Method for catalytic thermal cracking petroleum hydrocarbon

Catalytic pyrolysis method for preparing ethylene and propylene, based preheated petroleum hydrocarbon transfer line to the reactor, and the high-molecular sieve-containing pillared clay and / or rare earth-containing five-membered ring in the presence of high temperature steam acidic molecular sieve catalyst is silicalite, at a reaction temperature of 680 ~ 780 ℃, reaction pressure 1.5 ~ 4.0 × 10