Реакция #4990

Уравнение реакции

methyl methacrylate

phenothiazine

→

Butyl Methacrylate

Растворители

1-butanol

Условия реакции

Обработка

1. 1
   workup.ADDITIONcontaining a 5
2. 2
   Другоеequipped with an agitatior
3. 3
   workup.DISTILLATIONthermocouple, and a 10-tray Oldershaw fractional distillation column
4. 4
   workup.ADDITIONThirty grams of the heterogeneous zirconium vinylbenzyl acetylacetonate/styrene/divinylbenzene catalyst was added
5. 5
   ТемператураThe mixture was heated
6. 6
   Температураto reflux at atmospheric pressure while an azeotropic mixture of methyl methacrylate and methanol
7. 7
   Другоеwas removed from the upper portion of the fractionating column
8. 8
   Другоеwas 64°-67° C.
9. 9
   Другоеpot was 101°-107° C

Методика

Two hundred six grams of a reaction mix containing a 5:1 mole ratio of methyl methacrylate, 1-butanol, and 100 ppm phenothiazine as inhibitor were added to a 500 ml flask equipped with an agitatior, thermocouple, and a 10-tray Oldershaw fractional distillation column. Thirty grams of the heterogeneous zirconium vinylbenzyl acetylacetonate/styrene/divinylbenzene catalyst was added. The mixture was heated to reflux at atmospheric pressure while an azeotropic mixture of methyl methacrylate and methanol was removed from the upper portion of the fractionating column. The reaction was continued in this manner for 6 hours while the temperature at the column was 64°-67° C. and the temperature in the pot was 101°-107° C. Gas liquid chromatography (GLC) analysis showed 60% conversion of 1-butanol with a selectivity to butyl methacrylate of 99%.

Источник