溶解度法分离邻、对硝基氯苯的研究

The Optimum Solvent in the Process of Separating O-nitrochlorobenzene and P-nitrochlorobenzene

研究了溶解度法分离提纯邻、对硝基氯苯的合适溶剂。根据相似相容的原则,选择了极性有机溶剂醇类及其含水溶液,分别测定了邻、对硝基氯苯在不同温度下的溶解度,对所选溶剂的溶解特性进行了比较分析。

Based on the solubility law, the proper solvent was selected to separate and puritythe o - and p - nitrochlorobonzene. The polar organic solvents such as alcohol and their water solutions were used, in which the solubilities of o - and p - nitrochlorobonzene were investigated at different temperature, and the solubility effects were analyzed. As resuit, to o - and p - nitrochlorobonzene, there were more difference at the solubility, which was good at separating the mixture. As the water content increased, the solubilization capacity and the difference of solubilities got decreased, so the mixture＇s separation became more difficult. Considered of the technique and economics, the methanol containing proper ratio of water was selected as the solvent to research the o - and p - nitrochlorobonzenes＇ separation.