CATALYST FOR PURIFYING EXHAUST GAS - TOYOTA CENTRAL RES & DEV

Title:

CATALYST FOR PURIFYING EXHAUST GAS

Document Type and Number:

Japanese Patent JPS63305938

Kind Code:

A

Abstract:

PURPOSE: To enhance the purification capacity of CO, hydrocarbon and NOx by carrying composite oxide having a specified perovskite type structure on a carrier consisting of compds. having the perovskite type structure and forming a catalyst for purifying exhaust gas.

CONSTITUTION: The following aq. soln. is added to the powder of a marketing carrier wherein nitrate of metal constituting composite oxide La1-xSrxMO3 (0<x<0.5, M is V, Cr, Mn, Co, Fe, Ni and Cu) having a perovskite type structure being a catalytic component is mixed at a prescribed stoichiometric ratio. Then the mixture is dried at about 100°C for 5W12hr in the atmosphere and thereafter calcined at 700W800°C for 5W10hr in the atmosphere. The nitrate is pyrolyzed by this heat treatment and perovskite composite oxide is carried on the carrier. The amount of the catalytic component to be carried is regulated to 1W80wt.% preferably to 5W30wt.%.

Inventors:

OZAWA MASAKUNI
KIMURA MAREO
ISOTANI AKIO

Application Number:

JP14283587A

Publication Date:

December 13, 1988

Filing Date:

June 08, 1987

Export Citation:

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Assignee:

TOYOTA CENTRAL RES & DEV

International Classes:

B01J23/02; B01J23/10; B01J23/22; B01J23/26; B01J23/34; B01J23/78; B01J32/00; B01D53/94; (IPC1-7): B01D53/36; B01J23/02; B01J23/10; B01J23/22; B01J23/26; B01J23/34; B01J23/78; B01J32/00

Domestic Patent References:

JPS6118434A	1986-01-27
JPS61274748A	1986-12-04

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