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Flooding characteristics of aqueous two‐phase systems in a countercurrent sieve‐plate column
Author(s) -
Hamidi Ahd,
van Berlo Mos,
Luyben Karel ChAM,
van der Wielen Luuk AM
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199903)74:3<244::aid-jctb31>3.0.co;2-w
Subject(s) - countercurrent exchange , flooding (psychology) , sieve (category theory) , aqueous solution , chromatography , plate column , environmental science , chemistry , materials science , thermodynamics , mathematics , physics , psychology , combinatorics , psychotherapist
The hydraulic capacity of countercurrent liquid–liquid extractors is constrained by its flooding characteristics. This study presents flooding data for aqueous two‐phase systems containing PEG 4000 and Na 2 SO 4 at various concentrations in a countercurrently operated sieve‐plate column in the absence of solutes. Flooding limits, average droplet sizes and dispersed phase hold‐ups at flooding conditions were measured as well as densities, interfacial tensions and viscosities. A correlation proposed by Richardson and Zaki ( Trans IChemE 32 :35–53 (1954)) was used successfully for the description of the slip velocities and thus maximum column throughputs. © 1999 Society of Chemical Industry