WERKWIJZE VOOR DE KATALYTISCHE H2-BEHANDELING VAN ZWARE KOOLWATERSTOFFEN IN EEN TWEE-BED-SYSTEEM.

摘要

Heavy hydrocarbon feedstocks are hydroprocessed using a synergistic two-stage catalyst combination. The first stage catalyst comprises at least one Group VIb or Group VIII metal, metal oxide, or metal sulfide on a refractory porous support and has an average pore diameter of 60-150 ANGSTROM . The second stage catalyst comprises at least one Group VIb or VIII metal, metal oxide, or metal sulfide on a refractory porous catalyst support and has an average pore diameter of 30- 70 ANGSTROM and smaller than that of the first stage catalyst. Preferably the first stage catalyst has at least 40% pore volume present as pores having diameters greater than 80 ANGSTROM and the second stage catalyst has at least 50% pore volume present as pores having diameters smaller than 80 ANGSTROM .