Method for degrading aryl halide organic pollutants

A technology for organic pollutants and halogenated aromatic hydrocarbons, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc. Low cost, low price, avoiding the effect of high temperature and high energy consumption

Inactive Publication Date: 2012-07-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, more researchers improve the effect of low-temperature heat treatment technology by adding catalysts, and have achieved a lot of research results, but the choice of catalysts is mostly limited to heavy metals and noble metals, and the cost and environmental friendliness of catalysts limit the application of catalysts. , there are still a lot of scientific and technical problems to be solved in terms of simultaneous solidification of heavy metals, reduction of energy consumption and selection of reaction atmosphere.
For example, copper and its metal oxides are better catalysts for dechlorination of persistent organic pollutants, but there is a problem of secondary pollution and higher requirements for temperature control, because copper and its metal oxides are at 250-350 ℃ can promote the synthesis of dioxins

Method used

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  • Method for degrading aryl halide organic pollutants
  • Method for degrading aryl halide organic pollutants
  • Method for degrading aryl halide organic pollutants

Examples

Experimental program
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Effect test

preparation example 1

[0031] 5.12g Mg(NO 3 ) 2 ·6H 2 O and 15.01g Al(NO 3 ) 2 9H 2 O was dissolved in 200ml of distilled water, and then 0.6mol / l NH 4 Add the OH solution drop by drop into the above mixed solution, and keep stirring until the pH of the solution reaches about 8, and precipitates in the solution, then filter the solution, wash the filter with distilled water three times, put it in an oven, and bake it at 100°C for 24 hours to dry. The dried product is put into a muffle furnace and roasted at 600°C for 1 hour, and the product is a catalyst for the degradation of halogenated aromatics at low temperature, which is a magnesium-aluminum catalyst.

preparation example 2

[0033] 5.12g Mg(NO 3 ) 2 ·6H 2 O and 15.01g Al(NO 3 ) 2 9H 2 O was dissolved in 200ml of distilled water, and then 0.6mol / l NH 4 Add the OH solution drop by drop into the above mixed solution, and keep stirring until the pH of the solution reaches about 8, and precipitates in the solution, then filter the solution, wash the filter with distilled water three times, put it in an oven, and bake it at 100°C for 24 hours to dry. The dried product is put into a muffle furnace and roasted at 400°C for 1 hour, and the product is a catalyst for low-temperature degradation of halogenated aromatics, which is a magnesium-aluminum catalyst.

preparation example 3

[0035] 5.12g Mg(NO 3 ) 2 ·6H 2 O and 15.01g Al(NO 3 ) 2 9H 2 O was dissolved in 200ml of distilled water, and then 0.6mol / l NH 4Add the OH solution drop by drop into the above mixed solution, and keep stirring until the pH of the solution reaches about 8, and precipitates in the solution, then filter the solution, wash the filter with distilled water three times, put it in an oven, and bake it at 100°C for 24 hours to dry. The dried product is put into a muffle furnace and roasted at 900°C for 1 hour, and the product is a catalyst for the degradation of halogenated aromatics at low temperature, which is a magnesium-aluminum catalyst.

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Abstract

The invention relates to treatment of aryl halide organic pollutants, in particular to a method for degrading the aryl halide organic pollutants. An active ingredient spinel of a catalyst has the chemical general formula of AB2O4, wherein A is one or two of Mg2+, Ni2+, Ba2+, Zn2+, Cu2+, Ca2+ and Fe2+; and B is Al3+ or Fe3+. A method for preparing the catalyst comprises the following steps of: synthesizing hydrotalcite-like compounds by using a coprecipitation method; and filtering and drying, and roasting at the temperature of between 400 and 900 DEG C. The prepared catalyst is future ground and mixed with aryl halides-containing pollutants, or further processed and formed and put in an aryl halides-containing environment to realize catalytic degradation at the temperature of between 200 and 450 DEG C. The method has the advantages of low cost, simple equipment, low energy consumption, high efficiency and the like, and the production and using processes of the catalyst have the advantage of good environmental protection.

Description

technical field [0001] The invention relates to the treatment of organic pollutants of halogenated aromatic hydrocarbons, in particular to a catalyst for catalytically degrading halogenated aromatic hydrocarbons at low temperature, a preparation method and application thereof. Background technique [0002] Halogenated aromatic compounds are chemical raw materials, organic synthesis intermediates and organic solvents widely used in chemical industry, medicine, leather, electronics and other industries. Halogenated aromatic compounds have strong lipophilicity and are easy to accumulate in organisms. They are a kind of environmental pollutants with "carcinogenic, teratogenic, mutagenic" effects and endocrine disrupting toxicity. Specifically, chlorobenzenes have certain narcotic properties, damage the central nervous system, and also have certain damages to organs such as liver and kidney; while bromobenzenes strongly stimulate the skin and mucous membranes and are corrosive; p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/00A62D3/34B01J21/10B01J21/04B01J23/02B01J23/78B01J23/72B01J37/03B01J37/08A62D101/28A62D101/22
Inventor 陈吉平樊芸张海军倪余文卢宪波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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