Selectively suppressed hydrogenation catalyst

Details Selectively suppressed hydrogenation catalyst Selectively suppressed hydrogenation catalyst

2005-09-22

2009-11-03

Johnson, Edward M (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S333000

Reexamination Certificate

active

07612012

ABSTRACT:
The hydrogenation activity of a heteroatom removal catalyst, having activity for both heteroatom removal and hydrogenation, is selectively suppressed by a treatment which comprises contacting the catalyst with (i) hydrogen, (ii) a selectively deactivating agent that suppresses the catalyst's hydrogenation activity, and (iii) a protective agent, such as CO, that preserves and protects the heteroatom removal activity during the treatment. This may be achieved in a reactor while it is on-line and removing heteroatoms from a hydrocarbon feed.

REFERENCES:
patent: 5217935 (1993-06-01), Van Driesen
patent: 5306681 (1994-04-01), Schorfheide et al.

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