反应详情

In a 1 liter-glass flask equipped with a 500 W moderate-pressure mercury lamp, 100 g (1.02 M) of maleic anhydride and 1 kg of ethyl acetate were placed and mixed to provide a homogeneous solution. Under stirring in an agron atmosphere, the solution was irradiated with light by using the mercury lamp for 8 hours at 20° C. to precipitate a crystal. After the reaction, the crystal was recovered by filtration to obtain 3.3 g of cyclobutanetetracarboxylic dianhydride (100% trans form).

1. additionmixed
2. customto provide a homogeneous solution
3. customthe solution was irradiated with light
4. customfor 8 hours
5. customat 20° C.
6. customto precipitate a crystal
7. customAfter the reaction
8. filtrationthe crystal was recovered by filtration