Journal
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
Volume 91, Issue 11, Pages 1835-1840Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1070427218110149
Keywords
asphaltenes; functionalization; elemental analysis; IR spectroscopy
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Funding
- Ministry of Education and Science of Russia [14.613.21.0069, RFMEFI 61317X0069/1]
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Sulfuric and nitric acids were used to functionalize asphaltenes isolated from heavy crude oil by treatment with heptane or hexamethyldisiloxane. The elemental composition of the asphaltenes was analyzed and their functional groups before and after the modification were identified. It was shown that the content of heteroatoms in the modified asphaltenes increases. Carbonyl, carboxyl, sulfonic, and nitro groups appear in the asphaltenes with the content dependent on the type of a modifier used and on the prehistory of how they were obtained.
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