High-efficiency extraction process in hydrogen peroxide production process

Abstract

The invention discloses a high-efficiency extraction process in a hydrogen peroxide production process. According to the invention, in an extraction process of an anthraquinone method for producing hydrogen peroxide; an extraction tower I and an extraction tower II are arranged; an oxidation liquid is divided into two parts which are an oxidation liquid I and an oxidation liquid II; pure water is introduced from the top of the extraction tower I, and the oxidation liquid I is introduced from the bottom of the extraction tower I; the two phases are subjected to countercurrent extraction in the extraction tower I; raffinate is discharged from the top of the extraction tower I, and is subjected to separation in a liquid / liquid separator, such that a heavy phase and a light phase are obtained; the heavy phase is mixed with extract liquid from the bottom of the extraction tower I, and the mixture of the heavy phase and the extract liquid from the bottom of the extraction tower I is introduced from the top of the extraction tower II; the light phase is mixed with the oxidation liquid II, and the mixture of the light phase and the oxidation liquid II is introduced from the bottom of the extraction tower II; the two phases are subjected to countercurrent extraction in the extraction tower II; a tower top raffinate phase is introduced into a post-treatment process; and the tower bottom extraction liquid is the high-concentration hydrogen peroxide product. The high-efficiency extraction process provided by the invention is provided aiming at the defects of prior arts. The process has the advantages of high mass transfer rate, high Murphree efficiency, high product concentration, low raffinate content, and the like.

Description

technical field [0001] The invention relates to a high-efficiency extraction process in the hydrogen peroxide production process. Background technique [0002] Hydrogen peroxide is an important inorganic chemical product. Because the final product after its application is water and oxygen, it has no pollution to the environment, so it is called a green chemical product. It is used as an oxidizing agent, bleaching agent, disinfectant, deoxidizer, polymer initiator Agents and cross-linking agents are widely used in chemical, textile, paper, military, electronics, medicine, environmental protection and other industries. [0003] At present, the industrial production of hydrogen peroxide in the world mainly adopts the anthraquinone method, and the extraction process is separated by using the difference in solubility of hydrogen peroxide in water and the working fluid and the density difference between the working fluid and water. The extraction process is as follows: water is a...

AI Technical Summary

Problems solved by technology

At present, domestic extraction towers generally use sieve plate towers, generally about 50-60 plates, and there are currently several problems that are not easy to solve: (1) The density between the working liquid phase / light phase and the water phase / heavy phase The difference is small, the mass transfer driving force of the whole tower is small, and the extraction effect is not ideal, resulting in low or even unqualified product concentration at the bottom of the extraction tower; (2) When a slightly higher concentration of hydrogen peroxide is obtained at the bottom of the tower, the remaining The high content of hydrogen peroxide is not only very dangerous, but also has an adverse effect on the subsequent vacuum dehydration and post-treatment regeneration process

[0006] The above patents improve the extraction effect and hydrogen peroxide product concentration by optimizing the design of the extraction tower, but they do not greatly improve the mass transfer effect of the extraction tower, nor do they reduce the raffinate when obtaining high-concentration hydrogen peroxide

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