Silent markers for petroleum, method of tagging, and method...

C - Chemistry – Metallurgy – 09 – B

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C09B 29/12 (2006.01) C10L 1/00 (2006.01) C10L 1/12 (2006.01) C10L 1/22 (2006.01) C10L 1/226 (2006.01) C10L 1/30 (2006.01)

Patent

CA 2063533

Liquid petroleum products are marked with markers having the formula: Image wherein the R1s and the R2s are the same or different and are each selected from -H and C1-C7 alkyls; provided that at least one, and preferably both, R1s are a C3-C7 alkyl; and wherein the R3s are the same or different and are selected from -H, -NO2, -Cl, -Br, -F, -CN, and -Me; and provided that at least one R3 is selected from -NO2, -Cl, -Br, -F, and -CN.

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