Patent ID: 6824676
Filing Date: 2004-11-30
Classification: C10G

Abstract:
A process for removal of sulfur from a full boiling range fluid cracked naphtha stream comprising the steps of:(a) feeding hydrogen and a full boiling range naphtha feed containing olefins, diolefins, mercaptans, thiophene and other organic sulfur compounds to a first distillation column reactor containing a bed of thioetherification catalyst; (b) concurrently in said first distillation column reactor: (i) reacting a portion of the mercaptans contained within said full boiling range naphtha stream with a portion of the diolefins contained within said full boiling range naphtha stream to produce sulfides and (ii) separating said full boiling range naphtha stream into three fractions by fractional distillation; (c) removing a first product from said first distillation column reactor comprising a light naphtha containing substantially no mercaptans, sulfides or other organic sulfur compounds as a first overheads; (d) removing an intermediate naphtha as a side draw from said first distillation column reactor containing thiophene, diolefins boiling in the range of thiophene and mercaptans boiling in the range of thiophene; (e) removing a heavy naphtha from said first distillation column reactor containing said sulfides and other organic sulfur compounds as a first bottoms; (f) feeding said intermediate naphtha and a low sulfur, low olefin gas oil to a single pass fixed bed reactor containing a hydrodesulfurization catalyst where substantially all of any remaining sulfides and other organic sulfur compounds are reacted with hydrogen to form hydrogen sulfide.