Method for cleaning activated alumina balls in hydrogen peroxide production

A technology of activated alumina and hydrogen peroxide, applied in peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, chemical instruments and methods, inorganic chemistry, etc., can solve low cleaning efficiency, Affect production efficiency, low alumina activity and other issues, to achieve the effect of improving activity

Active Publication Date: 2020-04-10
GUANGXI TIANDONG DASHENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alumina balls in the clay bed can be reused to reduce environmental pollution after being discarded. However, the cleaning efficiency is low, and the activity of the alumina after cleaning is low, which se...

Method used

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  • Method for cleaning activated alumina balls in hydrogen peroxide production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of cleaning method of activated alumina ball in hydrogen peroxide production, comprises the following steps:

[0028] S1. Ethanol treatment

[0029] Wash the old activated alumina balls removed from hydrogen peroxide production with clean water and dry them; then stir the dried old activated alumina balls in 80% alkaline ethanol solution for 30 minutes, then take them out, wash them, and dry them .

[0030] The pH of the alkaline ethanol solution is 10. The pH of the alkaline ethanol solution was adjusted with sodium carbonate and glacial acetic acid.

[0031] S3. Steam treatment

[0032] Put the old activated alumina balls steam-treated in step S2 into a vacuum chamber to evacuate and maintain the pressure for 40 minutes, then pass high-temperature and high-pressure steam into the vacuum chamber, and heat-preserve and maintain the pressure at 120°C and 1Mpa for 2 hours.

[0033] S3. Ozone treatment

[0034] Dry the old activated alumina balls steam-treated ...

Embodiment 2

[0041] A kind of cleaning method of activated alumina ball in hydrogen peroxide production, comprises the following steps:

[0042] S1. Ethanol treatment

[0043] Wash the old activated alumina balls removed from the production of hydrogen peroxide with clean water and dry them; then stir the dried old activated alumina balls in 70% alkaline ethanol solution for 30 minutes, then take them out, wash them, and dry them .

[0044] The pH of the alkaline ethanol solution is 9. The pH of the alkaline ethanol solution was adjusted with sodium carbonate and glacial acetic acid.

[0045] S3. Steam treatment

[0046] Put the old activated alumina balls steam-treated in step S2 into a vacuum chamber to evacuate, and keep the pressure for 60 minutes, then pass high-temperature and high-pressure steam into the vacuum chamber, and heat-preserve and hold-pressure for 3 hours at 110°C and 2Mpa.

[0047] S3. Ozone treatment

[0048] Dry the old activated alumina balls steam-treated in st...

Embodiment 3

[0055] A kind of cleaning method of activated alumina ball in hydrogen peroxide production, comprises the following steps:

[0056] S1. Ethanol treatment

[0057] Wash the old activated alumina balls removed from the production of hydrogen peroxide with clean water and dry them; then stir the dried old activated alumina balls in 90% alkaline ethanol solution for 20 minutes, then take them out, wash them, and dry them .

[0058] The pH of the alkaline ethanol solution is 10. The pH of the alkaline ethanol solution was adjusted with sodium carbonate and glacial acetic acid.

[0059] S3. Steam treatment

[0060] Put the old activated alumina balls steam-treated in step S2 into a vacuum chamber to evacuate and keep the pressure for 20 minutes.

[0061] S3. Ozone treatment

[0062] Dry the old activated alumina balls steam-treated in step S2, and then pass through ozone for 1 hour. Ozone flow rate 3m3 / min.

[0063] S4. Calcination

[0064] Calcinate the old activated alu...

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Abstract

The invention provides a method for cleaning activated alumina balls in hydrogen peroxide production, and belongs to the field of hydrogen peroxide preparation. The method comprises the steps of ethanol treatment, steam treatment, ozone treatment, calcination and vibration screening. According to the cleaning method, organic matters such as anthraquinone and anthraquinone decomposers are eluted through ethanol; substances in alumina ball holes can be promoted to be removed through vacuum and steam treatment; ozone treatment is carried out to further remove organic impurities; the internal porestructures of the alumina balls are changed by calcining, and the activity is increased; and finally, powder garbage remaining in small holes is screened through vibration, and the alumina balls withhigh activity are obtained.

Description

technical field [0001] The invention relates to the field of hydrogen peroxide preparation, in particular to a method for cleaning active alumina balls in hydrogen peroxide production. Background technique [0002] Hydrogen peroxide is an important chemical product, which is widely used in papermaking, chemical industry, food, environmental protection and other fields. The preparation methods of hydrogen peroxide mainly include: electrolysis method, air cathode method, anthraquinone method, direct synthesis method of hydrogen and oxygen, oxidation method of methyl benzyl alcohol, oxidation method of isopropanol, fuel cell method and production of peroxide with carbon monoxide in aqueous solution. hydrogen method, etc. Among them, the anthraquinone method has great advantages over other methods due to its advanced technology, large production scale, high degree of automation, low cost and energy consumption, and easy treatment of the three wastes. [0003] In the production...

Claims

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Application Information

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IPC IPC(8): C01B15/023
CPCC01B15/023
Inventor 董世裕黄丰杨平徐海生
Owner GUANGXI TIANDONG DASHENG CHEM TECH
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