Catalyst for treatment of exhaust gases from internal combustion engines
This patent describes a process for the treatment of exhaust gases. It comprises: contacting the gases with a catalytic composite comprising a support which is a refractory inorganic oxide selected from the group consisting of alumina, silica, titania, zirconia, aluminosilicates and mixtures thereof, having dispersed thereon lanthanum oxide. The lanthanum oxide is dispersed on the support by the method of commingling a solution of a lanthanum salt with a hydrosol of the metal precursor of the support, forming particles from the lanthanum containing hydrosol, calcining the particles to forma particulate support containing lanthanum oxide, having an average crystallite size of less than 25 Angstroms, at least one other rare earth oxide and at least one noble metal component selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium.
- Assignee:
- Allied-Signal Inc., Morris County, NJ (USA)
- Patent Number(s):
- A; US 4919902
- Application Number:
- PPN: US s 7-269389
- OSTI ID:
- 6828812
- Country of Publication:
- United States
- Language:
- English
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