Benzophenone synthesis production line

Abstract

The invention discloses a benzophenone synthesis production line. The production line comprises a synthesis reaction kettle, an impurity separation device, a desolvation tank, a rectification device and a slicing mechanism; the material outlet of the synthesis reaction kettle is communicated to the impurity separation device, the material outlet of the impurity separation device is communicated tothe material inlet of the desolvation tank, the top gas outlet of the desolvation tank is communicated to the inlet of a benzene recovery device, and the bottom material outlet of the desolvation tank is communicated to the rectification device; and rectified molten benzophenone is pumped from a material outlet at the bottom of the rectification tank (4.1) into the feeding tube (5.3) of the slicing device, and is sliced. The benzophenone synthesis production line effectively improves the reaction efficiency, reduces the cost and reduces the emission.

Description

technical field [0001] The invention relates to a benzophenone synthesis production line. Background technique [0002] At present, benzophenone is an important intermediate in organic synthesis, widely used in organic coatings, dyes, adhesives, inks, plastics, medicine, daily chemicals, spices, food, pesticides and electronic chemicals and other fields. Used as a free radical photoinitiator and a UV absorber for polymer materials, it can be used to make photosensitive coatings and photosensitive resin plates. It is commonly used in the pharmaceutical industry to produce dicyclohexyl piperidine, benzotropine hydrobromide and diphenhydramine hydrochloride. This product is also a styrene polymerization inhibitor and fragrance fixative, which can impart a sweet smell to fragrances. It is particularly powerful in the development of many perfumes and soap derivatives, especially in radiation-cured coatings and papermaking. Xylenone can also be widely used in the food processing...

AI Technical Summary

Problems solved by technology

[0004] ①Tail gas treatment is unfavorable. In conventional production, the tail gas is discharged after simple lye absorption and filtration, which not only affects the environment, but also does not absorb and utilize benzene in the tail gas, which is not conducive to reducing production costs;

[0005] ② Poor removal of impurities. The main raw materials for the synthesis of benzophenone are benzene and benzoyl chloride, supplemented by various catalysts for catalytic synthesis. After the synthesis, it needs to be pickled, that is, acidic and alkaline substances are added to remove Miscellaneous, then use the characteristics that benzophenone is not miscible with acid and alkali solutions, and separate the impurities dissolved in acidic and alkaline solutions after standing and stratifying; but under the conventional spraying method, the pickling reaction effect is not good better, thus affecting the purity of the product; at the same time, three conventional impurity separation devices need to be cascaded to add acidic solution, alkaline solution and pure water for cleaning, which not only increases the input cost, but also takes up a large area. The land area is not conducive to large-scale industrial application;

[0006] ③ The benzene raw material, one of the main raw materials for synthesis, is not recycled, thereby increasing the manufacturing cost;

[0007] ④The conventional distillation device only uses the rubber plate mixing method to promote the mixture to be heated and vaporized evenly. Due to the huge amount of materials in the rectification tank in the process of large-scale industrial production at one time, the mixing and heating cannot achieve the expected effect, resulting in Some impurity components failed to gasify, affecting product purity;

Images