Conclusions
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1.
Isoprene and 1,3-pentadiene can be hydrogenated to olefins, without paraffin formation, on a palladium alloy containing 9.8% ruthenium.
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2.
The rate of 1,3-pentadiene hydrogenation is higher when hydrogen feed is by diffusion through the membrane catalyst than when the hydrogen is fed as part of a mixture with the hydrocarbon vapors. With the partial pressures of hydrogen and 1,3-pentadiene each greater than unity, the principal hydrogenation product is cis-2-pentene, with mixture hydrogen feed, and 1-pentene, with hydrogen feed through the membrane catalyst.
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3.
Although the rate of isoprene hydrogenation also increases as one passes from mixture to diffusion hydrogen feed, the effect is not as pronounced as in the 1,3-pentadiene hydrogenation.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2694–2699, December, 1980.
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Gryaznov, V.M., Ermilova, M.M., Gogua, L.D. et al. Selective hydrogenation of diene C5 hydrocarbons on Pd-Ru membrane catalysts. Russ Chem Bull 29, 1871–1876 (1980). https://doi.org/10.1007/BF00949646
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DOI: https://doi.org/10.1007/BF00949646