Preparation method for load transition metal catalyst for ozone oxidation as well as load transition metal catalyst and application thereof

A transition metal and ozone oxidation technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of strong toxicity of intermediate products, low ozone solubility, and utilization efficiency Low-cost problems, to achieve the effect of cheap and easy-to-obtain production equipment, stable catalytic effect, and low production cost

Inactive Publication Date: 2015-01-21
PURUIQI ENVIRONMENTAL ENG BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the solubility of ozone in water is low and easy to decompose, the utilization efficiency is low, the operating cost is high, and it has selectivity, which limits its development to a certain extent.
Although ozone can oxidize many refractory organic

Method used

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  • Preparation method for load transition metal catalyst for ozone oxidation as well as load transition metal catalyst and application thereof
  • Preparation method for load transition metal catalyst for ozone oxidation as well as load transition metal catalyst and application thereof
  • Preparation method for load transition metal catalyst for ozone oxidation as well as load transition metal catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 preparation load Mn-Cu-Na / activated alumina catalyst

[0038] A. Soak the active alumina carrier in 3wt% NaOH solution for 2 hours, then rinse it with tap water for 3 times, let it stand to dry at room temperature, then dry it at 105°C for 2 hours, and set it aside.

[0039] B. Weigh 450g Al(NO 3 ) 3 9H 2 O, dissolved in 1000ml of water, heated to 90°C for constant temperature reaction, adding aluminum powder step by step, a total of 30g, until the pH value of the solution gradually increased to between 3-4. The solution changed from gray turbidity to colorless and transparent after adding aluminum powder. After making a colorless and transparent activated alumina sol, add 20 g of hydroxylamine hydrochloride as a dispersant, stir evenly, and set aside.

[0040] C. Take the catalyst particle carrier prepared in step A, immerse it in the colorless and transparent activated alumina sol in step B, and take it out after co-immersing for 2 hours. Then stand ...

Embodiment 2

[0050] Example 2 Preparation of supported Mn-Cu-Fe-K / activated alumina catalyst

[0051] A. Soak activated carbon particles in 5wt% NaOH solution for 1 hour, rinse and let stand to dry at room temperature, then dry at 90°C for 4 hours and set aside.

[0052] B. Weigh 375g Al(NO 3 ) 3 9H 2 O, dissolved in 1000ml of water, heated to 85°C, adding 28g of aluminum powder step by step, until the pH value of the solution gradually increased to between 3-4. The solution changed from gray turbidity to colorless and transparent after adding aluminum powder. After making a colorless and transparent activated alumina sol, add 15 g of hydroxylamine hydrochloride as a dispersant, stir evenly, and set aside.

[0053] C. Take the catalyst particle carrier prepared in step A, immerse it in the colorless and transparent activated alumina sol in step B, and take it out after co-immersing for 3 hours. Then stand at room temperature for 12 hours to dry, then dry at 105° C. for 2 hours, and ba...

Embodiment 3

[0060] Embodiment 3 prepares supported Mn-Cu-Fe-Na / activated alumina catalyst

[0061] A. Soak activated carbon particles in 4wt% NaOH solution for 4 hours, rinse and leave to dry at room temperature, then dry at 95°C for 3 hours, and set aside.

[0062] B. Weigh 430g Al(NO 3 ) 3 9H 2 O, dissolved in 1000ml of water, heated to 95°C, adding 30g of aluminum powder step by step, until the pH value of the solution gradually increased to between 3-4. The solution changed from gray turbidity to colorless and transparent after adding aluminum powder. After making a colorless and transparent activated alumina sol, add 10 g of hydroxylamine hydrochloride as a dispersant, stir evenly, and set aside.

[0063] C. Take the catalyst particle carrier prepared in step A, immerse it in the colorless and transparent activated alumina sol in step B, and take it out after co-immersing for 4 hours. Then let stand to dry at normal temperature, then dry at 100° C. for 4 hours, and bake at 400° ...

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Abstract

The invention provides a preparation method for a load transition metal catalyst for ozone oxidation. The preparation method comprises the following steps: placing a catalyst carrier raw material in a NaOH aqueous solution, soaking, drying, preparing activated aluminum oxide sol, soaking catalyst particles in the activated aluminum oxide sol, drying and roasting, so as to obtain a coating, repeating the steps until a catalyst carrier coated for multiple times is obtained, enabling the content of the activated aluminum oxide coating to be 5-15% of the catalyst carrier in weight, soaking the catalyst carrier in an aqueous solution containing active constituents of transition metal, dying and roasting, so as to obtain the load transition metal catalyst. The load transition metal catalyst is high in ozone catalytic activity, the COD concentration of organic wastewater can be reduced to 50 mg/L below from 100 mg/L by the load transition metal catalyst, the load transition metal catalyst has a stable catalytic effect during the process of treating organic wastewater through catalytic ozonation, and the catalytic activity is not changed basically after the load transition metal catalyst continuously runs for multiple days in a fixed bed reactor.

Description

【Technical field】 [0001] The invention relates to a supported transition metal catalyst, in particular to a supported transition metal catalyst for ozone oxidation, its preparation method and application. 【Background technique】 [0002] In recent years, the problem of drinking water pollution has attracted widespread attention, especially some refractory organic substances in drinking water are the main pollutants that lead to the deterioration of drinking water quality, so research and development of new water treatment processes for large-scale water treatment, Effective removal of refractory organic matter in water has become a top priority. Due to its strong oxidizing properties, ozone has been widely used in the field of water treatment in recent years. [0003] However, ozone has low solubility in water, easy decomposition, low utilization efficiency, high operating cost, and selectivity, which limits its development to a certain extent. Although ozone can oxidize ma...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/78C02F101/30
Inventor 邢向军卢先春王义尚张小亮
Owner PURUIQI ENVIRONMENTAL ENG BEIJING
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