Method for simultaneously removing multiple impurities in hydrogen peroxide aqueous solution

A technology of hydrogen peroxide and aqueous solution, which is applied in the field of adsorption, can solve the problems that have not yet reached the G5 standard, and achieve the effects of efficient impurity removal, simple process, and high energy consumption

Pending Publication Date: 2022-07-22
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] According to the methods reported in the above patents and literature, the content of organic impurities in the hydrogen peroxide product after adsorption treatment exceeds 10ppm, which has not yet reached the G5 standard
Moreover, a single sorbent is only effective for a specific class of impurities among organic impurities, metal cations, and acid anions

Method used

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  • Method for simultaneously removing multiple impurities in hydrogen peroxide aqueous solution
  • Method for simultaneously removing multiple impurities in hydrogen peroxide aqueous solution
  • Method for simultaneously removing multiple impurities in hydrogen peroxide aqueous solution

Examples

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Embodiment 1

[0045] A method for simultaneously removing multiple impurities in an aqueous hydrogen peroxide solution. The method goes through the following steps in sequence:

[0046] (1) The amino-functional zirconia was prepared by grafting silane coupling agent (APTES) on zirconia by copolycondensation method, wherein the molar ratio of silane coupling agent to zirconia was 0.5; The structure is amorphous, such as figure 1 shown.

[0047] The specific operation of the copolycondensation method is as follows: 24 mmol of KOH and 0.6 mmol of CTAB surfactant are dissolved in 50 mL of deionized water, and stirred at 80° C. for 0.5 hour. Then, 4 mmol of zirconium n-butoxide and 8 mmol of APTES were sequentially added to the solution, and it was observed that a precipitate formed rapidly, and the reaction was carried out at 80 °C for 3 hours. The resulting solid was filtered while hot, washed sequentially with deionized water and ethanol, and dried at 110°C. Finally, the obtained solid wa...

Embodiment 2

[0054] A method for simultaneously removing multiple impurities in an aqueous hydrogen peroxide solution. The method goes through the following steps in sequence:

[0055] (1) Amino-functionalized zirconia is prepared by grafting APTES on zirconia by a copolycondensation method, wherein the molar ratio of the silane coupling agent to the zirconia is 1; the specific preparation method is the same as that in Example 1.

[0056] (2) the concentration of the industrial-grade hydrogen peroxide is 29.38wt%;

[0057] (3) 20 mL of the aqueous hydrogen peroxide solution in step (2) was taken and adsorbed with 20 mg of the amino-functionalized zirconia in step (1) in a round-bottomed flask for 1 hour, and the adsorption experiment was carried out under a water bath condition of 30°C.

[0058] The changes of the impurity content in the hydrogen peroxide aqueous solution before and after adsorption are shown in Table 3. The concentration of the hydrogen peroxide aqueous solution after a...

Embodiment 3

[0062] A method for simultaneously removing multiple impurities in an aqueous hydrogen peroxide solution. The method goes through the following steps in sequence:

[0063] (1) Amino-functionalized zirconia is prepared by grafting APTES on zirconia by a copolycondensation method, wherein the molar ratio of the silane coupling agent to the zirconia is 2; the specific preparation method is the same as that in Example 1.

[0064] (2) the concentration of the industrial-grade hydrogen peroxide is 29.38wt%;

[0065] (3) Take 20 mL of the aqueous hydrogen peroxide solution in step (2), and adsorb 20 mg of the amino-functionalized zirconia in step (1) in a round-bottomed flask for 1 hour. The adsorption experiment was carried out under a water bath condition of 30°C.

[0066] The change of impurity content in the hydrogen peroxide aqueous solution before and after adsorption is shown in Table 4. The concentration of the hydrogen peroxide aqueous solution after adsorption was 28.69 w...

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Abstract

The invention belongs to the technical field of adsorption, and particularly relates to a method for simultaneously removing multiple impurities in a hydrogen peroxide aqueous solution. According to the method, amino-functionalized zirconium oxide is used as an adsorbent to simultaneously adsorb three impurities of metal cations, acid radical anions and TOC in a hydrogen peroxide aqueous solution; before and after adsorption, the content change of hydrogen peroxide in the hydrogen peroxide aqueous solution does not exceed 3.13%, and the content of hydrogen peroxide in the hydrogen peroxide aqueous solution before adsorption is taken as a reference.

Description

technical field [0001] The invention belongs to the technical field of adsorption, and in particular relates to a method for simultaneously removing multiple impurities in an aqueous hydrogen peroxide solution. Background technique [0002] The anthraquinone method is the mainstream technology for producing hydrogen peroxide, and the hydrogen peroxide produced by this method occupies more than 98% of the global market. The anthraquinone method includes three main steps of hydrogenation, oxidation, and extraction, and requires the use of various chemicals, such as anthraquinone derivatives, heavy aromatic hydrocarbons, palladium catalysts, activated alumina, and phosphoric acid. Therefore, there are many kinds of impurities in hydrogen peroxide products, including organics, metal cations, acid anions, etc. [0003] Hydrogen peroxide product specifications can be divided into industrial grade (GB / T 1616-2014), pharmaceutical grade, food grade (GB22216-2020) and electronic gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/013
CPCC01B15/013
Inventor 王一统王涖王庆法刘国柱李国柱潘伦邹吉军张香文
Owner TIANJIN UNIV
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