PROCESS FOR THERMAL CRACKING OF HEAVY OIL

摘要

A process is disclosed for the thermal cracking of heavy oil containing nonvaporizable, high-molecular weight hydrocarbons in the presence of steam in one or more thermal cracking tubes or ducts, which process is characterized in that a fluid comprising steam and heavy oil is flowed through a thermal cracking tube such that thermal cracking is carried out under the following conditions: (a) temperature of the fluid in the thermal cracking tube: 800 to 1100.degree.C (b) pressure of the fluid in the thermal cracking tube: 0 to 50 kg/cm2G (c) flow rate or velocity of fluid through the thermal cracking tube: 10 to 100 m/sec, and (d) residence time of the fluid in the thermal at least 0.2 cracking tube: seconds, these conditions providing an improved process with less poisoning of catalyst.