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High specific surface area alumina coating preparation method and coating prepared therefrom and metal carrier three-effect catalyzing device

An aluminum oxide, high specific surface area technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst supports, chemical instruments and methods, etc., can solve the problems of sintering, reducing the specific surface area characteristics of coatings, etc. Achieve the effect of improving distribution status, improving work efficiency, and increasing the probability of response

Inactive Publication Date: 2007-05-30
北京英泰世纪环境科技有限公司
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Problems solved by technology

[0006] An object of the present invention is to provide a method for preparing an aluminum oxide coating to solve the problem of sintering of the aluminum oxide coating after high-temperature roasting in practical applications and reduce the specific surface area characteristics of the coating

Method used

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Embodiment Construction

[0038] 1. Prepare raw materials:

[0039] Alumina, barium oxide, lanthanum-containing cerium-zirconium solid solution, organic alcohol copolymer surfactant, lanthanum nitrate, strontium nitrate, cobalt nitrate. Among them, alumina has a specific surface area of ​​200-250m 2 The commodity of / g, South Africa SASOL company has sale; Containing lanthanum cerium zirconium solid solution: Beijing Youyan rare earth company commercially available; Organic alcohol copolymer surfactant, the present embodiment adopts diethylene glycol copolymer; Above-mentioned various chemical The quality of materials were all analytically pure.

[0040] 2. Preparation process:

[0041] 2.1. Slurry preparation

[0042] Accurately weigh 240 parts of alumina powder, 20 parts of glacial acetic acid, 8 parts of barium oxide, and 210 parts of pure water according to the weight ratio, mix them evenly and place them in a high-speed grinder, grind at a high speed until the particle size is less than 20 micr...

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Abstract

The specific high surface area of alumind coating features in the paste preparation by grinding alumind and batching for pastes with 0.2-1% organic alcohol agglomerate surface activator, with even blending for use, coating said alumind to carrier surface, through drying, baking and aging treatment to make the coating. It also provides the alumind coating and metal carrier three functions catalysts. The coating is in crust, big in specific surface area, stable and reliable in performance.

Description

technical field [0001] The present invention relates to the preparation technology of aluminum oxide coating, in particular to a method for preparing aluminum oxide coating with high specific surface area and the coating prepared by the method, and the aluminum oxide coating produced by the method metal carrier three-way catalytic converter. Background technique [0002] Most of the catalysts need to be attached to a certain catalyst carrier for catalysis. In order to maximize the contact area between the catalyst and the catalytic substance, the carrier is required to have a larger specific surface area. [0003] Al2O3, that is, alumina coating, has a large specific surface area and is one of the most commonly used carrier media in catalyst preparation technology. Using alumina in different phases, catalyst coatings with different structures and compositions can be prepared. Commonly used alumina mainly includes α-type and γ-type, and the alumina used in the field of motor...

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J32/00B01J23/40F01N3/28
Inventor 潘陆陆石斌刘耀军
Owner 北京英泰世纪环境科技有限公司
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