| 摘要 |
<p>The present invention is a method, and the product thereof, to increase the octane index of gasoline through the use of a combination of oxygenated hydrocarbons and organometallic compounds. A gasoline mixture is prepared containing between 75 to 95% unleaded gasoline, 5 to 25% oxygenated hydrocarbons such as alcohols of less than 5 carbons, between about 0.05 g to 4 g Pb/gal. and between about 0.005 g to 0.15 g Mn/gal. The actual percentages of alcohol and organometallic compounds which are added may be optimized as necessary to produce the desired increase in octane using empirical methods similar to the procedures used in the following examples. The preferred alcohol composition consists of between 33 to 100% denatured ethyl alcohol and 0 to 67% methyl alcohol and makes up between 7.5 and 10% by volume of the gasoline mixture. Other oxygenated hydrocarbons of fewer than 5 carbons which can be used in place of or in addition to ethanol and methanol include isomers of propanol and butanol, methyl tertiary-butyl ether (MTBE) and tertiary-amyl methyl ether (TAME). Acceptable sources of lead and manganese include organolead compounds such as tetraalkyl lead compounds, especially tetraethyl lead, and derivatives thereof, and organomanganese compounds such as methylcyclopentadienyl manganese tricarbonyl. The preferred quantities of both lead and manganese are in the range of 0.1 mg metal/gallon of gasoline.</p> |
