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介绍了碳酸丙烯酯的理化性质、用途和生产的主要工艺方法,通过对原有釜式间歇蒸馏碳酸丙烯酯产品纯度不高的原因分析,确定了采用薄膜蒸发器代替蒸馏釜的精馏改进方法,使碳酸丙烯酯产品纯度由99.0%提高到了99.5%,碳酸丙烯酯产品收率由85.3%提高到了87.6%,同时改进后的精馏方法使操作温度比采用间歇蒸馏工艺时有所降低,生产装置能耗物耗都有所降低,总体改造效果明显。
The physical and chemical properties of propylene carbonate, its application and the main process of production are introduced. By analyzing the reasons why the purity of propylene carbonate in batch-type distillation tank is not high, an improved method of distillation using thin-film evaporator instead of distillation still , The purity of propylene carbonate product increased from 99.0% to 99.5%, the yield of propylene carbonate product increased from 85.3% to 87.6%, while the improved rectification method reduced the operating temperature lower than that of batch distillation process. The production of Equipment consumption and consumption have been reduced, the overall transformation effect is obvious.