| abstract |
Endo-methylene hexahydrophthalic anhydride and production method thereof are disclosed. The endo-methylene hexahydrophthalic anhydride is produced by the following steps: gradually adding maleic anhydride to mixed C5, reacting at 0-5℃ under stirring till no cyclopentadiene detected by gas chromatography, centrifugating to separate the product, vaporizing, compressing and condensing the liquid to obtain decyclized C5 containing isoprene and m-pentadiene as main components, crystallizing solid to obtain himic anhydride; adding Cu-Ni/ZnO-ZrO2 or Co-Ni/ZnO-ZrO2 catalyst, hydrogenating for 4-6 h at 100-140℃ and hydrogen pressure of 1-4 MPa in autoclave, cooling, filtrating to remove catalyst, distilling under reduced pressure to obtain endo-methylene hexahydrophthalic anhydride. |