Gasoline upgrading process

Details Gasoline upgrading process Gasoline upgrading process

1992-05-08

1994-09-20

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208212, 208213, C10G 6902

Patent

active

053486412

ABSTRACT:
Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization followed by treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5. The treatment over the acidic catalyst in the second step, which is carried out in a hydrogen atmosphere which is essentially free of hydrogen sulfide and ammonia, restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha. The hydrogen supplied to the second step may be make-up hydrogen with recycle hydrogen routed to the hydrodesulfurization step after removal of ammonia and hydrogen sulfide in a scrubber.

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