Treatment method for continuous regeneration of hydrogen peroxide working solution produced by anthraquinone process

Abstract

The invention provides a treatment method for continuous regeneration of hydrogen peroxide working solution produced by an anthraquinone process. The method comprises the following steps of: mixing the working solution and alkaline liquor according to a ratio, making the mixture enter a tubular reactor for reaction, and separating the working solution from the reacted mixed solution by using a separator; washing the separated working solution by using heated deionized water, and making the working solution washed by the deionized water enter a production system. The alkaline liquor separated by the separator and the washing solution washed out by the deionized water are used for replacing partial alkaline liquor for recycling. The method realizes continuous alkaline washing regeneration treatment of the hydrogen peroxide working solution by the anthraquinone process, and has the advantages of good alkaline washing treatment effect on the working solution, high treatment capability, low consumption of raw materials, low wastewater amount, low labor intensity, and the like.

Description

technical field [0001] The invention relates to the continuous regeneration treatment technology of the working liquid in the production of hydrogen peroxide by anthraquinone method, in particular, it is a continuous regeneration treatment method of the working liquid in the production of hydrogen peroxide by anthraquinone method for preparing hydrogen peroxide. Background technique [0002] In the preparation of hydrogen peroxide, the anthraquinone process is currently widely used in the production of hydrogen peroxide. In this process, alkylanthraquinones dissolved in a solvent or solvent mixture (working solution) are first hydrogenated to alkylhydroanthraquinones in the presence of a hydrogenation catalyst (hydrogenation step). The alkylhydroanthraquinones are then oxidized to regenerate the original alkylanthraquinones with concomitant formation of hydrogen peroxide (oxidation step). Hydrogen peroxide is usually isolated extractively with water (extraction step), while...

AI Technical Summary

Problems solved by technology

[0003] In the production of hydrogen peroxide by the anthraquinone method, the working liquid is used as the working carrier of the alkyl anthraquinone, and after continuous hydrogenation and oxidation steps, the degraded impurities of the alkyl anthraquinone will inevitably be produced, thereby affecting the production efficiency

Intermittent alkali cleaning regeneration treatment is generally adopted for this. After the hydrogen peroxide working fluid is recycled, degradation products will be generated with complex components. During the hydrogenation oxidation process, anthrone, hydroxyanthrone, 2-ethylanthraquinone epoxide, etc. will be generated. Affect the effect of working fluid

At the same time, some impurities will be brought into the finished product of hydrogen peroxide, affecting the quality of the finished product of hydrogen peroxide

This process has defects such as poor treatment effect, limited treatment capacity, high consumption of raw materials, large amount of wastewater, and high labor intensity.

Once the working fluid regeneration treatment effect is not ideal, it will cause the hydrogen peroxide production system to deteriorate: the hydrogenation efficiency will decrease, the output and quality will decrease; even the hydrogen peroxide production system will be shut down

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