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The Separation of Nonvolatile Substances by Means of Compressed Gases in Countercurrent Processes
Author(s) -
Peter Siegfried,
Brunner Gerd
Publication year - 1978
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.197807461
Subject(s) - vacuum distillation , countercurrent exchange , chemistry , distillation , compressed air , chromatography , air separation , acetone , thermodynamics , organic chemistry , oxygen , physics
Mixtures of nonvolatile and heat‐sensitive substances can be separated by means of compressed gases in countercurrent processes. Moreover, such separations can be carried out at lower temperatures than in vacuum distillation. Addition of an entrainer enables alteration of the relative volatilities of the components. That such a method of separation is feasible on a large scale is illustrated using as example the separation of monoglycerides from a mixture of oleic glycerides at e.g. 110°C/135 bar. Propane is used as compressed gas, and acetone as entrainer.