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Process for low-temperature catalytically burning chlorinated aliphatics

A chlorinated aliphatic hydrocarbon, low-temperature catalysis technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of easy loss of catalyst active components, low catalytic combustion activity, and short catalyst life, etc. The route is convenient and practical, the preparation process is simple, and the catalyst life is long.

Inactive Publication Date: 2008-07-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The catalysts used for the catalytic combustion elimination of the above-mentioned chlorinated volatile hydrocarbons all have more or less shortcomings, such as low catalytic combustion activity, polychlorinated hydrocarbons are produced during the catalytic combustion process, which is easy to cause secondary pollution, and the catalyst activity group Parts are easy to lose, catalyst life is short

Method used

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  • Process for low-temperature catalytically burning chlorinated aliphatics
  • Process for low-temperature catalytically burning chlorinated aliphatics
  • Process for low-temperature catalytically burning chlorinated aliphatics

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Put 100g of commercially available cerium nitrate in a heating furnace, program temperature rise in air atmosphere, 1 ℃ per minute, rise to 180 ℃, keep warm for 2 hours; then program temperature rise, 10 ℃ per minute, raise the temperature to 550 ℃, After 4 hours of heat preservation, CeO can be prepared 2 catalyst.

Embodiment 2

[0035] Put 100g of commercially available lanthanum nitrate in a heating furnace, program temperature rise in air atmosphere, 1 °C per minute, rise to 180 °C, keep warm for 2 hours; then program temperature increase, 10 °C per minute, raise the temperature to 550 °C, After 4 hours of heat preservation, La 2 o 3 catalyst.

Embodiment 3

[0037] Commercially available 50g cerium nitrate (Ce(NO 3 ) 3 )·6H 2 O and 6g copper nitrate Cu(NO 3 ) 2 )·3H 2O was dissolved in 500ml of ionized water, and the solution was placed in a constant temperature water bath at 50°C and stirred for 0.5h; then 200ml of 0.5N oxalic acid aqueous solution was added dropwise at a flow rate of 1ml per minute, stirring continuously during the process, and after the oxalate precipitated completely, Continue to stir at 50°C for 2-4h, stand still, filter with suction, wash twice with 500ml of hot deionized water, add 500ml of absolute ethanol to wash once, filter with suction, then dry in an oven at 100°C for 24h, and move to In the roasting furnace, the temperature is programmed in the air atmosphere, 1 ° C per minute, raised to 180 ° C, and kept for 2 hours; the temperature is programmed again, 10 ° C per minute, the temperature is raised to 550 ° C, and when kept for 4 hours, 10CuO-90CeO can be obtained 2 (by weight CuO:CeO 2 1:9) ca...

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Abstract

The invention relates to a method for low-temperature catalyzing and burning chloro aliphatic hydrocarbon, wherein it is characterized in that: with catalyst, burning the air with water and the mixture with chlorine volatile aliphatic hydrocarbon; said catalyst is formed by rare-earth oxide, or rare-earth oxide and one or several oxides of order-variable transient metals; the doping amount of said transient metal is 0.1-30wt% at oxide; the invention has simple preparation, without side product and secondary pollution; and the catalyst has long service, to be completely catalyze and burn halide organic compound, with low cost.

Description

technical field [0001] The invention relates to a method for low-temperature catalytic combustion of chlorinated aliphatic hydrocarbons, in particular to a catalyst for low-temperature catalytic combustion of chlorinated aliphatic hydrocarbons. Background technique [0002] Chlorine-containing volatile hydrocarbons can not only cause serious harm to human health, but also cause lasting and cumulative effects on biological systems, and can destroy the atmospheric ozone layer. The 12 top persistent organic pollutants listed in the United Nations Environment Program International Treaty are all chlorine-containing organic compounds. [0003] Chlorine-containing volatile hydrocarbons are divided into chlorinated aromatic hydrocarbons, such as chlorobenzene and dichlorobenzene, and chlorinated non-aromatic aliphatic hydrocarbons, such as dichloroethane, trichloroethylene, tetrachloroethylene, methyl chloride and polychloromethane etc. The former is produced in bleaching of wood ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/70B01D53/86
Inventor 王幸宜戴启广李到卢冠忠
Owner EAST CHINA UNIV OF SCI & TECH
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