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1. WO2013003573 - BIPHENOL ETHER COMPOUNDS AS MARKERS FOR LIQUID HYDROCARBONS AND OTHER FUELS AND OILS

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[ EN ]

CLAIMS

1. A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel; said method comprising adding to said petroleum hydrocarbon or liquid biologically derived fuel at least rmula (I),


(I)

wherein R represents Ci-Ci8 alkyl, C3-C18 alkenyl or C3-C18 alkynyl.

2. The method of claim 1 in which each compound of formula (I) is present at a level from 0.01 ppm to 20 ppm.

3. The method of claim 2 in which -OR groups are in 2,2 '-positions on benzene rings in formula (I).

4. The method of claim 3 in which R represents C2-C18 alkyl or C3-C18 alkenyl.

5. The method of claim 4 in which each compound of formula (I) is present at a level from 0.01 ppm to 10 ppm.

6. The method of claim 5 in which R represents C3-C16 alkyl or C3-C16 alkenyl.

7. The method of claim 6 further comprising detecting the compounds of formula (I) by mass spectral analysis.

8. The method of claim 7 in which R represents C4-C16 alkyl.

9. The method of claim 8 in which said petroleum hydrocarbon or liquid biologically derived fuel is a petroleum hydrocarbon, biodiesel fuel or ethanol fuel.