Patent ID: 6107533
Filing Date: 2000-08-22
Classification: C10G,Y10S

Abstract:
A process to reduce equipment fouling in the fractionation of mixtures of a cracked hydrocarbon stream by sequential fractional distillation, comprising the steps of:(a) feeding to a first unit a feedstock containing at least a C.sub.2 to C.sub.5.sup.+ fraction of the cracked hydrocarbon stream;(b) removing from said first unit a stream enriched in at least a C.sub.4 to C.sub.5.sup.+ fraction;(c) reacting the stream enriched in said at least the C.sub.4 to C.sub.5.sup.+ fraction with hydrogen under conditions effective to selectively hydrogenate di-olefinically, poly-olefinically and acetylinically unsaturated hydrocarbon components to olefins, oligomers and heavy components. to produce a hydrogenated stream;(d) returning at least a portion of the hydrogenated stream produced in step (c) to said first unit.