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Method for preparing ozone catalytic oxidation catalyst for treating coking wastewater

A technology for ozone catalytic oxidation and coking wastewater, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Adsorption, catalytic performance and other issues, to achieve the effect of simple preparation steps

Active Publication Date: 2011-04-27
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the catalyst is complicated, and industrial scale-up is difficult, and a washing step is required in the middle, and waste water containing sewage is discharged, polluting the environment, and the life of the catalyst is not mentioned in the article
And it is prepared by precipitation method, the loading of active components will inevitably lead to the loss of specific surface area and pore volume of the catalyst, which will affect the adsorption and catalytic performance of the catalyst.

Method used

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  • Method for preparing ozone catalytic oxidation catalyst for treating coking wastewater
  • Method for preparing ozone catalytic oxidation catalyst for treating coking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 129gNH 4 VO 3 Solid, add 129g oxalic acid, add 1.5kg water to dissolve into a solution, slowly add 505gFe(NO 3 ) 3 9H 2 O solid, 412g content is 50% Mn(NO 3 ) 2 solution, dissolved to obtain a solution. Get 5.4kg of amorphous alumina (produced by CNOOC Tianjin Chemical Research and Design Institute, trade name AKF101), spray into the prepared solution and carry out rolling granulation until the particle size is 3mm, stop when the particle size is 3mm, maintain at 101°C for 20hr, and dry at 110°C for 4hr. Calcined at 550°C for 3 hours to obtain an ozone catalytic oxidation catalyst. The specific surface area and active component content of the finished catalyst are listed in Table 1.

[0026] Catalyst performance evaluation is achieved by the following devices:

[0027] Reactor: fixed bed reactor

[0028] Catalyst loading volume: 100ml, filling aspect ratio is 4:1

[0029] Temperature: room temperature

[0030] Residence time: 20min

[0031] Device runni...

Embodiment 2

[0036] The configuration of the active component solution is selected from ammonium metavanadate, iron nitrate, and manganese nitrate equivalent to 1.0% of the mass of the amorphous alumina carrier, and the rest of the catalyst preparation steps are the same as in Example 1. The specific surface area and active component content of the finished catalyst are listed in Table 1.

[0037] The catalyst was tested as in Example 1, and the evaluation results of the catalyst are shown in Table 2.

Embodiment 3

[0039] The configuration of the active component solution is ammonium metavanadate, iron nitrate and manganese nitrate equivalent to 3.0% of the mass of the amorphous alumina carrier, and the rest of the catalyst preparation steps are the same as in Example 1. The specific surface area and active component content of the finished catalyst are listed in Table 1.

[0040] The catalyst was tested as in Example 1, and the evaluation results of the catalyst are shown in Table 2.

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Abstract

The invention discloses a method for preparing an ozone catalytic oxidation catalyst for treating coking wastewater, which is characterized in that: amorphous alumina is taken as carrier powder; and in the rolling granulating process, active ingredients, namely vanadium, iron and manganese are sprayed in a solution mode and are granulated, cured, dried and roasted to prepare a finished product catalyst. The catalyst is mainly used for removing nonbiodegradable organic pollutants from the coking wastewater. The amorphous alumina is prepared by quickly dehydrating industrial aluminum hydroxide at a high temperature, and has the specific surface area of 150 to 350m<2> / g, the total pore volume of 0.20 to 0.45ml / g and the average particle size of 1 to 80mu m. The active ingredients, namely the iron and the manganese in the mode of nitrate and the vanadium in the mode of ammonium metavanadate are added with water to be prepared into solution, and the spray amount of the solution is 2 to 50 percent based on the total mass of the amorphous alumina. The load capacity of the active ingredients, namely the iron, the manganese and the vanadium is 0.1 to 20.0 weight percent based on the total mass of the amorphous alumina.

Description

Technical field: [0001] The invention relates to the field of catalyst manufacture, and is a preparation method of an ozone catalytic oxidation catalyst for treating coking wastewater, aiming to provide a preparation method of an ozone catalytic oxidation catalyst with simple preparation process, low cost, high activity and long life. The catalyst of the invention is mainly used for the efficient removal of organic pollutants in coking wastewater by the ozone catalytic oxidation method. Background of the invention: [0002] Coking wastewater is produced during the process of coal coke, gas purification, and media product recovery. It is affected by many factors such as the nature of raw coal, coking process, and coking product recovery. Its composition is complex and changeable, and it is difficult to treat. Industrial wastewater. Refractory organic substances account for the majority in coking wastewater, mainly including phenols, polycyclic aromatic hydrocarbons, nitrogen-...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10C02F1/78C02F103/16C02F101/30
Inventor 苗静孙彦民于海斌曾贤君李晓云李世鹏
Owner CHINA NAT OFFSHORE OIL CORP
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