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Hydrocracking residual crude in a three-phase fluidized bed to obtain low-sulfur boiler fuel

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Conclusions

  1. 1.

    The possibility has been shown of effectively processing residual crude by the hydrocracking method, using a three-phase fluidized bed, through a continuous, extended pilot plant run; the yield of coke on balance was not over 0.2% on fresh crude.

  2. 2.

    In hydrocracking Aral residual oil, depending on the demands in fuel, one may obtain in winter 93% (based on the residual oil) of low-viscosity boiler fuel having a 1% sulfur content; and, in summer, up to 50% of a diesel fuel fraction plus 38% of low-viscosity boiler fuel having a 1.2% sulfur content. The vanadium content of the boiler fuel does not exceed 21 g/ton.

  3. 3.

    It has been established that it is necessary to limit the “coke” on the catalyst surface to maintain the required operating activity; this is achieved in practice by regular partial renewal of the catalyst charge in the reactor without destroying the technological regime.

  4. 4.

    The dynamics of the hydrogenating and splitting activity of finely-spherical aluminum-cobalt-molybdenum catalyst on changing the extent and multiplicity of catalyst regeneration has been studied. Satisfactory restoration of catalytic activity has been displayed upon a 9-fold oxidative catalyst regeneration, even when there were appreciable deposits on it, introduced into the reactor with the feed.

  5. 5.

    It has been established that spent catalyst from hydrocracking Aral residual oil contains an appreciable amount of vanadium (several percent).

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Literature cited

  1. 1.

    Yu. K. Vail' (U. K. Vail), N. Kh. Manakov (N. C. Manakov),and V. V. Manshilin, Int. Chem. Eng.,8, No. 3 (1968).

  2. 2.

    Yu. K. Vail', N. Kh. Manakov, and V. V. Manshilin, Khim. i Tekhnol. Topliv i Masel, No. 11 (1969).

  3. 3.

    V. V. Manshilin, Yu. K. Vail', and N. Kh. Manakov, ibid., No. 7 (1968).

  4. 4.

    S. P. Rogov, M. V. Rysakov, L. N. Osipov, and I. Ya. Fersht, ibid., No. 6 (1959).

  5. 5.

    Petroleum Refiner,34, No. 5, 106 (1965).

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Additional information

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 7, pp. 1–5, July, 1971.

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Manshilin, V.V., Vail', Y.K., Manakov, N.K. et al. Hydrocracking residual crude in a three-phase fluidized bed to obtain low-sulfur boiler fuel. Chem Technol Fuels Oils 7, 477–482 (1971). https://doi.org/10.1007/BF00716857

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Keywords

  • Vanadium
  • Sulfur Content
  • Hydrocracking
  • Vanadium Content
  • Catalyst Regeneration