Marker dyes from cashew nut shell extract and chloronitroanilines

Abstract

The marker dyes in the homologous series of chloronitroanilines were synthesized by the coupling reactions between alkylsalicylate compounds and the esterified cashew nut shell liquid with four types of chloronitroanilines. Each of the marker dyes was added into diesel oil at low concentrations thus they did not alter physical and chemical properties of the marked diesel oil. The method for detecting was achieved by treating the appropriate solvent extraction systems comprising cosolvent systems and base. These marker dyes could be transferred from the marked diesel oil into the solvent extraction phases and could exhibit their obviously visual color. The quantitative determinations were required to measure the marker dyes’ concentrations in diesel oil in ease of dilution, adulteration and storage stability. Furthermore, these marker dyes were tagged to distinguish the different taxed and smuggled petroleum fuels