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Preparation method of ozone oxidation catalyst loaded with polymetallic oxide

A multi-metal oxide, ozone oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of low removal rate and high dissolution of catalyst active components problem, to achieve the effect of improving the removal rate

Inactive Publication Date: 2016-03-02
POTEN ENVIRONMENT GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at this stage, the removal rate of the chemical oxygen demand (COD) of sewage by using the metal-catalyzed ozonation catalyst used in this technology is on the low side, about 30% to 50%, and the stripping amount of the active components of the catalyst is on the high side

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the carrier pretreatment step, 400 mesh activated alumina is selected as the carrier material of the ozone oxidation catalyst, washed twice with clear water, then soaked in 0.80mol / L dilute nitric acid for 15 hours, and finally washed with clear water until the pH of the supernatant is neutral. Bake in an oven at 80°C for 10 hours for later use;

[0032] In the impregnation step, configure a mixed salt solution with a concentration of 0.10mol / L manganese sulfate, 0.01mol / L ferric nitrate, and 0.50mol / L cerium chloride, and add the pretreated ozone oxidation catalyst carrier material according to the dosage of 5g / L Pour it into the above mixed salt solution, shake and impregnate in a water bath at 60°C for 24 hours, filter out the impregnation after the impregnation is completed, dry in an oven at 90°C for 24 hours, repeat the above impregnation operation twice, and set aside;

[0033] In the roasting step, the multi-impregnated solid particles are roasted in a muffle...

Embodiment 2

[0036]In the carrier pretreatment step, select 200-mesh multisilica zeolite as the carrier material of the ozone oxidation catalyst, wash it twice with clean water, then soak it in 0.60mol / L dilute nitric acid for 2 hours, and finally wash it with clean water until the pH of the supernatant is neutral , baked in an oven at 72°C for 15 hours for later use;

[0037] In the impregnation step, configure a mixed salt solution with a concentration of 0.20mol / L nickel nitrate, 0.05mol / L iron sulfate, and 1.00mol / L copper nitrate, and add the pretreated ozone oxidation catalyst carrier material according to the dosage of 10g / L Put it into the above mixed salt solution, shake and impregnate in a water bath at 70°C for 20 hours, filter out the impregnation after the impregnation is completed, dry it in an oven at 60°C for 18 hours, repeat the above impregnation operation 3 times, and set aside;

[0038] In the roasting step, the multi-impregnated solid particles are roasted in a muffle ...

Embodiment 3

[0041] In the carrier pretreatment step, 200-mesh porous ceramics are selected as the carrier material of the ozone oxidation catalyst, washed twice with clear water, then soaked in 0.70mol / L dilute nitric acid for 10 hours, and finally washed with clear water until the pH of the supernatant is neutral. Bake in an oven at 85°C for 18 hours for later use;

[0042] In the impregnation step, configure a mixed salt solution with a concentration of 0.03mol / L manganese nitrate, 0.08mol / L nickel sulfate, and 0.50mol / L cobalt acetate, and add the pretreated ozone oxidation catalyst carrier material according to the dosage of 20g / L Put it into the above mixed salt solution, shake and impregnate it in a water bath at 80°C for 10 hours, filter out the impregnation after the impregnation is completed, dry it in an oven at 70°C for 30 hours, repeat the above impregnation operation twice, and set aside;

[0043] In the roasting step, the multi-impregnated solid particles are roasted in a mu...

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Abstract

The embodiment of the invention discloses a preparation method of an ozone oxidation catalyst loaded with polymetallic oxide. The method comprises the following steps that an ozone oxidation catalyst carrier is pretreated, wherein the pretreatment method comprises the steps that the ozone oxidation catalyst carrier is soaked through an acid solution after being washed through water, and then the soaked carrier is washed to be neutral and dried; immersion treatment is conducted on the pretreated ozone oxidation catalyst carrier at least once, and then calcination is conducted; the immersion treatment comprises the steps that the pretreated ozone oxidation catalyst carrier is immersed in an immersion solution to be immersed for 6-48 h at the temperature ranging from 20 DEG C to 100 DEG C, and then drying treatment is conducted, wherein the immersion solution is a mixed solution of nitrate, sulfate and acetate or chloride of three metal elements of manganese, nickel, iron, cerium, cobalt and copper, and the concentration of each metal element in the immersion solution ranges from 0.01 mol / L to 1.00 mol / L. By means of the preparation method of the ozone oxidation catalyst loaded with the polymetallic oxide, the removal rate of chemical oxygen demand (COD) in sewage can be significantly increased.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a preparation method of an ozone oxidation catalyst loaded with multimetal oxides. Background technique [0002] Ozone is a very strong oxidant. After decomposing in water, it will produce oxidative intermediates such as monoatomic oxygen (O) and hydroxyl radical (OH) with strong oxidizing ability, which will react with organic and inorganic pollutants in water to achieve the purpose of decomposing Odor, decolorization, sterilization and removal of organic matter. However, ozone is selective in the oxidation of target pollutants, especially for those organic pollutants with complex chemical structures and difficult to be biodegraded, which cannot be effectively oxidized. In order to solve this defect of ozone oxidation, ozone catalytic oxidation technology came into being. [0003] As an efficient, practical, and non-secondary pollution advanced oxidatio...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J29/76B01J29/00B01J29/78B01J29/48B01J35/10C02F1/78
Inventor 乔瑞平耿翠玉张伦梁蒋玮陈广升
Owner POTEN ENVIRONMENT GRP
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