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Demixing kinetics of phase systems employed for liquid–liquid extraction and correlation with system properties.

Narayan, A. V. and Madhusudhan, M. C. and Raghavarao, K.S.M.S. (2011) Demixing kinetics of phase systems employed for liquid–liquid extraction and correlation with system properties. Food and Bioproducts Processing , 89 . pp. 251-256.

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Abstract

The kinetics of phase demixing in liquid–liquid extraction for model systems comprising PEG 4000/potassium phosphate and t-butanol/ammonium sulfate was studied. The kinetics of demixing depicts the entire demixing pattern of phases of the phase system during and after extraction and hence the study is essential prior to design of large scale gravity phase separators.With an increase in composition, both the systems showed increase in demixing rate (decrease in demixing time). At high tie line length (TLL) and phase volume ratio <1, with salt rich phase as continuous phase, both PEG 4000/potassium phosphate and t-butanol/ammonium sulfate systems showed reduction in demixing time by 59% and 50%, respectively as compared to that at low TLL. An empirical equation proposed in the literature for rate of phase demixing was used to correlate the experimental data. The agreement was better for t-butanol/ammonium sulfate system when compared to PEG 4000/potassium phosphate system.

Item Type: Article
Uncontrolled Keywords: Liquid–liquid extraction; Aqueous two phase system; Aqueous-organic system; Three phase partitioning; Demixing; Tie line length; Interfacial tension
Subjects: 600 Technology > 08 Food technology > 05 Processing and Engineering
Divisions: Food Engineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 20 Jan 2012 05:31
Last Modified: 21 Dec 2016 13:01
URI: http://ir.cftri.com/id/eprint/10535

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