Catalyst for regenerating anthraquinone degradation products and preparation method thereof

An anthraquinone degradation product, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes and other directions, can solve problems such as increasing production costs, achieve low wear, reduce production costs, and inhibit side reactions Effect

Active Publication Date: 2009-06-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the price of anthraquinone is 40,000 yuan / ton, if it is solved by adding anthraquinone, it will obviously lead to a substantial increase in production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Grind aluminum hydroxide to about 10 microns in a mechanical mill, send it into the raw material bin, and then transport the raw material to the flash roaster through the raw material bin, flash roast for 0.8 seconds, and control the flash roasting temperature field as follows: inlet temperature The temperature is 1050°C, the outlet temperature is 450°C, the temperature gradient is 300°C / m, and the feed rate is 4kg / min. Under this temperature field, aluminum hydroxide is dehydrated rapidly to prepare raw powder;

[0025] b. After the original powder is cooled, it is sent to the mixing bin for mixing. The weight content of the mixture is: 92% of the original powder and 8% of pseudo-boehmite with a pore volume of 0.8ml / g. After mixing for 1 hour, the mixed The material is fed into the disc granulator for granulation, and water is used as the binder to complete the ball forming operation on the disc granulator;

[0026] c. The formed material ball is sent to the rolling...

Embodiment 2

[0032] a. Grind aluminum hydroxide to about 7 microns in a mechanical mill, send it into the raw material bin, and then transport the raw material to the flash roaster through the raw material bin, flash roast for 0.6 seconds, and control the flash roasting temperature field as follows: inlet temperature The temperature is 1070°C, the outlet temperature is 430°C, the temperature gradient is 320°C / m, and the feed rate is 5kg / min. Under this temperature field, aluminum hydroxide is dehydrated rapidly to prepare raw powder;

[0033] b. After the original powder is cooled, it is sent to the mixing bin for mixing. The weight content of the mixture is: 95% of the original powder, 5% of pseudo-boehmite with a pore volume of 0.7ml / g, and the mixture is mixed for 1.5 hours. The material is fed into the disc granulator for granulation, and water is used as the binder to complete the ball forming operation on the disc granulator;

[0034] c. The formed material ball is sent to the rollin...

Embodiment 3

[0040] a. Grind aluminum hydroxide to about 13 microns in a mechanical mill, send it into the raw material bin, and then transport the raw material to the flash roaster through the raw material bin, flash roast for 1 second, and control the flash roasting temperature field as follows: inlet temperature The temperature is 1060°C, the outlet temperature is 440°C, the temperature gradient is 310°C / m, and the feed rate is 3kg / min. Under this temperature field, aluminum hydroxide is dehydrated rapidly to prepare raw powder;

[0041] b. After the original powder is cooled, it is sent to the mixing bin for mixing. The weight content of the mixture is: 85% of the original powder, 15% of the pseudo-boehmite with a pore volume of 0.8ml / g, and the mixture is mixed for 1 hour. The material is fed into the disc granulator for granulation, and water is used as the binder to complete the ball forming operation on the disc granulator;

[0042] c. The formed material ball is sent to the rollin...

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Abstract

The invention discloses a catalyst for anthraquinone degradation product regeneration, wherein the content of alumina in the catalyst is 93 to 97 wt percent; the content of macropore above 75 nanometers in the catalyst is more than 5 percent; moreover, pore volume is more than 0.42ml / g, and micropore size distribution is mainly concentrated between 50 and 100. The invention also discloses a preparation method of the catalyst. The method comprises: a, crushing and roasting aluminium hydroxide to obtain raw powder; b, mixing the 85 to 95 wt percent raw powder obtained after roasting with 5 to 15 wt percent pseudoboehmite to prepare pellet on a pelleter; c, feeding the obtained pellet into rolling or rotating equipment to carry out surface treatment; d. storing the pellet at room temperature after surface treatment; e, carrying out water washing of the pellet obtained after storing in step d, by use of water below 80 DEG C; and f, roasting the pellet after water washing. The catalyst ensures that the reduction regeneration yield of anthraquinone degradation product reaches above 10 g / L, and effectively inhibits side reaction; moreover, product abrasion wear is less than 0.3 percent.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst used for regeneration of anthraquinone degradation products, and also relates to a preparation method of the catalyst. Background technique [0002] During the production of hydrogen peroxide by the anthraquinone method, some anthraquinones in the working fluid undergo side reactions to generate degradation products and lose their effect. In order to maintain the stable and high yield of hydrogen peroxide products, it is necessary to ensure the stability of the anthraquinone content in the working fluid. Since the price of anthraquinone is 40,000 yuan / ton, if it is solved by adding anthraquinone, it will obviously lead to a substantial increase in production costs. [0003] Therefore, it is necessary to develop a catalyst to restore the activity of anthraquinone degradation products through reduction and regeneration, so as to reduce operating costs. Contents of the invention [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J35/10
Inventor 邹继承贾显鹏宋来峰高建阳刘光升
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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