CHEMICAL MARKER AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2013 - IPC C10L1/16 C07C9/22 G01N33/22 C10L10/00 C08F8/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a fraction of polymethyl-substituted C₁₈-C₃₆ alkanes of formula: , where n=4-10 by reacting molten atactic polypropylene with atmospheric oxygen at 150-250°C for 1-6 hours with air flow rate of 0.6-1.9 l/min∙kg using secondary low-molecular oxidation products as raw material. The method is characterised by that first, low-molecular products are fractionated collection of the basic fraction at 200-310°C followed by catalytic hydrofining from impurities of alkenes in gas phase or oxidation of alkenes at 100°C with aqueous solution of KMnO₄ with weight ratio of the fraction to KMnO₄ of 2.5-3.0:1.0, followed by freezing the organic layer at minus 20°C and separating the crystalline water-containing precipitate. The invention also relates to use of said fraction as a chemical marker for hydrocarbon fuels.

EFFECT: disclosed marker has a low cost and high concealment.

2 cl, 5 ex, 1 tbl, 4 dwg