Cerium zirconium aluminum based multiple oxide material and preparing method thereof

A composite oxide, cerium zirconium aluminum technology, applied in chemical instruments and methods, separation methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor anti-aging performance and improve anti-aging performance. , good oxygen storage performance, the effect of improving the specific surface area

Active Publication Date: 2010-06-23
苏州相城埭辰科技产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of the poor anti-aging performance of the oxygen storage material used in the three-way catalyst for automobile exhaust purification in the prior art, and provide a cerium-zirconium-aluminum-based composite oxide material with good anti-aging performance and its preparation method

Method used

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  • Cerium zirconium aluminum based multiple oxide material and preparing method thereof
  • Cerium zirconium aluminum based multiple oxide material and preparing method thereof
  • Cerium zirconium aluminum based multiple oxide material and preparing method thereof

Examples

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preparation example Construction

[0027] According to the preparation method provided by the present invention, the sintering conditions include a temperature of 450-800°C, preferably 450-600°C, and a sintering time of 1-10 hours, preferably 3-5 hours.

[0028] The morphology of composite oxide materials prepared by conventional co-precipitation method is mostly massive or granular, while the morphology of cerium-zirconium-aluminum-based composite oxide materials prepared according to the method provided by the present invention is spherical or nearly spherical, so the obtained cerium-zirconium-aluminum The specific surface area of ​​the fresh sample of aluminum matrix composite oxide material is obviously higher.

[0029] The cerium-zirconium-aluminum-based composite oxide material prepared by the invention can be used as an auxiliary agent or a carrier for a three-way catalyst for automobile tail gas purification.

Embodiment 1

[0032] This example is used to illustrate the cerium-zirconium-aluminum-based composite oxide material and its preparation method of the present invention.

[0033] According to the composition of Al in the cerium-zirconium-aluminum matrix composite oxide material in Table 1 2 o 3 , CeO 2 , ZrO 2 、La 2 o 3 , Y 2 o 3 content, calculate the Y 2 o 3 And the weight of the precursor pseudo-boehmite (aluminum oxide content 57% by weight, Shandong Aluminum Plant), cerium nitrate, zirconium nitrate, and lanthanum nitrate of each oxide. Add 65% by weight of concentrated nitric acid dropwise to the above calculated amount of Y 2 o 3 until completely dissolved to obtain a nitrate solution of yttrium. The nitrate solution of yttrium obtained above and the calculated amount of pseudoboehmite, cerium nitrate, zirconium nitrate, and lanthanum nitrate were added to a 1000 ml three-necked flask, and dissolved in distilled water to form a total concentration of metal ions of 0.2mol / L...

Embodiment 2

[0038] This example is used to illustrate the cerium-zirconium-aluminum-based composite oxide material and its preparation method of the present invention.

[0039] According to the composition of Al in the cerium-zirconium-aluminum matrix composite oxide material in Table 1 2 o 3 , CeO 2 , ZrO 2 、La 2 o 3 and Eu 2 o 3 content, calculated Eu 2 o 3 And the weight of the precursor pseudo-boehmite (aluminum oxide content 57% by weight, Shandong Aluminum Plant), cerium nitrate, zirconium nitrate, and lanthanum nitrate of each oxide. Add 65% by weight of concentrated nitric acid dropwise to the above calculated amount of Eu 2 o 3 until completely dissolved to obtain a nitrate solution of europium. Add the nitrate solution of europium obtained above and the calculated amount of pseudo-boehmite, cerium nitrate, zirconium nitrate, and lanthanum nitrate into a 1000 ml three-necked flask, and dissolve with distilled water to make a total concentration of metal ions of 0.2mol / ...

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Abstract

The present invention provides cerium zirconium aluminum based multiple oxide material and a preparing method thereof, wherein on the basis of the total amount of the cerium zirconium aluminum based multiple oxide material, the cerium zirconium aluminum based multiple oxide material is composed of the following components by weight: 25 to 70 shares of aluminum oxide, 20 to 60 shares of cerium oxide, 5 to 25 shares of zirconium oxide, 2 to 4.9 shares of lanthanum oxide and 2 to 15 shares of stable addition agent which is one or more oxides selected from Y, Eu, Gd and Sm. The cerium zirconium aluminum based multiple oxide material has high specific surface area. After the cerium zirconium aluminum based multiple oxide material is roasted in 450 DEG C to 550 DEG C for two to four hours, the specific surface area is all larger than 100m2/g; after the cerium zirconium aluminum based multiple oxide material is roasted in 1000 DEG C for ten hours, the specific surface area at least can reach60 m2/g; after the cerium zirconium aluminum based multiple oxide material is roasted in 1100 DEG C for five hours, the specific surface area at least can reach 40m2/g. thus, the cerium zirconium aluminum based multiple oxide material is superior to the anti-aging performance of multiple oxide material of the prior art, and can be used as an addition agent or carrier for vehicle tail gas purifying three-way catalyst.

Description

technical field [0001] The invention relates to a composite oxide material, in particular to a cerium-zirconium-aluminum-based composite oxide material and a preparation method thereof. Background technique [0002] With the rapid development of our country's economy and the rapid increase of the number of automobiles, automobile exhaust emissions have become a major source of air pollution, especially urban air pollution. Therefore, automobile exhaust purification has become an important aspect of environmental pollution prevention and control. As the country pays more and more attention to environmental pollution, local governments have also introduced more stringent exhaust emission standards, which requires that the purification effect of automobile exhaust must be improved. [0003] At present, precious metal three-way catalysts are often used as automobile exhaust purification catalysts. The precious metal three-way catalysts are mainly composed of honeycomb ceramic ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/08B01D53/94
Inventor 周舟菅永喜
Owner 苏州相城埭辰科技产业发展有限公司
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