Converting Motor Fuels Range Distillates to Light Olefins in a Multiple Riser Fluid Catalytic Cracking (FCC) Unit

Abstract

Processes and systems for fluid catalytic cracking (FCC) of hydrocarbon feeds using a multiple riser FCC reactor are described. The conditions in each riser can be tailored for handling a different feed. For example, one riser may be configured to crack heavy hydrocarbons, such as vacuum gas oil (VGO) to yield medium and light products. Other risers may be configured to crack low and/or medium hydrocarbons to yield light olefins. Embodiments of the disclosed processes and systems may be used to provide a product spectrum that has greater amounts of light olefins.

Dependencies are inferred from the claim text.