Integral catalyst for producing hydrogen dioxide solution as well as preparation and application thereof

An integrated catalyst, hydrogen peroxide technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of prolonging the diffusion path, low catalyst utilization, and reducing contact opportunities. and other problems, to achieve the effect of overcoming loss, filling and replacing catalysts conveniently and quickly, and reducing internal mass transfer resistance.

Inactive Publication Date: 2009-08-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This preparation process will inevitably lead to some active components being encapsulated or buried, prolonging...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Coating slurry preparation

[0027] Weigh 4.3gAl 2 o 3 ·3H 2 O, 5.5gAl(OH) 3 , 6.4g γ-Al 2 o 3 , 3.0gAl(NO 3 ) 3 And 60ml mass concentration is 10% HNO 3 solution, a slurry suspension was obtained after ball milling for 18 hours.

[0028] Catalyst preparation

[0029] Dilute the 400cpsi cordierite honeycomb matrix with a volume concentration of 3% HNO 3 Treatment, after washing with deionized water, drying at 120°C for 2 hours, after treatment at 1000°C for 2 hours, excessively impregnating the above-mentioned slurry suspension with a mass concentration of 20%, drying in microwave for 10min, and roasting at 850°C for 2 hours, after multiple dipping and roasting The coating loading was 38 wt% of the honeycomb substrate. Subsequent immersion in a PdCl3 solution with a concentration of 20mg / ml, microwave drying for 5min, and calcination at 500°C for 2 hours to obtain 0.6wt% Pd / Al 2 o 3 / Monolith catalyst A, impregnated layer thickness 35 μm.

[0030] Catalyst...

Embodiment 2

[0033] coating preparation

[0034] Weigh 12.0g of metatitanic acid, add 15ml of 10% HCl and 10% of HNO 3 5ml, ball milled for 18 hours to obtain a slurry suspension for use.

[0035] Catalyst preparation process is identical with embodiment 1, obtains 0.6wt%Pd / TiO 2 / Monolith Catalyst B, impregnated layer 30 μm. Evaluation conditions are the same as in Example 1. The results are shown in Table 1.

Embodiment 3

[0037] The catalyst preparation process is as described in Example 1. The calcination temperature in the muffle furnace is adjusted to 650 ° C. The active component is impregnated several times, and each time it is dried and calcined to obtain 1.3wt% Pd / Al 2 o 3 / Monolith Catalyst C with an impregnated layer thickness of 60 μm. Evaluation conditions are the same as in Example 1. The results are shown in Table 1.

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PUM

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Abstract

The invention provides a monolithic catalyst for oxydol production and a preparation method thereof. The catalyst uses ceramic monolithic honeycomb or metal monolithic honeycomb as a substrate, one or more of Al2O3, SiO2, CaO, MgO, TiO2, ZrO2, La2O3, CeO2, Fe2O3 and Cr2O3 as a coating material, and noble metal palladium as an active component to be used in an anthraquinone hydrogenation reaction of oxydol production. The monolithic catalyst adopts a preparation method of fractional support so as to effectively control depth of impregnation of the active component. The monolithic catalyst used in the anthraquinone hydrogenation process has the advantages of high activity, good selectivity and 82.21kg (100 percent of H2O2) /mcat.h of space-time yield of the oxydol, which is over 3 times more than a commercial bead catalyst.

Description

technical field [0001] The present invention relates to the production of hydrogen peroxide, specifically a catalyst for hydrogen peroxide production with cordierite monolithic honeycomb or metal monolithic honeycomb as the carrier and its preparation method, with the oxides of main group metals, transition metals or rare earth metals as coating materials , palladium is the active component. Background technique [0002] Hydrogen peroxide is an important inorganic chemical product, which is widely used in papermaking, chemical industry, food, environmental protection and other fields. The final product decomposed during the use of hydrogen peroxide is mainly water, which will not produce secondary pollutants. It is an environmentally friendly oxidant, and the oxidation process using hydrogen peroxide as the oxidant has the advantages of mild reaction conditions and high selectivity. With the continuous development of the green chemical process, the application of hydrogen p...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/56B01J37/025C01B15/023
Inventor 王树东张建国李德伏孔庆单
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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