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Catalyst for eliminating benzene dichloride through complete catalytic oxidation and preparation method of catalyst

A completely catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve serious pollution, secondary pollution, and easy deactivation of catalysts and other problems, to achieve the effect of simple preparation process, less by-products and low price

Active Publication Date: 2015-04-08
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since V 2 o 5 -TiO 2 -V in the base catalyst 2 o 5 It is toxic and easy to cause secondary pollution, which limits its application; CaCO 3 / -Fe 2 o 3 The catalyst is easily deactivated in the reaction atmosphere with water
In addition, many catalysts for the complete catalytic oxidation of chlorinated hydrocarbons will produce a large amount of polychlorinated benzene during the application process, causing more serious pollution

Method used

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  • Catalyst for eliminating benzene dichloride through complete catalytic oxidation and preparation method of catalyst
  • Catalyst for eliminating benzene dichloride through complete catalytic oxidation and preparation method of catalyst
  • Catalyst for eliminating benzene dichloride through complete catalytic oxidation and preparation method of catalyst

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Effect test

Embodiment 1

[0016] Add 3.5g of citric acid monohydrate into 250ml of 0.1mol / L cobalt nitrate solution. After the citric acid monohydrate is completely dissolved, transfer the mixed solution to a rotary evaporator, and rotate it at 40°C until gelatin is formed. Then the temperature was raised to 65°C for overnight rotary evaporation, the obtained citrate was dried at 110°C, and roasted at 550°C for 4 hours to obtain Co 3 o 4 Catalyst, denoted as Co 3 o 4 .

Embodiment 2

[0018] Add 3.5g of citric acid monohydrate to 250ml 0.1mol / L mixed solution containing cobalt nitrate and manganese nitrate, wherein the molar ratio Mn / (Co+Mn)=0.08, and transfer the mixed solution after the citric acid monohydrate is completely dissolved Put it on the rotary evaporator, steam at 40°C until gelatin is formed, then heat up to 65°C for overnight rotary steaming, dry the obtained citrate at 110°C, and roast at 550°C for 4 hours. A manganese-doped cobalt tetroxide catalyst is obtained, denoted as CoxMnyO 4 (0.08).

Embodiment 3

[0020] Prepare the cobalt-manganese composite oxide catalyst of Mn / (Co+Mn)=0.10 according to the method for embodiment 2, be denoted as CoxMnyO 4 (0.10).

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Abstract

The invention relates to a catalyst for eliminating benzene dichloride through complete catalytic oxidation and a preparation method of the catalyst. The catalyst is prepared by the following steps: adding citric acid monohydrate into a 0.1mol / L mixed solution containing a cobalt salt and a manganese salt according to a mole ratio of citric acid monohydrate to the sum of cobalt and manganese of 0.50-0.70, wherein the mole ratio of Mn / (Co+Mn) is equal to 0.08-0.75; when the citric acid monohydrate is completely dissolved, transferring the mixed solution to a spin steaming instrument; performing spin steaming at 20-25 DEG C until colloid is generated; then heating to 60-75 DEG C, and performing spin steaming for a whole night; drying obtained citrate at 80-110 DEG C; and roasting for 4 hours at 350-600 DEG C to obtain a manganese doped cobalt tetroxide catalyst. The catalyst provided by the invention is used for eliminating benzene dichloride through low-temperature catalytic combustion, is high in activity, less in byproduct and good in stability.

Description

technical field [0001] The invention belongs to the technical field of catalytic environmental protection, and in particular relates to a catalyst for complete catalytic oxidation elimination of dichlorobenzene and a preparation method thereof. Background technique [0002] Polychlorinated aromatic hydrocarbon organic pollutants widely exist in municipal waste incineration exhaust gas, industrial exhaust gas, and power plant exhaust gas, among which polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated diphenylfuran (PCDF) are chemically stable , It will accumulate in the living body, and it is a highly toxic, carcinogenic, and organic pollutant that will cause lasting and cumulative effects on the ecosystem. Therefore, many countries have now formulated more stringent environmental regulations for PCDD / PCDF emissions. [0003] Since it is not yet possible to eliminate pollution from the source, the post-processing method to eliminate the pollution caused by polychlor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889F23G7/07B01D53/86B01D53/70
Inventor 何丹农蔡婷赵昆峰高振源杨玲袁静
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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