To a beaker add with stirring 25 mL of ethanol, 40 mL of water and 4.4 g of sodium hydroxide, after the solution has cooled down add 12 mL of acetophenone with vigorous stirring. Then start the addition of 13 mL of benzaldehyde with maintaining the temperature below 30°C, stir for additional 3 hours. Filter the mixture and wash with some water. Recrystallize from hot ethanol.
The first mixture of chemicals
Addition of the p-tolualdehyde and stirring for 3h
The pure product