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Approximate equations for time of batch fractionation
Author(s) -
Johnson A. I.,
Huang ChenJung,
Talbot F. D. F.
Publication year - 1955
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.690010117
Subject(s) - binary number , constant (computer programming) , fractionation , mathematics , cover (algebra) , relative volatility , volatility (finance) , rectification , simple (philosophy) , mathematical analysis , thermodynamics , chemistry , computer science , chromatography , physics , engineering , arithmetic , econometrics , philosophy , epistemology , distillation , programming language , mechanical engineering , power (physics)
Analytical expressions are obtained for the calculation of the time required for batch rectification of binary feeds which may be treated by assuming constant relative volatility and no column holdup. The equations cover constant reflux operations and varying reflux constant product operations for the two cases involving either a large or a small number of theoretical stages. The latter type of calculation has hitherto been possible only by tedious graphical methods. This paper introduces novel pseudoequilibrium curves which lead to simple equations of considerable accuracy. The equations obtained may be rearranged or modified so that other factors such as sharpness of fractionation may be represented analytically.