PRODUCTION OF TEREPHTHALOYL DICHLORIDE AND ISOPHTHALOYL DICHLORIDE

摘要

PURPOSE: To obtain the title compounds in high yield through reaction under mild conditions by chlorination, under ultraviolet light irradiation, using gaseous chlorine, of dimethyl terephthalate or dimethyl isophthalate in chloroform or carbon tetrachloride. ;CONSTITUTION: The objective compound can be obtained by chlorination, with gaseous chlorine, under ultraviolet light irradiation using a fluorescent lamp or mercury lamp, of dimethyl terephthalate or dimethyl isophthalate in chloroform or carbon tetrachloride or their mixture. With this method, in addition to being capable of avoiding all of the problems due to sublimed matter deposition, the present compounds can be obtained in high purity in an easy operation at relatively low reaction temperatures. These compounds are useful as raw materials for fibers and resins, etc.;COPYRIGHT: (C)1993,JPO&Japio