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

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

Inactive Publication Date: 2005-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • 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 method for coating an active component on a honeycomb carrier with both ends open includes immersing one end of the honeycomb carrier with both ends open in the slurry containing the active component, applying a vacuum at the other end, making the slurry continuously pass through the pores of the carrier, and drying A carrier coated with a slurry, wherein the volume of the slurry passing through the pores of the carrier is 1.1-50 times the volume of the carrier, the applied vacuum makes the flow rate of the slurry flow through the pores of the carrier be 90-1800 ml / g carrier / min, the slurry After continuously passing through the pores of the carrier, use a gas with a pressure of 1-3 MPa and a flow rate of 8-13 km / min to purge from one end of the carrier to remove excess slurry in the carrier pores.

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 hone...

Claims

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Application Information

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Patent Type & Authority Patents(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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