Gasoline desulfurization process

Details Gasoline desulfurization process Gasoline desulfurization process

1995-08-28

1997-01-28

Myers, Helane

Mineral oils: processes and products

Refining

Sulfur removal

208209, 208211, 208347, C10G 5302

Patent

active

055974767

ABSTRACT:
A catalytic cracked naphtha is desulfurized with minimum loss of olefins and octane. The naphtha is fed to a first distillation column reactor which acts as a depentanizer or dehexanizer with the lighter material containing most of the olefins and mercaptans being boiled up into a first distillation reaction zone where the mercaptans are reacted with diolefins to form sulfides which are removed in the bottoms along with any higher boiling sulfur compounds. The bottoms are subjected to hydrodesulfurization in a second distillation column reactor where the sulfur compounds are converted to H.sub.2 S and removed. The lighter fraction containing most of the olefins is thus not subjected to the more harsh hydrogenation conditions of the second reactor.

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