Catalyst for the purification of an exhaust gas

Patent 4127510 Issued on November 28, 1978. Estimated Expiration Date:

October 26, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3711397

3773894

3897367

3905918

3907968

Catalyst for purifying automotive exhaust gases
Patent #: 3972837
Issued on: 08/03/1976
Inventor: Acres , et al.

Catalyst preparation Patent #: 4001143
Issued on: 01/04/1977
Inventor: McCann, III

Inventors

Assignee

Johnson, Matthey & Co., Limited

Application

No. 05/735884 filed on 10/26/1976

US Classes:

502/303, Lanthanum423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/213.5, Group VIII element502/327, And Group III metal containing (i.e., Sc, Y, Al, Ga, In or Tl)502/328And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)

Examiners

Primary: Shine, W. J.

Attorney, Agent or Firm

Cushman, Darby & Cushman

International Classes

B01J 23/56 (20060101)
B01J 23/40 (20060101)
B01D 53/94 (20060101)
B01J 23/54 (20060101)
B01J 23/89 (20060101)

Foreign Application Priority Data

1975-10-31 GB

Abstract

This invention relates to catalysts suitable for the purification of exhaust gases. In particular a catalyst according to the invention comprises a compound selected from the group represented by the general formula Ax My Oz in which A is one or more metals selected from the group consisting of Li, Na, K, Mg, Ca, Sr, Ba, Al, Sc, Y, the lanthanides, Ti, Zr, V, Cr, Mn, Fe, Co, Ni, Cu, Zn; M is a metal selected from the group consisting of Ir, Rh, Pt, Pd, and Ru; y has an integral or fractional value within the range from 0.1 to 3.0, z is an integer with a value from 2 to 7 and x has a value such that the compound is electrically neutral.