Crystallization process for producing photoinitiator and product thereof

The invention relates to a crystallization process for photoinitiator production and a product thereof, and the crystallization process comprises the following steps: pre-cooling a photoinitiator solution to a preset temperature value, controlling the difference value between the preset temperature value and the graining temperature to be 0-5 DEG C, adding a seed crystal at the preset temperature, and then cooling and crystallizing at a constant speed to obtain a photoinitiator crystal, the obtained photoinitiator crystals are blocky in morphology, high in hardness, not prone to breakage, concentrated in crystal particle size distribution and large in particle size, and the mass ratio of the obtained crystals with the particle size distribution within the range of 10-30 meshes can reach 80% or above. 本发明涉及一种用于光引发剂生产的结晶工艺及其产品，所述结晶工艺包括：将光引发剂溶液预冷降温至预设温度值，并控制预设温度值与起晶温度的差值为0℃～5℃，并在预设温度下加入晶种，之后匀速降温冷却结晶，得到光引发剂晶体，所得光引发剂晶体的形貌为块状，硬度高、不易破碎，且晶体粒度分布集中，粒度大，所得晶体粒度分布在10目～30目区间的质量占比可达80％以上。