System and process for safe extraction and purification of hydrogen peroxide

Abstract

The invention discloses a system and a process for safe extraction and purification of hydrogen peroxide. The system for the safe extraction and purification of the hydrogen peroxide comprises an extraction tower, a raffinate separator, a working liquid metering tank and inert gas sources, a raffinate at the upper part of the extraction tower enters the raffinate separator to separate water and then enters the working liquid metering tank, the inert gas sources respectively flush inert gases into the gas phase spaces of the extraction tower, the raffinate separator and the working liquid metering tank. The raffinate at the upper part of the extraction power is separated through a stainless steel metal filler, and overflows into the raffinate separator through a raffinate outlet interceptor, the raffinate is separated out of water in the raffinate separator and then enters the working liquid metering tank, and an aqueous phase at the bottom of the raffinate separator enters an acid waste working liquid storage tank; the inert gases are introduced into the gas phase spaces of the extraction tower, the raffinate separator and the working liquid metering tank to be protected; the extraction power is separately emptied, the working fluid metering tank and the raffinate separator are emptied after emptying pipelines are combined.

Description

technical field [0001] The invention relates to a system and process for safe extraction and purification of hydrogen peroxide. Background technique [0002] At present, the leading process of hydrogen peroxide production is palladium catalyst-anthraquinone hydrogenation process, which is divided into hydrogenation unit, oxidation unit, extraction and purification unit, post-treatment unit, alkali evaporation and so on. The process flow of the extraction and purification unit of this process is as follows: using the difference in the solubility of hydrogen peroxide in water and the working fluid and the density difference between the working fluid and water, the working fluid containing hydrogen peroxide is extracted with pure water in the extraction tower to obtain the over Aqueous solution of hydrogen peroxide. The aqueous solution of hydrogen peroxide is purified by heavy aromatics in the purification tower to obtain hydrogen peroxide with a concentration of 27.5%. The ...

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Problems solved by technology

[0005] In order to overcome the defects of the prior art, the present invention discloses a system and process for the safe extraction and purification of hydrogen peroxide, which solves the problem of flash explosion in the gas phase space at the top of the extraction tower in the traditional process and causes safety accidents

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