Catalyst for decomposing organic hazardous material and method for decomposing organic halides using the same

A technology of organic halides and catalysts, which is applied in the field of catalysts for harmful organic halides, can solve problems such as insufficient resistance and reduced catalytic activity, and achieve the effect of low cost and high decomposition activity

Inactive Publication Date: 2002-11-27
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 2. Another question is, due to SO 2 With the increase of oxidation activity, vanadium pentoxide is reduced and converted into water-soluble vanadyl sulfate (VOSO 4 , there are α-type crystals: α-VOSO 4 ), therefore, the catalytic activity decreases with the increase of use time
[0008] 3. Chlorides such as HCl and Cl when including chlorine gas 2 Included in the gas being processed or produced by a decomposition process, a change in mass occurs and catalytic activity decreases
[0010] However, the status quo is that catalysts containing vanadium pentoxide as the main active X is insufficient in the resistance of , so it is desirable to have a catalyst with higher activity and durability that can be provided at a lower cost

Method used

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Examples

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Embodiment

[0055] Hereinafter, although the present invention is more specifically described using examples and comparative examples, the present invention is not limited to these examples. EXAMPLES 1 TO 21 AND COMPARATIVE EXAMPLES 1 TO 22 EXAMPLES OF CATALYST PRODUCTION

[0056] (Catalyst A)

[0057] Ammonium metavanadate (50 g) was added to water and heated at 80°C to dissolve it, and 125 g of oxalic acid was added with stirring to reduce vanadium. Then, 57 grams of ammonium sulfate were added to this vanadium-containing solution, and 510 grams of anatase titanium dioxide and 260 grams of barium sulfate were added one by one. The obtained slurry solution was spray dried to obtain a powder. A small amount of water was added to the obtained powder, and the mixture was kneaded and extruded with an extruder into pellets with a diameter (?) of 3 mm and a length of 3 mm for molding. After drying the pellets obtained again, oven dry at 430°C to obtain Catalyst A, comprising 9% by weight of...

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Abstract

A catalyst for decomposing organic halides is characterized by comprising water-insoluble vanadyl sulfate or a composite catalyst comprising vanadyl sulfate, a specific oxide and a specific sulfate. This catalyst not only has excellent activity in decomposing organic halides, durability and resistance to SO2, but basically does not cause the oxidation of SO2 to SO3, and is also resistant to HCl, so it can be used for organic halides. The decomposition process has good efficiency and good durability, especially when dust and organic halides exist together, the gas to be treated contains SOx or HCl, or SOx or HCl is generated in the area to be treated.

Description

technical field [0001] The present invention relates to catalysts for decomposing organic harmful substances such as organic halides. More particularly, the present invention relates to a catalyst for decomposing harmful organic halides including dioxins in exhaust gas generated when municipal garbage or industrial waste is burned; or a method for treating plastic materials to render them harmless. Background technique [0002] It has recently been found that the exhaust gas from incinerators burning municipal and industrial waste or from equipment for gasifying and melting municipal and industrial waste contains organic harmful substances such as organic halogenated compounds, including dioxins and aromatic chlorides, which are considered precursors of organic halides. In addition, it has been pointed out that the exhaust gas from the heat treatment of plastic materials used for waste of household appliances contains organic harmful substances including brominated dioxins ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01J21/06B01J27/053B01J37/00B01J37/02
CPCB01D53/8662B01D2257/206B01D2257/2062B01D2257/2064B01J21/06B01J21/063B01J27/053B01J37/0009B01J37/0045B01J37/0201
Inventor 高须勋藤田坚嗣
Owner MITSUI CHEM INC
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