Aggregates of ceric oxide crystallites and reduction of vehicular emissions therewith
US6093223A · kind A · utility
15Cited by
13References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Vehicular emissions are reduced/purified via combustion of the hydrocarbon fuel therefor, e.g., diesel fuel, in the presence of a cerium compound, preferably a cerium (IV) compound, to produce soots having depressed ignition temperatures that contain effective purifying amounts of aggregates of ceric oxide crystallites, the largest particle size dimension of which ranging from 50 .ANG. (5 nanometers) to 10,000 .ANG. (1,000 nanometers) and the crystallite sizes of which, measured by Debye-Scherrer technique, ranging from 50 .ANG. (5 nanometers) to 250 .ANG. (25 nanometers).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.