Crystallization process for producing photoinitiator and product thereof

The invention relates to a crystallization process for producing a photoinitiator and a product thereof. The crystallization process comprises three steps of cooling and graining, heating and crystallizing and cooling and crystallizing at a constant speed. According to the crystallization process, the size and morphology of the crystal obtained by crystallization are adjusted through the steps of cooling crystallization and heating crystallization, and then constant-speed cooling crystallization is carried out at a specific cooling rate, so that the photoinitiator crystal with concentrated particle size distribution can be obtained; compared with a photoinitiator crystal which is obtained through a traditional direct cooling crystallization process and has a flaky and fragile microstructure, the photoinitiator crystal obtained through the crystallization process fully grows in the third dimension direction, the microstructure of the photoinitiator crystal is blocky, and the photoinitiator crystal is high in t