Hydrogen peroxide extraction process with side column

Abstract

The invention discloses a hydrogen peroxide extraction process with a side column, which comprises the following contents: countercurrent extraction separation of oxidized liquid is carried out in an extraction column, wherein the oxidized liquid is obtained in a hydrogen peroxide production process by an anthraquinone method; the extraction column is a plate column, and an organic phase side-draw pipeline is disposed below at least one column plate; materials obtained by side draw are introduced into the lower part of the side column; an extractant is introduced into the upper part of the side column; countercurrent extraction is carried out; the side column extract is discharged from the bottom of the side column; the side column raffinate discharged from the top of the side column returns to the extraction column, and is subjected to extraction separation with the oxidized liquid. The process has the advantages of large adjustable range of device load, flexible operation, good extraction effect, no liability to flooding, and the like.

Description

technical field [0001] The invention relates to an extraction process, in particular to a hydrogen peroxide extraction process. Background technique [0002] Hydrogen peroxide (H 2 o 2 Aqueous solution) 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 and crosslinking agent are widely used in chemical industry, textile, paper making, military industry, electronics, medicine, environmental protection and other industries. [0003] At present, the industrial production of hydrogen peroxide in the world mainly adopts the anthraquinone method. The process of producing hydrogen peroxide by the anthraquinone method uses 2-ethylanthraquinone (EAQ) as the working carrier, and heavy aromatics (Ar) and trioctyl phosphate (TOP) as the solvent. , ...

AI Technical Summary

Problems solved by technology

[0005] Domestic extraction towers generally use sieve plate towers, generally about 50-60 plates, and there are several problems in operation: (1) The density difference and concentration difference between the organic phase and the aqueous phase are low, and the mass transfer The driving force is small, the tray efficiency is low, and the extraction effect is not ideal; (2) The opening area of ​​the sieve plate is difficult to grasp. If the opening area is too large, the perforation rate of the dispersed phase working liquid will be low when passing through the sieve plate, making the The mass transfer rate of the phase is low, and the extraction effect is not ideal; if the opening area is too small, the extraction tower will easily accumulate material, that is, liquid flooding will occur, and the device cannot be operated; (3) When the operating load of the device changes greatly, The extraction effect is not ideal

[0009] Although the above patents have made some innovative designs for the extraction tower to improve the extraction effect, they have not fundamentally solved the problems of unsatisfactory extraction effect and liquid flooding when the operating load of the device changes.

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