Method for purifying epichlorohydrin containing ether impurities

• Main Authors: JI CHENGXIANG, LIU YAN, JIANG PENG, ZHAN JISHAN, RYU HO-YEON, LIU WEIJIE, ZHAO LIANHAI, GAO YUAN, LI ZUOJIN, ZHU MENGYAO, SUN KANG, LIU YINGJUN, WANG YANG, JANG YOUNG-JIN, SHEN YUANWEI
• Format: Patent
• Language: Chinese; English
• Published: 13.02.2024
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The invention belongs to the technical field of separation, purification and recovery, particularly relates to a method for purifying epichlorohydrin containing ether impurities, and aims to solve the technical problems that the ether impurities in epichlorohydrin cannot be effectively removed, the process is complicated, the energy consumption is high and the like in the conventional purification process. The method comprises the following steps: (1) feeding ethyl isobutyrate and epichlorohydrin containing ether impurities into an azeotropic ether removal tower for rectification, condensing azeotrope output from the tower top, mixing part of the azeotrope with water, feeding the mixture into an azeotropic recovery tower, and feeding a tower kettle material into a heavy component removal tower; (2) rectifying the fed material by the azeotropic recovery tower, condensing the material at the top of the tower, and feeding the condensed material into a split-phase tank; and (3) rectifying the fed material by the