Loading patent…
AssigneeChevron U.S.A. Inc.
InventorStephen J. Miller
Estimating the term…
A method for improving the lubricating properties of a distillate base oil characterized by a pour point of 0 degrees C. or less and a boiling range having the 10 percent point falling between about 625 degrees F. and about 790 degrees F. and the 90 percent point falling between about 725 degrees F. and about 950 degrees F., the method comprises blending with said distillate base oil a sufficient amount of a pour point depressing base oil blending component to reduce the pour point of the resulting base oil blend at least 3 degrees C. below the pour point of the distillate base oil, wherein the pour point depressing base oil blending component is an isomerized Fischer-Tropsch derived bottoms product having a pour point that is at least 3 degrees C. higher than the pour point of the distillate base oil.
A pour point depressing base oil blending component suitable for lowering the pour point of a base oil which comprises an isomerized Fischer-Tropsch derived bottoms product having an average molecular weight between about 600 and about 1100 and an average degree of branching in the molecules between about 6.5 and about 10 alkyl branches per 100 carbon atoms, and when 7.0 weight percent is blended with an isomerized distillate base oil characterized by a pour point between about −12 degrees C. and about −18 degrees C., the pour point of the resulting base oil blend will be at least 3 degrees C. lower than the pour point of said isomerized distillate base oil.
Dependencies are inferred from the claim text.