Safe production method of nitro-compound

Abstract

The invention provides a production method of nitro-compound. The production method comprises the steps of: continuously feeding a mixed acid solution from a heavy-phase inlet of a first centrifugal extraction separation device of a nitration separation system disclosed by the invention, and continuously feeding a raw material to be nitrified from a light-phase inlet of a final centrifugal extraction separation device at the same time, wherein the reaction temperature inside each centrifugal extraction separation device is controlled at 10-160 DEG C, and the rotating speed of each centrifugal extraction separation device is controlled at 800-2000 r / min; after multi-stage continuous nitration reaction, discharging final coarse nitride from a light-phase outlet of the first centrifugal extraction separation device, and discharging final waste acid from a heavy-phase outlet of the final centrifugal extraction separation device; and carrying out common alkali washing and water washing on the coarse nitride, and distilling the coarse nitride to obtain the refined nitro-compound product. According to the method disclosed by the invention, the nitration reaction is continuously carried out; the device is compact, easy to achieve automatic control, large in operation elasticity, and high in production efficiency; and as the reaction product and the waste acid are separated from each other at the same time inside the same reactor, the contact time of the reaction product and the waste acid is greatly shortened, side reaction is effectively avoided, energy consumption and material consumption are greatly reduced, and the security of the nitration reaction process is fundamentally ensured.

Description

technical field

[0001] The invention belongs to the technical field of synthesizing nitrate-based compounds through nitration reaction of hydrocarbon compounds and nitric acid under the action of an acid catalyst, and specifically relates to a production device and production method for preparing nitro-compounds through nitration reaction. Background technique

[0002] Nitration reaction is a chemical reaction in which nitro groups are introduced into hydrocarbon compounds, especially aromatic hydrocarbon compounds, to generate nitro compounds. Nitro compounds have a wide range of uses. The production of nitro compounds has long been produced by using mixed acid as a nitrating agent. Firstly, the nitration reaction is carried out in the nitration reactor, and then the crude nitration product is separated from the waste acid after nitration, and the crude nitration product is washed with water and alkali to obtain the nitration product. The nitrification reaction can be divi...

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