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Method of loading automobile tail gas purifying catalyst onto honeycomb carrier

A technology for purifying catalysts and automobile exhaust gas. It is used in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc. It can solve the problems of catalyst coating loss, easy cracking and peeling of coatings, etc. The effect of small loss and high volume at one time

Inactive Publication Date: 2004-12-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] We have found that in the method of loading catalyst provided by the prior art, the amount of catalyst is less at one time, and the resulting coating is easy to crack and peel off, resulting in the loss of the amount of catalyst coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] (1) Add deionized water to a 3000 ml beaker, add 50 grams of LaCl 3 ·7H 2 O (including La 2 o 3 16.28 g, Pr 6 o 11 8.5 grams) (chemically pure, produced by Beijing Chemical Plant), 80 grams of CeCl 3 ·6H 2 O (including CeO 2 38.816 grams) (chemically pure, produced by Beijing Chemical Plant), 70 grams of ZrOCl 2 ·8H 2 O (with Zr 2 o 3 26.768 grams, Y 2 o 3 5.93 g) (chemically pure, produced by Beijing Chemical Plant) to make it completely dissolved and the concentration of the solution is 12% by weight, adjust pH=9 with ammonia water (chemically pure, produced by Beijing Chemical Plant), stir at a constant temperature of 65° C. for 60 minutes, and wash with suction to contain water The wet filter cake with a rate of 50% is set aside.

[0026] (2) Get 437.7 grams of pseudo-boehmite (the alumina content is 33%, produced by Qilu Petrochemical Company Catalyst Factory) and add deionized water, stir and homogenize at 50°C for 30 minutes to obtain a homogene...

example 2

[0031](1) Add deionized water to a 3000 ml beaker, add 70 grams of LaCl 3 ·7H 2 O (including La 2 o 3 22.792 grams, Pr 6 o 11 11.9 g), 60 g ZrOCl 2 ·8H 2 O (with Zr 2 o 3 22.944 grams, Y 2 o 3 5.08 g) to completely dissolve the solution concentration of 18% by weight, adjust the pH=10.5 with sodium bicarbonate (chemically pure, produced by Beijing Chemical Factory), stir at a constant temperature of 80° C. for 110 minutes, and wash with suction to a wet filter with a moisture content of 70%. The cake is ready to use.

[0032] (2) Take 950.24 g of pseudo-boehmite and add deionized water, stir and homogenize at 80° C. for 30 minutes to obtain a uniform slurry with an alumina content of 23% by weight. Take out a part of 70% by weight of the slurry, adjust the pH of the remaining slurry to 4.0 with citric acid, then add the taken out slurry and the wet filter cake obtained above and stir at 80°C for 70 minutes; dry at 130°C 4 hours, 850 ° C roasting for 6 hours to ...

example 3

[0037] (1) Add deionized water to a 3000 ml beaker, add 60 grams of LaCl 3 ·7H 2 O (including La 2 o 3 16.28 g, Pr 6 o 11 8.5 grams) (chemically pure, produced by Beijing Chemical Plant), 70 grams of CeCl 3 ·6H 2 O (including CeO 2 38.816 grams) (chemically pure, produced by Beijing Chemical Plant), 65 grams of ZrOCl 2 ·8H 2 O (with Zr 2 o 3 26.768 grams, Y 2 o 3 5.93 g) (chemically pure, produced by Beijing Chemical Plant) to make it completely dissolved in a solution with a concentration of 12% by weight, adjust pH=11 with sodium hydroxide (chemically pure, produced by Beijing Chemical Plant), stir at a constant temperature of 75° C. for 60 minutes, and wash with suction The wet filter cake with a moisture content of 50% is used for later use.

[0038] (2) Get 437.7 grams of pseudo-boehmite (the alumina content is 33%, produced by Qilu Petrochemical Company Catalyst Factory) and add deionized water, stir and homogenize at 50°C for 30 minutes to obtain a hom...

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Abstract

The method of loading automobile tail gas purifying catalyst onto honeycomb carrier features that one kind of slurry of assistant modified composite alumina substrate, noble metal catalyst and surfactant solution is loaded onto honeycomb iolite carrier through water washing pre-treatment The catalyst has great once applied amount and less coating chap and peeling-off, and less catalyst loss.

Description

technical field [0001] The invention relates to a method for loading catalyst, and more particularly relates to a method for loading automobile exhaust purification catalyst on honeycomb carrier. Background technique [0002] With the promulgation and gradual strictness of my country's environmental protection laws and regulations, the installation of automobile exhaust purification catalysts is a very effective off-machine purification method to control automobile exhaust emissions. The effect of automobile exhaust purification is closely related to the bonding strength of the catalyst coating and the carrier. Only guarantee The catalyst coating is not easy to fall off, so that the precious metal attached to its surface can effectively catalyze the conversion of harmful substances into harmless substances. [0003] The pretreatment of the carrier is closely related to the durability of the catalyst coating. If the bonding strength between the carrier and the coating is low, ...

Claims

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Application Information

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IPC IPC(8): B01D53/94B01J35/04B01J37/02
Inventor 贺振富邵潜沈宁元李燕秋李晓燕李阳
Owner CHINA PETROLEUM & CHEM CORP
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