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The phase composition and texture of alumino-chrome catalysts prepared by simultaneous precipitation

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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Summary

  1. 1.

    Simultaneous precipitation by ammonia at a final pH of 6.4– 7.6 of alumina-chrome catalysts containing up to 25% chromium-III oxide, gives products consisting of a solid solution of their components with a defective spinel structure (γ -phase). For higher chromia concentrations there arises a corundum (rhombohedral) phase consisting of a solid solution of alumina in the chromium oxide.

  2. 2.

    Neitherγ-Cr2O3 norη -Cr2O3 is observed by phase analysis of the catalysts.

  3. 3.

    The effect of composition and temperature of ignition on the texture of the alumino-chrome catalysts has been studied.

  4. 4.

    According to data on the texture of binary catalysts (alumina with chromium-III oxide, nickel oxide, ferric oxide and zirconium-IV oxide), it has been found that the alumina-chromium-III oxide system possesses the greatest thermal stability.

  5. 5.

    It has been shown that there is considerable effect of precipitation pH on the texture of alumino-chrome catalysts.

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Authors and Affiliations

  1. The N. D. Zelinskii Institute of Organic Chemistry, Academy of Sciences of USSR, USSR

    A. M. Rubinshtein, A. L. Klyachko-Gurvich & V. M. Akimov

Authors
  1. A. M. Rubinshtein
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  2. A. L. Klyachko-Gurvich
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  3. V. M. Akimov
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Rubinshtein, A.M., Klyachko-Gurvich, A.L. & Akimov, V.M. The phase composition and texture of alumino-chrome catalysts prepared by simultaneous precipitation. Russ Chem Bull 10, 722–728 (1961). https://doi.org/10.1007/BF00905933

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  • DOI: https://doi.org/10.1007/BF00905933

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