Method of presulfurizing a hydrotreating, hydrocracking or tail gas treating catalyst
AssigneeCRI International, Inc.
InventorsJames Dallas Seamans, Charles Terrell Adams, Wendy Beth Dominguez, Andrew An-Ju Chen
Life of this patent
Estimating the term…
Abstract
The invention relates to an improved method of presulfurizing a sulfidable metal oxide(s)-containing catalyst which minimizes sulfur stripping upon start-up of a reactor and improves catalyst activity. The method consists of contacting a sulfidable metal oxide(s)-containing catalyst with elemental sulfur at a temperature such that said elemental sulfur is substantially incorporated in the pores of said catalyst by sublimation and/or melting and heating the sulfur-incorporated catalyst in the presence of a liquid olefinic hydrocarbon at a temperature greater than about 150.degree. C.
Claims20
A method of presulfurizing a sulfidable metal oxide(s)-containing catalyst which comprises:
- (a) contacting said catalyst with a mixture of powdered elemental sulfur and a liquid olefinic hydrocarbon to produce a treated-catalyst;
- and
- (b) heating the treated-catalyst at an effective temperature to react the olefinic hydrocarbon and to provide a sulfurized catalyst that is more resistant to sulfur leaching than one not contacted with an olefin.
A method of presulfurizing a sulfidable metal oxide(s)-containing catalyst which comprises:
- (a) impregnating said catalyst with elemental sulfur:
- (b) subsequently or in a mixture with said elemental sulfur contacting a liquid olefinic hydrocarbon to produce sulfur-containing catalyst;
- and
- (c) heating the sulfur-containing catalyst at an effective temperature to react the olefinic hydrocarbon and to provide a sulfurized catalyst that is more resistant to sulfur leaching than one not contacted with an olefin.
Dependencies are inferred from the claim text.