Methods of identifying a hydrocarbon fuel
AssigneeAfton Chemical Corporation
InventorsScott D. Schwab, Dana Anderson
Life of this patent
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Abstract
The present disclosure provides methods for identifying a hydrocarbon fuel, such as the presence and/or amounts of marker compounds having a fluorescence intensity and, through correlation, the presence and/or amounts of additive package(s) within the hydrocarbon fuel. The methods include obtaining a sample of a hydrocarbon fuel including a marker compound having fluorescence, combining the hydrocarbon fuel with water, and subjecting a water phase thereof to light for observing fluorescence.
Claims21
A method for identifying a hydrocarbon fuel, the method comprising:
- obtaining a sample of a hydrocarbon fuel containing a measurable amount of a marker compound, the marker compound having a fluorescence intensity and at least partially soluble in distilled or deionized water;
- combining the hydrocarbon fuel with distilled or deionized water to form a fuel-and-water mixture and mixing the fuel-and-water mixture;
- after the mixing, allowing the fuel-and-water mixture to separate into a water phase and a fuel phase to at least partially extract the marker compound into the water phase;
- subjecting the water phase to light having a wavelength of 250 nm to 800 nm and observing the fluorescence emitted from the marker compound in the water phase;
- and
- wherein the marker compound having a fluorescence intensity has a structure of Formula II:
A method for identifying a hydrocarbon fuel, the method comprising:
- obtaining a sample of a hydrocarbon fuel containing a measurable amount of a fluorescent marker, the fluorescent marker having a fluorescence intensity and at least partially soluble in water;
- combining the hydrocarbon fuel with water to form a fuel-and-water mixture and mixing the fuel-and-water mixture;
- after the mixing, allowing the fuel-and-water mixture to separate into a water phase and a fuel phase to at least partially extract the fluorescent marker into the water phase;
- subjecting the water phase to light having a wavelength of 250 nm to 800 nm and observing the fluorescence emitted from the fluorescent marker in the water phase;
- and
- wherein the fluorescent marker having a fluorescence intensity includes a compound having a structure of Formula III:
- wherein each R4 is independently a C1 to C10 alkyl group.
Dependencies are inferred from the claim text.