Reactivation of iridium-containing catalysts

Details Reactivation of iridium-containing catalysts Reactivation of iridium-containing catalysts

B - Operations, Transporting

01

J

252/87

B01J 23/96 (2006.01) B01J 38/44 (2006.01) C10G 35/085 (2006.01) C10G 35/09 (2006.01)

Patent

CA 1252453

ABSTRACT OF THE DISCLOSURE At least partially deactivated iridium- containing catalysts are reactivated in a sequence of chloriding and burning steps. The sequence includes (1) a low temperature, i.e., not exceeding 425°C, burn of a chlorided catalyst in the presence of HC1 and O2 without any agglomeration of iridium; (2) a high temperature, i.e., greater than 425°C, burn of catalyst chlorided to a higher chloride content than in (1) and carried out again in the presence of HC1 and O2 thereby avoiding agglomeration of iridium or redispersing any inadvertent agglomerated iridium.

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