水析结晶提纯碳酸二苯酯的研究  

Purification of diphenyl carbonate by using watering-out crystallization

作　　者：白荣献[1] 张小艳[1] 李金金[1] 王庶[1] 李光兴[1] 

机构地区：[1]华中科技大学化学与化工学院,湖北武汉430074

出　　处：《化学工程》2009年第3期13-15,共3页Chemical Engineering(China)

基　　金：国家高技术研究发展计划资助项目(2004AA32G030);华中科技大学理学基金项目(20061093)

摘　　要：采用水析结晶法对碳酸二苯酯(DPC)的纯化进行了研究。结果表明:DPC在水-乙醇溶剂中的溶解度随温度的升高而增大,因此水析结晶以在较低的温度下(<15.0℃)进行为宜。随水析溶剂质量分数的增加,DPC的收率稍有降低,而所得的DPC的纯度则几乎没有变化,且符合合成聚碳酸酯原料纯度的要求。表明水析结晶法对粗DPC的提纯分离是一种简单、有效的方法,具有集萃取、结晶和洗涤为一体的特点。该方法不易导致晶体包藏母液,有利于清除杂质,可得到较完整的针状晶体。Purification of diphenyl carbonate （DPC） was studied by means of watering-out crystallization. The result shows that the solubility of DPC in water-ethanol solvent increases with the rising of the temperature. So the watering-out crystallization of DPC had better be performed at lower temperature （ 〈 15℃）. The yield of DPC slightly decreases with the increase of water-ethanol solvent, but the purity of DPC is kept almost unchanged, and can meet the demand of polycarbonate synthesis. It indicates that the watering-out crystallization is a simple and effective method for the purification of DPC, and is featured by integration of extraction, crystallization and lavation, which results in few inclusions, less impurity and more perfect crystals.

关 键 词：水析结晶 碳酸二苯酯 提纯 

分 类 号：TQ243.26[化学工程—有机化工]