Loaded type ozone catalyst and preparation method and application thereof

A catalyst and load-type technology, applied in the field of environmental purification, can solve problems such as unsatisfactory treatment effect, high energy consumption in operation, secondary pollution of water body, etc., and achieve the effect of improving ozone utilization rate, simple preparation process and high purification efficiency

Inactive Publication Date: 2015-01-21
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because antibiotic production wastewater contains a small amount of residual antibiotics, if biochemical treatment is used, the strong inhibitory effect of residual antibiotics on microorganisms will cause complex wastewater treatment process, high cost and unstable effect
At present, physical and chemical treatment methods are often used or as a pretreatment method for subsequent biochemical treatment to reduce suspended solids in water and reduce bioinhibitory substances in antibiotic wastewater. The main methods are coagulation, reverse osmosis and membrane filtration. These physical and chemical methods exist. High operating costs and unsatisfactory treatment effects
Therefore, in the treatment process of antibiotic wastewater, the chemical treatment method is better, and the method of ozone oxidation can improve the BOD of antibiotic wastewater 5 At the same time, it has a good removal rate for CODcr, but the ozone utilization rate is low in conventional ozone oxidation, and the operating energy consumption is high. Therefore, nano-catalysts are used to improve the utilization rate of ozone, and at the same time, the powder catalyst will be recovered. Difficult to bring secondary pollution to the water body, so it is urgent to solve the preparation and application of the supported monolithic ozone catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 0.2gMn(NO 3 ) 2 Dissolve in 50mL 0.05mol / L cetyltrimethylammonium bromide aqueous solution, add 11.5mL0.1mol / L ammonia water dropwise during the stirring process, after the reaction is completed, age for 2 hours, mix 5g5A molecular sieve into the sol , continue to stir to make it evenly dispersed; after stirring for 1 hour, filter, and dry the filtered precipitate at 100°C for 2 hours, and then roast at 400°C for 2 hours to obtain a modified 5A molecular sieve, in which nano-MnO 2 The content is 1%. Weigh 4g of modified 5A molecular sieve, 1.15g of pseudoboehmite, 0.1g of methyl acrylate and mix in 8g of deionized water, stir for 0.5 hours, and use HNO 3 Adjust the pH value of the slurry to 3.5; soak the honeycomb activated carbon carrier in the slurry for 5 minutes, take it out and blow it with high-pressure nitrogen to remove the excess liquid in the pores, dry it at 120°C for 4 hours in a nitrogen atmosphere, and then bake it at 550°C for 3 hours Hours, a supporte...

Embodiment 2

[0021] 0.18gCo(NO 3 ) 2 ·6H 2 O was dissolved in 50mL 0.35mol / L cetyltrimethylammonium bromide aqueous solution, and 6mL 0.1mol / L ammonia water was added dropwise during the stirring process. After the reaction was completed, age for 2 hours, and mix 5g 5A molecular sieve into In the sol, continue to stir to make it evenly dispersed; after stirring for 1 hour, filter, and the filtered precipitate is dried at 100°C for 2 hours, and then roasted at 400°C for 2 hours to obtain a modified 5A molecular sieve, in which nano-Co 2 o 3 The content is 1%. Weigh 4g of modified 5A molecular sieve, 1.15 g of diatomaceous earth, and 0.1 g of ethyl acrylate, mix them in 8 g of deionized water, stir for 0.5 hours, and use HNO 3 Adjust the pH value of the slurry to 3.5; soak the honeycomb activated carbon carrier in the slurry for 5 minutes, take it out and blow it with high-pressure nitrogen to remove the excess liquid in the pores, dry it at 120°C for 4 hours in a nitrogen atmosphere, an...

Embodiment 3

[0024] 0.15gCu(NO 3 ) 2 ·3H 2 O was dissolved in 50mL of 0.15mol / L cetyltrimethylammonium bromide aqueous solution, and 12.5mL of 0.1mol / L ammonia water was added dropwise during stirring. After the reaction was completed, it was aged for 2 hours, and 5g of 5A molecular sieve Mix it into the sol, continue stirring to disperse it evenly; after stirring for 1 hour, filter, and dry the filtered precipitate at 100°C for 2 hours, and then roast at 400°C for 2 hours to obtain a modified 5A molecular sieve. The content of nano-CuO 1%. Weigh 4g of modified 5A molecular sieve, 1.15g of powdered activated carbon, and 0.1g of 2-methyl methacrylate, mix them in 8g of deionized water, stir for 0.5 hours, and use HNO 3 Adjust the pH value of the slurry to 3.5; soak the honeycomb activated carbon carrier in the slurry for 5 minutes, take it out and blow it with high-pressure nitrogen to remove the excess liquid in the channel, dry it at 120°C for 4 hours in a nitrogen atmosphere, and then...

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PUM

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Abstract

The invention discloses a loaded type ozone catalyst and a preparation method and an application thereof. The preparation method comprises the steps: dissolving a transition metal nitrate in a deionized water solution of cetyl trimethyl ammonium bromide, dropwise adding aqua ammonia under stirring, stirring, aging, mixing a powdered molecular sieve in the above sol, and continuing to stir to make the powdered molecular sieve uniformly dispersed; and filtering, washing, drying, then roasting, dissolving the modified molecular sieve powder, an adsorbent and an additive in deionized water, mixing and stirring uniformly, immersing a honeycomb activated carbon carrier in the solution, taking out, drying, roasting, and thus obtaining the loaded type ozone catalyst. The method has the advantages of high treatment efficiency, simple operation and low operation cost, enables the CODcr removal rate of antibiotic wastewater to reach 60%-90% or more, and also has good popularization values in treatment of other industrial wastewaters.

Description

[0001] The invention relates to an ozone catalyst in the field of environmental purification and its preparation method and application, in particular to a supported ozone catalyst and its continuous catalytic oxidation method for treating antibiotic waste water. Background technique [0002] my country is one of the major antibiotic preparation countries in the world. Antibiotic production includes processes such as microbial fermentation, filtration, extraction and crystallization, refining, and refining. Because there are still many technical difficulties in the production of antibiotics, the raw material utilization rate is low and the production process is low. There are many problems such as high residual antibiotic content in wastewater. The wastewater produced by antibiotics mainly comes from high-concentration organic wastewater from separation, extraction, and purification processes. The discharge of a large amount of antibiotic wastewater has caused serious environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/14B01J29/78C02F1/78C02F103/36
Inventor 何丹农董亚梅万晓佳赵昆峰高振源
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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