1results about How to "Realize continuous mass production" patented technology

This invention discloses a high-purity fluorobenzene recovery process in the production of 1,4-bis(4-fluorobenzoyl)benzene, belonging to the field of organic waste liquid recovery technology. Step 1 involves reacting the fluorobenzene waste liquid through a tubular reactor containing anhydrous aluminum chloride particles to obtain dehydrated fluorobenzene waste liquid. The reaction temperature is 5-40℃, the residence time is 60-200 min, and the flow rate of the fluorobenzene waste liquid is 0.1-0.4 m / min. Step 2 involves filtering the dehydrated fluorobenzene waste liquid through a micron filter, then distilling it in a fluorobenzene distillation column. The organic vapor at the top of the column is compressed by a compressor, heat-exchanged by an MVR heat exchanger, condensed, and then refluxed in a reflux tank. High-purity fluorobenzene is obtained from the fluorobenzene distillation column, wherein the fluorobenzene purity is greater than 99.99 wt% and the water content is less than 10 ppm. This invention uses fluorobenzene waste liquid from the production process of 1,4-bis(4-fluorobenzoyl)benzene as raw material. Through reaction dehydration, crystalline aluminum chloride filtration and distillation, it achieves continuous batch production of high-purity fluorobenzene. The process is simple and has low energy consumption.