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The unusual behavior of extractive distillation—Reversing the volatility of the acetone–isopropyl ether system
Author(s) -
Berg Lloyd,
Yeh AnI
Publication year - 1985
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.690310324
Subject(s) - acetone , chemistry , azeotrope , extractive distillation , isopropyl , ether , volatility (finance) , ketone , distillation , organic chemistry , isopropyl alcohol , diethyl ether , financial economics , economics
Extractive distillation can not only negate azeotropes to produce pure compounds by rectification but in some cases will reverse the volatility and bring out the less volatile component before the more volatile component. As an example, isopropyl ether, b.p. = 68.5°C, was distilled off as the overhead from mixtures with acetone, b.p. = 56.2°C, leaving the acetone in the stillpot and column until all the isopropyl ether was removed. This reversal phenomenon does not occur in the isopropyl ether‐methyl ethyl ketone system, although the azeotrope is negated.