초록 ▼

This invention relates to a method for sulfiding hydrocarbon conversion catalysts, e.g., hydrotreating catalysts comprising at least one metal sulfide and passivating said sulfided catalyst. The catalysts which may be treated by the method of the present invention comprise an alumina or an silica-al

This invention relates to a method for sulfiding hydrocarbon conversion catalysts, e.g., hydrotreating catalysts comprising at least one metal sulfide and passivating said sulfided catalyst. The catalysts which may be treated by the method of the present invention comprise an alumina or an silica-alumina support e.g., a zeolite, and at least one Group VI metal sulfide and/or at least one Group VIII metal sulfide. In particular, the present invention provides a process for continuously activating a fresh or regenerated catalyst comprising at least one Group VI or Group VIII metal oxide supported on a particulate refractory oxide support material by converting substantially all of said Group VI or Group VIII metal oxide to the corresponding metal sulfide and passivating the resulting activated catalyst.

대표청구항 ▼

[ What is claimed is:] [1.] A process for continuously activating a fresh or regenerated catalyst comprising at least one Group VI or Group VIII metal oxide supported on a particulate refractory oxide support material by converting substantially all of said Group VI or Group VIII metal oxide to the

[ What is claimed is:] [1.] A process for continuously activating a fresh or regenerated catalyst comprising at least one Group VI or Group VIII metal oxide supported on a particulate refractory oxide support material by converting substantially all of said Group VI or Group VIII metal oxide to the corresponding metal sulfide and passivating the resulting activated catalyst, which comprises the steps of:(A) sulfiding said fresh or regenerated catalyst by;(1)establishing at least one ebullating or expanded bed by passing a gaseous stream comprising hydrogen sulfide and hydrogen upwardly through a plurality of particles of said fresh or regenerated catalyst confined in an activation zone,(2)establishing at least one downflow zone and at least one upflow zone wherein each downflow zone is in fluid communication with a downstream upflow zone within each bed and maintaining the height of the particles in each upflow zone at the same height as the height of the particles in the adjacent upstream downflow zone to provide a looped pathway in said ebullating or expanded bed,(3)passing said regenerated or fresh catalyst into said ebullating or expanded bed and moving said fresh or regenerated catalyst along said looped pathway, and(4)removing a catalyst comprising substantially all of the Group VI and/or Group VIII metals as sulfides; and(B) passivating said sulfided or active catalyst by(1)establishing at least one ebullating or expanded bed by passing a gaseous stream comprising oxygen upwardly through a plurality of particles of said catalyst confined in a passivation zone,(2)establishing at least one downflow zone and at least one upflow zone wherein each downflow zone is in fluid communication with a downstream upflow zone within each bed and maintaining the height of the particles in each upflow zone at the same height as the height of the particles in the adjacent upstream downflow zone to provide a looped pathway in said ebullating or expanded bed,(3)passing said activated catalyst into said ebullating or expanded bed and moving said activated catalyst along said looped pathway, and(4)removing a passivated catalyst that is resistant to self heating by reacting exothermally with atmospheric oxygen.