Method for synthesizing ketoxime

A method for synthesizing a ketoxime, comprising:

• performing a reaction on a ketone, ammonia and hydrogen peroxide by using a titanium-silicon molecular sieve as a catalyst to obtain the ketoxime in a system of an aqueous carbonate solution;
• wherein a reaction progress is judged and an optimal reaction ratio is determined by a real-time monitoring of a pH value in a reaction system during the reaction, and
• wherein steps are as follows:
• gradually introducing a predetermined amount of the ammonia and a non-predetermined amount of the hydrogen peroxide into a three-phase mixed system composed of the ketone, the aqueous carbonate solution and the titanium-silicon molecular sieve, and monitoring the pH value in the reaction system by using an online pH meter;
• when the pH value returns to an initial pH of the aqueous carbonate solution, stopping dropwise adding the hydrogen peroxide, and after the reaction is completed, putting aside the reaction system for layering, wherein a product extracted from an upper layer of the reaction system is the ketoxime, and a lower layer of the reaction system is an aqueous phase.