Traditional Culture Encyclopedia - Traditional festivals - Preparation method of benzaldehyde
Preparation method of benzaldehyde
Add 90 ml of sodium hypochlorite solution with 5% available chlorine into a 500mL three-necked bottle, adjust the pH value to 9~ 10 with sulfuric acid and potassium carbonate, add 4.5g 10 tetrabutylammonium bromide solution, 3.0mL benzyl alcohol and 75mL dichloromethane, and stir at room temperature for 2 hours. Separate the organic phase, extract the water phase with dichloromethane for 3-4 times, and combine the extract and the organic phase. Drying with anhydrous magnesium sulfate, evaporating the solvent, distilling under reduced pressure, and collecting the fraction at 60-62℃/ 1333 Pa, namely benzaldehyde.
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