Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1983-07-28
1985-03-26
Konopka, P. E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
208140, 502 49, 502 52, 502517, B01J 2396, B01J 2120, C10G 3508
Patent
active
045073970
ABSTRACT:
The process of oxidatively regenerating in situ a fixed bed hydrocarbon catalyst which is sensitive to reactive sulfur compounds in a conversion system having sulfur-contaminated vessels and/or conduits in the flow path upstream from said catalyst is improved by passing regenerating oxygen-containing gas first through the sulfur-contaminated vessels and/or conduits and then through the fixed catalyst bed while limiting the water content of the regenerating gas to a concentration of not more than 0.1 mol percent throughout the flow path and at a temperature in the range of 750.degree.-1100.degree. F. to oxidize the sulfur contaminants in the vessels and/or conduits upstream from the catalyst. Thereby the evolved sulfur oxides flow through the fixed bed catalyst in the absence of sufficient water which would promote reaction of sulfur oxides with the catalyst. The low water content regenerating gas is continued until substantially all the oxidizable sulfur contaminants are removed from the vessels and/or conduits. Thereafter, carbonaceous deposits are oxidized from the catalyst.
REFERENCES:
patent: 2504102 (1950-04-01), Sorf
patent: 2892770 (1959-06-01), Coley et al.
patent: 3046235 (1962-07-01), King et al.
patent: 3617523 (1971-11-01), Spurlock
Chevron Research Company
Konopka P. E.
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