Gasoline upgrading process

Details Gasoline upgrading process Gasoline upgrading process

1992-08-13

1994-07-05

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 58, 208 88, 208212, C10G 4500

Patent

active

053264622

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 system comprising a zeolite having the topology of ZSM-5 and a zeolite sorbing 10 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per gram dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. The treatment over the acidic catalyst system in the second step 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.

REFERENCES:
patent: 4016245 (1977-04-01), Plank et al.
patent: 4076842 (1978-02-01), Plank et al.
patent: 4556477 (1985-12-01), Dwyer
patent: 4753720 (1988-06-01), Morrison
patent: 4827076 (1989-05-01), Kakayeff et al.

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