Method for coating active component on cellular carrier with two open ends

A technology of active components and honeycomb carrier, which is applied in the field of coating active components on honeycomb carriers, can solve problems such as uneven coating, and achieve the effect of uniform coating, easy implementation, and fast coating speed

Inactive Publication Date: 2003-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of uneven coating in the prior art, and provide a method for coating active components on a honeycomb carrier with open ends at both ends.

Method used

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  • Method for coating active component on cellular carrier with two open ends
  • Method for coating active component on cellular carrier with two open ends

Examples

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example 1

[0029] This example illustrates the method provided by the invention.

[0030] Such as figure 1 As shown, a slurry 4 is added to the dipping tank 3 . The slurry 4 is made of pseudoboehmite (containing 32% by weight of alumina, produced by Qilu Catalyst Factory), zirconium oxychloride (ZrOCl 2 ·8H 2 O, produced by Beijing Chemical Plant), rare earth chloride (containing 44% by weight of mixed rare earth oxides, wherein lanthanum oxide accounts for 40% by weight of mixed rare earth oxides, cerium oxide accounts for 53% by weight of mixed rare earth oxides, and other rare earth oxides It is prepared by mixing chloroplatinic acid solution containing 0.02082 g / ml platinum, rhodium chloride solution containing 0.0041 g / ml rhodium and deionized water. This slurry 4 contains 22.5% by weight of alumina, 1.5% by weight of zirconia, 4.5% by weight of rare earth oxides (including 1.8% by weight of lanthanum oxide, 2.4% by weight of cerium oxide, and 0.3% by weight of other rare earth o...

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Abstract

A process for coating active component on the cellular carrier with two open ends includes such steps as immersing one end of said carrier in the active component slurry while applying vacuum to its another end for forcing the slurry to flow through the channels of carrier, scavenging by high-pressure gas for removing excess slurry from channels, and drying.

Description

technical field [0001] The invention relates to a method for coating an active component on a honeycomb carrier, more specifically, a method for coating an active component on a honeycomb carrier with two ends open. Background technique [0002] Automobile exhaust purification catalyst is an important means to deal with modern automobile exhaust and make its emission meet the requirements of environmental protection. This catalyst is composed of a honeycomb carrier and an active component coated on the carrier. The honeycomb carrier contains many parallel straight-through channels with both ends open, and the pore density on the cross section is 46.5-186.0 holes / cm 2 , the cross-sectional area of ​​each hole is 0.91-1.72mm 2 . The catalyst is obtained by coating the slurry containing active components on the carrier, and then drying the carrier coated with the slurry. [0003] US6,149,973 discloses a method for coating a cylindrical monolithic hon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94B01J35/02B01J37/02B05C7/04
Inventor 贺振富罗珍达志坚景振华蒋文斌邵潜陈蓓艳段启伟李燕秋李晓燕沈宁元李阳
Owner CHINA PETROLEUM & CHEM CORP
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