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Preparation method of noble metal catalyst for catalytic wet oxidation

A catalytic wet oxidation, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. And the problem of uneven dispersion of activated carbon, etc., to achieve the effect of strong adsorption capacity and large specific surface area

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method belongs to the process of physical mixing of alumina-containing species and activated carbon, and the dispersion of alumina and activated carbon is uneven; and the sludge used has high impurity content, and the obtained amorphous alumina is unstable, unrepeatable, and complex in structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Solid aluminum chloride was added to distilled water while heating and stirring until dissolved to obtain solution (a). Add an appropriate amount of distilled water to the concentrated ammonia water and dilute it into about 10wt% dilute ammonia water (b). Powdered coconut shell charcoal is impregnated with an impregnating solution containing Pt-Ce. The impregnated activated carbon is dried at 120°C for 240 minutes, roasted at 500°C for 4 hours under the protection of nitrogen, then added to glutamic acid aqueous solution and mixed evenly. The liquid-solid volume ratio The ratio is 3:1, and then add water for beating to obtain slurry (c). After adding (a) into the gelling tank and stirring and heating to 60°C, open the valve of the container containing (b), and control the system in the tank to drop to pH=4.0 within 10 minutes, then add (c), continue to add (b) dropwise, and control the dropwise addition of the tank system to pH=8.0 within 30 minutes. Keep the temperat...

Embodiment 2

[0050] Solid aluminum sulfate was added to distilled water while heating and stirring until dissolved to obtain solution (a). Add an appropriate amount of distilled water to the concentrated ammonia water and dilute it into about 10wt% dilute ammonia water (b). Powdered coconut shell charcoal was impregnated with an impregnating solution containing Rh-Ce. The impregnated activated carbon was dried at 120°C for 240 minutes, roasted at 500°C for 4 hours under the protection of nitrogen, and then added to glutamic acid aqueous solution and mixed evenly. The liquid-solid volume ratio was 3:1, and then add water for beating to obtain activated carbon slurry (c). Take a plastic tank, add (a) into the tank, stir and heat to 60°C, open the valve of the container containing (b), control the system in the tank to drop to pH=4.0 within 10 minutes, open (c ) the valve of the container, continue to drop (b), control the dropwise addition of the system in the tank to pH=8.0 within 30 minut...

Embodiment 3

[0053] Solid aluminum sulfate was added to distilled water while heating and stirring until dissolved to obtain solution (a). The solid sodium metaaluminate is formulated to a concentration of 250g Al 2 o 3 / L sodium aluminate solution (b). The powdered coconut shell charcoal was impregnated with an impregnating solution containing Rh-Ce, and the impregnated activated carbon was dried at 120°C for 240 minutes, and then roasted at 500°C for 4 hours under the protection of nitrogen, then added to the aqueous solution of glutamic acid and mixed evenly, the volume of liquid and solid The ratio is 3:1, and then add water for beating to obtain slurry (c). Take a glue tank, put 2L of deionized water into it, stir and heat it to 60°C, then add the slurry (c), dilute the water glass in deionized water according to the ratio of 1:2, and prepare the solution (d). Take a glue tank, put 2L of deionized water into it, stir and heat it to 60°C, then add the slurry (c), open the valve of t...

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Abstract

The invention discloses a preparation method of a noble metal catalyst for catalyzing wet oxidation. The catalyst includes the following core-shell structure components, the core-shell structure components are activated carbon loaded with noble metals and rare earth metals as the core, with alumina or amorphous silica aluminum as the shell, and the preparation method is to use alumina or amorphous In the silica-alumina colloidal process, the activated carbon slurry treated with amino acids and loaded with precious metals and rare earth metals is introduced, and after colloidal formation, the catalyst is obtained through aging and other steps. The catalyst of the invention has high reactivity and stability in use.

Description

technical field [0001] The invention relates to a preparation method of a catalytic wet oxidation catalyst, in particular to a preparation method of a noble metal catalyst used for catalytic wet oxidation. Background technique [0002] With the increasingly stringent global environmental protection regulations, the control indicators for sewage discharge standards are getting higher and higher. Under this form, wastewater catalytic oxidation treatment methods have been paid more and more attention to and adopted by people, such as the catalytic wet method of high-concentration sewage Oxidation, electrolytic catalytic oxidation, photocatalytic oxidation, advanced oxidation, etc. In the process of catalytic oxidation of wastewater, in order to obtain the ideal treatment effect and keep the cost of wastewater treatment low by reducing the reaction temperature and pressure, the preparation of cheap catalysts with high active components, high strength and high stability has undou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C02F1/72
Inventor 张晔单广波蒋广安刘雪玲李宝忠郭宏山刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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