FLUIDIZED CATALYTIC CRACKING

摘要

A process for fluidized catalytic cracking of heavy oils is disclosed wherein the long transfer line (110) connecting the catalytic cracking reactor to the main fractionator is modified by incorporation of a quench zone (120), of enlarged cross sectional area, where liquid products are recycled from the main fractionator and injected into the transfer line (110), without wetting the walls of the transfer line (110) near the reactor outlet. Quenching hot cracked products from the FCC reactor in the transfer line (110) improves yields, and permits higher catalytic cracking reactor temperatures.