Aviation fuel additive scavenger
AssigneeAfton Chemical Corporation
InventorsZachary John McAfee, Joseph Anthony Calderone, III
Life of this patent
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Abstract
Aviation fuel formulations receive many benefits when a manganese-containing additive is incorporated in that composition. However, to the extent that the use of a manganese-containing compound may result in the formation of engine deposits during combustion, it is beneficial to further provide a scavenger compound to the fuel composition. This scavenger compound may include a phosphorus-containing compound, an organobromide compounds, and/or a tricarbonyl compound.
Claims23
An aviation fuel additive composition comprising a cyclopentadienyl manganese tricarbonyl compound and a manganese scavenger compound, wherein the manganese scavenger compound is selected from triphenyl phosphine oxide, a triphenyl phosphine, and a tricarbonyl compound.
An aviation fuel additive composition comprising:
- (a) an amount of one or more cyclopentadienyl manganese tricarbonyl compounds sufficient to provide about 0.5 to 500 mg Mn/l to an aviation fuel composition,
- (b) a scavenger selected from triphenyl phosphine oxide, triphenyl phosphine, and tricarbonyl compounds,
- and wherein the composition is substantially lead free.
A method of reducing manganese-containing deposits resulting from the combustion of an aviation fuel including a cyclopentadienyl manganese tricarbonyl in an aviation fuel engine, the method comprising the steps of:
- providing a scavenger selected from triphenyl phosphine oxide, triphenyl phosphine, and tricarbonyl compounds;
- mixing the scavenger with a substantially lead-free aviation fuel composition, wherein the aviation fuel composition further comprises a cyclopentadienyl manganese tricarbonyl;
- and
- combusting the fuel composition and scavenger mixture in an aviation, spark ignition engine;
- wherein the combustion results in less manganese-containing engine deposits than the combustion of a fuel composition without a scavenger in a comparable engine.
Dependencies are inferred from the claim text.