A kind of hydrogenation reactor and hydrogenation method for producing hydrogen peroxide by anthraquinone method

Abstract

The invention discloses a hydrogenation reactor and method for producing hydrogen peroxide through an anthraquinone method. The anthraquinone hydrogenation reactor comprises a series fixed bed reactorand upflow-type tubular reactors, and working liquid and hydrogen sequentially pass through the fixed bed reactor and the tubular reactors to be subjected to a liquid phase hydrogenation reaction. Through the hydrogenation reactor and method for producing the hydrogen peroxide through the anthraquinone method, the anthraquinone hydrogenation reaction rate can be effectively increased, the anthraquinone hydrogenation reaction efficiency can be effectively improved, the uniformity of the reaction process is maintained, and a side reaction product is effectively controlled.

Description

technical field [0001] The invention belongs to a hydrogen peroxide production process, in particular to a hydrogenation reactor and a hydrogenation method for producing hydrogen peroxide by an anthraquinone method. Background technique [0002] The anthraquinone hydrogenation reactor is generally a conventional fixed-bed hydrogenation reactor, and the working fluid and hydrogen can be mixed or not mixed into the hydrogenation reactor. The height-to-diameter ratio of the anthraquinone hydrogenation reactor is generally 1.0 to 12.0 (the one with the larger height-to-diameter ratio is a tubular reactor). The fixed-bed hydrogenation reactor in the anthraquinone hydrogenation process has the following problems: (1) The dispersion state of hydrogen in the working fluid is unstable. It is easy to diffuse upward and escape to the top of the reactor, and accumulate in the top space of the reactor. On the one hand, the hydrogenation reaction efficiency is reduced, and the ideal hydr...

AI Technical Summary

Problems solved by technology

The fixed-bed hydrogenation reactor in the anthraquinone hydrogenation process has the following problems: (1) The dispersion state of hydrogen in the working fluid is unstable. It is easy to diffuse upward and escape to the top of the reactor, and accumulate in the top space of the reactor. On the one hand, the hydrogenation reaction efficiency is reduced, and the ideal hydrogenation effect cannot be achieved. On the other hand, the gas phase space at the top of the reactor is hydrogen and hydrocarbon vapor. In addition, the distribution of hydrogen is more up than down, resulting in more reactions concentrated on the upper part of the catalyst bed, so that the upper part of the catalyst bed is prone to excessive hydrogenation reaction and the lower part of the bed is not fully reacted; ( 2) In the process of anthraquinone hydrogenation reaction, in order to ensure the reaction pressure and control the discharge of tail gas, the long-term hydrogenation reaction will form the accumulation of inert gas, which will reduce the partial pressure of hydrogen, thereby inhibiting the reactivity, and a large amount of tail gas will be released Exhaust will solve this problem, but it will cause a waste of hydrogen resources; (3) During the hydrogenation of anthraquinone, hydrogen is in the continuous phase, and the working fluid is in the dispersed phase, so there will be uneven distribution of the working fluid on the surface of the catalyst , Locally more liquid areas and less liquid areas, so that the hydrogenation process is very uneven, there are areas of insufficient hydrogenation of anthraquinone and excess hydrogenation, when the hydrogenation of anthraquinone is insufficient, the reaction efficiency will be reduced, and when the hydrogenation is excessive, more side reactions will occur

It can be seen that this method does not solve the safety problems of the accumulation of inert gas in the bed and the gas phase space at the top of the reactor.

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