Aromatic-Aliphatic Azo Derivatives Particularly As Markers For Petroleum Products, Method For Synthesizing Them, Use Thereof And Derived Compositions
OwnerEnrico Traversoinventor
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Abstract
Products having the general formula A, particularly useful as non-coloring markers in a process for tagging mineral oils, petroleum derivatives in general and solvents. A method is also described for synthesizing the products by resorting to a classical diazocoupling reaction between a derivative of an aromatic amine and a coupling agent, preferably a functionalized ester. The invention also relates to the use of these tagging and dyeing molecules and mixtures which comprise them. In particular, the mixtures comprise the markers according to the invention and the markers and/or dyes classically used in the petroleum sector.
Claims27
1-26. (canceled)
A product, particularly as a marker for mineral oils, having the general formula A:
- where:
- R1, R2 and R3 are each independently selected from the group that consists of H, CH3, C2H5, OCH3, OC2H5, Cl, Br, F, CCl3, CF3, CN and NO2, with the condition that at least one is selected among Cl, Br, F, CCl3, CF3, CN and NO2, and preferably is NO2;
- R4 is a linear or branched hydrocarbon chain, which comprises at least 8 carbon atoms and optionally comprises at least one element selected among oxygen, C5-C6 aliphatic cyclic hydrocarbon, and C6 aryl;
- X is selected from the group that consists of CN, formyl, acetyl, propionyl and butyryl;
- Y is selected from the group that consists of oxygen, sulfur, NH, NR4 and NR5, where R4 is defined as above and R5 is a C1-C7 linear or branched aliphatic hydrocarbon chain.
Dependencies are inferred from the claim text.