Patent ID: 8110092

Claim:
A process for recovering heat from a fluid catalytic cracking unit comprising: contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbons to gaseous product hydrocarbons having lower molecular weight and deposit coke on the catalyst to provide coked catalyst; separating said coked catalyst from said gaseous product hydrocarbons; indirectly heat exchanging said gaseous product hydrocarbons with a heat exchange media to provide superheated heat exchange media and provide a hot product hydrocarbon stream; directing said superheated heat exchange media to an expander; recovering power from said superheated heat exchange media in said expander; separating said hot product hydrocarbon stream to obtain a plurality of product streams; and feeding at least a portion of one of said product streams along with said gaseous product hydrocarbons to be indirectly heat exchanged with said heat exchange media.