Patent ID: 6248297
Filing Date: 2001-06-19
Classification: C10G

Abstract:
An apparatus for the fluidized catalytic cracking of hydrocarbons, the apparatus comprising:a substantially vertical riser;means for introducing catalyst into a lower portion of said riser comprising a catalyst nozzle;means for introducing a lift gas into said riser;means for introducing a hydrocarbon feed into said riser at a location above said means for introducing lift gas into said riser;a transfer conduit in communication with the upper end of said riser;a diluent conduit for introducing a diluent into said transfer conduit from outside the reactor vessel;a reactor vessel at least partially containing means for separating catalyst from gases, said means for separating defining an inlet in direct communication with said transfer conduit, a catalyst outlet, and a vapor outlet;a stripping vessel located below said reactor vessel in communication with said catalyst outlet defining a collection volume for receiving catalyst separated by said means for separating catalyst and having means for contacting the catalyst collected therein with a stripping medium;means for heating catalyst in said stripper vessel;a vapor line in direct communication with said vapor outlet for carrying hydrocarbon vapors away from said vapor outlet; and,means for quenching the hydrocarbon vapors from said vapor line said means for quenching having a location above said reactor vessel comprising a quench vessel located on and supported from the top of said reactor vessel and surrounding said vapor line.