Production method of tris (2,4,6-tribromophenoxy) cyanurate

The invention relates to a production method of flame retardant tris (2,4,6-tribromophenoxy) cyanurate, belonging to the production field of the flame retardant. The production method comprises the following steps: dissolving phenol into a chlorobenzene solvent; then adding anhydrous aluminum trichloride as a catalyst; adding cyanuric chloride; reacting cyanuric chloride with phenol to synthesize the tris(2,4,6-tribromophenoxy)cyanurate; cooling and adding water; using bromine as a brominating agent; and brominating, washing, distilling, crystallizing, performing centrifugal separation and drying to obtain the finished product tris (2,4,6-tribromophenoxy) cyanurate. According to the production method provided by the invention, problems such as tribromophenol synthesis, purification and drying are avoided; the reaction is carried out in one reaction kettle; the treatment for purifying, separating and drying the intermediate product is omitted; the process is simplified and the energy consumption is reduced.