Mixed component material and preparation method thereof

A technology of mixing components and outer layer materials, applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as short board in high temperature aging resistance, and achieve good synergy, excellent performance and good function. The effect of material quality

Active Publication Date: 2017-11-17
SINOCAT ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CeO prepared by impregnation 2 -ZrO 2 High temperature aging resistance has always been a shortcoming

Method used

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  • Mixed component material and preparation method thereof
  • Mixed component material and preparation method thereof

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preparation example Construction

[0046] In a specific implementation case of the preparation scheme of the present invention, the method for preparing a mixed component material is used to prepare a composite material containing two or more components, including the following preparation steps:

[0047] In the first step, the saline solution of the bottom material, citric acid and deionized water are mixed, and the stirring is continued for 1-60 minutes. Ammonia solution (25 wt%) was added thereto to make pH = 4-10. Continue to stir for 0.5-10h and leave for 1-5 days. Suction filtration, washing with deionized water 1-4 times. Dry at 60-150°C for 1-12h, and treat at 200-600°C for 1-300min to obtain the pretreated material.

[0048] In the second step, the obtained pretreated material is placed in a container and stirred. Separately take the salt solution of the outer layer material, add it into the pretreatment material under stirring, and continue stirring for 1-60min. Ammonia solution (25 wt%) was added...

Embodiment 1

[0056] Prepare the bottom layer as Ce 0.33 Zr 0.67 o 2 , the outer layer is Ce 0.67 Zr 0.33 o 2 mixed component materials.

[0057] Get 69.0g zirconium carbonate and prepare zirconium nitrate solution with concentrated nitric acid (nitric acid content is 65wt%) dissolving, add cerium nitrate 51.5g in this solution under stirring, hydrogen peroxide (30% concentration) 15.4g, citric acid 10.0g and deionized water 450.0 g, and continued stirring for 10 min to obtain solution S1, in which Ce / Zr=1 / 2 (molar ratio). 150.0 g of ammonia solution (25 wt %) was added to S1 to make pH=9. Stirring was continued for 1h and left for 2 days. Suction filtration, washing with deionized water 3 times. Dry at 90°C for 5 hours, and pretreat at 300°C for 3 hours to obtain material S11. Material S11 is powder material. The resulting S11 was placed in a container and stirred.

[0058] In addition 30.4g zirconium carbonate is prepared zirconium nitrate solution with concentrated nitric acid...

Embodiment 2

[0062] Prepare the bottom layer as Ce 0.67 Zr 0.33 o 2 , the outer layer is Ce 0.33 Zr 0.67 o 2mixed component materials. Get 30.4g zirconium carbonate and prepare zirconium nitrate solution with concentrated nitric acid (nitric acid content is 65wt%) dissolving, add cerium nitrate 93.3g in this solution under stirring, hydrogen peroxide (30% concentration) 28g, citric acid 10.0g and deionized water 450.0g g, continue to stir for 10 min to prepare a solution S2, in which Ce / Zr=2 / 1 (molar ratio). 150.0 g of ammonia solution (25 wt %) was added to S2 to make pH=9. Stirring was continued for 1h and left for 2 days. Suction filtration, washing with deionized water 3 times. Dry at 90°C for 5 hours, and pretreat at 300°C for 3 hours to obtain material S21. The obtained S21 was placed in a container and stirred for 10 min. Another 69.0g zirconium carbonate is prepared zirconium nitrate solution with concentrated nitric acid (the nitric acid content is 65wt%) dissolving, in ...

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Abstract

The invention describes a mixed component material. The mixed component material comprises a base layer material particle component and an outer layer material particle component, and has a layered structure. The base layer material particle component is one of the following components or a composite component oxide of multiple following components: cerium, praseodymium, lanthanum and other rare earth metal oxides, zirconium-containing oxide, aluminum oxide, alkaline earth metal oxide, alkaline metal oxide, titanium oxide, silicon oxide and transition metal oxide. The outer layer material particle component has at least one layer, and is one of the following components or a composite component oxide of multiple following components: cerium, praseodymium, lanthanum and other rare earth metal oxides, zirconium oxide, alkaline earth metal oxide, alkaline metal oxide, titanium oxide, silicon oxide, and transition metal oxide. The mixed component material provided by the invention has the advantages of high oxygen storage capacity and good aging resistance, and can be used as a functional catalytic material for purification of exhaust contaminants.

Description

technical field [0001] The invention relates to a preparation method of a catalytic material for purifying exhaust gas. Its components can be rare earth metal oxides such as cerium, or zirconium oxides, aluminum oxides, alkaline earth metal oxides, alkali metal oxides, titanium oxides, silicon oxides, transition metal oxides or a mixture of the above combinations Component oxide materials. Background technique [0002] With the rapid development of the automobile industry, the problem of air pollution has also followed. The main gaseous pollutants of automobiles are CO, HC, and NO x Wait. Currently used exhaust gas purification catalysts can convert CO, HC, NO x Three pollutants are converted into non-toxic and harmless CO 2 and H 2 O and N 2 . There are mainly two kinds of catalytic materials currently used in catalysts, one is a high temperature resistant high specific surface material, and the other is an oxygen storage material. A common high temperature resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/10B01J37/02B01J37/08B01D53/94
CPCB01D53/945B01D2258/01B01J23/002B01J23/10B01J35/1014B01J37/031B01J37/088B01J2523/00B01J2523/31B01J2523/3712B01J2523/48B01J2523/3706B01J2523/25B01J2523/41
Inventor 陈山虎陈耀强刘屿剑李大成王金凤程永香李云陈启章
Owner SINOCAT ENVIRONMENTAL TECH
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