Motor fuel formulation

Abstract

Described are preferred compositions for a motor fuel. Such motor fuels may be particularly well suited for use in the motor of an aircraft. In particular, compositions of the present disclosure may comprise alicyclic alkanes, straight or branched chain alkanes, and aromatics. In a preferred embodiment, the fuel comprises cyclopentane, isooctane, and one or more aromatics selected from xylene, toluene, and trimethylbenzenes. The present disclosure describes a full spectrum of unleaded fuels with various motor octane (MON) values to address a wide range of aviation fuel needs in the global marketplace.

What is claimed is: 
     
         1 . A motor fuel comprising at least one alicyclic alkane, at least one straight or branched chain alkane, and at least one aromatic. 
     
     
         2 . The motor fuel of  claim 1  comprising 1-60 wt % of said at least one alicyclic alkane more than 0% to about 60 wt % of said at least one straight or branched chain alkane, and more than 0% to about 50 wt % of said at least one aromatic. 
     
     
         3 . The motor fuel of  claim 2  wherein the motor fuel meets the requirements of ASTM D910 or ASTM D7547 specifications for aviation gasoline. 
     
     
         4 . The motor fuel of  claim 2  wherein each of said at least one alicyclic alkane is selected from the group consisting of cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane and cyclodecane, each of said at least one straight or branched chain alkanes is selected from the group consisting of propane, butane, pentane, hexane, heptane and octane, and each of said at least one aromatic is selected from the group consisting of toluene, xylene and trimethylbenzene. 
     
     
         5 . The motor fuel of  claim 4  in which said at least one alicyclic alkane is cyclopentane. 
     
     
         6 . The motor fuel of  claim 4  in which said at least one straight or branched chain alkane is isooctane. 
     
     
         7 . The motor fuel of  claim 4  in which said at least one aromatic is xylene. 
     
     
         8 . The motor fuel of  claim 7  in which said at least one aromatic is m-xylene. 
     
     
         9 . A motor fuel comprising 1-60 wt % of cyclopentane, more than 0% to about 60 wt % of isooctane, and more than 0% to about 50 wt % of an aromatic selected from the group consisting of, toluene, xylene, trimethylbenzene, and mixtures thereof. 
     
     
         10 . The motor fuel of  claim 9  in which the alicyclic alkane comprises cyclopentane and neo-hexane. 
     
     
         11 . The motor fuel of  claim 9  consisting essentially of cyclopentane, isooctane and aromatic. 
     
     
         12 . The motor fuel of  claim 11  in which said aromatic comprises m-xylene. 
     
     
         13 . The motor fuel of  claim 12  in which said aromatic further comprises 1,3,5-trimethylbenzene. 
     
     
         14 . The motor fuel of  claim 9 , wherein said motor fuel comprises less than about 0.5 percent by weight of added lead compounds or octane enhancing fuel additives. 
     
     
         15 . The motor fuel of  claim 9  wherein the motor fuel has a motor octane number greater than 80. 
     
     
         16 . The motor fuel of  claim 9  wherein the motor fuel has a motor octane number greater than 91. 
     
     
         17 . The motor fuel of  claim 9  wherein the motor fuel has a motor octane number greater than 100.