A kind of regeneration method of waste aluminum oxide in hydrogen peroxide production

A technology of alumina and hydrogen peroxide, applied in chemical instruments and methods, peroxides/peroxyhydrates/peroxyacids/superoxides/ozone oxides, separation methods, etc., can solve problems such as the decline of alumina yields , to achieve the effect of high regeneration efficiency, low energy consumption and low equipment dependence

Active Publication Date: 2021-03-16
王晶晶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alumina is an amphoteric oxide, which can react with alkali, which will cause a partial reaction to form a salt, thereby reducing the yield of alumina

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A regeneration method of waste aluminum oxide in hydrogen peroxide production, is characterized in that, comprises the steps:

[0028] Step S1, washing with washing liquid: add waste alumina to the washing liquid, stir for 20 minutes, and then ultrasonic for 10 minutes, then filter with 200-mesh sieve, rinse with water for 3 times, and then dry in a vacuum drying oven at 80°C to Constant weight, obtain waste alumina after washing;

[0029] Step S2, citric acid / triethylamine system treatment: add the washed waste alumina produced in step S1 into the citric acid solution for dissolution, filter to remove the insoluble precipitate, and then add triethylamine to the resulting precipitate Wash the precipitate with water for 3 times until it no longer increases, and finally place it in a vacuum drying oven at 80°C to dry to constant weight to obtain an intermediate product;

[0030] Step S3, mixing: mixing the intermediate product prepared in step S2 with pure alumina to obt...

Embodiment 2

[0038] A regeneration method of waste aluminum oxide in hydrogen peroxide production, is characterized in that, comprises the steps:

[0039] Step S1. Washing with washing liquid: Add waste alumina to the washing liquid, stir for 23 minutes, and then sonicate for 12 minutes, then filter through a 230-mesh sieve, rinse with water for 4 times, and then dry in a vacuum drying oven at 83°C to Constant weight, obtain waste alumina after washing;

[0040] Step S2, citric acid / triethylamine system treatment: add the washed waste alumina produced in step S1 into the citric acid solution for dissolution, filter to remove the insoluble precipitate, and then add triethylamine to the resulting precipitate Wash the precipitate with water for 4 times until it no longer increases, and finally place it in a vacuum drying oven at 83°C to dry to constant weight to obtain an intermediate product;

[0041] Step S3, mixing: mixing the intermediate product prepared in step S2 with pure alumina to ...

Embodiment 3

[0049] A regeneration method of waste aluminum oxide in hydrogen peroxide production, is characterized in that, comprises the steps:

[0050] Step S1. Washing with washing liquid: add waste alumina to the washing liquid, stir for 25 minutes, and then sonicate for 15 minutes, then filter through a 250-mesh sieve, rinse with water for 5 times, and then dry in a vacuum drying oven at 85°C to Constant weight, obtain waste alumina after washing;

[0051] Step S2, citric acid / triethylamine system treatment: add the washed waste alumina produced in step S1 into the citric acid solution for dissolution, filter to remove the insoluble precipitate, and then add triethylamine to the resulting precipitate Wash the precipitate with water for 5 times until it no longer increases, and finally place it in a vacuum drying oven at 85°C to dry to constant weight to obtain an intermediate product;

[0052] Step S3, mixing: mixing the intermediate product prepared in step S2 with pure alumina to ...

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PUM

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Abstract

The invention provides a regeneration method of waste aluminum oxide in hydrogen peroxide production, wherein the regeneration method is characterized by comprising the following steps: step S1, washing with a washing solution; step S2, carrying out citric acid / triethylamine system treatment; step S3, carrying out uniform mixing; step S4, roasting. The invention also discloses regenerated aluminumoxide prepared according to the regeneration method of waste aluminum oxide in hydrogen peroxide production. According to the regeneration method of the waste aluminum oxide in hydrogen peroxide production, disclosed by the invention, the waste aluminum oxide in hydrogen peroxide production can be safely, quickly and efficiently recycled, and regeneration of aluminum oxide is achieved; the regeneration efficiency is high, the aluminum oxide recovery rate is high, the environmental pollution can be effectively reduced, the resource utilization rate is improved, and the economic value, the social value and the ecological value are relatively high.

Description

technical field [0001] The invention relates to the technical field of regeneration of waste alumina, in particular to a method for regeneration of waste alumina in hydrogen peroxide production. Background technique [0002] Hydrogen peroxide is an important inorganic chemical raw material and fine chemical product. As an oxidizing agent, bleaching agent, and disinfectant, it is widely used in the fields of chemical industry, textile, papermaking, medicine, metallurgy, electronics, agriculture, military affairs, and environmental protection. With the rapid development of economic globalization, the application fields of hydrogen peroxide continue to expand, and the demand for hydrogen peroxide also continues to increase. The industrial production methods of hydrogen peroxide mainly include electrolysis method, anthraquinone method, isopropanol method, cathodic and anode reduction method, and hydrogen-oxygen direct chemical method. The electrolysis method has high current ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/08C01B15/023
CPCB01J20/08B01J20/3433B01J20/3475C01B15/023
Inventor 王晶晶
Owner 王晶晶
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