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Method for producing catalyst carrier material applicable to high-temperature environment

A catalyst carrier and high-temperature environment technology, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor high-temperature thermal stability, achieve high-temperature performance improvement, increase high-temperature specific surface area and high-temperature thermal stability performance, good catalytic effect

Active Publication Date: 2012-07-04
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 existing catalyst carrier materials for automobile exhaust purification, so that the catalyst can have a better catalytic effect and meet the international environmental protection requirements for automobile exhaust emissions, the present invention provides a catalyst suitable for high-temperature environments. The production method of the catalyst support material, the support produced by the method has excellent high-temperature specific surface area and high-temperature thermal stability

Method used

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  • Method for producing catalyst carrier material applicable to high-temperature environment

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Comparison scheme
Effect test

Embodiment 1

[0032] 1) Preparation of feed liquid:

[0033] Aluminum hydroxide and the sodium hydroxide that mass percent concentration is 35% are added in the reaction kettle and stirred and heated to boiling, and keep boiling state for 40 minutes, until aluminum hydroxide dissolves completely, then add pure water to adjust the [Al 2 o 3 ]=200g / l, [OH-]=6.0mol / L, filter after being cooled to 20~25 ℃, finish the preparation of sodium metaaluminate feed liquid; The feed molar ratio of described aluminum hydroxide and sodium hydroxide is 1 : 1.5;

[0034] Add silica sol and nitric acid to the reaction kettle and stir, add pure water to adjust the [H + ]=3.0mol / L, [SiO 2 ]=45.0g / l, complete the preparation of acidic silica sol feed liquid; The weight ratio of described silica sol and nitric acid is 1: 4.5, and the concentration of described nitric acid is 8mol / l, the silica quality in described silica sol The percentage content is 22%.

[0035] 2) Continuous precipitation:

[0036] Firs...

Embodiment 2

[0046] 1) Preparation of feed liquid:

[0047] Aluminum hydroxide and the sodium hydroxide that mass percent concentration is 32% are added in the reaction kettle and stirred and heated to boiling, and keep boiling state for 35 minutes, until aluminum hydroxide dissolves completely, then add pure water to adjust the [Al 2 o 3 ]=180g / l, [OH - ]=5.0mol / L, after being cooled to 30~35 ℃, filter, and complete the preparation of sodium metaaluminate feed liquid; The molar ratio of described aluminum hydroxide and sodium hydroxide is 1: 1.5;

[0048] Add silica sol and nitric acid to the reaction kettle and stir, add pure water to adjust the [H + ]=2.0mol / L, [SiO 2 ]=30.0g / l, complete the preparation of acidic silica sol feed liquid; The weight ratio of described silica sol and nitric acid is 1: 4, and the concentration of described nitric acid is 9mol / l, the silica quality in described silica sol The percentage content is 23%.

[0049] 2) Continuous precipitation:

[0050] First...

Embodiment 3

[0060] 1) Preparation of feed liquid:

[0061] Aluminum hydroxide and the sodium hydroxide that mass percentage concentration is 37% are added in the reaction kettle and stirred and heated to boiling, and keep boiling state for 50 minutes, until aluminum hydroxide dissolves completely, then add pure water to adjust the [Al 2 o 3 ]=220g / l, [OH - ]=7.0mol / L, filter after cooling to 30~35 ℃, complete the preparation of sodium metaaluminate feed liquid; The molar ratio of described aluminum hydroxide and sodium hydroxide is 1: 1.5;

[0062] Add silica sol and nitric acid to the reaction kettle and stir, add pure water to adjust the [H + ]=4.0mol / L, [SiO 2 ]=60.0g / l, complete the preparation of acidic silica sol feed liquid; The weight ratio of described silica sol and nitric acid is 1: 5, and the concentration of described nitric acid is 7mol / l, the silica quality in described silica sol The percentage content is 22%.

[0063] 2) Continuous precipitation:

[0064] First add ...

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Abstract

The invention discloses a method for producing catalyst carrier material applicable to high-temperature environment. The method comprises the steps of: enabling silicon oxide to enter an aluminum hydroxide crystal structure through a precipitation reaction in the production of a carrier so as to stabilize the crystal and further form a silicon oxide and aluminum hydroxide eutectic structure, and then preparing a silicon-aluminum oxide composite carrier material through high-temperature roasting. The carrier material produced by the method has excellent high-temperature specific surface area and high-temperature heat stability, and does not deform at a high temperature, and enables a catalyst to develop good catalysis effect so that automobile exhaust emission reaches the international environment requirement on automobile exhaust emission.

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 development of the economy and the progress of the society, people's living standards are constantly improving, and the use of automobiles is increasing day by day. The resulting automobile exhaust has gradually become the main source of air pollution. At present, the off-machine treatment of automobile exhaust is usually carried out by installing automobile exhaust purifiers. The catalyst plays a key role in the purifier, and the catalyst is attached to the catalyst carrier, and the performance of the catalyst carrier directly affects the catalytic effect. [0003] At present, the low-temperature specific surface area and pore volume of alumina, the catalyst carrier material for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/12B01J35/10B01D53/94
Inventor 李运奎孙浩
Owner WEIHAI PIDC NEW MATERIALS