Gasoline product

Abstract

Aromatic blendstocks suitable for use in making an unleaded gasoline fuel for combustion in a spark ignition engine contain substantial amounts of diisopropylbenzene which provides relatively more energy for doing work while producing fewer carbon dioxide emissions as compared to current gasoline blendstocks. Unleaded gasolines made utilizing the foregoing aromatic blendstocks contain at least about 0.3 weight percent diisopropylbenzene, preferably about 0.3 to about 10 weight percent diisopropylbenzene.

That which is claimed is:  
     
         1 . An unleaded gasoline fuel suitable for combustion in a spark ignition internal combustion engine and containing at least about 0.3 weight percent diisopropylbenzene.  
     
     
         2 . The unleaded gasoline fuel in accordance with  claim 1  containing about 0.3 to about 10 weight percent diisopropylbenzene.  
     
     
         3 . The unleaded gasoline fuel in accordance with  claim 1 , containing no more than about 1 weight percent benzene.  
     
     
         4 . The unleaded gasoline fuel in accordance with  claim 1 , containing no more than about 0.5 weight percent benzene.  
     
     
         5 . The unleaded gasoline fuel in accordance with  claim 1  and substantially free from olefins.  
     
     
         6 . The unleaded gasoline fuel in accordance with  claim 1  and having a Reid Vapor Pressure no greater than about 1 atmosphere.  
     
     
         7 . The unleaded gasoline fuel in accordance with  claim 1  and having a Reid Vapor Pressure of about 0.5 atmospheres to about 0.9 atmospheres.  
     
     
         8 . The unleaded gasoline fuel in accordance with  claim 1  and having a Reid Vapor Pressure no greater than about 1 atmosphere and a 90% D-86 Distillation Point no greater than about 375□ F.  
     
     
         9 . An aromatic blendstock, suitable for making an unleaded gasoline fuel for combustion in a spark ignition internal combustion engine and comprising isopropylbenzene and diisopropylbenzene in a isopropylbenzene-to-diisopropylbenzene mole ratio in the range of about 0 to about 20.  
     
     
         10 . The aromatic blendstock in accordance with  claim 9  wherein the isopropylbenzene-to-diisopropylbenzene mole ratio is in the range of about 1 to about 6.