Process of hydrotreating and/or hydrocracking hydrocarbon streams or tail gas treating sulfur-containing gas streams
AssigneeShell Oil Company
InventorsJames D. Seamans, Charles T. Adams, Wendy B. Dominguez, Andrew A.-J. Chen
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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.
Claims44
In a process of hydrotreating and/or hydrocracking hydrocarbon streams or tail gas treating sulfur-containing gas streams which comprises contacting the streams in the presence of hydrogen with a hydrotreating and/or hydrocracking or tail gas treating catalyst containing sulfides of metals of Group VIB and/or Group VIII of the periodic Table at temperatures ranging from about 100.degree. C. to about 425.degree. C., the improvement which comprises using a catalyst prepared by (a) contacting a presulfidable 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 (b) heating said sulfur-incorporated catalyst in the presence of a liquid olefinic hydrocarbon at a temperature greater than about 150.degree. C.
In a process for starting up a hydrotreating and/or hydrocracking or tail gas treating reactor which comprises loading a metal oxide(s)-containing hydrotreating and/or hydrocracking or tail gas treating catalyst into the reactor and heating the reactor up to hydrotreating and/or hydrocracking or tail gas treating temperature ranging from about 100.degree. C. to about 425.degree. C. in the presence of hydrogen, the improvement which comprises using a catalyst prepared by (a) contacting a presulfidable 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 (b) heating said sulfur-incorporated catalyst in the presence of a liquid olefinic hydrocarbon at a temperature greater than about 150.degree. C.
In a process for hydrotreating a hydrocarbon feedstock by contacting said feedstock with a hydrotreating catalyst and hydrogen at a temperature ranging from about 200.degree. C. to about 425.degree. C., the improvement which comprises using a catalyst prepared by the process of (a) contacting a presulfidable 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 (b) heating said sulfur-incorporated catalyst in the presence of a liquid olefinic hydrocarbon at a temperature ranging from about 150.degree. C. to about 425.degree. C. for a time period long enough for the sulfur to react with metal oxides to produce metal sulfides.
Dependencies are inferred from the claim text.