High activity, high yield tin modified platinum-iridium catalyst

Details High activity, high yield tin modified platinum-iridium catalyst High activity, high yield tin modified platinum-iridium catalyst

1991-12-30

1993-06-22

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Reforming

208138, 502223, C10G 35085, C10G 3506, C10G 4552

Patent

active

052214656

ABSTRACT:
Tin modified platinum-iridium catalysts provide high yields of C.sub.5 +liquid reformate in catalytic reforming, concurrent with high activity. In particular, the tin modified platinum-iridium catalysts are of unusually high selectivity, as contrasted with known iridium promoted platinum catalysts. The high selectivity is manifested in reforming a naphtha feed in a reactor charged to capacity with the catalyst, but particularly when used in the dehydrocyclization zone, or tail reactor of a series of reactors, while the lead reactors of the series contain a non tin-containing platinum catalyst, especially a platinum-iridium, or a platinum-rhenium catalyst. The tin modified platinum-iridium catalysts are also highly active, with only moderate loss in the high activity for which iridium stabilized platinum catalysts are known.

REFERENCES:
patent: 3718578 (1973-02-01), Buss et al.
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patent: 4677094 (1987-06-01), Moser et al.
patent: 4714538 (1987-12-01), Moser et al.
patent: 4714539 (1987-12-01), Moser et al.
patent: 4714540 (1987-12-01), Moser et al.
patent: 4737262 (1988-04-01), Franck et al.
patent: 4737483 (1988-04-01), Moser et al.

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