Conclusions
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1.
The basic principle of the liquid-phase desorption of n-dodecane and n-pentadecane from the cavities of CaA and MgA zeolites with binder were investigated, using n-octane as the displacer. It was established that the desorption of these hydrocarbons proceeds effectively at a temperature of 200–300°C and a volume velocity of delivery of the displacer of about 2 h−1. The working adsorption capacity of the zeolite with respect to n-paraffins is 6–7% by weight in this case.
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2.
It was found that when MgA zeolite is used, the rate of desorption of n-pentadecane is 20–30% higher than in the case of CaA zeolite.
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3.
It was established that two-fold dilution of the n-paraffin-displacer by a nonabsorbable hydrocarbon leads to a relatively small decrease in the indices of desorption: a 10–20% decrease in the working adsorption capacity of CaA zeolite with respect to n-dodecane and n-pentadecane, with a simultaneous 20% increase in the consumption of the desorbant.
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Literature cited
D. B. Broughton and A. J. Liskus, Proc. Amer. Petrol. Inst., part III, No. 41 (1961). p. 237.
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S. P. Zhdanov and E. N. Egorova, The Chemistry of Zeolites [in Russian], Izd. Nauka (1968).
D. P. Timofeev, The Kinetics of Adsorption [in Russian], Izd-AN SSR (1962).
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 4, pp. 7–10, April, 1971.
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Borisova, L.V., Mirskii, Y.V., Dorogochinskii, A.Z. et al. Investigation of the liquid phase desorption of n-paraffins from CaA and MgA zeolites. Chem Technol Fuels Oils 7, 254–257 (1971). https://doi.org/10.1007/BF00718248
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DOI: https://doi.org/10.1007/BF00718248