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Method for preparing catalytic wet oxidation catalyst

A technology for catalyzing wet oxidation and catalyst, which is applied in physical/chemical process catalysts, catalyst carriers, metal/metal oxide/metal hydroxide catalysts, etc. It can solve the problems of complex structure, unrepeatable, and high sludge impurity content. To achieve the effect of tight binding and increase of adsorption active sites

Active Publication Date: 2015-06-03
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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  • Method for preparing catalytic wet oxidation catalyst
  • Method for preparing catalytic wet oxidation catalyst
  • Method for preparing catalytic wet oxidation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 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 aqueous glucose 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 time. ...

Embodiment 2

[0050] 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 powdered coconut shell charcoal to glucose aqueous solution and mix evenly, the volume ratio of liquid to solid is 3:1, then add water to make a slurry 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...

Embodiment 3

[0053]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 the powdered coconut shell charcoal into the sucrose 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). 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 stayi...

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Abstract

The invention discloses a method for preparing a catalytic wet oxidation catalyst. The catalyst comprises a carrier, an active metal ingredient and an auxiliary, wherein the active ingredient is one or more of Pt, Pd, Rh and Ru, and the auxiliary is rare-earth metal; and the carrier uses activated carbon as a core, and amorphous silica-alumina as a shell. The preparation method comprises the following steps: introducing slurry of saccharide treated activated carbon into the process of gelling amorphous silica-alumina, aging after gelling, and carrying out hydrothermal treatment; filtering, washing and drying to obtain a carrier material; and preparing the carrier, and loading the active metal ingredient and the auxiliary. When being used for a catalytic wet oxidation reaction, the catalyst has relatively high reaction activity and using stability, and the service life of the catalyst can be prolonged.

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 catalytic wet oxidation catalyst containing active carbon and amorphous silicon aluminum. 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 st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J35/10B01J32/00C02F1/72C02F101/34C02F101/10
Inventor 李宝忠蒋广安崔晓莉张晔单广波杨春雁刘雪玲郭宏山刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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