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Preparation process of high-purity hydrogen peroxide

A preparation process, hydrogen peroxide technology, applied in the direction of peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, chemical recovery, inorganic chemistry, etc., can solve the problem of increasing the total amount of process equipment and increasing safety production Hidden dangers, increased investment in fixed assets and other issues, to achieve the effect of reducing construction costs and daily operating costs, improving safety and reliability, and increasing utilization

Inactive Publication Date: 2015-03-11
GUANGXI TIANDONG DASHENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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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Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: a kind of preparation technology of high-purity hydrogen peroxide comprises the following specific steps:

[0021] (1) Preparation of working solution: Prepare conventional anthraquinone working solution according to the conventional method, and adjust the acid content of the working solution to 1 mgH with phosphoric acid solution 3 PO 4 / L, to obtain the weakly acidic anthraquinone working solution, the solvent used for the preparation of the working solution is a five-component mixed solvent, wherein the composition of the five-component mixed solvent is calculated by mass fraction: isooctyl acetate is 20%, and heavy aromatics is 50% , trioctyl phosphate is 18%, cyclohexyl acetate is 8%, and cyclohexyl propionate is 4%. ;

[0022] (2) Preparation of nano-palladium catalyst: using carbon nanotubes as a carrier, and using ultrasonic waves to strengthen the dispersion and uniformity of palladium and carbon nanotubes, and liquid-phase reduction in a slurry...

Embodiment 2

[0032] Embodiment 2: a kind of preparation technology of high-purity hydrogen peroxide comprises the following specific steps:

[0033] (1) Preparation of working solution: prepare conventional anthraquinone working solution according to the conventional method, and adjust the acid content of the working solution to 3 mgH with phosphoric acid solution 3 PO 4 / L, to obtain the weakly acidic anthraquinone working solution, the solvent used for the preparation of the working solution is a five-component mixed solvent, wherein the composition of the five-component mixed solvent is calculated by mass fraction: isooctyl acetate is 20%, and heavy aromatics is 50% , trioctyl phosphate is 18%, cyclohexyl acetate is 8%, and cyclohexyl propionate is 4%. ;

[0034] (2) Preparation of nano-palladium catalyst: using carbon nanotubes as a carrier, and using ultrasonic waves to strengthen the dispersion and uniformity of palladium and carbon nanotubes, and liquid-phase reduction in a slurry...

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PUM

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Abstract

The invention discloses a preparation process of high-purity hydrogen peroxide. The process comprises the steps of weakly acidic anthraquinone working solution preparation, nano-palladium catalyst preparation, catalytic hydrogenation, oxidation, extraction, post-treatment, and the like. According to the invention, the carbon-nanotube-loaded nano-palladium catalyst is used for catalysing normal-pressure hydrogenation of 2-ethylanthraquinone. The catalyst has high activity, and is easy to recycle. The catalyst can be repeatedly used, and has a good stability, such that catalyst dose can be greatly reduced. Ananthrahydroquinone microchannel reactor oxidation technology is adopted, and working solution retention time can be reduced to within 1min. The ananthrahydroquinone conversion rate reaches 95%, and the oxidation reactor volume is greatly reduced, such that the production efficiency and the working solution utilization rate are improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen peroxide preparation, in particular to a process for preparing high-purity hydrogen peroxide by an anthraquinone method. Background technique [0002] In the current industrial hydrogen peroxide preparation process, the anthraquinone autoxidation method has an absolute advantage. Most of the oxidation process uses a large bubble tower as the oxidation reactor. The oxidation tower is generally an empty bubble tower, and there are also bubble towers equipped with mixers or fillers that facilitate gas-liquid contact. Air contact for oxidation reaction. In order to meet the needs of the whole process, the general oxidation tower is bulky, expensive to manufacture and operate and maintain; at the same time, it also causes problems such as large liquid storage, long residence time of working liquid, many side reactions, and potential safety hazards in the production process. In addition, Pd / γ-Al is w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
CPCY02P20/584C01B15/023
Inventor 卿光宗
Owner GUANGXI TIANDONG DASHENG CHEM TECH
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