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Enhancement of liquid extraction by an instantaneous, irreversible reaction
Author(s) -
Miller Joseph W.,
Harper Dean O.
Publication year - 1977
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450550509
Subject(s) - ethylene glycol , heptane , iodine , chemistry , extraction (chemistry) , sodium thiosulfate , phase (matter) , thiosulfate , analytical chemistry (journal) , chromatography , inorganic chemistry , organic chemistry , sulfur
A quasi‐steady state analysis was applied to the enhancement of liquid extraction by a chemical reaction. Ethylene glycol drops were allowed to fall through a stationary heptane phase containing iodine (component A) in a 2.42 cm I.D. column operated at varying heights. The overall mass transfer coefficient, after elimination of end effects, for iodine from heptane into the glycol drops was determined to be K° = 0.213 mol/(s.m. 2 ). By the addition of sodium thiosulfate (component B, Na 2 S 2 O 3 ) to the inlet glycol, an instantaneous and irreversible reactionI 2 + 2Na 2 S 2 O 3 → Na 2 S 4 O 6 + 2NaItook place in the glycol phase, increasing the value of K to a maximum value of 0.5 mol/(s.m 2 ).