Catalyst with lanthanide-doped zirconia and methods of making
US9011784B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jan 28, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/3229
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention generally relates to three-way catalysts and catalyst formulations capable of simultaneously converting nitrogen oxides, carbon monoxide, and hydrocarbons into less toxic compounds. Such three-way catalyst formulations contain ZrO2-based mixed-metal oxide support oxides doped with an amount of lanthanide. Three-way catalyst formulations with the support oxides of the present invention demonstrate higher catalytic activity, efficiency and longevity than comparable catalysts formulated with traditional support oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.