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- W2635215281 abstract "Transformations of high-molecular-weight compounds of oil sand natural bitumen under the heat treatment were studied in this work. For that purpose the natural bitumen isolated from oil sand taken from the Beke field (Kazakhstan) was used as a substrate. Thermal processing of natural bitumen leads to a general change in the chemical composition of components and to an increase in the output of certain fractions. The contents of oil, tar and asphaltenes were determined and the elemental composition of tar-asphaltene compounds was evaluated. Molecular structures of the tar and asphaltene components of natural bitumen before and after cracking have been defined from the data of elemental analysis, NMR spectroscopy and molecular weight. The high molecular compounds were presented as giant molecules containing small aromatic islands some of which were linked by aliphatic chains, that was proved by infrared spectroscopy." @default.
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- W2635215281 date "2017-01-01" @default.
- W2635215281 modified "2023-10-16" @default.
- W2635215281 title "High temperature transformation of tar-asphaltene components of oil sand bitumen" @default.
- W2635215281 doi "https://doi.org/10.2298/jsc161126069i" @default.
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