Claims
- 1. A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight, based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
- 2. A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; at least one of the elements iridium, palladium and rhodium; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
Priority Claims (1)
Number |
Date |
Country |
Kind |
86 03221 |
Mar 1986 |
FRX |
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Parent Case Info
This application is a continuation of application Ser. No. 023,242, filed Mar. 9, 1987, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4294726 |
Bozon et al. |
Oct 1981 |
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4316822 |
Fujitani et al. |
Feb 1982 |
|
4504598 |
Ono et al. |
Mar 1985 |
|
4581343 |
Blanchard et al. |
Apr 1986 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
23242 |
Mar 1987 |
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