Complete catalytic oxidation elimination catalyst of dichlorobenzene and preparation method thereof

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 the problem of catalyst deactivation, serious pollution and secondary pollution. and other problems, to achieve the effect of low price, simple preparation process and few by-products

Active Publication Date: 2017-02-22
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Complete catalytic oxidation elimination catalyst of dichlorobenzene and preparation method thereof
  • Complete catalytic oxidation elimination catalyst of dichlorobenzene and preparation method thereof
  • Complete catalytic oxidation elimination catalyst of dichlorobenzene and preparation method thereof

Examples

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Effect test

Embodiment 1

[0016] Add 3.5g of citric acid monohydrate to 250ml of 0.1mol / L cobalt nitrate solution. After the citric acid monohydrate is completely dissolved, transfer the mixed solution to a rotary steamer, and spin steam at 40°C until there is gum formation. Then the temperature was increased to 65°C overnight, and the resulting citrate was dried at 110°C and calcined 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 of 0.1mol / L mixed solution containing cobalt nitrate and manganese nitrate, where the molar ratio Mn / (Co+Mn)=0.08, transfer the mixed solution after the citric acid monohydrate is completely dissolved On the rotary steamer, rotate at 40°C until there is gum formation, 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. Obtain manganese-doped cobalt tetroxide catalyst, denoted as CoxMnyO 4 (0.08).

Embodiment 3

[0020] The cobalt-manganese composite oxide catalyst with Mn / (Co+Mn)=0.10 was prepared according to the method of Example 2, and it was recorded 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 catalysis and environmental protection, and particularly relates to a catalyst for complete catalytic oxidation and elimination of dichlorobenzene and a preparation method thereof. Background technique [0002] Polychlorinated aromatic hydrocarbon organic pollutants are widely present in municipal waste incineration waste gas, industrial waste gas, and power plant waste gas. Among them, polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated diphenyl furans (PCDF) are chemically stable , It will accumulate in the organism, which is a highly toxic, carcinogenic, organic pollutant that will cause a lasting and cumulative impact on the ecosystem. Therefore, many countries now have more stringent environmental regulations for PCDD / PCDF emissions. [0003] Since it is not possible to eliminate pollution from the source, it is the only feasible way and method to eliminate the pollution caused by polychlorinated ...

Claims

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Application Information

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Patent Type & Authority Patents(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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