Post-treatment process method for preparation of p-fluoronitrobenzene

The invention discloses a post-treatment process method for preparation of p-fluoronitrobenzene, and relates to the technical field of preparation of fluoronitrobenzene. The method comprises the following steps: after fluoridation of potassium fluoride, DMF and parachloronitrobenzene raw materials is completed, directly carrying out solid-liquid separation operation on the reacted materials without solvent distillation and water addition layering operation, rectifying the separated liquid-phase filtrate in a rectifying tower, washing the solid phase for multiple times by using a certain amount of DMF, recycling the washing liquid, finally drying the solid-phase filter cake, and packaging to obtain the product. And the liquid phase is condensed and recycled in the drying process. The whole fluorine-containing nitrobenzene production process is not contacted with water, so that the waste water source is fundamentally eliminated, and the waste water treatment cost is reduced. And after the fluorination is comple