反应详情

温度

215 °C

A glass flask having an inner volume of 3 liters was fitted with a thermometer, a stirrer, and a water separator. In this reactor, 240 g of a solution containing 120 g of maleic anhydride in xylene was placed. Then, a solution containing 220 g of dodecylamine in 1880 g of xylene was added gradually and piecemeal over a period of 120 minutes at 40° C. to the reactor. After the addition was completed, the mixture in the reactor and 65.4 g of orthophosphoric acid (purity 89% by weight) added thereto were heated at 215° C. for 1 hour under 4.4 kg/cm2. G to effect reaction. 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 separated by filtration to effect removal of insolubles. The xylene layer was distilled to expel xylene. Consequently, there was obtained 258 g of slightly impure N-dodecyl maleimide. This product was found to have purity of 85.3% by weight, indicating the yield to be 69.9 mol % based on dodecylamine.

1. customA glass flask having
2. customan inner volume of 3 liters was fitted with a thermometer, a stirrer
3. additionwas added gradually and piecemeal over a period of 120 minutes at 40° C. to the reactor
4. additionAfter the addition
5. customreaction
6. customThe resultant reaction mixture
7. temperaturewas cooled to 30° C.
8. washwashed with 400 ml of water
9. customseparated into a water layer
10. customThe xylene layer was separated by filtration
11. customremoval of insolubles
12. distillationThe xylene layer was distilled