Nitration of Petroleum Asphaltenes with Concentrated Nitric Acid under Various Conditions

The relationships of the reaction of the of tar asphaltenes with concentrated nitric acid were studied under various quantitative, temperature, and time conditions. According to IR spectroscopic data, nitration occurs to the highest degree during the action of a 50-fold excess of 64% nitric acid on...

Full description

Saved in:
Bibliographic Details
Published in:Chemistry and technology of fuels and oils 2021-09, Vol.57 (4), p.645-652
Main Authors: Nagornova, O. A., Foss, L. E., Shabalin, K. B., Musin, L. I., Borisov, D. N., Yakubov, M. R.
Format: Article
Language:English
Subjects:
Asphaltenes
Carbonyls
Chemistry
Chemistry and Materials Science
Electron paramagnetic resonance
Free radicals
Geotechnical Engineering & Applied Earth Sciences
Industrial Chemistry/Chemical Engineering
Innovative Technologies of Oil and Gas
Mass spectrometry
Mineral Resources
Nitration
Nitric acid
Oxidation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The relationships of the reaction of the of tar asphaltenes with concentrated nitric acid were studied under various quantitative, temperature, and time conditions. According to IR spectroscopic data, nitration occurs to the highest degree during the action of a 50-fold excess of 64% nitric acid on the asphaltenes at 60°C for 4 hours. Nitration is accompanied by oxidation side reactions leading to the formation of nitrate, phenolic, carbonyl, and sulfoxide groups. It was established by mass spectrometry that there is a tendency for the number-average and weight-average molecular weights of the nitration products to decrease in comparison with the initial asphaltenes. It was found by electron paramagnetic resonance that the content of stable free radicals and vanadyl complexes in the products of the nitration reaction decreases.
ISSN:0009-3092
1573-8310
DOI:10.1007/s10553-021-01289-w