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A kind of 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., can solve the problem of uneven dispersion of alumina and activated carbon, alumina properties Instability and high sludge impurity content, to achieve the effect of improving mechanical strength and anti-wear performance, easy operation, and improving activity and stability

Active Publication Date: 2017-08-22
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 physical mixing process 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 alumina is unstable in nature, cannot be repeated, and has a complex structure

Method used

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  • A kind of preparation method of noble metal catalyst for catalytic wet oxidation
  • A kind of preparation method of noble metal catalyst for catalytic wet oxidation
  • A kind of preparation method of noble metal catalyst for catalytic wet oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Add solid aluminum chloride into distilled water, heat and stir until dissolved to obtain aluminum chloride solution (a). Dilute the concentrated ammonia water into about 10% dilute ammonia water (b) by adding appropriate amount of distilled water. Add the powdered coconut shell charcoal to the glutamic acid aqueous solution and mix evenly, the liquid-solid volume ratio is 3:1, then add water and make a slurry to obtain the slurry (c). The water glass is diluted in deionized water according to the ratio of 1:2 to prepare solution (d). After adding (a) into the gel tank and stirring and heating to 65°C, open the valve of the container containing (b), control the system in the tank to pH = 4.5 within 10 minutes, and continue to drop (b) , open the valve of the container containing (c), control the dropwise addition of the system in the tank to pH=8.0 within 30 minutes, control the valve of the container of (c), and ensure that the dropwise addition is completed at this t...

Embodiment 2

[0048] Add solid aluminum sulfate into distilled water, heat and stir until dissolved to obtain aluminum sulfate solution (a). Dilute the concentrated ammonia water into about 10% dilute ammonia water (b) by adding appropriate amount of distilled water. Add powdery coconut shell charcoal to glutamic acid aqueous solution and mix evenly, the volume ratio of liquid to solid is 3:1, then add water to beat to obtain activated carbon slurry (c). The water glass is diluted in deionized water according to the ratio of 1:2 to prepare solution (d). After adding (a) into the gel tank and stirring and heating to 65°C, open the valve of the container containing (b), control the system in the tank to pH = 4.5 within 10 minutes, and continue to drop (b) , open the valve of the container containing (c), control the dropwise addition of the system in the tank to pH=8.0 within 30 minutes, control the valve of the container of (c), and ensure that the dropwise addition is completed at this tim...

Embodiment 3

[0051] Add solid aluminum sulfate to distilled water while heating and stirring until dissolved to obtain aluminum sulfate solution (a). The solid sodium metaaluminate is formulated to a concentration of 250g Al 2 o 3 / l sodium aluminate solution (b). Add powdered coconut shell charcoal to glutamic acid aqueous solution and mix evenly, the volume ratio of liquid to solid is 3:1, then add water to make a slurry to obtain slurry (c). Take a glue tank, put 2L of deionized water into it, stir and heat to 60°C, then add the slurry (c). The water glass is diluted in deionized water according to the ratio of 1:2 to prepare solution (d). Take a reaction tank, put 2L of deionized water into it, stir and heat it to 65°C, open the valves of the containers containing (a), (b), and (c) at the same time, control the pH of the system to 8.0, and control the pH of the system within 45 minutes (a) and (c) drop off at the same time. Keep the temperature at 65°C, pH = 8.0, and after staying...

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Abstract

The invention discloses a method for preparing a noble metal catalyst for catalytic wet oxidation. The catalyst includes a carrier, precious metal components and rare earth metal additives loaded on the carrier, and its preparation method is to introduce the slurry of activated carbon treated with amino acid during the gelation of amorphous silica-alumina, and obtain the carrier material through aging and other steps after gelation , after being made into a carrier, the active metal components and additives are loaded. The catalyst of the present invention enables the reactants to contact and react with the amorphous silicon-alumina as the shell layer first, and then contact with the activated carbon as the core layer for the reaction, fully utilizing the advantages of the amorphous silicon-alumina and activated carbon, so that the catalyst has higher reactivity And use stability, improve the service life of the catalyst.

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): B01J23/63B01J35/02B01J35/00
Inventor 蒋广安刘雪玲崔晓莉张晔单广波杨春雁李宝忠郭宏山刘忠生
Owner CHINA PETROLEUM & CHEM CORP