Technology for producing hydrogen peroxide by anthraquinone process

Abstract

The invention relates to a technology for producing hydrogen peroxide by an anthraquinone process, and relates to the technical field of industrial production of hydrogen peroxide by the anthraquinoneprocess. The technology comprises a hydrogenation reaction, an oxidation reaction, extraction, a purification process and a regeneration process; in the hydrogenation reaction, a mixed solution formed by mixing a heavy aromatic hydrocarbon, trioctyl phosphate, 2-ethylanthraquinone, tetrabutyl urea and 2-ethyltetrahydroanthracene reacts with hydrogen under the action of a palladium catalyst to obtain a hydrogenated solution; and in the oxidation reaction, the hydrogenated solution containing phosphoric acid is oxidized by oxygen in air to obtain an oxidized solution. The technology can reducethe consumption of total anthraquinone, can increase the oxidation yield of the oxidation process by using the working fluid system, and makes the amount of the generated residual liquid small.

Description

technical field [0001] The invention relates to the technical field of industrial production of hydrogen peroxide by an anthraquinone method. Background technique [0002] hydrogen peroxide (H 2 o 2 ) is a strong oxidant, and its aqueous solution is commonly known as hydrogen peroxide, which has been widely used in medical, military and industrial fields. [0003] The traditional method of industrial scale production is the anthraquinone method, which mainly includes hydrogenation process, extraction and purification process and post-treatment process steps. Among them, the hydrogenation reaction mechanism is: under the action of palladium (Pd) catalyst, 2-ethylanthraquinone (EAQ) and 2-ethyltetrahydroanthraquinone (H 4 EAQ) react with hydrogen to generate 2-ethylhydroanthraquinone (HEAQ) and 2-ethyltetrahydroanthraquinone (H 4 HEAQ). The reaction formula is as follows: [0004] [0005] During the hydrogenation reaction, heavy aromatic hydrocarbons are used as solv...

AI Technical Summary

Problems solved by technology

[0016] The hydrogenation efficiency of the hydrogenation reaction in the existing process is not high, and the 2-ethylhydroanthraquinone and 2-ethyltetrahydroanthraquinone produced by the reaction are prone to precipitation, resulting in the hydrogenation liquid gas-liquid separator outlet pipeline and hydrogenation The liquid filter is clogged, resulting in the defect that production cannot be carried out smoothly. The purpose of the present invention is to propose a production process of hydrogen peroxide by anthraquinone method that can overcome the above defects.

Images