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Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Shabalin, K. V. / Musin, L. I. / Foss, L. E. / Nagornova, O. A. / Morozov, V. I. / Borisov, D. N. / Yakubov, M. R.

Stepwise oxidation-sulfonation of vacuum residue asphaltenes was carried out. It was shown that oxidation leads to the formation of carboxyl groups around the perimeter of the polyaromatic core. By contrast to ammonium persulfate, potassium dichromate oxidizes to a greater extent the sulfur atoms in the composition of asphaltenes which undergo desulfurization in an acidic medium. In the oxidation-sulfonation products the C/H parameter increases by a factor of 2.1, and the O/C parameter, by a factor of 19. The reaction of sulfonation of the oxidized asphaltenes proceeds less efficiently than that of the initial asphaltenes, as expressed in the value of the total static exchange capacity. Complexes of the oxidation-sulfonation products of asphaltenes with divalent copper cations were converted to redox ion-exchange materials by subsequent reduction with sodium dithionite in an alkaline medium.

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Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Shabalin, K. V. / Musin, L. I. / Foss, L. E. / Nagornova, O. A. / Morozov, V. I. / Borisov, D. N. / Yakubov, M. R.

Stepwise oxidation-sulfonation of vacuum residue asphaltenes was carried out. It was shown that oxidation leads to the formation of carboxyl groups around the perimeter of the polyaromatic core. By contrast to ammonium persulfate, potassium dichromate oxidizes to a greater extent the sulfur atoms in the composition of asphaltenes which undergo desulfurization in an acidic medium. In the oxidation-sulfonation products the C/H parameter increases by a factor of 2.1, and the O/C parameter, by a factor of 19. The reaction of sulfonation of the oxidized asphaltenes proceeds less efficiently than that of the initial asphaltenes, as expressed in the value of the total static exchange capacity. Complexes of the oxidation-sulfonation products of asphaltenes with divalent copper cations were converted to redox ion-exchange materials by subsequent reduction with sodium dithionite in an alkaline medium.

Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Shabalin, K. V. / Musin, L. I. / Foss, L. E. / Nagornova, O. A. / Morozov, V. I. / Borisov, D. N. / Yakubov, M. R.

Stepwise oxidation-sulfonation of vacuum residue asphaltenes was carried out. It was shown that oxidation leads to the formation of carboxyl groups around the perimeter of the polyaromatic core. By contrast to ammonium persulfate, potassium dichromate oxidizes to a greater extent the sulfur atoms in the composition of asphaltenes which undergo desulfurization in an acidic medium. In the oxidation-sulfonation products the C/H parameter increases by a factor of 2.1, and the O/C parameter, by a factor of 19. The reaction of sulfonation of the oxidized asphaltenes proceeds less efficiently than that of the initial asphaltenes, as expressed in the value of the total static exchange capacity. Complexes of the oxidation-sulfonation products of asphaltenes with divalent copper cations were converted to redox ion-exchange materials by subsequent reduction with sodium dithionite in an alkaline medium.

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Title:

Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Additional title:

Pet. Chem.

Contributors:

Shabalin, K. V. (author) / Musin, L. I. (author) / Foss, L. E. (author) / Nagornova, O. A. (author) / Morozov, V. I. (author) / Borisov, D. N. (author) / Yakubov, M. R. (author)

Published in:

Petroleum Chemistry ; 62 ; 222-228

Publication date:

2022-02-01

Size:

7 pages

ISSN:

1555-6239 , 0965-5441

DOI:

https://doi.org/10.1134/S096554412206010X

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

asphaltenes , sulfonation , oxidation , redox ion-exchange materials Chemistry , Industrial Chemistry/Chemical Engineering , Chemistry and Materials Science

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