Asphalt compositions
AssigneeMobil Oil Corporation
InventorsDonald R. Cushman, Charles A. Pagen, John W. Schick, Tsoung-Yuan Yan
Life of this patent
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Abstract
Improved asphalt compositions are provided which are produced by forming a homogeneous blend of marginal asphalt stock with coal-derived asphaltenes, and air-blowing the homogeneous blend to yield an asphalt composition having a viscosity-penetration index higher than about 2.5 .times. 10.sup.5.
Claims7
A process for upgrading asphalt which consists essentially of admixing and forming a homogeneous blend of coal-derived asphaltenes with a marginal asphalt which has a potential air-blown viscosity-penetration index lower than about 2.5 .times. 10.sup.5, and air blowing the homogeneous blend to yield an asphalt composition having a viscosity-penetration index higher than about 2.5 .times. 10.sup.5.
Dependencies are inferred from the claim text.