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- W56928516 abstract "Separation of bitumen into narrow fractions by various chromatographic methods was the procedure for isolating n-paraffins from saturated hydrocarbons. The bitumen samples analyzed (road grades) were subjected to preliminary deasphaltization with hexane. Sharp separation of n-paraffins in bitumen from West Siberian oil, with the initial and final peaks retaining their symmetry was shown. This chromatograph differed from the others by well-defined maxima in the C/sub 22/ - C/sub 27/ region. Bitumen from a mixture of East Ukrainian and Mangyshlak oils was found to contain 27 n-paraffins with 14 to 40 carbon atoms in the molecule, with a maximum in the C/sub 27/ - C/sub 32/ region. The carbon-chain length of n-paraffins in bitumen from a mixture of Romashkino tar and vacuum distillate was from C/sub 14/ to C/sub 38/ and in bitumen from Shaim oil, from C/sub 14/ to C/sub 16/. The ranges of n-paraffins in accordance with the number of carbon atoms in the molecule from C/sub min/ to C/sub max/ in the bitumen samples studied were given, and also their quantitative distribution by groups. Mass-spectroscopic analysis showed that the mixtures of complex-forming hydrocarbons isolated from bitumen from East Ukrainian and Romashkino oils contained traces of higher n-paraffins, upmore » to C/sub 43/, detection of which by gas chromatography requires higher final programming temperatures. 1 figiure, 2 tables.« less" @default.
- W56928516 created "2016-06-24" @default.
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- W56928516 date "1983-04-01" @default.
- W56928516 modified "2023-09-24" @default.
- W56928516 title "Investigation of the composition of n-paraffin hydrocarbons in petroleum by the GLC method" @default.
- W56928516 hasPublicationYear "1983" @default.
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