Method of preparing hydrogen peroxide from all-acid working solution system by anthraquinone process

A working fluid and working fluid technology, applied in chemical instruments and methods, peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of increasing the total amount of process equipment, The increase of daily operating costs, the risk of safety production accidents, etc., achieve high regeneration effects, ensure long-term stable and efficient operation, and stable production and operation

Active Publication Date: 2014-01-08
北京凯迪森科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are different acid and alkaline working fluid systems in the entire production system, which is an unavoidable source of major safety accident hazards in the hydrogen peroxide production process
Drying the raffinate working solution with lye not only increases the hidden dangers of production safety, but also increases the complexity of the entire production process, resulting in an increase in the total amount of process equipment, an increase in fixed asset investment in device construction, and an increase in daily operating costs

Method used

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Embodiment 1

[0038] A method for preparing hydrogen peroxide by anthraquinone method full-acid working liquid system of the present invention, the device used is the laboratory simulation device of the 30,000 tons / year hydrogen peroxide industrialization test device of Guangxi Tiandong Dasheng Chemical Technology Co., Ltd., the method comprises the following step:

[0039] (1) Preparation of weakly acidic working fluid: There are many working fluid formulations in the production process of hydrogen peroxide. In the present invention, it can be prepared according to the current domestic hydrogen peroxide production common working fluid formula. In this example, 50kg of the working fluid was prepared, and in terms of mass fraction, it included 59.61% of heavy aromatics (heavy aromatics come from platinum reforming units in the petroleum industry, mainly C9 fractions), 8.32% of trioctyl phosphate, and 12.82% of 2-methylcyclohexyl acetate, 19.25% 2-ethylanthraquinone, that is, the total effect...

Embodiment 2

[0052] A method for preparing hydrogen peroxide by anthraquinone method full-acid working liquid system of the present invention, the device used is the 30,000 tons / year hydrogen peroxide industrialization test device of Guangxi Tiandong Dasheng Chemical Technology Co., Ltd., and the operation process is as follows figure 1 shown, including the following steps:

[0053] (1) Preparation of working fluid: According to the current general working fluid formula of domestic hydrogen peroxide production plants, 187,000kg of working fluid was prepared, including 40.91% of heavy aromatics, 19.82% of trioctyl phosphate, and 23.23% of 2-methyl Cyclohexyl acetate, 16.04% of 2-alkylanthraquinones, that is, the total effective anthraquinone content in the working solution is 180g / L; the prepared working solution is washed with desalted water and dilute hydrogen peroxide, and then vacuum flashed ( 45°C, -0.090MPa) to remove the washing water, and then use a phosphoric acid solution with a m...

Embodiment 3

[0062] A method for preparing hydrogen peroxide by anthraquinone method fully acidic working liquid system of the present invention, the main process is the same as that of Example 1, the only difference is that an intermittent washing step is also provided outside the main process, and the intermittent washing step includes:

[0063] (a) Pure water washing: Take out 1750g of the raffinate after vacuum flash evaporation from step (5) of the main process, that is, the circulating working fluid. According to chemical analysis, the hydrogen peroxide content in the circulating working fluid is 0.15g / L; wash the circulating working fluid with 390g of pure water (generally, the mass ratio of circulating working fluid to pure water is 4-6:1), and stir while washing to remove traces of hydrogen peroxide in the circulating working fluid. The temperature was 50°C, and the washing time was 30 minutes; after washing, let stand to separate layers, remove the water layer, and use the potass...

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Abstract

The invention discloses a method of preparing hydrogen peroxide from an all-acid working solution system by the anthraquinone process. The method includes hydrogenation, oxidization, extraction and post-treatment of working solution. During the method, the whole working solution system is faintly acid constantly. The method includes: hydrogenating prepared faintly acidic working solution to obtain hydrogenated solution; mixing the hydrogenated solution with acid, and performing air oxygenation to obtain oxidized liquid; extracting the oxidized liquid with purified water; purifying extract to obtain finished hydrogen peroxide; removing free water and free hydrogen peroxide from the extract, performing vacuum flashing to remove dissolved water and dissolved hydrogen peroxide, and using vacuum-flashed residual extract as circulating working solution. Very little circulating working solution can further be intermittently guided out of a main process for alkali washing by the method. The method has the advantages that safety and reliability of the production process of hydrogen peroxide can be improved effectively and fixed capital input and production operational cost can be reduced.

Description

technical field [0001] The invention relates to a new process for producing hydrogen peroxide by anthraquinone method, in particular to a method for preparing hydrogen peroxide by replacing the existing acid-alkaline alternating working fluid system with an all-acid working fluid system. Background technique [0002] At present, there is an alternating acid and alkali working liquid system in the domestic anthraquinone hydrogen peroxide production process. In the hydrogenation process and working fluid post-treatment process of the anthraquinone hydrogen peroxide production process, the circulating working fluid is adjusted to be weakly alkaline; while in the oxidation process and extraction process, due to the rapid decomposition of hydrogen peroxide under alkaline conditions, Danger, so the working fluid in these two processes must exist in a weakly acidic state. [0003] The existing anthraquinone-based hydrogen peroxide production process uses an acid-alkali alternating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
Inventor 卿光宗杨华刘光昌覃立波刘向农
Owner 北京凯迪森科技有限公司
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