Indmax Fluid Catalytic Cracking (I-FCCSM) is a novel process to produce propylene, ethylene and butylenes in refineries directly from heavy residues. The Indmax FCC technology is a unique solution (a mother unit) for vertical integration of refinery and petrochemical complexes. The I-FCC process combines the proprietary Indmax catalyst and process concepts developed by Indian Oil Corporation Limited, R&D Centre (IOCL R&D), India, with the state-of-the-art FCC technology, design features and know-how of Lummus Technology, the exclusive licensor of I-FCC technology worldwide.