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Anthraquinone hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, inorganic chemistry, etc., can solve problems such as difficulty in controlling the perfect eggshell distribution of active components

Active Publication Date: 2007-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical wear of the catalyst during use cannot be avoided, and it is difficult to control the perfect eggshell distribution of active components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 240 g of pseudo-boehmite with 100 ml of decationized water, and stir thoroughly for 1 hour to obtain a homogeneously mixed pseudo-boehmite slurry. Add ammonia water to the mixed aqueous solution of cerium chloride, zirconium oxychloride, and lanthanum chloride, and control the final pH value to 9-10 to obtain mixed precipitates of zirconium, cerium, and lanthanum hydroxides, filter, and add the washed precipitates to Pseudoboehmite slurry. After aging at 60°C for 1 hour, dry in the air at 120°C, and bake at 650°C for 2 hours to obtain 100 g of composite alumina support. The weight of cerium oxide, zirconia and lanthanum oxide in this composite alumina support The contents are 10%, 5% and 5% respectively.

[0020] Use 70ml of palladium chloride solution, adopt the equal volume impregnation method, load palladium on the surface of the 100g composite alumina carrier (water absorption rate 70ml / 100g) that has been prepared, and the impregnated catalyst carrier is dried...

Embodiment 2

[0027] Repeat the method of Example 1 to prepare the catalyst, except that the noble metal is platinum. Before impregnating the noble metal platinum, 70ml of cobalt chloride solution is used to impregnate the composite alumina support, dried at 120°C, and then impregnated with platinum. In the finally obtained catalyst, the amount of support on the surface of the substrate is 5m%, the amount of metal platinum is 5% of the amount of support, and the weight of metal cobalt is 0.5% of the support.

[0028] Under the same reaction conditions, evaluation results: the conversion rate of anthraquinone is 86%, and the selectivity is 100%. The weight loss of the catalyst was less than 0.4% after 100 hours of reaction.

Embodiment 3

[0030] Repeat the method of Example 1 to prepare the catalyst. The difference is that the noble metals are platinum and palladium. Before the noble metal impregnation, impregnate the composite alumina support with 70 ml of manganese nitrate solution, dry at 120 ° C, and then use zirconium oxychloride 70ml of the solution was impregnated into the dried mixture, dried under the same conditions, and then impregnated with the mixed solution of platinum chloride and palladium chloride. In the catalyst finally obtained, the amount of support on the substrate surface is 35m%, the amount of metal platinum and palladium is respectively 0.2m% and 0.3m% of the support amount, and the amount of metal manganese and zirconium is respectively 0.5m% and 0.3m% of the support amount. 0.5m%.

[0031] Under the same reaction conditions, evaluation results: the conversion rate of anthraquinone is 84%, and the selectivity is 100%. The weight loss of the catalyst was less than 0.3% after 100 hours ...

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Abstract

The invention disclosed a anthraquinone hydrogenation catalyst; its character is the catalyst is made up of the matrix, support body and active component. The said matrix have openings at both ends of the rules parallel channel structure cordierite or foam alumina, the said support body coat on the surface of the matrix, mainly made up of gamma - alumina, zirconia and selected from cerium oxide, lanthanum oxide and oxidized protactinium in one or more, the weight is 5% to 35% of the body weight, the said active ingredient is loaded on the surface of the support body, made from A component or components A and B components of the mixture composition, Group A is Pd and / or platinum, it's weight is 0.5% to 5% of the support body, Group B is selected from titanium, zirconium, hafnium, manganese, drilling, cerium, lanthanum in one or more, it's weight is 0% to 1% of the support body.

Description

technical field [0001] The invention relates to a hydrogenation catalyst, more specifically to a catalyst used in the process of hydrogenation of anthraquinone to produce hydrogen peroxide. Background technique [0002] Anthraquinone hydrogenation process is an important link in the production of hydrogen peroxide by anthraquinone method. In the presence of a catalyst, anthraquinone is hydrogenated and reduced to generate hydroanthraquinone, which is oxidized by air or oxygen to obtain H 2 o 2 , while hydroanthraquinone is reduced to anthraquinone. The hydrogenation process is one of the key technologies of this method. Highly active and selective anthraquinone hydrogenation can improve unit cycle H 2 o 2 It can also reduce the degradation of anthraquinone, thereby simplifying the process flow, improving the recycling rate of working fluid, reducing production cost and improving product quality. [0003] Most of the fixed beds used in industr...

Claims

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Application Information

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IPC IPC(8): B01J23/40B01J23/42B01J23/44B01J23/63B01J23/656B01J23/89C01B15/023
Inventor 李阳邵潜贺振富龙军达志坚田辉平朱玉霞
Owner CHINA PETROLEUM & CHEM CORP
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