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Method for preparing ozone catalytic oxidation catalyst for treating cyanide waste water

An ozone catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of high cost and achieve the effect of simple preparation steps

Active Publication Date: 2011-04-13
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst preparation method of the present invention is simple, environment-friendly, and low in cost; the catalyst is a highly active heterogeneous ozone catalytic oxidation catalyst, which overcomes the shortcomings of the existing catalysts such as complex preparation process, difficulty in industrial scale-up, and high cost; and the catalytic activity Higher, the treated cyanide-containing wastewater does not require other treatment and can be discharged directly

Method used

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  • Method for preparing ozone catalytic oxidation catalyst for treating cyanide waste water
  • Method for preparing ozone catalytic oxidation catalyst for treating cyanide waste water
  • Method for preparing ozone catalytic oxidation catalyst for treating cyanide waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 226gCu(NO 3 ) 2 ·3H 2 O, 379gFe(NO 3 ) 3 9H 2 O, 174gSnCl 4 ·5H 2 O, add 1.5kg of water to make 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.

[0029] Catalyst performance evaluation is achieved by the following devices:

[0030] Reactor: fixed bed reactor

[0031] Catalyst loading volume: 100ml, filling aspect ratio is 4:1

[0032] Temperature: room temperature

[0033] Residence time: 20min

[0034] Ozone generation: 4.5g / hr

[0035] Wastewater source: selected from an acrylonitrile factory wastewater, ...

Embodiment 2

[0038] The configuration of the active component solution is copper nitrate, ferric nitrate, and tin chloride equivalent to 0.5% 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.

[0039] The catalyst was tested as in Example 1, and the evaluation results of the catalyst are shown in Table 2 and Table 3.

Embodiment 3

[0041] The configuration of the active component solution is copper nitrate, ferric nitrate, and tin chloride, which are 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.

[0042] The catalyst was tested as in Example 1, and the evaluation results of the catalyst are shown in Table 2 and Table 3.

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Abstract

The invention relates to a method for preparing an ozone catalytic oxidation catalyst for treating cyanide waste water, which is characterized in that amorphous alumina is used as a carrier, and in the process of pelltizing, copper, ferrum and tin which serve as active ingredients are sprayed in form of solution, and are subjected to curing, drying and roasting to prepare a catalyst. The method comprises the following steps of: (a) dissolving metal salts of the copper, the ferrum and the tin into water to form solution; (b) putting the amorphous alumina into a rotating pelletizer, spraying the solution in the step (a) into the pelletizer to perform rolling pelltizing, and controlling the pelltizing diameter; (c) curing the particulate matters obtained in the step (b) for 3 to 24 hours under the condition of water vapor of between 100 and 110 DEG C; and (d) drying and roasting the obtained catalyst in the step (c) to obtain a catalyst serving as a finished product, wherein the drying temperature is between 50 and 180 DEG C, the drying time is between 2 and 10 hours, the roasting temperature is between 400 and 600 DEG C, and the roasting time is between 2 and 8 hours.

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 cyanide-containing wastewater, aiming to provide a preparation method of an ozone catalytic oxidation catalyst with simple preparation process, low cost, and environmental friendliness and high activity. The catalyst of the invention is mainly used for efficient removal of organic pollutants in cyanide-containing wastewater by an ozone catalytic oxidation method. Background of the invention: [0002] Cyanide-containing wastewater refers to industrial wastewater containing CN groups. A large amount of cyanide-containing wastewater is discharged in the production processes of non-ferrous metal mineral extraction of gold, silver and copper, cyanide electroplating, chemical industry, coking, heat treatment, etc., especially in the production process of mineral dressing and smelting. The mass concentration is high, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835C02F1/78C02F101/18
Inventor 苗静于海斌孙彦民滕厚开李晓云曾贤君李世鹏
Owner CHINA NAT OFFSHORE OIL CORP
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