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Treatment method of porous carbon carrier for noble metal catalysts

A precious metal catalyst and treatment method technology, applied in catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as less treatment, and achieve the effects of simple method, improved surface properties, and low cost

Active Publication Date: 2014-04-02
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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  • Treatment method of porous carbon carrier for noble metal catalysts
  • Treatment method of porous carbon carrier for noble metal catalysts
  • Treatment method of porous carbon carrier 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 into the three-necked flask, control the temperature at 20 degrees, slowly add 200 milliliters of concentrated nitric acid (which is also an oxidant) under stirring, control the temperature to 120 degrees, reflux the concentrated nitric acid for 12 hours, and then centrifuge to obtain the product. The product was washed with deionized water, dried at 100°C, and calcined at 500°C for 3 hours in a hydrogen-argon mixed gas (5% hydrogen) to obtain the treated product. figure 1 It is the SEM photo of the product.

Embodiment 2

[0028] Porous carbon treatment method

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

[0030] Add 120 grams of NaNO to the three-neck flask 3 , slowly add 1000 ml concentrated H under stirring 2 SO 4 , heated to 40 degrees and stirred until dissolved; cooled the acid solution with an ice-water bath, then added 240 grams of porous carbon into the acid solution, and stirred for 0.5 hours; then slowly added KMnO in an ice-water bath 4 After the addition, react for 5-10 minutes until the heat release stops, remove the ice-water bath, use an oil bath to heat the reaction solution to about 40 degrees, and react for 2-4 hours under stirring. After the reaction is over, switch to a condensing device, turn on the circulating water, slowly add 2000 ml of deionized water, heat while adding deionized water to keep the temperature at about 98-100°C, and react for 4 hours. After the reaction, the oil bath was removed, and deionized water was added to dilute the solution, then...

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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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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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