| 摘要 |
An unleaded aviation gasoline composition which comprises a blend of hydrocarbons and at least one cyclopentadienyl manganese tricarbonyl compound dissolved therein in an amount such that the composition has a minimum knock value lean rating octane number of 100 as determined by ASTM Test Method D2700 and wherein Motor Method octane ratings are converted to aviation ratings in the man- ner described in ASTM Specification D910-90, the composition being further characterized by having: a) a distillation temperature by ASTM Test Method D86 of 10% evaporated, 167.degree.F maximum temperatur e; 40% evaporated, 167.degree.F maximum temperature; 90% evaporated, 275.degree .F maximum temperature; and a final boiling point of 338.degree.F maximum temperature; the sum of the 10 and 50% evaporated temperatures being 307.degree.F minimum; the distillation recovery being 97% minimum; the distillation residue being 1.5% maximum; and the distillation loss being 1.5% maximum; b) a heat of combustion by ASTM Test Method D1405 and as calculated from Table 1 thereof of 18,720 btu per pound minimum, or a heat of combustion by ASTM Test Method D2382 of 18,700 btu per pound minimum, the latter method controlling in case of a discrepancy therebetween; c) a vapor pressure by ASTM Test Method D323 or D2551 of5.5 psi minimum and 7.0 psi maximum; d) a copper strip corrosion by ASTM Test Method D130 of number 1, maximum; e) a potential gum (5-hour aging gum) by ASTM Test Method D873 of 6 mg per 100 mL maximum, or a potential gum (16-hour aging gum by ASTM Test Method D873) of 10 mg per 100 mL; f) a sulfur content by ASTM Test Method D1266 or D2622 of 0.05% by weight maximum; g) a freezing point by ASTM Test Method D2386 of -72.degree.F maximum; and h) a Water reaction by ASTM Test Method D1094 wherein the volume change, if any, does not exceed ~ 2 mL.
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