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Catalyst for producing auricome by anthraquinone method and preparation method thereof

A hydrogen peroxide and catalyst technology, which is applied in the field of supported noble metal catalysts for anthraquinone production and its preparation, can solve problems that have not been seen yet, and achieve the effects of high selectivity, simple preparation method, and mild reaction conditions

Inactive Publication Date: 2009-06-24
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in addition to the above-mentioned promoters, there are no reports of the application of other promoters in alumina-supported Pd catalysts in the open literature. Hydrogen production of hydrogen peroxide is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Weigh 10 grams of spherical γ-Al with a diameter of about 3mm 2 o 3 As a carrier (the specific surface area is about 130-150m 2 / g), roasted at 600°C for 4h for later use. 1.5ml concentration of 0.05gCr / ml Cr(NO 3 ) 3 solution with 3.2ml of H at a concentration of 0.0094gPd / ml 2 PdCl 4 The solutions were mixed and diluted to 12 ml with distilled water to obtain an impregnation solution. Immerse the above γ-Al with impregnating solution 2 o 3 Carrier, the obtained impregnation is dried at 100-120°C for 6-8h, calcined at 500-600°C for 4h, and finally in H 2 Reduction at 300°C for 2-5 hours under atmosphere to obtain the desired catalyst. The loads of Pd and Cr on the carrier in the catalyst are 0.3wt% and 0.8wt%, respectively.

[0015] Put 3.5ml of the above-mentioned catalyst into a stainless steel reactor with an inner diameter of 8mm and a length of 500mm. When the liquid space velocity is 28.6h -1 , the hydrogen pressure is 0.18MPa, and the 2-eth...

Embodiment 2

[0016] Embodiment 2: The carrier and its pretreatment are the same as in Embodiment 1. 3.0ml of Cr(NO with a concentration of 0.05gCr / ml 3 ) 3 solution with 3.2ml of H at a concentration of 0.0094gPd / ml 2 PdCl 4 The solutions were mixed and diluted to 12 ml with distilled water to obtain an impregnation solution. The dipping process and subsequent treatment are the same as in Example 1. The loads of Pd and Cr on the carrier in the catalyst are 0.3wt% and 1.6wt%, respectively.

[0017] Get this catalyzer 3.5ml, experiment with the method identical with embodiment 1, reaction hydrogenation efficiency is 8.65g (H 2 o 2 ) / L, selectivity 99.6%.

Embodiment 3

[0018] Embodiment 3: The carrier and its pretreatment are the same as in Embodiment 1. 1.0ml concentration of 0.09gZr / mL of Zr(NO 3 ) 4 Dilute with distilled water to 12ml to impregnate the carrier, dry the impregnated product at 100-120°C for 6-8h, roast at 500-600°C for 4h, and cool for later use. 3.2ml concentration of 0.0094gPd / ml H 2 PdCl 4 Dilute the solution to 12ml with distilled water, pour it on the above-mentioned carrier containing Zr additive, dry the impregnated material at 100-120°C for 6-8h, roast at 500-600°C for 4h, and finally put it under H 2 Reduction at 300°C for 2-5 hours under atmosphere to obtain the desired catalyst. The loads of Pd and Zr on the carrier in the catalyst are 0.3wt% and 1.0wt%, respectively.

[0019] Get this catalyzer 3.5ml, experiment with the method identical with embodiment 1, reaction hydrogenation efficiency is 10.10g (H 2 o 2 ) / L, selectivity 99.9%.

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Abstract

The invention discloses a catalyst for producing hydrogen peroxide by an anthraquinone method and a preparation method thereof. The composition of the catalyst is represented by Pd-MOx / gamma-Al2O3, and M represents a metal element Cr, Zr or Mn. The catalyst can be prepared by adopting an incipient co-impregnation method and a two-step impregnation method, and the hydrogenation activity test of 2-ethyl anthraquinone is performed under the condition that the liquid space velocity is 28.6h<-1>, the hydrogen pressure is 0.18MPa, and the reaction temperature is 45 DEG C. The catalyst has the advantages that the catalyst has high catalytic activity, and the hydrogenation efficiency can reach between 8.0 and 10.0g (H2O2) / L; the catalyst has good selectivity which is more than 99 percent; the catalyst has the simple preparation method; and the catalyst has mild reaction conditions, still keeps high activity at high liquid space velocity, and is suitable for industrial scale-up production.

Description

technical field [0001] The invention relates to a supported noble metal catalyst for anthraquinone production and a preparation method thereof. Background technique [0002] Hydrogen peroxide, also known as hydrogen peroxide, is one of the main basic chemical products in the world. Because the final product after its application is water and oxygen, it has no pollution to the environment. It is called a typical "green" chemical and has been widely used in textile, paper, chemical, electronic, pharmaceutical and other industries. Today, environmental issues have become one of the focuses of the international community, and green chemical processes have attracted people's attention, and the research and application of hydrogen peroxide in green organic synthesis, catalytic oxidation desulfurization, and pollutant degradation environmental protection industries have made the process The application prospect of hydrogen peroxide is increasingly promising. [0003] The preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/64C01B15/023
Inventor 徐贤伦王丰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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