Reaction device and process for preparing cyclohexene by selectively hydrogenating benzene

Abstract

The invention relates to a reaction device and process for preparing cyclohexene by selectively hydrogenating benzene. The reaction device comprises a benzene refiner, a gas-liquid mixer, a static mixed reactor and a separation tank, wherein the benzene refiner is used for refining raw material benzene; the gas-liquid mixer is used for mixing hydrogen with catalyst slurry; the static mixed reactor is taken as a main place of selective hydrogenation; and the separation tank is used for separating a reaction product from a catalyst, wherein the reaction product and the catalyst are conveyed by using the static mixer reactor. A process method for finishing a reaction comprises the following steps of: feeding the raw material benzene into the benzene refiner for refining, and exchanging heat to 100-130 DEG C; feeding the catalyst slurry and the hydrogen into the gas-liquid mixer with a certain pressure according to a certain proportion simultaneously for fully mixing; feeding the refined benzene and the catalyst slurry obtained by mixing into the static mixed reactor; controlling certain reaction temperature, reaction pressure and liquid flow rate; making the materials react in the static mixed reactor to obtain a cyclohexene-containing mixture; and feeding the cyclohexene-containing mixture into the separation tank for separating. Compared with the prior art, the process has the advantages of stable and easily-controlled reaction and high benzene transformation rate and cyclohexene selectivity.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a reaction device and process for preparing cyclohexene through selective hydrogenation of benzene. Background technique [0002] With the development of synthetic fiber and nylon 66 polyamide industry, the selective hydrogenation of benzene to cyclohexene has attracted more and more attention because of its economic, safety and environmental advantages compared with the traditional complete hydrogenation process of benzene. The selective hydrogenation of benzene to cyclohexene is an important research direction in the chemical industry in recent years. The selective hydrogenation of benzene to cyclohexene is a heterogeneous catalytic reaction composed of water, oil, gas and solid. Catalytic reactions take place on the surface of solid catalysts. In order to make the catalytic reaction go smoothly, the reactants benzene and hydrogen must be in contact with the solid catalyst a...

AI Technical Summary

Problems solved by technology

But due to the existence of stirring, its energy consumption is still high; Simultaneously, product cyclohexene and reactant, catalyst exist simultaneously during reaction, and the by-product rate of cyclohexene deep hydrogenation is cyclohexane is higher, and cyclohexene conversion low rate

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