶剂时温度高些有利,而以硫酸作溶剂时,温度低些有利。

Phase diagram of a tertiary mixture composed of two solid components (2,4-DNT and 2,6-DNT) and one liquid component(ethanol or sulphuric acid) was first set up by solubility approach. The solubility of both 2,4-DNT and 2,6-DNT in ethanol or sulphuric acid,and the cocrystallizing point of the tertiary mixture were determined. From the experimental results,it is concluded that in order to precipatate more 2,6-DNT,the crystallization process should be carried out at higher temperature for solvent of ethanol,but at lower temperature for solvent of sulphuric acid.