Patent ID: 6153089
Filing Date: 2000-11-28
Classification: C10G,Y02P

Abstract:
A process for upgrading olefinic hydrocarbon streams through simultaneous cracking and reforming comprising the steps ofinjecting hydrocarbon feed into a bottom of a short riser in a reactor,passing the hydrocarbon feed through the short riser in presence of hot catalyst mixture,terminating the hydrocarbon feed to a bubbling bed connected to the short riser in presence of hot catalyst mixture,separating product at the top of the reactor,withdrawing spent catalyst from the reactor after steam purging,regenerating the spent catalyst by burning coke deposited in the spent catalyst during reaction in presence of air, andrecirculating the regenerated catalyst back to the reactor,wherein the reaction results in liquid product having not less than 15 wt % each of toluene and xylene, less than 0.5 wt % of olefin and less than 5 wt % of benzene, and a gaseous product rich in hydrogen, ethylene, propylene and butylene yield, andwherein the catalyst mixture consists of dehydrogenating metal component, medium pore shape selective zeolite component, and large pore acidic crystalline or amorphous component, the catalyst being in micro-spherical form having particle size within 20-150 microns and having a total dehydrogenating metal content in the range of 0.05-2.0 wt %.