Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1989-03-06
1991-08-13
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502303, 502332, 502333, 502334, 4232135, B01J 2104, B01J 2106, B01J 2310, B01J 2356
Patent
active
050396471
ABSTRACT:
There is provided an improved catalyst for purifying exhaust gases comprising a carrier carrying alumina, zirconium oxide and a noble metal catalyst. The improvement resides in the fact that the carrier carries the alumina as a layer having dispersed therein the zirconium oxide particles, the zirconium oxide particles carrying said noble metal catalyst. The dispersibility of the noble metal catalytic component is thereby improved and the sintering prevention effect on the noble metal catalytic component by the zirconium oxide is effectively exhibited. Thus, the heat-proof property of the catalyst is improved and the cooperation between the noble metal catalytic component and alumina is effectively enhanced, improving longevity of the catalyst.
REFERENCES:
patent: 4233189 (1980-11-01), Gandhi et al.
patent: 4367162 (1983-01-01), Fujitani et al.
patent: 4587231 (1986-05-01), Sawamura et al.
Ihara Kazunori
Murakami Hiroshi
Mazda Motor Corporation
Shine W. J.
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