Chlorinated sodium phosphate preparation method

The invention discloses a chlorinated sodium phosphate preparation method, which comprises: adding sodium hypochlorite into a sealed reaction kettle with a jacket and a stirring device, adding trisodium phosphate, stirring, adjusting the temperature of the reaction kettle to 40-60 DEGC, adjusting the pressure to 0.3-0.5 MPa, adding potassium dichromate, carrying out a reaction for 20-40 min, introducing cooling water into the jacket, rapidly cooling the reaction solution to a temperature of 20-30 DEGC, transferring in a crystallizer, crystallizing for 2-3 h, filtering, and carrying out air drying on the product at a temperature of 35-50 DEGC C to obtain the finished product. According to the present invention, chlorinated sodium phosphate is prepared by using sodium hypochlorite and trisodium phosphate as the raw materials, and the preparation method has characteristics of easy control, easy operation, simple equipment, stable operation, low investment, low pollution, easy management and extremely high econom