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Method for preparing Mn-Ce/Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade

A catalyst and ozonation technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, heterogeneous catalyst chemical elements, etc., can solve the problem of incomplete research on catalytic ozonation, and achieve The effect of strengthening the load effect, improving the effect, and increasing the load uniformity

Inactive Publication Date: 2017-01-04
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic CeO 2 There are few literature reports on the research of catalytic ozone oxidation, and the research on all aspects of catalytic ozone oxidation is not systematic and complete.

Method used

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  • Method for preparing Mn-Ce/Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade
  • Method for preparing Mn-Ce/Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade
  • Method for preparing Mn-Ce/Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] (2) Preparation of catalyst: Mn-Ce / Al 2 o 3 Composite metal oxides are prepared by impregnation precipitation, including the following steps:

[0036] Step 1. According to the optimum concentration of the cerium impregnating solution determined by previous experiments, it is 0.7mol / L. According to the molar ratio of manganese and cerium of 0.2-1, weigh an appropriate amount of metal salt, dissolve it in an appropriate amount of water, and stir to make it dissolve uniformly. Add a certain amount of carrier Al to the water bath environment at -55°C 2 o 3 , the weight ratio of the carrier to the impregnation solution is 1:5, and the impregnation is carried out at a constant temperature for 12-24 hours;

[0037] Step 2. Take an appropriate amount of precipitating agent (sodium hydroxide solution), and slowly add it dropwise to the solution of the mixed salt obtained in the above step 1;

[0038] Step 3, separate by suction filtration, wash 2-4 times with deionized water...

Embodiment 1

[0061] Embodiment 1: a kind of Mn-Ce / Al 2 o 3 The method for removing phenol wastewater by catalyst combined with ozonation comprises the steps of activating the carrier, preparing the catalyst, and removing target wastewater through combined ozonation, including the following specific steps:

[0062] (1) Activation treatment of the carrier: the purchased alumina pellets were washed several times with deionized water, and dried in an oven at 110°C;

[0063] (2) Preparation of catalyst: Mn-Ce / Al 2 o 3 Composite metal oxides are prepared by impregnation precipitation, including the following steps:

[0064] Step 1. Weigh 1.2527g of manganese salt and 15.1942g of cerium salt according to the molar ratio of Mn:Ce=0.2, mix them and dissolve them in water, stir to make them dissolve uniformly, and form 50ml of impregnating solution. Add 10g carrier Al 2 o 3 , soaking at constant temperature for 12-24h.

[0065] Step 2, measure precipitating agent sodium hydroxide 23.8g and be...

Embodiment 2

[0070] Embodiment 2: a kind of Mn-Ce / Al 2 o 3 The method for removing phenol wastewater by catalyst combined with ozonation comprises the steps of activating the carrier, preparing the catalyst, and removing target wastewater through combined ozonation, including the following specific steps:

[0071] (2) Preparation of catalyst: Mn-Ce / Al 2 o 3 Composite metal oxides are prepared by impregnation precipitation, including the following steps:

[0072] Step 1. Weigh 6.2633g of manganese salt and 15.1942g of cerium salt according to the molar ratio of Mn:Ce=1, mix and dissolve in water, stir to make it dissolve uniformly, form 50ml of impregnating solution, add in water bath environment of 40-55℃ 10g carrier Al 2 o 3 , soaking at constant temperature for 12-24h. .

[0073] Step 2, measure precipitating agent sodium hydroxide 35g and be made into solution and slowly add in the solution of the mixed salt that above-mentioned step 1 obtains;

[0074] Step 3, separate by sucti...

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Abstract

The invention relates to a method for preparing a Mn-Ce / Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade.The method for preparing the Mn-Ce / Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade is high in efficiency, utilizes general aluminum oxide and composite metal oxides Mn and Ce playing a synergistic effect to support a carrier, the two added metals strengthen the supporting effect and increase load evenness, the catalytic activity of active components is fully played, and the method is remarkably improved in ozonization catalyzing and phenol degradation effect compared with a non-supported method and other methods.

Description

technical field [0001] The invention relates to a high-efficiency method for treating refractory organic wastewater by catalytic ozonation technology, especially a kind of Mn-Ce / Al 2 o 3 Preparation of catalyst and method for catalytic ozonation of phenol wastewater. Background technique [0002] Phenol is the main representative in phenolic wastewater and is one of the important pollutants in water bodies. Phenol is an important industrial raw material, which can be used to synthesize plastics, fibers, medicines, pesticides, dyes, explosives and other products. Phenol is an important raw material for the manufacture of epoxy resin, polycarbonate, ion exchange resin and synthetic drug aspirin. It is condensed with formic acid under the catalysis of acid or alkali, and the resulting phenolic resin is the main component of phenolic plastics. Phenol is very harmful to organisms and can cause serious pollution to the environment. Therefore, it is necessary to effectively trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C02F1/78C02F101/34
CPCB01J23/002B01J23/34B01J37/0213B01J37/08B01J2523/00C02F1/725C02F1/78C02F2101/345
Inventor 张洁杨戊戌曾丽
Owner CHINA UNIV OF MINING & TECH
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