Monolithic catalyst support and catalyst deposited on the support

Patent 4742038 Issued on May 3, 1988. Estimated Expiration Date:

November 24, 2006. 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

3920583

Catalyst for the diminution of automobile exhaust gases Patent #: 3944504
Issued on: 03/16/1976
Inventor: Ford , et al.

Inventor

Matsumoto, Shinichi

Assignee

Toyota Jidosha Kabushiki Kaisha

Application

No. 06/933996 filed on 11/24/1986

US Classes:

502/303, Lanthanum423/213.5, Group VIII element502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/304, Cerium502/306, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/317, And Group I containing (i.e., alkali, Ag, Au or Cu)502/439MISCELLANEOUS (E.G., CARRIER OR SUPPORT PER SE OR PROCESS OF MAKING, ETC.)

Examiners

Primary: Shine, W. J.

Attorney, Agent or Firm

Finnegan, Henderson, Farabow, Garrett & Dunner

International Classes

B01J 37/00 (20060101)
B01J 32/00 (20060101)
B01D 53/94 (20060101)
B01J 23/76 (20060101)
B01J 23/86 (20060101)
B01J 37/02 (20060101)

Foreign Application Priority Data

1985-11-26 JP

Abstract

A monolithic catalyst support for use in the purification of exhaust gases comprises: a metal substrate; an oxide membrane formed on the surface of the substrate by applying heat treatment to the substrate; and an active alumina layer formed on the oxide membrane, wherein the composition of the metal substrate is composed of from 5 to 30% by weight of chromium (Cr), from 1 to 10% by weight of aluminum (Al), from 0.1 to 0.5 by weight of one or more of potassium (K), rubidium (Rb), cesium (Cs), francium (Fr), calcium (Ca), strontium (Sr), barium (Ba), radium (Ra) and lanthanoid elements and the balance of iron (Fe). The endurance of the monolithic catalyst can be improved because incorporation of the lanthanoid elements can improve the purifying performance.