METHOD OF DETERMINATION OF OCTANE NUMBER OF MOTOR PETROL AND ITS COMPONENTS BY RESEARCH Russian patent published in 2009 - IPC G01N33/22 

FIELD: oil and gas production.

SUBSTANCE: invention refers to methods of research and analysis of motor fuels and their components applied in oil processing industry, The method of determination of octane number of motor petrol and its components by research in range of 100-110 points consists in testing of researched product at an installation containing an internal combustion carburettor engine with variable compression ratio and a device for measurement of detonation intensity; further, the method consists in comparing research fuel detonation intensity with two reference fuels with a known octane number at degree of compression facilitating an average level of detonation with other things being equal; also mixtures of toluene with isooctane are used as reference fuels with known octane number; notably, share of toluene in reference mixture is determined from the chart prepared beforehand.

EFFECT: safety of analysis due to exclusion of toxic tetraethyl lead from reference fuels.

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