反应详情

温度

160 °C

To a 2-liter four necked flask equipped with Dean Stark apparatus, 218 g of anhydrous pyromellitic acid, 650 g of n-octanol, 0.2 g of titanium tetraisopropoxide and 300 cc of xylene were added and reacted with stirring at 160 degrees C. for 4 hours under nitrogen stream while distilling water. Subsequently, washing by saturated brine and washing by 0.1 N aqueous sodium hydroxide were respectively conducted three times, followed by being dried by anhydrous magnesium sulfate. After magnesium sulfate was filtered, unreacted alcohol was distilled under reduced pressure to obtain 630 g of tetraoctyl pyromellitate. Tetraoctyl pyromellitate, regarded as Comparative Example 3, was similarly measured with respect to the properties.

1. additionwere added
2. customreacted
3. distillationfor 4 hours under nitrogen stream while distilling water
4. washSubsequently, washing by saturated brine
5. washwashing by 0.1 N aqueous sodium hydroxide
6. dry with materialby being dried by anhydrous magnesium sulfate
7. filtrationAfter magnesium sulfate was filtered
8. distillationunreacted alcohol was distilled under reduced pressure