Summary
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1.
A critical review of literature data on fractionation data at reduced pressure has been given.
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2.
It has been shown that if mass-transfer is controlled by the liquid phase, the HTU increases with a reduction in pressure; but if it is controlled by the vapor phase, then HTU changes only little with pressure.
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3.
A number of contradictions in studies on vacuum fractionation can be laid to the charge of incorrect physical model set-up.
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4.
The analysis conducted makes it possible to explain the greater part of results on fractionation on packings under reduced pressure.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 12, pp. 10–13, December, 1966.
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Zel'venskii, Y.D., Titov, A.A. & Shalygin, V.A. Some possible reasons for contradictory results in investigations of fractionation at reduced pressure. Chem Technol Fuels Oils 2, 824–828 (1966). https://doi.org/10.1007/BF00731531
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DOI: https://doi.org/10.1007/BF00731531