Integrated pyrolysis gasoline treatment process

Details Integrated pyrolysis gasoline treatment process Integrated pyrolysis gasoline treatment process

1999-01-22

2000-07-18

Griffin, Walter D.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 58, 208 59, 208 96, 208 97, 208210, 208211, 208212, 208213, 208217, C10G 4500

Patent

active

060902701

ABSTRACT:
An integrated process for treating pyrolysis gasolines by depentanizing the pyrolysis gasoline in a first distillation column reactor which also subjects the C.sub.5 fraction to selective hydrogenation of acetylenes and diolefins. The bottoms or C.sub.6 + material is then subjected to further distillation in a second distillation column reactor to remove either a C.sub.6 and lighter or C.sub.8 and lighter overheads which contains a benzene/toluene/xylene (BTX) concentrate while at the same time removing mercaptans and selectively hydrogenating the diolefins. The BTX concentrate is then subjected to hydrodesulfurization prior to aromatics extraction and separation of the benzene from the toluene and xylene. Concurrently with the benzene separation any remaining olef ins are saturated to remove the color bodies. Finally the heavy gasoline fraction is subjected to the concurrent catalytic removal of mercaptans and separation to remove the heaviest material.

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