Method for purifying hydrogen peroxide

A technology of hydrogen peroxide and purification tower, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of high purification cost, increased Problems such as large labor power, waste of raw materials, equipment blockage and cleaning, etc., to improve product quality and improve the effect of containing more organic matter

Inactive Publication Date: 2012-04-25
TIANJIN DAGU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the anthraquinone method produces hydrogen peroxide, there are organic substances in the product, which brings many problems to product quality, application and further processing. The usual method is to use heavy aromatics as a single solvent to purify the extracted crude hydrogen peroxide. The organic matter contained in hydrogen is a mixture, such as: anthraquinone, tetrahydroanthraquinone and other degradation products, such as hydroxyanthrone and anthrone, involving many types, the removal effect of organic matter is poor, and the organic carbon content in the product is high , sometimes resulting in unqualified product appearance
At the same time, when the amount of heavy aromatics solvent is large, the heavy aromatics must be treated and reused, which increases the production cost
On the other hand, in the subsequent concentration process, the obtained concentrated product hydrogen peroxide contains a large amount of organic matter, which affects product sales.
At the same time, a large amount of organic matter is precipitated in the concentration equipment, causing equipment blockage and frequent cleaning, which increases the waste of labor, power and raw materials.
The traditional purification process uses a single solvent, the purification cost is high and the effect is not good

Method used

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  • Method for purifying hydrogen peroxide
  • Method for purifying hydrogen peroxide
  • Method for purifying hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Put 100ml of crude hydrogen peroxide obtained after extraction and the mixed solvent into a 500ml beaker, stir and mix at 100 rpm for 5 minutes, then stand still for 10 minutes to separate layers, and keep the temperature of the solution at 30-50°C Between, measure the organic carbon content in the hydrogen peroxide obtained after delamination. The organic carbon analyzer used is TOC-V-CPN from Shimadzu, Japan.

[0010] The mixed solvents prepared are respectively heavy aromatics and trioctyl phosphate, which are put in a beaker and stirred evenly.

[0011] Table 1 The color change of hydrogen peroxide treated with different solvents

[0012]

[0013] The two solvents are used in the purification of crude hydrogen peroxide after the ratio, and the color change of the solvent can be clearly seen from the appearance of the hydrogen peroxide obtained after the treatment. It shows that more anthraquinones are dissolved into the mixed solvent.

Embodiment 2

[0015] Put 100ml of crude hydrogen peroxide obtained after extraction and the mixed solvent into a 500ml beaker, stir and mix at 100 rpm for 5 minutes, then stand still for 10 minutes to separate layers, and keep the temperature of the solution at 30-50°C Between, measure the organic carbon content in the hydrogen peroxide obtained after delamination. The organic carbon analyzer used is TOC-V-CPN from Shimadzu, Japan.

[0016] Make the mixed solvents of different ratios in Table 2 with heavy aromatics and trioctyl phosphate, and add 3 parts of mixed solvents per 100 parts of hydrogen peroxide to process the crude hydrogen peroxide obtained in the extraction tower.

[0017] Table 2 Treatment results of 300ml hydrogen peroxide and 15ml mixed solvent according to different solvent ratios

[0018] The organic carbon content in the crude hydrogen peroxide obtained from the extraction tower is 560ppm, and the hydrogen peroxide contains 364.4ppm organic carbon after being purified b...

Embodiment 3

[0022] Make the mixed solvents of different ratios in Table 3 with heavy aromatics and trioctyl phosphate, and add 15 parts and 30 parts of mixed solvents to process the crude hydrogen peroxide obtained in the extraction tower for every 100 parts of hydrogen peroxide.

[0023] Table 3 Treatment results of different solvent dosages

[0024] The organic carbon content in the crude hydrogen peroxide obtained from the extraction tower is 560ppm, and the organic carbon content in the hydrogen peroxide after purification by heavy aromatics is 344.4ppm.

[0025]

[0026] It can be seen from the data in Table 3 that the crude hydrogen peroxide obtained in the extraction tower is purified by the mixed solvent, which can reduce the organic carbon content in the crude hydrogen peroxide more than that of heavy aromatics.

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Abstract

The invention discloses a method for purifying hydrogen peroxide, comprising the following steps: preparing heavy aromatics and trioctyl phosphate according to a volume ratio of heavy aromatics to trioctyl phosphate being 5-15 to 1into a mixed solution, then adding the mixed solution in a purification tower, and carrying out organic matter removal and purification on extracted crude hydrogen peroxide by using a conventional method at a temperature of 30-50 DEG C, wherein, the hydrogen peroxide is mixed with the mixed solution for purification according to the volume ratio of 100: 1-30. According to the invention, the quality of the hydrogen peroxide product is increased, the anthraquinone effective ingredient is recovered, and the situations that organic matters are precipitated in the device and concentrated hydrogen peroxide contains a lot of organic matters in condensation technology are improved.

Description

technical field [0001] The invention relates to a method for purifying crude hydrogen peroxide obtained after extraction in the production of hydrogen peroxide by anthraquinone method. Background technique [0002] When the anthraquinone method produces hydrogen peroxide, there are organic substances in the product, which brings many problems to product quality, application and further processing. The usual method is to use heavy aromatics as a single solvent to purify the extracted crude hydrogen peroxide. The organic matter contained in hydrogen is a mixture, such as: anthraquinone, tetrahydroanthraquinone and other degradation products, such as hydroxyanthrone and anthrone, involving many types, the removal effect of organic matter is poor, and the organic carbon content in the product is high , Sometimes it will cause the appearance of the product to be unqualified. At the same time, when the heavy aromatic solvent is used in a large amount, the heavy aromatic must be t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/013
Inventor 王凤东葛广海刘广新安家福
Owner TIANJIN DAGU CHEM CO LTD
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