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Method for preparing slurry containing aluminum oxide

An alumina and slurry technology, applied in chemical instruments and methods, catalyst carriers, catalyst protection, etc., can solve the problems of poor coating effect, difficult adjustment of viscosity and solid content, avoid slurry deterioration, and achieve good adjustment effect. , performance-enhancing effect

Active Publication Date: 2008-07-02
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages in the prior art that the viscosity and solid content of the alumina-containing slurry are difficult to adjust, resulting in poor coating effect and small amount of loading at one time, and to provide a slurry that meets the requirements of viscosity and solid content at the same time. , the coating effect is good, and the preparation method of a large amount of alumina-containing slurry is loaded at one time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example is used to illustrate the preparation method of the catalyst alumina coating slurry for purifying automobile exhaust provided by the present invention.

[0032] Preparation of slurry

[0033] (1) 352 grams of pseudo-boehmite (containing 299 grams of alumina) (Shandong Chalco), 133 grams of cerium-zirconium mixed oxide (CZ280, Shandong Zibo Huaqing powder), 15 grams of anatase Titanium dioxide (Japan Ishihara, R-908), 15 grams of concentration is 2% by weight of hydroxymethyl cellulose solution (containing 0.3 gram of hydroxymethyl cellulose with a molecular weight of 10000, Shenzhen Jinsenyuan Chemical Industry, CMC), add 500 milliliters to remove Ionized water was mixed, stirred evenly and ball milled at a speed of 200 rpm for 5 hours to obtain a feed liquid with a solid content of 44% by weight and an average particle size of 9 microns;

[0034] (2) the preparation concentration is 50% by weight of Al(NO 3 ) 3 solution, Ce(NO 3 ) 4 solution, Zr(NO 3...

Embodiment 2

[0050] This example is used to illustrate the preparation method of the catalyst alumina coating slurry for purifying automobile exhaust provided by the present invention.

[0051] Preparation of slurry

[0052] (1) 280 grams of pseudo-boehmite (Shandong China Aluminum) (containing 238 grams of alumina), 108 grams of cerium-zirconium-lanthanum composite oxide (Shandong Zibo Huaqing powder), 12 grams of anatase Titanium dioxide (Japan Ishihara, R-908), 9.2 grams of concentration is 10% by weight of polyvinyl alcohol solution (containing 0.92 grams of polyvinyl alcohol with a molecular weight of 30000, Guangzhou Nanfang Chemical Glass Co., PVA-124), plus 550 milliliters of deionized Mixed with water, stirred evenly with 300 rpm, ball milled for 8 hours at a speed of 300 rpm, to obtain a feed liquid with a solid content of 37% by weight and an average particle size of 9 microns;

[0053] (2) the preparation concentration is 60% by weight of Ce(NO 3 ) 4 solution, La(NO 3 ) 3 ...

Embodiment 3

[0060] This example is used to illustrate the preparation method of the catalyst alumina coating slurry for purifying automobile exhaust provided by the present invention.

[0061] Preparation of slurry

[0062](1) 400 grams of pseudo-boehmite (Shandong Chalco) (containing 340 grams of alumina), 90 grams of cerium-zirconium-barium composite oxide (Shandong Zibo Huaqing powder), 10 grams of anatase Titanium dioxide (Ishihara, Japan, R-908), 11 grams of concentration is 5% by weight of polyvinyl alcohol solution (containing 0.55 grams of molecular weight is 30000 polyvinyl alcohol, Guangzhou South Chemical Glass Company, PVA-124), add 500 milliliters of deionized water Mixing, stirring evenly with 300 rpm, ball milling at a speed of 5 hours to obtain a feed liquid with a solid content of 44% by weight and an average particle size of 7.5 microns;

[0063] (2) the preparation concentration is 50% by weight of Al(NO 3 ) 3 solution, the concentration is 50% by weight of Ce(NO 3 ...

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Abstract

The invention provides a preparation method used for preparing sizing agent containing alumina of auto-exhaust purification catalyst, which comprises that pseudo-boehmite, TiO2, oxygen storage materials, active metal nitrate and surfactant are mixed evenly with water, thus obtaining the sizing agent containing the alumina; wherein, the method also comprises that acetate solution is added into the sizing agent containing the alumina so as to adjust viscosity of the sizing agent. The preparation method provided by the invention used for preparing the sizing agent containing the alumina of auto-exhaust purification catalyst has good effect of coating and more one-time loading weight, and a coating layer made of the prepared sizing agent has good binding force with matrix and good resistance to heat shocks, and crazes and drops off uneasily.

Description

technical field [0001] The invention relates to a preparation method of alumina-containing slurry. Background technique [0002] In recent years, with the development of the economy and the enhancement of people's social awareness, people have paid more and more attention to the environment, especially the control of air pollution. Vehicle emissions are the main source of air pollution. Measures have been taken to minimize the exhaust of vehicles. Pollution is urgent. The three-way catalytic converter has become the most important key technology to control automobile emission pollution. It can convert three harmful gases CO, HC, and NO in automobile emissions. x At the same time, it is greatly reduced. [0003] At present, the preparation method of three-way catalyst is usually based on cordierite honeycomb ceramics, loaded with a layer of alumina coating with sufficient specific surface area to support active noble metal components. [0004] CN1160599 discloses a method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00B01J32/00B01J21/04
Inventor 欧玲刘武略丁大勇王胜杰
Owner BYD CO LTD
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