Process for regenerating a deactivated catalyst
AssigneeIdemitsu Kosan Co., Ltd.
InventorsTakashi Murakawa, Michio Sugimoto
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Abstract
There is disclosed a process for regenerating a deactivated catalyst containing a zeolite and a noble metal of group VIII of the Periodic Table supported thereon which comprises subjecting the deactivated catalyst to decoking treatment under reductive or oxidative condition and subsequently to contact treatment with a solution containing a halogen or a halogen-containing compound and thereafter calcining the deactivated catalyst. According to the above process, the catalytic activity of a deactivated catalyst is restored to the level comparable to that of a fresh catalyst by the use of an inexpensive regenerating agent and simplified steps. Thus, the regeneration process is expected to find effective use in petroleum refinery, petrochemical industry, etc.
Claims18
A process for regenerating a deactivated catalyst, said catalyst containing a zeolite and a noble metal or group VIII of the Periodic Table supported thereon, said process comprising:
- (a) subjecting said deactivated catalyst to a decoking treatment under a reductive or an oxidation condition and subsequently to a contact treatment with an impregnation solution containing a mixture of NH.sub.4 Cl and NH.sub.4 F or a mixture of HCl and NH.sub.4 F in an amount an amount of 0.1 to 10% by weight based on the amount of catalyst nd thereafter
- (b) calcining said deactivated catalyst at a temperature of 100.degree. to 600.degree. C. for a period of time of 0.5 to 24 hours and at a pressure of 0 to 20 kg/cm.sup.2 G.
Dependencies are inferred from the claim text.