Biphenyl benzyl ether marker compounds for liquid hydrocarbons and other fuels and oils
View Patent ↗A compound having formula (I) wherein G represents at least one substituent selected from the group consisting of C 1 -C 12 alkyl and C 1 -C 12 alkoxy.
1. A compound selected from the group consisting of 4,4′-bis(4-methylphenoxymethyl)-1,1′-biphenyl, 4,4′-bis(2-methylphenoxymethyl)-1,1′-biphenyl and 4,4′-bis(4-t-butylphenoxymethyl)-1,1′-biphenyl.
2. A method for marking a petroleum hydrocarbon, biodiesel fuel or ethanol fuel; said method comprising adding to said petroleum hydrocarbon, biodiesel fuel or ethanol fuel at least one compound having formula (I)
wherein G represents at least one substituent selected from the group consisting of C 1 -C 12 alkyl and C 1 -C 12 alkoxy and wherein each compound of formula (I) is present at a level from 0.05 ppm to 20 ppm.
3. The method of claim 2 in which each compound of formula (I) is present at a level from 0.05 ppm to 10 ppm.
4. The method of claim 3 in which G represents at least one substituent selected from the group consisting of C 1 -C 6 alkyl or C 1 -C 6 alkoxy.
5. The method of claim 4 in which G represents two or three substituents selected from the group consisting of C 1 -C 4 alkyl.
6. The method of claim 5 in which G represents two or three methyl groups or two or three ethyl groups.
7. The method of claim 3 in which said at least one compound having formula (I) is 4,4′-bis(4-methylphenoxymethyl)-1,1′-biphenyl, 4,4′-bis(2-methylphenoxymethyl)-1,1′-biphenyl or 4,4′-bis(4-t-butylphenoxymethyl)-1,1′-biphenyl.