High activity, high yield tin modified platinum-iridium...

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B01J 23/40 (2006.01) B01J 23/42 (2006.01) B01J 23/46 (2006.01) B01J 23/62 (2006.01) C10G 35/09 (2006.01)

Patent

CA 2056196

- 21 - ABSTRACT OF THE DISCLOSURE Tin modified platinum-iridium catalysts provide high yields of C5+ 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.

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