HIGH OCTANE UNLEADED AVIATION GASOLINE
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United States of America Patent
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Issued Date -
Mar 7, 2024
app pub date -
Feb 23, 2022
filing date -
Feb 24, 2021
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Abstract
An unleaded aviation fuel composition with improved octane properties has 20-35 vol. % toluene having a MON of at least 107; 2-10 vol. % aniline; from above 30 to 55 vol % of at least one alkylate or alkylate blend comprising isoparaffins 4-9 carbon atoms, 3-20 vol % C5 isoparaffins, 3-15 vol % C7 isoparaffins, and 60-90 vol % C8 isoparaffins, and less than 1 vol % C10+, based on the alkylate or alkylate blend; at least 8 vol % isopentane, 0.1-10 vol %, straight chain alkyl acetate; and 0.1-10 vol % branched chain alcohol having 4-8 carbon atoms, provided that the branched chain does not contain any t-butyl groups. The volume ratio of straight chain alkyl acetate to branched chain alcohol is in the range of 3:1 to 1:3 and the fuel composition contains less than 1 vol % of C8 aromatics.
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