Conclusions
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1.
The activity of the zeolites for the hydrogenation of piperylene decreases in the order NaA ≈ NaM ≫ NaX > NaY ≈ NaE.
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2.
The selectivity for the hydrogenation of piperylene to n-pentenes on zeolites NaA, NaE, and NaM is not less than 95% with 100% conversion of the original hydrocarbon. In the case of zeolites X and Y the selectivity diminishes with conversion, being ∼80% at ∼60% conversion.
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3.
The 1-pentene/2-pentene ratio in the reaction products and the formation of a small amount of n-pentane by direct hydrogenation of piperylene without the intermediacy of n-pentenes point to the sequential addition of hydrogen atoms or ions to the piperylene molecule.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 97–104, January, 1979.
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Minachev, K.M., Kharlamov, V.V. & Kharatishvili, N.G. Hydrogenation of piperylene on Na zeolites. Russ Chem Bull 28, 86–92 (1979). https://doi.org/10.1007/BF00925403
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DOI: https://doi.org/10.1007/BF00925403