Method used for reductive amination using jet reactor

Abstract

The invention discloses a method used for reductive amination using a jet reactor, and belongs to the field of chemical technology. According to the method, the jet reactor is adopted. The jet reactor comprises a reactor, an ejector, a circulating pump, a concentration device, a heat exchanger, and a mixer. The jet reactor is used for chemical product hydrogenation reduction. According to the method, a mixture containing a catalyst, raw materials, and a target amination product is taken as a dynamic fluid, high speed liquid flow is obtained via injection, and stable turbulent flow is formed at a nozzle, and in addition, negative pressure is formed around the nozzle, entrainment of hydrogen is realized, and gas-liquid-solid complete mixing reaction is realized. After reaction, and obtained product is subjected to condensation separation so as to obtain partially aminated products; a concentrate containing the catalyst and a reduced material are subjected to preheating using the heat exchanger, and mixing using the mixer, and then are delivered into the ejector for circular reaction. The method can be used for obtaining amines via reduction of nitro compounds, nitroso compounds, azo-compounds, azoxy compounds, and hydride azo compound.

Description

technical field [0001] The invention relates to a liquid-phase hydrogenation reductive amination equipment and a process method, belonging to the technical field of chemical process and equipment. Background technique [0002] Amine compounds are important organic chemical raw materials and chemical products, such as: aniline, 4-aminodiphenylamine, etc. There are more than 300 kinds of chemical products and intermediates prepared from them, which are used in dyes, medicines, pesticides, explosives, spices, Rubber vulcanization accelerators are widely used in industries such as rubber vulcanization accelerators, and the development and utilization prospects are very broad. [0003] The catalytic hydrogenation method can make the reaction proceed in a directional manner, with few side reactions, good product quality and high yield, so it is the development direction of amine production. Compounds can be reduced by hydrogenation. At present, the methods for realizing reductiv...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a device and process method for liquid-phase hydrogenation reductive amination using a jet reactor to solve the problems of high energy consumption and low conversion rate during reductive amination in the prior art

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