초록 ▼

An improved method of presulfiding a hydrotreating catalyst which minimizes sulfur stripping upon start-up of a hydrotreating reactor utilizing such a catalyst. The method comprises the steps of contacting a hydrotreating catalyst with elemental sulfur at a temperature below the melting point of sul

An improved method of presulfiding a hydrotreating catalyst which minimizes sulfur stripping upon start-up of a hydrotreating reactor utilizing such a catalyst. The method comprises the steps of contacting a hydrotreating catalyst with elemental sulfur at a temperature below the melting point of sulfur, thereby forming a sulfur-catalyst mixture, and heating the sulfur-catalyst mixture to a temperature above the melting point of sulfur. Preferably, the sulfur-catalyst mixture is first mixed with a high boiling oil or a hydrocarbon solvent to form a prewet mixture prior to heating at a temperature above the melting point of sulfur.

대표청구항 ▼

A method of presulfiding a hydrotreating metal oxide catalyst comprising the steps of: (a) contacting said catalyst with powdered elemental sulfur at a temperature below the melting point of sulfur such that said elemental sulfur sublimes and is substantially incorporated in the pores of said cataly

A method of presulfiding a hydrotreating metal oxide catalyst comprising the steps of: (a) contacting said catalyst with powdered elemental sulfur at a temperature below the melting point of sulfur such that said elemental sulfur sublimes and is substantially incorporated in the pores of said catalyst, thereby forming a mixture, and (b) heating said mixture in the presence of hydrogen to a temperature above the melting point of sulfur and below 390°F. for a timer period long enough for substantially all of the sulfur incorporated into the catalyst pores to have reacted to produce metal sulfides and hydrogen sulfides and to achieve a final sulfur level sufficient to sulfide active and promot metal in said catalyst. A mixture comprising a metal oxide catalyst and a suspension, wherein said suspension comprises: an amount of elemental sulfur sufficient to sulfide active and promoter metals in said catalyst upon exposure to hydrogen; and an amount of a hydrocarbon solvent or high boiling oil which can be substantially incorporated into said catalyst.