In given article is undertaken attempt of the determination factious and group composition biofuels (the refined rapseed oil RRO), subject to distillation under atmospheric pressure on GOST 2177-99. In [8. 9, 10] is described methods of the experiment and equipment provision, allowing define the chemical composition RMR and his(its) faction, selected in process of fraction division (0-10%, 10-50% and 50-85%, the remainder). In tabl. 1 are brought physical characteristic RRO, which was used as fuel when undertaking real experiment on tractor diesel SMD-17N [5]. Rapsovoe butter refined high-eruc (technical) is gained on Nezhinskom oilextraction plant (according to GOST 8988-77).
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