Patent ID: 8007729

Claim:
An apparatus, comprising: a reactor for contacting a hydrocarbon feed with catalyst to produce cracked products and coked catalyst; a feed line in communication with said reactor for carrying hydrocarbon feed to said reactor; a catalyst pipe in communication with said reactor for carrying regenerated catalyst to said reactor; a regenerator for combusting coke from the coked catalyst to produce regenerated catalyst and flue gas; a coked catalyst pipe in communication with said reactor and said regenerator for carrying coked catalyst to said regenerator; a flue gas line for carrying flue gas from said regenerator; a flue gas cooler comprising a heat exchanger with heat exchange passages having a side in communication with the flue gas line; and a feed preheat exchanger having a first side in communication with said flue gas line and a second side in communication with said feed line for heat exchanging the flue gas with the hydrocarbon feed.