C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
252/87
C10G 35/085 (2006.01) B01J 23/90 (2006.01) B01J 23/96 (2006.01)
Patent
CA 1312067
ABSTRACT OF THE DISCLOSURE Improvements in a reforming process for the regeneration and reactivation of a bed of a reform- ing catalyst, notably an iridium-containing catalyst, coked and catalytically deactivated during the on-oil portion of a reforming cycle. The reactor containing the catalyst is contained in a multi-reactor unit, the individual reactors of which are conected in series via suitable piping and valving. The reactor can be alter- nately manifolded with production facilities during the on-oil portion of the operating cycle during which period the catalyst of said reactor becomes coked, and can be manifolded alone or with other reactors with a ferrous metal regeneration circuit during the catalyst regenera- tion and reactivation portion Or an operating cycle during which period the catalyst is regenerated and reactivated. In the regeneration and reactivation of the coked catalyst the sequence of process steps include (a) an oxidation step and subsequent reduction step, or (b) a reduction step and subsequent oxidation step, to remove coke and redisperse the iridium component of the catalyst of said reactor. Iron scale oarryover from the regeneration circuit to the catalyst of said reactor is drastically reduced by-passing said reactor during the periods of transition from the (a) oxidation step to the reduction step, or (b) from the reduction step to the oxidation step by closing off the manifold connection between the regenera- tion circuit and the said reactor. Loss Or catalyst activity due to iron scale carryover to the catalyst of said reactor is thus suppressed.
568617
Borden Ladner Gervais Llp
Boyle Joseph P.
Exxon Research And Engineering Company
Imperial Oil Limited
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