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US 5,470,358 AGranted
Unleaded aviation gasoline
AssigneeExxon Research & Engineering Co.
InventorRoger G. Gaughan
Life of this patent
Estimating the term…
Abstract
Aromatic amines of the formula ##STR1## where R.sub.1 is C.sub.1 -C.sub.10 alkyl or halogen and n is an integer from 0 to 3 are effective in increasing the motor octane number of aviation gasolines to 98 or greater without the presence of lead additives.
Claims11
An unleaded aviation fuel composition having a motor octane number of at least about 98 for piston driven aircraft which comprises:
- (1) unleaded aviation gasoline base fuel having a motor octane number of 90-93, and
- (2) an amount of at least one aromatic amine effective to boost the motor octane number of the base fuel to at least about 98, said aromatic amine having the formula ##STR4## wherein R.sub.1 is C.sub.1 -C.sub.10 alkyl and n is an integer from 0 to 3 with the proviso that R.sub.1 cannot occupy the 2- and 6- positions on the aromatic ring.
An unleaded aviation fuel composition having a motor octane number of at least about 98 for piston driven aircraft which comprises:
- (1) unleaded aviation gasoline base fuel having a motor octane number of 90-93, and
- (2) an amount of at least one aromatic amine effective to boost the motor octane number of the base fuel to at least about 98, said aromatic amine being a halogen substituted phenylamine or a mixed halogen and C.sub.1 -C.sub.10 alkyl substituted phenylamine with the proviso that the alkyl group cannot occupy the 2- or 6-positions on the phenyl ring.
Dependencies are inferred from the claim text.