Method of transferring a passivating agent to or from a cracking

Details Method of transferring a passivating agent to or from a cracking Method of transferring a passivating agent to or from a cracking

1979-11-01

1981-03-24

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252411R, 252455Z, 252456, 208113, 208120, B01J 2314, B01J 2318

Patent

active

042579198

ABSTRACT:
A passivating agent is added to a cracking catalyst which has not been previously treated with the passivating agent by mixing the untreated cracking catalyst with a refractory material which has been previously treated with a passivating agent. At least a portion of the passivating agent is transferred by inter-particle transfer from the treated refractory material to the untreated cracking catalyst.
A passivating agent may also be recovered from a previously treated cracking catalyst which has become contaminated by contacting the contaminated cracking catalyst with a refractory material which has not previously been treated with the passivating agent. At least a portion of the passivating agent will transfer by inter-particle transfer from the contaminated catalyst to the refractory material while the contaminants on the contaminated cracking catalyst will not transfer.

REFERENCES:
patent: 2488718 (1949-11-01), Forrester
patent: 3120484 (1964-02-01), Mills et al.
patent: 3151088 (1964-09-01), Sanford et al.
patent: 3506409 (1970-04-01), Hutson, Jr. et al.
patent: 3524822 (1970-08-01), Frankovich et al.
patent: 4111845 (1978-09-01), McKay
patent: 4148714 (1979-08-01), Nielsen et al.
patent: 4153536 (1979-05-01), McKay

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