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Production method of high temperature-resistant catalyst carrier material for automobile exhaust purification

A technology for catalyst carrier and exhaust gas purification, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problems of poor high temperature thermal stability, etc., and achieve excellent high temperature specific surface area, excellent high temperature thermal stability, good The effect of the catalytic effect

Inactive Publication Date: 2012-07-11
WEIHAI PIDC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of poor high-temperature thermal stability of the carrier material of the current domestic automobile exhaust purification catalyst, make the catalyst have a better catalytic effect, and meet the international environmental protection requirements for automobile exhaust emissions, the invention provides a high-temperature-resistant catalyst for automobile exhaust purification. Catalyst carrier material production method, the carrier produced by this method has excellent high temperature specific surface area and high temperature thermal stability, suitable pore volume, pore size and particle size distribution

Method used

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  • Production method of high temperature-resistant catalyst carrier material for automobile exhaust purification

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Experimental program
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Effect test

Embodiment 1

[0028] 1) Preparation of feed liquid

[0029] Add aluminum hydroxide and a sodium hydroxide solution with a mass percentage concentration of 35% into the reaction kettle, stir and heat to boiling, and keep boiling for 40 minutes until the aluminum hydroxide is completely dissolved to obtain a sodium metaaluminate feed liquid, and then Add pure water to adjust the [Al 2 o 3 ] at a concentration of 200g / l, [OH - ] at a concentration of 6.0mol / l, cooled to 35-40°C and then filtered to complete the preparation of the first feed liquid;

[0030] Add nitric acid to the reaction kettle and stir, add pure water to adjust the [H + ] concentration is 3.0mol / l, completes the preparation of the second feed liquid;

[0031] 2) Continuous precipitation

[0032] First add hot pure water at 50-55°C to the overflow position of the reactor, and then control the sodium metaaluminate feed liquid (first feed liquid) and nitric acid feed liquid (second feed liquid) through a metering device. ...

Embodiment 2

[0045] 1) Preparation of feed liquid

[0046] Add aluminum hydroxide and a sodium hydroxide solution with a mass percentage concentration of 32% into the reactor, stir and heat to boiling, and keep boiling for 30 minutes until the aluminum hydroxide is completely dissolved to obtain a sodium metaaluminate feed liquid, and then Add pure water to adjust the [Al 2 o 3 ] concentration of 180g / l, [OH - ] at a concentration of 5.0mol / l, cooled to 20-25°C and then filtered to complete the preparation of the first feed liquid;

[0047] Add nitric acid to the reaction kettle and stir, add pure water to adjust the [H+ ] concentration is 2.5mol / l, completes the preparation of the second feed liquid;

[0048] 2) Continuous precipitation

[0049] First add hot pure water at 45 to 50°C to the overflow position of the reactor, and then control the flow rate ratio of sodium metaaluminate feed liquid and nitric acid feed liquid to 1:2 through a metering device, and the step 1) The sodium ...

Embodiment 3

[0062] 1) Preparation of feed liquid

[0063] Add aluminum hydroxide and a sodium hydroxide solution with a mass percentage concentration of 37% into the reactor, stir and heat to boiling, and keep boiling for 50 minutes until the aluminum hydroxide is completely dissolved to obtain a sodium metaaluminate feed liquid, and then Add pure water to adjust the [Al 2 o 3 ] concentration is 210g / l, [OH - ] at a concentration of 6.5mol / l, cooled to 30-40°C and then filtered to complete the preparation of the first feed liquid;

[0064] Add nitric acid to the reaction kettle and stir, add pure water to adjust the [H + ] The concentration is 3.5mol / l, completes the preparation of the second feed liquid;

[0065] 2) Continuous precipitation

[0066] First add hot pure water at 45-55°C to the overflow position of the reactor, and then control the flow rate ratio of the sodium metaaluminate feed liquid and the nitric acid feed liquid to 1:2 through a metering device. The sodium metaa...

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Abstract

The invention discloses a production method of a high temperature-resistant catalyst carrier material for automobile exhaust purification. The catalyst carrier material is a barium aluminum oxide composite carrier material which is produced by coating the surface of aluminum hydroxide crystals with a barium acetate solution by spray impregnation, followed by high-temperature calcination. With the production method, the carrier material is excellent in high-temperature specific surface area and high-temperature stability, and can meet the requirements for preventing deformation of catalyst carriers and giving full play to catalysts under high-temperature conditions. Accordingly, with the catalyst carrier material, the automobile exhaust emissions meet the present international standards for automobile exhaust emissions.

Description

technical field [0001] The invention relates to a production method of a catalyst carrier material, in particular to a production method of a catalyst carrier material suitable for high-temperature environments used in the purification of vehicle exhaust gas. Background technique [0002] With the sharp increase in the number of automobiles in our country, the pollution caused by automobile exhaust to the environment is also becoming more and more serious. As early as the 1960s, foreign countries have carried out research and development on automobile pollution control technology, and it has reached the practical stage at present. Existing studies have shown that harmful gases can be purified by improving the performance and production process of the catalyst and its carrier, improving the combustion technology of the automobile internal combustion engine and the exhaust system of the catalyst. Among them, installing a catalytic converter to treat harmful gases is the most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/02B01D53/94
Inventor 李运奎孙浩
Owner WEIHAI PIDC NEW MATERIALS
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