Disclosed is a method and apparatus for fluid catalytic cracking (FCC) of a hydrocarbon feed in an open or closed system, which includes a multistage stripper system. The multistage stripper system comprises a means for spinning a gasiform mixture of catalyst and cracked hydrocarbons exiting from a riser,...http://www.google.fr/patents/US4572780?utm_source=gb-gplus-shareBrevet US4572780 - Multistage stripper for FCC unit with catalyst separation by spinning
Multistage stripper for FCC unit with catalyst separation by spinning
