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Process for treating porous carbon supports for noble metal catalysts

A technology of precious metal catalysts and treatment methods, applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of less treatment, achieve simple methods, high yields, and improve surface properties

Active Publication Date: 2015-08-19
JIANGXI HANS PRECIOUS METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the specific structure and loading process of carbon-supported noble metal catalysts, there are special requirements for carbon supports, and the published porous carbon treatment methods are seldom aimed at the treatment of supports for noble metal catalysts.

Method used

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  • Process for treating porous carbon supports for noble metal catalysts
  • Process for treating porous carbon supports for noble metal catalysts
  • Process for treating porous carbon supports for noble metal catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Carbon nanotube processing method

[0026] Add 100 grams of carbon nanotubes to the three-necked flask, control the temperature to 20 degrees, slowly add 200 ml of concentrated nitric acid (also an oxidant) under stirring, control the temperature to 120 degrees, and reflux the concentrated nitric acid for 12 hours to obtain the product. The product was washed with deionized water, dried at 100 degrees, and calcined in a hydrogen-argon mixture (5% hydrogen) at 500 degrees for 3 hours to obtain the treated product. figure 1 SEM picture of the product.

Embodiment 2

[0028] Porous carbon treatment method

[0029] (1) Preparation method of oxidized porous carbon

[0030] Add 120g NaNO to the three-necked bottle 3 , slowly add 1000 ml of concentrated H with stirring 2 SO 4 , heat up to 40 degrees and stir until dissolved; cool the acid solution with an ice-water bath, then add 240 grams of porous carbon to the acid solution, and stir for 0.5 hours; then slowly add KMnO in an ice-water bath 4 , after the addition, react for 5-10 minutes until the exotherm stops, remove the ice-water bath, use an oil bath to heat the reaction solution to about 40 degrees, and react under stirring for 2-4 hours. After the reaction was completed, it was replaced with a condensing device, the circulating water was turned on, 2000 ml of deionized water was slowly added, and the temperature was maintained at about 98-100° C. while adding deionized water, and the reaction was performed for 4 hours. After the reaction, the oil bath was removed, deionized water wa...

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Abstract

The invention belongs to the technical field of material preparations, and particularly relates to a treatment method of a porous carbon carrier for noble metal catalysts. The method treats the porous carbon carrier by using an oxidation reduction process, and comprises the following steps: firstly, treating the porous carbon carrier by using strong acid, then, adding a strong oxidant for oxidizing the treated porous carbon carrier to obtain oxidized form porous carbon, and at last, reducing the oxidized form porous carbon by using a reducing agent to obtain surface treatment porous carbon. By adopting the method, the specific surface area, pore passage structure and pore diameter of the carbon carrier can be improved and controlled, and meanwhile the hydrophilcity of the carbon carrier and the binding ability of the carbon carrier for the noble metal catalyst can be enhanced. By using the porous carbon loaded noble metal treated by the method, a carbon loaded noble metal catalyst with excellent comprehensive performance can be obtained. The processing method is simple, and low in cost, and can be used for scale production, and the yield is high.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a processing method for a porous carbon carrier used in a precious metal catalyst. Background technique [0002] Catalysts play an extremely important role in the modern chemical industry, and almost half of the chemical products use catalysts in the production process. As the most important catalyst material, noble metal catalysts have won more and more attention and applications due to their excellent activity, selectivity and stability. At present, they have been widely used in hydrogenation, dehydrogenation, oxidation, reduction, isomerization, Aromatization, cracking, synthesis and other reactions play a very important role in chemical industry, petroleum refining, petrochemical, pharmaceutical, environmental protection and other fields, as well as new energy, sensing and other fields. According to the type of catalytic reaction, noble metal catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/18B01J35/10
Inventor 李永敏王临才何治鸿相亚波
Owner JIANGXI HANS PRECIOUS METALS CO LTD
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