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A kind of aluminum silicon lanthanum composite oxide powder material and preparation method thereof

A technology of composite oxides and powder materials, applied in chemical instruments and methods, silicon oxide, separation methods, etc., to achieve the effect of simple preparation process and low price and cost

Active Publication Date: 2020-07-03
HUNAN JIANTE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an aluminum-silicon-lanthanum composite oxide powder material and its preparation method, which solves the problem of the purification efficiency of the catalyst for exhaust gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one: (1) mixed tetraethyl orthosilicate after hydrolysis and aluminum nitrate solution, Al in this mixed solution and Si The mol ratio is 2.5:1, controls Al in the mixed solution Concentration is 0.3mol / L;

[0019] (2) determine the La(NO3)3 amount with La2O3 content as the ratio of aluminum silicon oxide 3wt.%, and be mixed with concentration and be that 0.1mol / LLa(NO3)3 aqueous solution joins tetraethyl orthosilicate and aluminum nitrate in the mixture.

[0020] (3) Add 0.5wt.% PEG4000 to the mixture;

[0021] (4) Under strong stirring, ammonia water is added dropwise to the mixed solution until the pH value reaches 9, so that the aluminum, silicon and lanthanum ions in the mixed solution are completely precipitated;

[0022] (5) Aging the mixed solution that has formed a precipitate in a water bath at 70°C for 1 hour, then washing and filtering to separate the precipitate, and drying the precipitate at 110°C for 24 hours;

[0023] (6) The precipitate was...

Embodiment 2

[0025] Embodiment two: (1) mixed the hydrolyzed tetraethyl orthosilicate and the aluminum nitrate solution, the molar ratio of Al3+ and Si4+ in the mixed solution was 3:1, and the concentration of Al3+ in the mixed solution was controlled to be 0.3mol / L;

[0026] (2) determine the La(NO3)3 amount with La2O3 content as the ratio of aluminum silicon oxide 3wt.%, and be mixed with concentration and be that 0.1mol / LLa(NO3)3 aqueous solution joins tetraethyl orthosilicate and aluminum nitrate in the mixture.

[0027] (3) Add 0.5wt.% PEG4000 to the mixture;

[0028] (4) Under strong stirring, ammonia water is added dropwise to the mixed solution until the pH value reaches 9, so that the aluminum, silicon and lanthanum ions in the mixed solution are completely precipitated;

[0029] (5) Aging the mixed solution that has formed a precipitate in a water bath at 70°C for 1 hour, then washing and filtering to separate the precipitate, and drying the precipitate at 110°C for 24 hours;

...

Embodiment 3

[0032] Embodiment three: (1) mixed the hydrolyzed tetraethyl orthosilicate and aluminum nitrate solution, Al in the mixed solution and Si The molar ratio is 3.5:1, controls the Al in the mixed solution Concentration is 0.3mol / L;

[0033] (2) determine the La(NO3)3 amount with La2O3 content as the ratio of aluminum silicon oxide 3wt.%, and be mixed with concentration and be that 0.1mol / LLa(NO3)3 aqueous solution joins tetraethyl orthosilicate and aluminum nitrate in the mixture.

[0034] (3) Add 0.5wt.% PEG4000 to the mixture;

[0035] (4) Under strong stirring, ammonia water is added dropwise to the mixed solution until the pH value reaches 9, so that the aluminum, silicon and lanthanum ions in the mixed solution are completely precipitated;

[0036] (5) Aging the mixed solution that has formed a precipitate in a water bath at 70°C for 1 hour, then washing and filtering to separate the precipitate, and drying the precipitate at 110°C for 24 hours;

[0037] (6) The precipitat...

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Abstract

The invention relates to a new material, in particular to an aluminum-silicon-lanthanum composite oxide powder material and a preparation method thereof; the method includes the following steps: A: first hydrolyze ethyl orthosilicate, and then add aluminum nitrate solution and rare earth Lanthanum nitrate solution to obtain a mixed solution; B: Add 0.5wt% polyethylene glycol as a dispersant to the mixed solution; C: Stir; D: Aging; E: Drying. The preparation process is simple and the price of raw materials is low. Finally, a base material for automobile exhaust gas purification catalyst coatings that maintains a high specific surface area at high temperatures can be prepared, which will provide a base material with a higher specific surface area for automobile exhaust gas catalytic coatings and improve the performance of automobiles. Exhaust gas catalytic purification efficiency and reduce the use of precious metals.

Description

technical field [0001] The invention relates to new materials, in particular to an aluminum-silicon-lanthanum composite oxide powder material and a preparation method thereof. Background technique [0002] The use of three-way catalysts to decompose harmful substances in automobile exhaust is a relatively mature technology for controlling automobile exhaust pollution. This technology is to disperse precious metals such as rhodium, platinum and other salts or micron and nano particles such as rhodium and platinum, which have good catalytic and purification effects on automobile exhaust, in the ceramic particle slurry as the catalyst coating matrix and coat it on the surface of the catalyst carrier. After sintering at high temperature, the slurry forms a coating on the surface of the catalyst carrier that has a catalytic and purifying effect on automobile exhaust. In the process of catalyst catalytic decomposition of harmful substances in automobile exhaust, the specific surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J35/10B01D53/94C01B33/113
CPCB01D53/94B01J23/002B01J23/10B01J2523/00C01F17/32B01J35/615B01J2523/31B01J2523/3706B01J2523/41
Inventor 姚小刚刘颖戴晨毅
Owner HUNAN JIANTE TECH CO LTD