Oxidation of Petroleum Asphaltenes Coupled with Iodination

Oxidation of Petroleum Asphaltenes Coupled with Iodination

Asphaltenes

Gasoline

Oxidation

Sulfur compounds

X ray powder diffraction

X ray photoelectron spectroscopy

Halogenation

Iodine compounds

Potassium iodide

Oxidation of petroleum asphaltenes by potassium iodide (KI) is described. Oxidation under mild conditions is shown to be accompanied by iodination of the asphaltene aromatic core. The inducing reaction is the oxidation of sulfide sulfur atoms in the asphaltenes with reduction of iodate anion to molecular iodine

the coupled reaction, electrophilic substitution. X-ray photoelectron spectroscopy detected an increase in the mass fraction of oxygen as compared with the initial sample and formation of CI bonds. IR spectroscopy found that oxidation of the asphaltenes is accompanied by the formation of carboxyl and sulfoxide groups. Raman spectroscopy revealed a decrease in the size of the oxidized asphaltene molecules as compared to the native asphaltenes. X-ray powder diffraction analysis showed a decrease in the interplanar spacing of the asphaltene oxidation product that was due to ordering and a denser arrangement of the aliphatic fragments. 2020, Springer Science+Business Media, LLC, part of Springer Nature.

558-569

4

56

Chemistry and Technology of Fuels and Oils

2020

Shabalin, K.V.

Foss, L.E.

Musin, L.I.

Nagornova, O.A.

Gubaidullin, A.T.

Saifina, A.F.

Khannanov, A.A.

Vakhitov, I.R.

Borisov, D.N.

journalArticle

93092

10.1007/s10553-020-01168-w