Patent ID: 7863212

Claim:
A process for producing light olefins, comprising: catalytically cracking a hydrocarbon feed in the presence of a crystalline aluminosilicate zeolite catalyst having a SiO 2 /Al 2 O 3 molar ratio ranging from 50 to 300 carrying a rare earth element in an amount ranging from 0.4 to 20 relative to the aluminum of the zeolite on an atomic ratio basis in a fluidized bed-type reactor which permits continuous regeneration of the catalyst under reaction conditions involving a reaction temperature ranging from 500 to 700Â° C., a reaction pressure ranging from 50 to 500 kPa, a steam to hydrocarbon mass ratio ranging from 0.1 to 1, a catalyst to hydrocarbon mass ratio ranging from 18 to 40, and a contact time ranging from 0.1 to 10 seconds.