反应详情

温度

150 °C

193 g (1 mol) of trimellitic acid anhydride and 234 g (1.8 mol) of 2-ethylhexanol plus 0.2 g of octylene glycol titanate were placed in a one-liter round flask. The mixture was heated to 150° C. with stirring and the introduction of nitrogen gas, and the splitting off of water begins. Within 4 hours the temperature is raised to 220° C., the distillate is separated by means of a Vigreux column, the top temperature amount to 100° to 150° C. The bath temperature is maintained until the top temperature falls below 80° C. The product has an acid number of 150+10 mg KOH/g. 1.7 mol of 2-ethylhexanol per mol of trimellitic acid is contained in the product.

1. temperatureWithin 4 hours the temperature is raised to 220° C.
2. customthe distillate is separated by means of a Vigreux column
3. customto 100° to 150° C
4. temperatureThe bath temperature is maintained until the top temperature
5. customfalls below 80° C