Abstract
It is proved experimentally that structural factor is a measure of homogeneity or inhomogeneity of structural-group and fractional compositions of hydrocarbon oils, and the dynamics of its variation characterizes the initiation of secondary oxidative degradation processes. It is shown by IR-spectral analysis that carboxylic acid anhydrides are formed under conditions of high-temperature catalytic oxidation due to secondary processes. The nature of the secondary processes that occur in laboratory conditions and during use is identical.
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