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Catalyst for catalyzing ozone oxidation wastewater and preparation method thereof

A technology of ozone oxidation and catalyst, applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical instrument and method, etc. Low surface area and other problems, to avoid insufficient contact, improve the efficiency of ozone catalytic oxidation, and improve the effect of reaction efficiency

Active Publication Date: 2020-12-18
萍乡煤科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of metal oxide catalysts without loads is limited due to their low specific surface area, easy leaching of active elements, and large crystallite structure, and the catalytic degradation effect is not obvious, but simply increasing the specific surface area of ​​the catalyst has no significant effect on its activity. influences

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A catalyst for catalyzing ozonated wastewater is prepared according to the following steps:

[0031] (1) Preparation of inner core: Activated carbon powder was mixed with 0.5 mol / L Mn(NO 3 ) 2 solution mixed completely, the N 2 Under the air environment, with the power of 400W, microwave heating for 1h to generate the kernel for standby;

[0032] (2) Preparation of the shell: add sodium alkylbenzene sulfonate, aluminum sol binder and polyvinyl alcohol pore-forming agent according to the molar ratio of 8:10:2 and mix to form a mixture for later use;

[0033] (3) Primary catalyst: mix 30 parts of the mixture with 25 parts of the inner core according to the mass parts, form a shell on the surface of the inner core of the mixture, and obtain the primary catalyst for use;

[0034] (4) Drying: Dry the primary catalyst obtained in step (3) with an ultrasonic wave with a power of 200W for 5 hours to obtain a secondary catalyst, which is ready for use;

[0035] (5) Pulveriza...

example 2

[0042] This embodiment provides a kind of embodiment with different conditions from Embodiment 1, specifically:

[0043] (1) Preparation of inner core: Activated carbon powder was mixed with 1 mol / L TiSO 4 solution mixed completely, the N 2 In an air environment, with a power of 350W, microwave heating for 1.2h to generate a kernel for use;

[0044] (2) Preparation of the shell: add fatty acid methyl ester, vinyl acetate resin binder and carbon black pore-forming agent according to the molar ratio of 10:7:2.5 to form a mixture and set aside;

[0045] (3) Primary catalyst: mix 48 parts of the mixture with 30 parts of the inner core according to the mass parts, form a shell on the surface of the inner core of the mixture, and obtain the primary catalyst for use;

[0046] (4) Drying: Dry the primary catalyst obtained in step (3) with an ultrasonic wave with a power of 300W, and dry it for 3 hours to obtain a secondary catalyst, which is ready for use;

[0047] (5) Pulverizatio...

Embodiment 3

[0054] This embodiment provides a kind of embodiment different from embodiment 1 and 2 conditions, specifically:

[0055] (1) Preparation of inner core: Activated carbon powder was mixed with 1.5 mol / L CoSO 4 solution mixed completely, the N 2 Under the air environment, with the power of 300W, microwave heating for 1.5h to generate the kernel for standby;

[0056] (2) Preparation of the shell: add magnesium sulfonate, water binder and polyethylene glycol pore-forming agent according to the molar ratio of 15:5:3 to form a mixture, and set aside;

[0057] (3) Primary catalyst: mix 48 parts of the mixture with 30 parts of the inner core according to the mass parts, and form a shell on the surface of the inner core of the mixture to obtain the primary catalyst for use;

[0058] (4) Drying: Dry the primary catalyst obtained in step (3) with an infrared ray with a power of 450W, and dry it for 2 hours to obtain a secondary catalyst, which is set aside;

[0059] (5) Pulverization: T...

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Abstract

The invention discloses a catalyst for catalyzing ozone in oxidation of wastewater and a preparation method of the catalyst and relates to the field of wastewater disposal. The catalyst comprises an inner core with a catalytic effect and an outer shell with an effect of blocking anions, and the outer shell is wrapped outside the inner core. The preparation method of the catalyst comprises the following steps of 1, preparation of the inner core; 2, preparation of the outer shell; 3, primary catalyst; 4, drying; 5, pulverization. According to the catalyst and the preparation method thereof, an anionic active agent has an effect of repelling the anions, the outer shell to which the anionic active agent is added can provide an environment with a low local anion content, the number of effectiveactive sites (hydroxyl groups) of an ozone catalyst of the inner core with the catalytic effect in the outer shell is increased, and therefore the efficiency of ozone catalytic oxidation is improved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a catalyst for catalyzing ozone oxidation wastewater and a preparation method thereof. Background technique [0002] Years of rapid economic development in my country has resulted in worrying environmental conditions, and increasing environmental protection has become a party matter of urgency. According to the 2015 China Environmental Status Bulletin, the total discharge of chemical oxygen demand in 2015 was 22.235 million tons, a decrease of 12.9% compared with 2010, but the discharge of wastewater was still relatively large. This type of organic wastewater usually has the characteristics of high COD concentration, low BOD concentration, toxicity, and many refractory substances. If it is discharged directly, it will cause serious damage to the water environment. Therefore, the economical and effective removal of such organic pollutants in water has become a hot spot in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J31/32B01J31/38C02F1/78
CPCB01J31/28B01J31/32B01J31/38C02F1/725C02F1/78
Inventor 刘宁牟伟腾卢青松杜松
Owner 萍乡煤科环保科技有限公司