Method of producing oxidation catalyst for cleaning exhaust gas

Details Method of producing oxidation catalyst for cleaning exhaust gas Method of producing oxidation catalyst for cleaning exhaust gas

2009-04-02

2011-10-11

Silverman, Stanley (Department: 1736)

Catalyst, solid sorbent, or support therefor: product or process

Miscellaneous

C502S302000, C502S304000, C502S350000, C502S353000

Reexamination Certificate

active

08034742

ABSTRACT:
The present invention provides a method of producing an oxidation catalyst for cleaning exhaust gas, capable of achieving an excellent catalytic activity at a lower temperature for particulates and high boiling point hydrocarbons in exhaust gas from internal-combustion engines. A primary firing is performed after mixing nitrate of a first metal element Ln, manganese nitrate, and oxide of a third metal element A. A resultant material from the primary firing is subjected to grinding and then a secondary firing is performed at the range of 600 to 1200° C. for 1 to 5 hours. By doing so, a catalyst comprising a composite metal oxide represented by the general formula LnyMn1-xAxO3is obtained.

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