Unleaded aviation gasoline

Abstract

The present invention relates to an aviation gasoline formed by blending (i) an unleaded base fuel having a base MON of at least 94, with (ii) at least one aromatic amine effective to provide the base fuel with a final MON of at least 100.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This Application claims the benefit of U.S. Provisional Application 61 / 212,397 filed Apr. 10, 2009.[0002]This Application claims the benefit of U.S. Provisional Application filed Apr. 10, 2009.FIELD OF THE INVENTION[0003]The present invention relates to an unleaded aviation gasoline.BACKGROUND OF THE INVENTION[0004]High octane requirements for aviation gasoline for use in piston driven aircraft which operate under severe requirements, e.g., aircraft containing turbo-charged piston engines, require that commercial aviation fuels contain a high performance octane booster. Organic octane boosters for automobile gasolines (“Mogas”), such as benzene, toluene, xylene, methyl tertiary butyl ether, ethanol, and the like, are not capable by themselves of boosting the MON to the ≧100 MON levels required for aviation gasolines (“Avgas”). To boost the MON to a level≧100 MON, tetraethyl lead (TEL) has been employed in aviation gasolines.[0005]Compositi...

AI Technical Summary

Benefits of technology

[0012]The present invention is an unleaded aviation gasoline formed by blending an unleaded fuel having a Motor Octane Number (MON) of at least 94 and an effective amount of at least one aromatic amine effective to increase the MON of the base fuel to at least 100. The aromatic amine has the following formula [I]:

Problems solved by technology

Organic octane boosters for automobile gasolines (“Mogas”), such as benzene, toluene, xylene, methyl tertiary butyl ether, ethanol, and the like, are not capable by themselves of boosting the MON to the ≧100 MON levels required for aviation gasolines (“Avgas”).

As noted previously, this is insufficient to meet the needs of 9830 MON high octane Avgas.

When lead is removed and an unleaded fuel is blended to the same (100 MON) leaded octane performance, high performance engines remain unsatisfied and cannot be operated safely.

Inevitably, lead production will continue to decline and, at some point, governmental requirements will severely curtail or eliminate its use in aviation gasolines.

Replacing lead with amine octane boosters has progressed over the years, however, satisfying high performance engines has been very difficult.

Unleaded fuels produced that meet the minimum octane performance specification listed in D 910 (100 MON) have failed to satisfy high performance engines.

Images