Production process of quinacridone pigment

The invention discloses a production process of quinacridone pigment, and belongs to the field of pigment production. In the synthesis process of the quinacridone pigment, a quinacridone pigment derivative is added in a ring-closure reaction, the ring-closure reaction of the quinacridone pigment is completed through a tubular reactor, an impinging stream mixer water phase crystallization process is adopted in the precipitation and crystallization process, and superfine pigment primary and secondary particles with uniform particle size distribution are obtained. According to the process, the dosage of polyphosphoric acid is greatly reduced, flammable and explosive organic solvents are not used, no organic VOC (volatile organic compound) is discharged, and an intrinsically safe process is basically realized. 本发明公开了喹吖啶酮颜料的生产工艺，属于颜料生产领域。喹吖啶酮颜料的合成工艺中，在闭环反应中添加喹吖啶酮颜料衍生物，通过管式反应器，完成喹吖啶酮颜料的闭环反应，析出结晶过程采用撞击流混合器水相结晶工艺技术，获得超细及粒径分布均匀的颜料初级次级粒子，在水相介质中完成颜料化转晶，本工艺多聚磷酸用量大量减少，并不使用易燃易爆的有机溶剂，没有有机VOC排放，基本实现趋本质安全化工艺。