Wax flow viscosity for fuels
AssigneeExxonMobil Research and Engineering Company
InventorsTimothy J. Anderson, Erin R. Fruchey, Suzanne R. Golisz, Kenneth C. H. Kar, Sheryl B. Rubin-Pitel
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Abstract
Marine fuel compositions that are low sulfur and have improved wax flow viscosity are disclosed. An example marine fuel composition may have the following enumerated properties: a sulfur content of about 0.50% or less by weight of the marine fuel composition; a density at 15° C. of about 0.86 g/cm3 to about 1.01 g/cm3; a kinematic viscosity at 50° C. of about 1 centistoke to about 700 centistokes; and a ratio of kinematic viscosity to wax flow viscosity of greater than 1, wherein the wax flow viscosity is determined using a minimum operating viscosity of about 8 centistokes at 50° C.
Claims12
A marine fuel composition having low sulfur content, the marine fuel composition having the following enumerated properties:
- a sulfur content of about 0.50% or less by weight of the marine fuel composition;
- a density at 15° C. of about 0.86 g/cm3 to about 1.01 g/cm3;
- a kinematic viscosity at 50° C. of about 10 centistokes to about 80 centistokes;
- a wax endpoint temperature of about 35° C. to about 130° C., and
- wherein the marine fuel composition comprises a heavy gas oil and a lighter gas oil, wherein at least 50 vol. % of the heavy gas oil boils at about 500° C. to about 750° C., and wherein at least 50 vol. % of the lighter gas oil boils at about 200° C. to about 550° C.
A method of blending marine fuel compositions, comprising:
- blending two or more hydrocarbon components to prepare a liquid fuel, wherein the liquid fuel has the following enumerated properties:
- a sulfur content of about 0.50% or less by weight of the marine fuel composition;
- a density at 15° C. of about 0.86 g/cm3 to about 1.01 g/cm3;
- a kinematic viscosity at 50° C. of about 10 centistokes to about 80 centistokes;
- a wax endpoint temperature of about 35° C. to about 130° C., and
- wherein the two or more hydrocarbon components comprise a heavy gas oil and a lighter gas oil, wherein at least 50 wt. % of the heavy gas oil boils at about 500° C. to about 750° C., and wherein at least 50 wt. % of the lighter gas oil boils at about 200° C. to about 550° C.
Dependencies are inferred from the claim text.