ENDO-METHYLENE HEXAHYDROPHTHALIC ANHYDRIDE AND PRODUCTION METHOD THEREOF

摘要

The present invention belongs to the field of organic chemical synthesis, and discloses hexahydro-3,6-methanophthalic anhydride and a method of producing the same. The method uses maleic anhydride and mixed C 5 s as raw materials, generates Nadic anhydride by absorbing cyclopentadiene with maleic anhydride directly at a temperature of 0-5°C, and crystallizes to obtain a pure product; and a Cu-Ni/ZnO-ZrO 2 or Co-Ni/ZnO-ZrO 2 catalyst is added to the generated Nadic anhydride, carrying out a catalytic hydrogenation reaction in a high-pressure autoclave for 4-6 hours at a temperature of 100-140°C and under a hydrogen pressure of 1-4 MPa, the catalyst is filtered after cooling, and reduced pressure distilling to obtain the hexahydro-3,6-methanophthalic anhydride. Compared with the prior art, the present invention prepares the Nadic anhydride by using mixed C 5 s, an inexpensive by-product of ethylene, as a raw material, and further synthesizes hexahydro-3,6-methanophthalic anhydride while obtaining a chemical raw material de-cyclized C 5 s at the same time, enhances the in-depth processing of mixed C 5 s, and can be used widely in industrial production.