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Catalyst for ozone decoloration, decoloration device and decoloration method

A catalyst and ozone technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high automation requirements, difficult degradation or destruction, and long application distance and other problems, to achieve great application prospects and good decolorization effect

Pending Publication Date: 2022-04-12
CLEAR SUZHOU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that it uses ultrasonic wave and point decoupling to simultaneously treat wastewater with ozone, which requires high equipment investment costs and equipment automation, and is far away from the actual engineering application of the enterprise, making it difficult to realize industrial application.
CN203061167U utilizes ozone aeration device to decolorize, purely uses ozone to carry out decolorization, and its internal structure of reaction tower is too simple, and ozone utilization rate is seriously insufficient, causes a large amount of invalid releases of ozone, has increased the generation cost of ozone, and the invalid release of ozone causes Air pollution is a common problem of this type of ozone reaction tower
[0004] Although the indirect oxidation reaction of ozone is rapid, if ozone oxidation is used alone, there will be problems such as low utilization rate of ozone and incomplete reaction.
At the same time, because some colored substances in wastewater contain benzene ring structures, such as 2,4-dinitrochlorobenzene, it is difficult to be degraded or destroyed by light passing through ozone, so the effect of ozone decolorization on this type of wastewater is poor. good

Method used

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  • Catalyst for ozone decoloration, decoloration device and decoloration method
  • Catalyst for ozone decoloration, decoloration device and decoloration method
  • Catalyst for ozone decoloration, decoloration device and decoloration method

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preparation example Construction

[0040] In the preparation method provided by the present invention, urea is selected as the precipitating agent, and urea is hydrolyzed to generate NH 3 , NH 3 Soluble in water to form OH — , Iron, cobalt and manganese react with hydroxide to form the corresponding hydroxide, and the hydroxide is finally calcined to form the corresponding metal oxide to obtain the corresponding ozone catalyst. The formation of Fe-Mn, Fe-Co and other differential potentials inside the catalyst is more conducive to the formation of more hydroxyl radicals on the surface of the catalyst by ozone.

[0041] In some specific embodiments, during the preparation process, the final calcination is carried out under an atmosphere of oxygen-inert gas, wherein the inert gas includes argon, helium, nitrogen, etc.; the volume fraction of oxygen is 0.1%-5% . The last step of calcination can bring a rich pore structure to the prepared catalyst, thereby further improving the catalytic efficiency. The calcina...

Embodiment 1

[0051] The present embodiment provides a kind of preparation method of catalyst for ozone decolorization, and concrete operation process is as follows:

[0052] Weigh 1g of cobalt chloride, 3g of ferric nitrate nonahydrate, and 4g of manganese chloride, dissolve them in pure water, the concentration of cobalt ions is 2mol / L, stir at about 80°C for 2h, add 0.1g of sodium citrate, 0.2g of urea , N,N,N-1-trimethyladamantyl ammonium hydroxide 3g. Stir evenly after the addition is complete, react at 150°C for 12 hours, dry after the reaction, and calcinate at 400°C for 5 hours. Calcination is carried out under a helium-oxygen mixed atmosphere, wherein the volume fraction of oxygen is 1.5%.

[0053] After the calcination is completed, the catalyst for ozone decolorization is obtained.

Embodiment 2

[0055] The present embodiment provides a kind of preparation method of catalyst for ozone decolorization, and concrete operation process is as follows:

[0056] Weigh 1.5g of cobalt sulfate, 4.5g of iron sulfate, and 4.5g of manganese sulfate, dissolve them in pure water, the concentration of cobalt ions is 3mol / L, stir at 80°C for 2 hours, add 0.15g of sodium citrate, 0.3g of urea, N,N,N-1-trimethyladamantane ammonium hydroxide 4.5g. Stir evenly after the addition is complete, react at 150°C for 12 hours, dry after the reaction, and calcinate at 400°C for 5 hours. Calcination is carried out under a helium-oxygen mixed atmosphere, wherein the volume fraction of oxygen is 2%.

[0057] After the calcination is completed, the catalyst for ozone decolorization is obtained.

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Abstract

The invention discloses a catalyst for ozone decoloration, a decoloration device and a decoloration method, and belongs to the field of environment purification. Firstly, the invention provides the preparation method of the catalyst for ozone decoloration, which comprises the following steps: dissolving a certain amount of cobalt salt, ferric salt and manganese salt in pure water, then adding sodium citrate, urea and N, N, N-1-trimethyl adamantane ammonium hydroxide for reaction, and drying and calcining after the reaction is completed to obtain the catalyst for ozone decoloration. The catalyst for ozone decoloration prepared by the invention can be used for removing some colored substances with relatively stable structures, and has a relatively great application prospect.

Description

technical field [0001] The invention belongs to the field of wastewater treatment methods. Specifically, the present invention relates to a catalyst for ozone decolorization, a decolorization device and a decolorization method. Background technique [0002] The chemical properties of ozone are very active. It has strong oxidizing properties. The standard oxidation-reduction potential is 2.07V, second only to the oxidation-reduction potential of fluorine. For most organic substances, ozone is a good oxidant. When containing unsaturated double bonds or chromophoric groups, it is easier to react with ozone, thereby being decomposed into small molecular substances or undergoing decolorization, but when the organic matter is aliphatic organic matter, it is difficult to be oxidized by ozone. In addition, the reaction process between ozone and organic matter does not need to add other chemical substances. At the same time, after the degradation of macromolecular organic matter or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/03B01J37/08C02F1/78C02F101/36C02F101/38
Inventor 曹俊
Owner CLEAR SUZHOU ENVIRONMENTAL TECH CO LTD