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Correlations of selectivity parameters for separations extractions of hydrocarbons with fluorochemicals
Author(s) -
Munson M. S. B.
Publication year - 1965
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690110532
Subject(s) - selectivity , chemistry , hydrocarbon , hydrocarbon mixtures , vaporization , solvent , solubility , thermodynamics , hildebrand solubility parameter , solvent extraction , analytical chemistry (journal) , extraction (chemistry) , chromatography , organic chemistry , catalysis , physics
The equation In β 1 2 ε 1 2 x s 2 / T adequately represents the variation of the separation factors for the extraction of hydrocarbon mixtures with fluorochemicals. The selectivity parameter ε 1 2 is a measure of the selectivity of a solvent for hydrocarbons 1 and 2 which is independent of the experimental conditions. With a given solvent it is possible to develop a correlation between ε j i for pairs of hydrocarbons and the heats of vaporization of these hydrocarbons. A group contributions method is also successful in correlating the selectivity parameters. The three fluorochemicals in these experiments, (C 4 F 9 ) 3 N, C 7 F 14 , and C 8 F 16 O, had essentially the same selectivity for hydrocarbon separation which one would expect on the basis of their essentially identical solubility parameters.