Catalyst for treating organic wastewater and preparation method thereof

A technology of organic wastewater and catalyst, which is applied in the field of water treatment technology and environmental functional materials, can solve the problems of not many applied researches, and achieve the effect of high COD removal rate, low precious metal content, and simple and easy-to-operate preparation method

Inactive Publication Date: 2011-06-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

There are not many studies on the application of metal carbonyls in catalytic oxidation, especially in sewage treatment.

Method used

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preparation example Construction

[0016] The invention provides a catalyst and a preparation method for catalytic wet oxidation treatment of high-concentration organic wastewater. The catalyst can oxidatively degrade various high-concentration organic compounds (such as alcohols, phenols, aromatics, carboxylic acids, and nitrogen-containing organic compounds) in water under relatively mild conditions, greatly reducing the COD in wastewater and improving the quality of wastewater. removal efficiency of COD.

[0017] Since the metal carbonyl complex loaded on the carrier has good dispersibility after decomposition, it has higher activity. The preparation of the catalyst in the present invention is based on ruthenium carbonyl and cobalt carbonyl as precursors. Roasting in different atmospheres can completely decompose it, improve its metal dispersibility, and further improve its catalytic activity.

[0018] In addition, although the metal carbonyl complex catalyst supported alone has high activity, in order to f...

Embodiment 1

[0022] Preparation of 0.3%Ru / 0.6%Ce / C by secondary impregnation: 10g activated carbon was immersed in cerium nitrate solution, impregnated at room temperature, dried at 110°C for 3h, and calcined at 600°C for 6h to obtain 0.6%Ce / C. Then add 0.063g of Ru 3 (CO) 12 Dissolve in an appropriate amount of n-hexane, impregnate the above 0.6% Ce / C, dry at 100°C for 3 hours, and pass through N 2 The 0.3%Ru / 0.6%Ce / C catalyst was prepared by heating at a rate of 5°C / min to 500°C for 5h.

[0023] The above catalyst was used to treat isopropanol simulated wastewater (COD 8g / L), the catalyst concentration was 25g / L, oxygen was introduced, the total pressure was 4.0MPa, the reaction temperature was 200°C, and the reaction time was 2h. The removal rate of COD is 88.3%.

Embodiment 2

[0025] Preparation of 0.2%Ru / 3%Co / 0.6%Ce / Al-Ti by multiple impregnation: immerse 10g of 12-35 mesh Al-Ti carrier (Ti content is 20wt%) in cerium nitrate solution, impregnate at room temperature, and dry at 110°C for 3h , Calcined at 600°C for 6h to obtain 0.6% Ce / Al-Ti. Then 0.870g Co 2 (CO) 8 Dissolve in n-hexane, impregnate the above 0.6%Ce / Al-Ti, dry at 100°C for 3h, and roast at 300°C for 6h to obtain 3%Co / 0.6%Ce / Al-Ti. Finally, add 0.042g Ru 3 (CO) 12 Dissolve in n-hexane, impregnate the above 3%Co / 0.6%Ce / Al-Ti, dry at 100°C for 3h, pass through H 2 The gas is heated at 5°C / min to 300°C for 5 hours to obtain 0.2%Ru / 3%Co / 0.6%Ce / Al-Ti.

[0026] The above catalyst was used to treat isopropanol simulated wastewater (COD 10g / L), the catalyst concentration was 25g / L, oxygen was introduced, the total pressure was 3.0MPa, the reaction temperature was 200°C, and the reaction time was 2h. The removal rate of COD is 99.3%.

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Abstract

The invention discloses a catalyst for treating organic wastewater and a preparation method thereof. The catalyst is a metal carbonyl loaded catalyst, a precursor of the catalyst is one or a combination of ruthenium carbonyl and cobalt carbonyl, a second component Ce or Fe is added at the same time, and a carrier of the catalyst is selected from one or a compound oxide of active carbon, gamma-Al2O3 and TiO2. The catalyst can be used for oxidizing and degrading different organic matters with various concentrations in water under a milder condition so as to greatly reduce COD (Chemical Oxygen Demand) in wastewater and improve the removal efficiency of the COD in the wastewater.

Description

technical field [0001] The invention relates to a catalyst for treating organic waste water and a preparation method thereof. Specifically, the catalyst is used to treat organic waste water under relatively mild conditions, and belongs to the field of water treatment technology and environmental functional materials. Background technique [0002] With the rapid development of industry, the problem of water pollution is becoming more and more serious. Especially with the development of pharmaceutical, chemical, dyestuff and other industries, there are more and more high-concentration refractory organic wastewater, which is a major difficulty in wastewater treatment. In recent years, developed countries in the world have attached great importance to the development of innovative alternative technologies in an attempt to improve processing efficiency and reduce processing costs. As a result, catalytic wet oxidation quickly appeared with new vitality. It can reduce the pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89
Inventor 于超英赵培庆陈革新高国进姚彩兰凌文凯王金梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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