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Catalytic agent for treating industrial waste water at normal temperature and pressure and preparation method thereof

A catalyst, atmospheric technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of metal ion dissolution, high removal rate, and easy failure of catalyst catalytic activity.

Active Publication Date: 2010-03-10
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above catalysts are all catalysts formed by activated carbon or γ-alumina and other carriers supporting metal oxides such as Fe, Cu, Zn, Ni, Co or Mn. The main active component is only one metal oxide. The catalytic activity of the catalyst is and catalytic selectivity is limited at room temperature and pressure, even with H 2 o 2 Together, they can catalyze and oxidize coking wastewater, and the highest COD removal rate can only reach 98%.
In addition, due to the absence of composite compounds (Catalysis12323Communications 7(2006)478-483, AppliedCatalysis B: Environmental 72(2007)205-211), the catalyst with a single main active component is prone to metal ion dissolution during use, resulting in catalyst The catalytic activity is easy to fail and the stability of the catalyst is poor, which greatly limits the industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Catalyst with 3% Fe-Cu-Zn ternary composite metal oxide supported on activated carbon.

[0040] The components and content of the catalyst are: the mass percentage content of the activated carbon carrier is 97%, and the main active component is Fe-Cu-Zn ternary composite metal oxide, with Fe 2 o 3 , CuO, ZnO, the mass percent content of the ternary composite metal oxide is 3%, wherein Fe 2 o 3 , CuO, ZnO, Fe 2 o 3 The mass percent contents of CuO, CuO and ZnO are 2.4%, 0.3% and 0.3% respectively.

[0041] The preparation method of this catalyst comprises the following steps:

[0042] a. Take 545g of activated carbon, wash it with deionized water, dry it at 120°C and heat it at 150°C for 2 hours to complete the pretreatment for later use;

[0043] b. Weigh 36.6g FeCl 3 ·6H 2 O, 7.7g CuCl 2 ·3H 2 O and 6.0 g ZnCl 2 Three kinds of metal salts were prepared into solutions with deionized water respectively, and then mixed evenly, the volume of the mixed solution w...

Embodiment 2

[0053] Catalysts loaded with 5% Fe-Cu-Zn ternary composite metal oxides on activated carbon.

[0054] The components and content of the catalyst are: the mass percentage content of the activated carbon carrier is 95%, the main active component is Fe-Cu-Zn ternary composite metal oxide, with Fe 2 o 3 , CuO, ZnO, the mass percentage content of the ternary composite metal oxide is 5%, wherein Fe 2 o 3 , CuO, ZnO, Fe 2 o 3 , CuO and ZnO are respectively 4%, 0.5% and 0.5% by mass.

[0055] The preparation method of this catalyst comprises the following steps:

[0056] a. Take 540g of activated carbon, wash it with deionized water, dry it at 120°C and heat it at 150°C for 2 hours to complete the pretreatment for later use;

[0057] b. Weigh 60.9g FeCl 3 ·6H 2 O, 12.8g CuCl 2 ·3H 2 O and 10.0 g ZnCl 2 Three metal salts were prepared into solutions with deionized water respectively, and then mixed evenly, the volume of the mixed solution was 650ml;

[0058] c. Add activate...

Embodiment 3

[0067] Catalysts loaded with 10% Fe-Cu-Zn ternary composite metal oxides on activated carbon.

[0068] The components and content of the catalyst are: the mass percentage content of the activated carbon carrier is 90%, the main active component is Fe-Cu-Zn ternary composite metal oxide, with Fe 2 o 3 , CuO, ZnO, the mass percent content of the ternary composite metal oxide is 10%, wherein Fe 2 o 3 , CuO, ZnO, Fe 2 o 3 The mass percentage contents of CuO, CuO and ZnO are 8.0%, 1.0% and 1.0% respectively.

[0069] The preparation method of this catalyst comprises the following steps:

[0070] a. Take 550g of activated carbon, wash it with deionized water, dry it at 120°C and heat it at 150°C for 2 hours to complete the pretreatment for later use;

[0071] b. Weigh 121.9g FeCl 3 ·6H 2 O, 25.7g CuCl 2 ·3H 2 O and 20.1 g ZnCl 2 Three metal salts were prepared into solutions with deionized water respectively, and then mixed evenly, the volume of the mixed solution was 660...

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Abstract

The invention relates to a catalytic agent for treating industrial waste water at normal temperature and pressure, comprising Fe-Cu-Zn ternary composite metallic oxide loaded on activated carbon; theinvention also relates to a preparation method of the catalytic agent.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation of industrial wastewater under normal temperature and pressure. Background technique [0002] The application of coal as energy and chemical raw materials has been paid more and more attention. Coal gasification is a clean and efficient coal utilization method, but the coal gasification process produces a large amount of highly polluted coal gasification wastewater, which contains a variety of pollutants, such as phenol, cyanide, ammonia nitrogen and several aliphatic and aromatic compounds, It needs to be treated effectively before it can be discharged. [0003] In the field of wastewater treatment, indicators such as chemical oxygen demand (COD), ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, and chromaticity are often used to indicate the type and / or amount of pollutants in wastewater. Among them, COD, also known as chemical oxygen demand, refers to the amount of oxidant consumed w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J37/03C02F9/04C02F1/74C02F1/66
CPCB01J23/80B01J21/18B01J37/03B01J37/035C02F1/32C02F1/725
Inventor 万新华李伟郗名悦张国涛
Owner ENN ENVIROTECH CO LTD
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