Method for loading coating on sponge metal and coating prepared by same

A technology of sponge metal and coating, applied in chemical instruments and methods, catalyst activation/preparation, catalyst carrier, etc., to achieve the effect of simple production process and equipment requirements, and firm combination

CN103084218AInactive Publication Date: 2013-05-08JIANGSU PIONEER TECH
9 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-05-08
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a method for loading a coating on sponge metal and a sponge metal carrier coating prepared by the same. The method performs gradual transition through surface pretreatment, oxidation treatment, alumina sol loading, drying, aluminum oxide slurry loading and drying and baking processes, thereby preparing a sponge metal carrier coating in firm combination; the coating has high firmness, and the preparation technology is simple; and one or several metal oxides or salts can be loaded as necessary, and the coating is a catalyst carrier coating which can be applied to catalytic reaction. The invention also relates to a method for loading a catalyst on sponge metal and a catalyst prepared by the same; and an iron-chromium-aluminum sponge metal carrier catalyst can be prepared by loading precious metal active components on the carrier coating.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for loading a coating on a sponge metal and a sponge metal carrier coating prepared by the method. The invention also relates to a method for loading a catalyst on a sponge metal and the catalyst prepared by the method, belonging to metal Technical field of washcoat preparation. Background technique

[0002] Since 1988, the West German Metal Association (VDM) first applied metal mesh flake carrier and metal honeycomb carrier catalyst to the catalytic conversion of automobile exhaust, metal carrier catalyst and technology have made great progress in the field of automobile exhaust purification.

[0003] Sponge metal is loose and porous. It is a kind of metal similar to sponge. It is a porous metal. Compared with honeycomb metal, the specific surface area of ​​sponge metal is greatly increased, the adsorption capacity is large, the air permeability is good, the chemical activity is high, and the carbon C content of spong...

Examples

Embodiment 1

[0051] A preparation method for loading a coating on a sponge metal:

[0052] (1) Metal surface pretreatment: Soak the iron-chromium-aluminum (0CR21AL6) sponge metal sheet in acid or alkali solution for 1 hour, and then wash it in deionized water for 10 minutes to remove oil, oxides and some impurities on the metal surface.

[0053] (2) Oxidation treatment: After the surface treatment, the iron-chromium-aluminum sponge metal is dried at 120°C for 2 hours, and then the sponge metal sheet is roasted at a high temperature of 550°C for 5 hours.

[0054] (3) Loading aluminum sol: load aluminum sol on the iron-chromium-aluminum (0CR21AL6) sponge metal sheet after high temperature oxidation, and dry at 100°C for 1 hour to prepare the iron-chromium-aluminum sponge metal aluminum sol coating;

[0055] (4) Loading lanthanum-modified alumina slurry: load lanthanum-modified alumina (La-Al2O3) slurry on the aluminum sol coating, dry at 120°C for 2 hours, then raise the temperature to 550°C...

Embodiment 2

[0060] A preparation method for loading a coating on a sponge metal:

[0061] (1) Metal surface pretreatment: Soak the iron-chromium-aluminum (0CR21AL6) sponge metal sheet in acid or alkali solution for 2 hours, and then wash it in deionized water for 15 minutes to remove oil, oxides and some impurities on the metal surface.

[0062] (2) Oxidation treatment: After the surface treatment, the iron-chromium-aluminum sponge metal is dried at 120°C for 2 hours, and then the sponge metal sheet is fired at a high temperature of 1050°C for 1 hour.

[0063] (3) Loading aluminum sol: load aluminum sol on the iron-chromium-aluminum (0CR21AL6) sponge metal sheet after high temperature oxidation, and dry at 120°C for 1.5h to prepare the iron-chromium-aluminum sponge metal aluminum sol coating;

[0064] (4) Loading composite lanthanum-modified alumina (La-Al2O3) and mixed metal oxide slurry: loading composite lanthanum-modified alumina (La-Al2O3) and mixed metal oxides on the aluminum sol c...

Embodiment 3

[0080] A preparation method for loading a coating on a sponge metal:

[0081] (1) Metal surface pretreatment: soak iron-chromium-aluminum (0CR21AL6) sponge metal sheet in acid or alkali solution for 0.8h, and then wash in deionized water for 8min to remove oil, oxides and some impurities on the metal surface.

[0082] (2) Oxidation treatment: After the surface treatment, the iron-chromium-aluminum sponge metal is dried at 80°C for 2 hours, and then the sponge metal sheet is roasted at a high temperature of 450°C for 5 hours.

[0083] (3) Loading aluminum sol: load aluminum sol on the iron-chromium-aluminum (0CR21AL6) sponge metal sheet after high temperature oxidation, and dry at 80°C for 0.8h to prepare the iron-chromium-aluminum sponge metal aluminum sol coating;

[0084] (4) Loading composite lanthanum-modified alumina (La-Al2O3) slurry: loading composite lanthanum-modified alumina (La-Al2O3) slurry on the aluminum sol coating, dried at 80°C for 2 hours, and then The tempe...