The Preparation Methods of Benzophenone

  • Author:Kathy
  • Release on :2016-05-19

Device, respectively, in 250 ml flask, four electric mixer, thermometer, dropping funnel and condenser pipe. Install a calcium chloride on the top of the condenser pipe tube, in the drying tube top with a rubber hose connection glass funnel, which is placed in a beaker of water, make the water inside the funnel round mouth from the beaker LCM, in order to absorb hydrogen chloride gas generated in the reaction process.

In four flask into 39 g (0.5 mol) anhydrous benzene, 14 g (0.1 mol) fully trituration of anhydrous aluminum chloride. Placed in the dropping funnel 14 g (0.1 mol) benzoyl chloride. Slowly add benzoyl chloride under stirring reaction too violent. After the benzoyl chloride and, on the water bath heating to 50 ℃, until no escape hydrogen chloride. Then put into the reactants. Of the 100 ml water, add l0mL concentrated hydrochloric acid to dissolve the precipitation precipitation. To separate benzene layer, successively with 30 ml water, 30 ml5 % sodium hydroxide and 30 ml water washing. To separate benzene layer, dry with anhydrous magnesium sulfate, atmospheric distillation recycle benzene, vacuum distillation to collect 170 ~ 175 ℃ / 2 kpa distillate, Benzophenone.

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