Continuous cyaniding method in benzyl cyanide production

The invention relates to the technical field of organic chemical production, in particular to the technical field of production of benzyl cyanide, and discloses a continuous cyaniding method in benzyl cyanide production. The method comprises the following steps that raw materials benzyl chloride and a phase transfer catalyst are mixed in proportion, the mixture and a raw material sodium cyanide solution are continuously fed into a reaction tower together, the reaction tower is a plate tower, and the temperature of a tower plate is controlled, so that the cyaniding reaction in the tower is continuously carried out; reaction liquid is continuously extracted out of a tower still, the reaction liquid enters a continuous centrifugal separation device after being cooled, the products benzyl cyanide oil phase and brine phase are separated, separated brine enters a waste water treatment section, and the separated oil phase is crude benzyl cyanide. The method has the advantages of being high in production efficiency a