反应详情

温度

135 °C

To a solution of 24.4 g (0.4 mole) ethanolamine in 500 ml ethanol at 60° C. was added 85.2 g (0.3 mole) stearic acid. The ethanol was distilled off until the pot temperature reached 100° C., at which time 300 ml toluene was added, and the water was distilled off as an azeotrope. After 5 hours at 110° C., 6 ml water was recovered in the Stark & Dean trap. Some toluene was removed to raise the pot temperature to 135° C. After an additional 4 hours, another 7 ml water was trapped. The title product (38.5 g) that crystallized on cooling had a melting point of 96°-99° C.

1. distillationThe ethanol was distilled off until the pot temperature
2. customreached 100° C., at which time 300 ml toluene
3. additionwas added
4. distillationthe water was distilled off as an azeotrope
5. custom6 ml water was recovered in the Stark & Dean trap
6. customSome toluene was removed
7. waitAfter an additional 4 hours
8. customThe title product (38.5 g) that crystallized
9. temperatureon cooling