The importance of fluid catalytic cracking of hydrocarbons (FCC) as a leading process in the chemical industry has been acknowledged for a long time. Present data on feedstock processing and its overall economical impact confirm such a role [1, 21. Technical, economic, and environmental concerns have played significant roles as driving forces in the research conducted on FCC matters, leading to developments that are identifiable along catalytic cracking chronology (e.g., fluid bed technology, zeolite catalyst introduction, promotor addition, octane boosting).