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Pitch thermooxidation in distillation reactors

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Abstract

The thermooxidation of pitch in new distillation reactors is investigated industrially in various conditions. It is found that increasing the temperature of one-time evaporation of tar in the stage-II evaporator of the tardistillation department up to 400–405°C increases the proportion of toluene-insoluble materials by 19–21 wt %. A technology for plasticization and thermoxidation of the pitch in distillation reactors is developed. It is shown that moving the distillation reactors closer to the tar-distillation department reduces the temperature drop of the pitch and maintains the temperature in the distillation reactors at 340–370°C, thereby intensifying polycondensation and polymerization. The influence of the heat-treatment time (up to 6–7 h) on the characteristics of the pitch is determined.

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References

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Authors and Affiliations

  1. OAO Zapadno-Sibirskii Metallurgicheskii Kombinat (ZSMK), Novokuznetsk, Russia

    O. A. Konovalov, Yu. S. Amirov, O. Ya. Kozina & T. P. Nekrasova

Authors
  1. O. A. Konovalov
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  2. Yu. S. Amirov
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  3. O. Ya. Kozina
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  4. T. P. Nekrasova
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Additional information

Original Russian Text © O.A. Konovalov, Yu.S. Amirov, O.Ya. Kozina, T.P. Nekrasova, 2008, published in Koks i Khimiya, 2008, No. 10, pp. 34–37.

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Konovalov, O.A., Amirov, Y.S., Kozina, O.Y. et al. Pitch thermooxidation in distillation reactors. Coke Chem. 51, 405–408 (2008). https://doi.org/10.3103/S1068364X08100062

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  • DOI: https://doi.org/10.3103/S1068364X08100062

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