Catalytic cracking of metal-contaminated oils

摘要

Metal-contaminated oils, including mildly hydrotreated residual oils, are catalytically cracked in the absence of added hydrogen in a fluid catalytic cracking process wherein the regenerated catalyst has less than about 0.05 wt. % residual carbon. By conducting regeneration of the catalyst to that level at 1300 DEG to 1400 DEG F. (preferably at about 1350 DEG F.) with excess air, additional benefits are realized in that metal deposited on the catalyst by cracking of residual stocks is thereby passivated.