申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:US20200031841A1
公开(公告)日:2020-01-30
An object of the present invention is to provide a method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride, which is capable of stably achieving a high dehydration rate. The method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride of the present invention is a method for producing 1,2,4,5-cyclohexanetetracarboxylic dianhydride by subjecting 1,2,4,5-cyclohexanetetracarboxylic acid to a dehydration reaction in a slurry state in the presence of a dehydrating agent, wherein an average particle size of the 1,2,4,5-cyclohexanetetracarboxylic acid is 20 μm or more.
本发明的目的是提供一种生产1,2,4,5-环己烷四甲酸二酐的方法,该方法能够稳定地实现高脱水速率。本发明的生产1,2,4,5-环己烷四甲酸二酐的方法是通过使1,2,4,5-环己烷四甲酸在存在脱水剂的情况下处于浆状状态进行脱水反应来生产1,2,4,5-环己烷四甲酸二酐的方法,其中1,2,4,5-环己烷四甲酸的平均粒径为20微米或更大。