Crystallization method of 1, 3-cyclohexanedione

The invention discloses a crystallization method of 1, 3-cyclohexanedione, which belongs to the technical field of crystallization, and comprises the following steps: adding a part of protonic acid into a crystallization kettle in advance, stirring and cooling; rapidly and uniformly mixing the residual protonic acid with the 1, 3-cyclohexanedione sodium salt aqueous solution in a static mixer; finally, injecting the mixed material liquid into a crystallization kettle with protonic acid, cooling, growing crystals, and centrifugally drying; most protonic acid and a sodium salt aqueous solution are mixed through the static mixer, so that the production efficiency is improved; the materials are rapidly mixed, and the mixed material liquid is directly injected into the residual hydrochloric acid, so that the 1, 3-cyclohexanedione is prevented from staying in an unstable pH region for a long time, and the generation of impurities is inhibited; the method is high in crystallization efficiency, high in crystallizatio