Hydrogenation process for producing hydrogen peroxide by anthraquinone method

Abstract

The invention discloses a hydrogenation process for producing a hydrogen peroxide by an anthraquinone method. The hydrogenation process comprises the following steps that: (1) two reactors are arranged in the hydrogenation process for producing the hydrogen peroxide by the anthraquinone method; a first current of fresh hydrogen and a working liquid serve as a feeding material I and perform hydrogenation in the first reactor; the reacted material is subjected to gas-liquid separation to obtain a gas phase and a liquid phase, wherein part of the liquid phase is recycled back to the first reactor; the rest of the liquid phase is reasonably optimized and modulated; the phenomenon that the reaction hydrogen is deficient or excessive is avoided; the hydrogenation completeness is realized; the liquid phase and the gas phase are mixed to serve as feeding material II and enter the second reactor; (2) a second current of fresh hydrogen and the feeding material II perform the hydrogenation in the second reactor; the reacted material is subjected to the gas-liquid separation to obtain a gas phase and a liquid phase, wherein part of the liquid phase is recycled back to the second reactor, and the rest of the liquid phase enters an oxidation process. According to the process disclosed by the invention, a hydrogenation process is optimized, and meanwhile, side effects are reduced, so that the hydrogenation is more uniform, and the service life of a catalyst is prolonged.

Description

technical field [0001] The invention relates to a hydrogenation method for producing hydrogen peroxide, in particular to a hydrogenation process for producing hydrogen peroxide by an anthraquinone method. Background technique [0002] The production of hydrogen peroxide by the anthraquinone method generally uses 2-ethylanthraquinone (EAQ) as the working carrier, and heavy aromatics (Ar) and trioctyl phosphate (TOP) as the solvent to prepare the working solution, which is hydrogenated, oxidized, extracted and worked Liquid post-treatment and other processes to obtain hydrogen peroxide products. The hydrogenation process refers to the hydrogenation reaction of EAQ in the working solution with hydrogen in the presence of a palladium catalyst to generate 2-ethylhydroanthraquinone (HEAQ). [0003] The existing hydrogen peroxide hydrogenation process produced by the anthraquinone method generally uses a fixed-bed reactor filled with a catalyst, the reaction pressure is generally ...

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Problems solved by technology

The purpose of this method is to accurately control the temperature of the working fluid entering the hydrogenation reactor when it exits the heat exchanger, so as to realize the control of the hydrogenation reaction. Similar to the method described in the CN1335256A patent, it also does not achieve strict or precise control of the hydrogenation reaction process, and cannot be timely Adjust bed temperature rise

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