Modified Fenton-like catalyst and preparation method and application thereof

A catalyst and modification technology, applied in the field of modified Fenton-like catalysts and preparation, can solve the problems of complex and discontinuous application process, low catalytic degradation rate, loss of active components, etc., and achieve high hydrogen peroxide utilization, strong Tolerance and stability, long life effect

Active Publication Date: 2020-07-17
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are: the existing Fenton-like catalysts have lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] (1) Add 500mL of deionized water and 16.45g of Co(NO 3 ) 2 ·6H 2 O and 21.21 g of Al (NO 3 ) 3 ·9H 2 O, stirring at a speed of 150r / min, stirring for 4h to make it completely dissolved, slowly adding ammonia water to the solution dropwise to adjust the pH of the solution to 8.0, after filtration, a solid precipitate was obtained, which was dried in a drying box at 120°C for 6h, and then dried in a horse 10.02g of nano-cobalt aluminate was obtained after calcination at 1200℃ for 3h in a Furnace;

[0033] (2) The obtained nano-cobalt aluminate, 85.86g of titanium dioxide (purity 99wt%), and 11.18g of nitric acid solution (purity 30wt%) were sequentially added to 107mL of deionized water, stirring at a speed of 300r / min, and stirring for 6h Then mix well. The mixture was extruded into strips in an extruder, dried in a drying oven at 120°C for 6 hours, and then roasted in a muffle furnace at 500°C for 6 hours to obtain a shaped carrier;

[0034] (...

Example Embodiment

[0036] Example 2

[0037] (1) Add 20 mL of deionized water and 1.65 g of Co(NO 3 ) 2 ·6H 2 O and 2.12 g of Al (NO 3 ) 3 ·9H 2 O, stirring at a speed of 100r / min, stirring for 2h to make it completely dissolved, slowly adding ammonia water to the solution to adjust the pH of the solution to 10.0, and filtering to obtain a solid precipitate, which was dried in a drying box at 80°C for 2h, and then dried in a horse 0.99g of nano-cobalt aluminate was obtained after roasting at 800℃ for 2h in a Furnace;

[0038] (2) The obtained nano-cobalt aluminate, 98.99g of titanium dioxide (purity 99wt%), and 11.67g of nitric acid solution (purity 30wt%) were sequentially added to 111.66mL of deionized water, stirring at a speed of 200r / min, stirring Mix well after 4h. The mixture was extruded into strips in an extruder, dried in a drying oven at 80°C for 2 hours, and then calcined in a muffle furnace at 200°C for 2 hours to obtain a shaped carrier;

[0039] (3) 2.53g Fe(NO 3 ) 3 ·9H...

Example Embodiment

[0041] Example 3

[0042] (1) Add 350 mL of deionized water, 24.68 g of Co(NO 3 ) 2 ·6H 2 O and 31.81 g of Al (NO 3 ) 3 ·9H 2 O, stirring at a speed of 200r / min, stirring for 4h to make it completely dissolved, slowly adding ammonia water dropwise to the solution to adjust the pH of the solution to 6.0, and filtering to obtain a solid precipitate, which was placed in a drying box at 120 °C for drying for 8h, and then dried in a horse 15.06g of nano-cobalt aluminate was obtained after calcining at 1200℃ for 4h in a Furnace;

[0043] (2) The obtained nano-cobalt aluminate, 75.76g of titanium dioxide (purity 99wt%), and 10.59g of nitric acid solution (purity 30wt%) were sequentially added to 101.35mL of deionized water, stirring at a speed of 400r / min, stirring Mix well after 8h. The mixture was extruded into strips in an extruder, dried in a drying oven at 120 °C for 8 hours, and then calcined in a muffle furnace at 400 °C for 6 hours to obtain a shaped carrier;

[0044]...

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PUM

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Abstract

The invention discloses a modified Fenton-like catalyst for catalytic oxidation of organic wastewater by a fixed bed and a preparation method and application of the modified Fenton-like catalyst. According to the catalyst, titanium oxide is used as a carrier, iron oxide is used as an active component, and cobalt-aluminum oxide (cobalt aluminate) is used for modifying the carrier, so that the stability and the activity of the catalyst under an acidic condition are enhanced. The invention discloses a preparation method of the catalyst, which comprises the following steps: by using a cobalt saltand an aluminum salt as raw materials, preparing precipitates by using a precipitator, carrying out filtering, washing, drying, calcining and the like to obtain nano cobalt aluminate, mixing the nanocobalt aluminate with titanium dioxide, molding, drying, roasting to obtain a carrier, and preparing the catalyst by using an impregnation method. According to the catalyst disclosed by the invention,cobalt aluminate with a spinel structure can be used for modifying the catalyst, so that the stability of the catalyst in an acidic medium is enhanced, therefore, the activity of the catalyst and theutilization rate of hydrogen peroxide are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of Fenton-like catalysts, and in particular relates to a modified Fenton-like catalyst for catalytic oxidation of organic waste water in a fixed bed, a preparation method and application thereof. Background technique [0002] Due to the different pollutants and pollution levels of industrial wastewater, the biodegradability of industrial wastewater varies greatly. At present, most industrial wastewater is difficult to meet the discharge standard after biochemical treatment. It is necessary to add advanced treatment units for reprocessing to achieve discharge. Standard, advanced wastewater treatment technologies that have been developed include ozone oxidation, activated carbon adsorption, membrane separation, wet oxidation, and Fenton oxidation, among which Fenton oxidation (H 2 o 2 / Fe 2+ ) is considered to be an effective, simple and economical treatment method, while other methods are difficult to be ac...

Claims

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Application Information

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IPC IPC(8): B01J23/75C02F1/72C02F101/34
CPCB01J23/75C02F1/722C02F2101/345Y02W10/10
Inventor 魏立彬周波衡华李源张宏科
Owner WANHUA CHEM GRP
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