A high-efficiency extraction process in the production process of hydrogen peroxide

A production process, hydrogen peroxide technology, applied in the direction of peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, non-metallic elements, etc., can solve the problem of low product concentration and mass transfer driving force Small, reduce the effect of raffinate, etc., to achieve the effect of advanced technology, reduce the number of plates, and reduce the number of plates

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A high-efficiency extraction process in the production process of hydrogen peroxide

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Experimental program
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Effect test

Embodiment 1

[0031] A two-stage extraction process is adopted, an extraction tower I and an extraction tower II, and a liquid / liquid separator is arranged between the stages. The total oxidizing liquid flow rate is 180 m 3 / h, the water flow is 6m 3 / h, the hydrogen peroxide contained in the oxidation solution is 9.5g / L. During the extraction process, all the water is added from the top of the extraction tower I, and the 90m 3 / h Oxidation solution I is added from the bottom of extraction tower I, and the raffinate after primary extraction enters the interstage liquid / liquid separator, and the separated light phase is 90 m away from oxidation solution II 3 Enter the tower bottom of extraction tower II after mixing with / h, the separated heavy phase enters the tower bottom of extraction tower II after mixing with extraction tower I extract, the tower top raffinate after extracting tower II extraction enters post-treatment process, The bottom extract is hydrogen peroxide product. The den...

Embodiment 2

[0033] A two-stage extraction process is adopted, an extraction tower I and an extraction tower II, and a liquid / liquid separator is arranged between the stages. The total oxidizing liquid flow rate is 180 m 3 / h, the water flow is 6m 3 / h, the hydrogen peroxide contained in the oxidation solution is 9.5g / L. During the extraction process, all the water is added from the top of the extraction tower I, 120 m 3 / h Oxidation solution I is added from the bottom of extraction tower I, and the raffinate after primary extraction enters the interstage liquid / liquid separator, and the separated light phase and oxidation solution II are 60 m 3Enter the tower bottom of extraction tower II after mixing with / h, the separated heavy phase enters the tower bottom of extraction tower II after mixing with extraction tower I extract, the tower top raffinate after extracting tower II extraction enters post-treatment process, The bottom extract is hydrogen peroxide product. The density ratio o...

Embodiment 3

[0035] A two-stage extraction process is adopted, the extraction tower I and the extraction tower II are equipped with a liquid / liquid separator between the stages, and a fine oil-water separation component-multiple sets of cyclone separators are installed at the head of the extraction tower II. The total oxidizing liquid flow rate is 180 m 3 / h, the water flow is 6m 3 / h, the hydrogen peroxide contained in the oxidation solution is 9.5g / L. During the extraction process, all the water is added from the top of the extraction tower I, 120 m 3 / h Oxidation solution I is added from the bottom of extraction tower I, and the overhead raffinate after primary extraction enters the interstage liquid / liquid separator, and the separated light phase and oxidation solution II are 60 m 3 Enter the tower bottom of extraction tower II after the mixing of / h, the separated heavy phase enters the tower bottom of extraction tower II after mixing with extraction tower I extract, the tower top r...

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Abstract

The invention discloses a high-efficiency extraction process in the production process of hydrogen peroxide, including the following content: in the extraction process of producing hydrogen peroxide by anthraquinone method, an extraction tower I and an extraction tower II are arranged, and the oxidation liquid is divided into two parts: the oxidation liquid I and the oxidation liquid Liquid II, pure water is introduced from the top of extraction tower I, oxidized liquid I is introduced from the bottom of extraction tower I, and the two phases are extracted countercurrently in extraction tower I; after the raffinate is discharged from the top of extraction tower I, the After separation by the separator, the heavy phase and the light phase are obtained; the heavy phase is mixed with the extraction liquid at the bottom of the extraction tower I, and introduced from the top of the extraction tower II together, and the light phase is mixed with the oxidation liquid II, and together are introduced from the bottom Introduction, the two phases are extracted countercurrently in the extraction tower II, the liquid phase of the raffinate at the top of the tower is introduced into the post-treatment process, and the extract at the bottom of the tower is the high-concentration hydrogen peroxide product. Aiming at the deficiencies of the prior art, the high-efficiency extraction process of the present invention has the advantages of fast mass transfer rate, high veneer efficiency, high product concentration and low raffinate.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/017
Inventor 解维斌杨秀娜齐慧敏王海波阮宗琳王昊晨
Owner CHINA PETROLEUM & CHEM CORP
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