MULTI-ZONE CATALYTIC CRACKING OF CRUDE OILS

A method of processing a hydrocarbon feed may comprise fractionating the hydrocarbon feed into a light stream, a middle stream and a heavy stream; hydrotreating the heavy stream to form a hydrotreated heavy stream; feeding the light stream to a first Fluid Catalytic Cracking (FCC) reaction zone; feeding the middle stream to a second FCC reaction zone; and feeding the hydrotreated heavy stream to a third FCC reaction zone, thereby producing a heavy product stream comprising light olefins; and feeding one or more of the product streams to one or more fractionators, thereby producing one or more finished product streams and one or more recycle streams comprising one or more of light cycle oil (LCO), heavy cycle oil (HCO), and slurry oil; and hydrotreating one or more of the recycle streams to form the hydrotreated heavy stream.