The paper presents the results of the electron beam irradiation of resin-asphalt components of oil from the Usinskoye and asphaltenes from the Nurlatskoye oilfields. The results obtained show that no cleavages of chemical bonds occur in the resin-asphalt components of oil under exposure of oil to an electron beam of low intensity (90 keV). In this case, dissociation of complex structural units (CSU) in an atmosphere of propane-butane and air or an association of aromatic hydrocarbons, resins, and asphaltenes in CSU in a hydrogen atmosphere occurs. The exposure of the asphaltenes of the oil from the Nurlatskoye oilfield to an electron beam results in an insignificant destruction of CSU in reducing and neutral atmospheres.
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