Patent ID: 8083932
Filing Date: 2011-12-27
Classification: C10G

Abstract:
1. A process for pyrolyzing a wide boiling range vaporizable hydrocarbon feedstock or mixtures of hydrocarbon feedstocks having a wide boiling range, comprising a variety of hydrocarbons of differing carbon/hydrogen ratios and/or molecular weights in a pyrolysis furnace having a convection section, least two sets of radiant pyrolysis coils, and a vapor distribution header to produce olefins and other pyrolysis products, comprising: a. heating and partially vaporizing a feedstock, and feeding the partially vaporized feedstock to a vapor/liquid separator device to produce fractions comprising separate vapor and liquid phases; b. feeding the vapor phase fraction to the vapor distribution header and then to a first set of radiant pyrolysis coils of a pyrolysis furnace operated at a first set of cracking conditions where the hydrocarbons are cracked to produce olefins; and c. heating and fully vaporizing the liquid phase fraction from the vapor/liquid separator, and feeding the vapor phase thus created to the vapor distribution header and then to a second set of radiant coils of the pyrolysis furnace operated at a second set of cracking conditions where the hydrocarbons are cracked to produce olefins.