Patent ID: 8177964
Filing Date: 2012-05-15
Classification: C10B,C10G

Abstract:
1. A process of delayed coking wherein petroleum ( 1 ) is fed to an atmospheric distillation tower ( 2 ) whence derivatives are removed in addition to a bottom residuum ( 5 ) of the atmospheric distillation tower ( 2 ), which is fed to a vacuum distillation tower ( 6 ) whence heavy vacuum gas oil ( 7 ) and/or a vacuum residuum ( 8 ) and/or one or more other derivatives are removed, wherein a fraction ( 7 ′) of heavy vacuum gas oil ( 7 ) from the vacuum distillation tower ( 6 ) is added to the vacuum residuum ( 8 ) of the vacuum distillation tower ( 6 ) and this combined stream is a feedstock of a delayed coking unit ( 9 ), wherein the percentage by volume of the fraction (