Patent ID: 6632351
Filing Date: 2003-10-14
Classification: C10G

Abstract:
A process for pyrolyzing a feedstock comprising crude oil and/or crude oil fractions containing pitch in an olefins pyrolysis furnace comprising feeding said feedstock to a first stage preheater provided in a convection zone of said olefins pyrolysis furnace, heating said feedstock within said first stage preheater to a first temperature of at least 375Â° C. to produce a preheated gas-liquid mixture, withdrawing said preheated gas-liquid mixture from said first stage preheater to a vapor-liquid separator, separating and removing a gas fraction from a liquid fraction in said vapor-liquid separator, and feeding said gas fraction to a second stage preheater provided in said convection zone, further heating said gas fraction to a second temperature above said first temperature producing a preheated gas fraction, introducing said preheated gas fraction into a radiant zone of the pyrolysis furnace, and pyrolyzing the gas to a product comprising olefins.