Abstract
The action of ozone in the low-temperature ozonization of coal tar from the semicoking of Shubarkol coal (Kazakhstan) is analyzed. Two mechanisms are possible: the electrophilic addition of ozone by π bonds to the molecules of unsaturated compounds; or radical-chain reactions with the formation of a broad spectrum of oxygen-bearing products (carboxylic acids, alcohols, aldehydes, etc.). The presence of each mechanism in tar ozonization is approximately the same. Ozone plays a positive role, by doubling the content of β fraction in the tar; and decreasing the content of the unreactive α1 fraction. The β fraction determines the binding and clinkering properties of pitch, while the α1 fraction prevents the appearance of anisometric needle-coke structures in pitch coking.
Similar content being viewed by others
REFERENCES
Beilina, N.Yu., Zamanov, V.V., Krichko, A.A., Ozerenko, A.A., Ozerenko, E.A., and Forsin, S.B., New concept for coke tar processing, Khim. Tverd. Topl. (Moscow), 2006, no. 5, pp. 22–29.
Kairbekov, Zh.K., Maloletnev, A.S., Smagulova, N.T., and Sabitova, A.N., Ozonolysis of the semicoking tar of coal from the Shubarkol deposit, Solid Fuel Chem., 2018, vol. 52, no. 5, pp. 320–327. https://doi.org/10.3103/S0361521918030047
Kairbekov, Z.K., Maloletnev, A.S., Dzheldybaeva, I.M. et al. Application of modified iron-containing catalysts and preliminary ozonization of coal from the Shubarkol deposit to the hydrogenation of this coal, Solid Fuel Chem., 2017, vol. 51, no. 6, pp. 365–369.
Rus’yanova, N.D., Okislitel’naya pererabotka kamennougol’noi smoly (Oxidative Processing of Coke Tar), Moscow: Metallurgiya, 1975.
Kam’yanov, V.F., Lebedev, A.K., and Sivirilov, P.P., Ozonoliz neftyannykh komponentov (Ozonolysis of Petroleum Components), Tomsk: Rasko, 1997.
Kam’yanov, V.F., Sivirilov, P.P., Litvintsev, I.Yu., and Antonova, T.V., Use of ozonolysis in the processing of natural hydrocarbon raw materials, Khim. Interesakh Ustoich. Razvit., 1999, no. 7, pp. 141–155.
Razumovskii, S.D. and Zaikov, G.E., Ozon i ego reaktsii s organicheskimi soedineniyami (Ozone and Its Reactions with Organic Compounds), Moscow: Nauka, 1974.
Kogan, L.A., Sukhorukova, E.A., and Bednov, V.M., The mechanism of reactions occurring during thermal and oxidative treatment of pitch and high-boiling resin fractions, Khim. Tverd. Topl. (Moscow), 1971, no. 1, pp. 96–104.
Semenova, S.A., Gavrilyuk, O.M., Fedorova, N.I., and Ismagilov, Z.R., Oxidative modification of coal tar with ozone in various media, Solid Fuel Chem., 2012, vol. 46, no. 6, pp. 352–356.
Fedorova, N.I. and Fedyaeva, O.N., Oxidative modification of coal tar with ozone, Vestn. Kuzbass. Gos. Tekh. Univ., 2004, no. 6-2 (44), pp. 44–47.
Razumovskii, S.D., Kislorod—elementarnye formy i svoistva (Oxygen: Elementary Species and Properties), Moscow: Khimiya, 1979.
Friedel, R.A., Infrared in coal structure research, in Applied Infrared Spectroscopy, Kendall, N.D., Ed., New York: Reinhold, 1966, pp. 312–343.
Nakanishi, K., Infrared Absorption Spectroscopy—Practical, San Francisco: Holden-Day, 1962.
Bellamy, L.J., The Infrared Spectra of Complex Molecules, Chichester: Wiley, 1956.
Author information
Authors and Affiliations
Corresponding authors
Additional information
Translated by B. Gilbert
About this article
Cite this article
Maloletnev, A.S., Smagulova, N.T. & Kairbekov, Z.K. Action of Ozone in the Low-Temperature Ozonization of Coal Tar. Coke Chem. 63, 543–547 (2020). https://doi.org/10.3103/S1068364X20110034
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1068364X20110034