| 摘要 |
PROBLEM TO BE SOLVED: To provide an unleaded gasoline excellent in startability and operability and cleaning properties of intake valves of automobiles in consideration of the air environment. SOLUTION: The unleaded gasoline contains 1-15 vol% of ethanol (EtOH) and has (1) a research octane number of at least 89 and less than 97, (2) a motor octane number of at least 79 and less than 87, (3) a Reid vapor pressure of 45-93 kPa, (4) a 50% distillation temperature of 75-110°C, (5) a 130°C distillation amount of 68-92 vol%, (6) an aromatics content of at most 40 vol%, (7) an olefin content of at most 30 vol%, (8) a benzene content of at most 1 vol%, (9) a sulfur content of at most 10 mass ppm, and (10) a polycyclic aromatics index Y of at most 4. COPYRIGHT: (C)2007,JPO&INPIT
|
