Low emission, non-oxygenated fuel composition

Fuel and related compositions – Liquid fuels

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585 14, C10L 106

Patent

active

061324795

ABSTRACT:
Provided is an unleaded gasoline fuel which is substantially free of oxygenates, i.e., the fuel contains less than 1.0 weight percent oxygen based on the total weight of the fuel composition, and most preferably contains no oxygen containing compounds. The gasoline fuel of the present invention also has a Reid vapor pressure of less than 7.5 psi, a sulfur content of less than 30 ppmw, and more preferably less than 20 ppmw sulfur, and an aromatic hydrocarbon content greater than 30 volume percent and/or a 50% D-86 Distillation Point greater than 220.degree. F. and/or a 90% D-86 Distillation Point greater than 330.degree. F. The gasoline fuel preferably also has an olefin content of no greater than 8 volume percent, and more preferably 5 volume percent or less. It has been found that such a gasoline fuel offers a substantially oxygenate free gasoline which avoids the environmental impact of oxygenates, yet when combusted in an internal combustion automobile provides good performance and good emissions.

REFERENCES:
patent: 5288393 (1994-02-01), Jessup et al.
patent: 5346609 (1994-09-01), Fletcher et al.
patent: 5401280 (1995-03-01), Kaneko et al.
patent: 5593567 (1997-01-01), Jessup et al.
patent: 5653866 (1997-08-01), Jessup et al.
patent: 5814111 (1998-09-01), Graham et al.
patent: 5837126 (1998-11-01), Jessup et al.

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