反应详情

温度

150 °C

A glass flask having an inner volume of 3 liters was fitted with a theremometer, a stirrer and a water separater. This reactor was charged with 240 g of a xylene solution containing 120 g of maleic anhydride. Then, a solution of 220 g of dodecylamine in 1880 g of xylene was added thereto gradually and piecemeal at 40° C. over a period of 120 minutes. After the addition was completed, the resultant mixture and 65.4 g of ortho-phosphoric acid (purity 89% by weight), 0.672 g of p-methoxyphenol, and 0.05 g of zinc acetate added thereto were heated at 150° C. for four hours to effect reaction. Thereafter, the resultant reaction mixture was cooled to 30° C., washed with 400 ml of water, and separated into a water layer and a xylene layer. The xylene layer was filtered to effect removal of insolubles. The xylene layer now free from insolubles was distilled to expel xylene. Consequently there was obtained 260 g of slightly impure N-dodecyl maleimide. It was found to have purity of 91.2% by weight, indicating the yield thereof to be 75.3 mol % based on dodecylamine.

1. customA glass flask having
2. customan inner volume of 3 liters was fitted with a theremometer, a stirrer
3. additionAfter the addition
4. customreaction
5. customThereafter, the resultant reaction mixture
6. temperaturewas cooled to 30° C.
7. washwashed with 400 ml of water
8. customseparated into a water layer
9. filtrationThe xylene layer was filtered
10. customremoval of insolubles
11. distillationThe xylene layer now free from insolubles was distilled