Method of treating spontaneously combustible catalysts

Details Method of treating spontaneously combustible catalysts Method of treating spontaneously combustible catalysts

1997-09-16

2000-07-25

Dunn, Tom

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

20811135, C10G 4718

Patent

active

060933097

ABSTRACT:
Self-heating characteristics of a spontaneously combustible catalyst are reduced by treating spontaneously combustible catalysts with oxygen-containing hydrocarbons having at least 12 carbon atoms. The treatment is particularly suitable for reducing the self-heating characteristics of sulfidable metal oxide(s)-containing catalysts, presulfurized catalysts, presulfided catalysts or reduced catalysts. When applied to sulfur-containing catalysts, the treatment gives a catalyst that has suppressed self-heating properties without substantially compromising sulfur retention or activity. Further hydrocracking catalysts treated by the oxygen-containing hydrocarbons give improved product yield. Further, a method of safely unloading a catalyst from a reactor is provided where the catalyst in the reactor is treated with a liquid mixture containing oxygen-containing hydrocarbon having at least 12 carbon atoms to wet the catalyst.

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