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The effect of a surfactant on mixer—settler operation
Author(s) -
Horng JiinShiung,
Maa JerRu
Publication year - 1986
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/jctb.280360104
Subject(s) - aqueous solution , pulmonary surfactant , surface tension , dodecane , phase (matter) , aqueous two phase system , mass transfer , volume (thermodynamics) , analytical chemistry (journal) , chemistry , phase inversion , emulsion , mass transfer coefficient , surface area to volume ratio , materials science , chromatography , chemical engineering , thermodynamics , nuclear chemistry , organic chemistry , membrane , biochemistry , physics , engineering
A single stage mixer—settler was used to investigate the effect of surfactant on the mass transfer rate in the system water—HNO 3 —30 vol.% TBP/dodecane. The interfacial tension of this system first falls then rises with increasing sodium lauryl sulphate (SLS) concentration. The addition of SLS makes the stage efficiency, which is closely related to k h a , the product of the individual mass transfer coefficient of HNO 3 in the aqueous phase, and average interfacial area per unit volume of mixing chamber, to increase significantly due to an increase in the value of a. A maximum k h a value of 0.53 litres −1 , a minimum value of interfacial tension, and phase inversion which converted the aqueous phase from continuous to dispersed were observed at around the critical micellar concentration (100 parts 10 −6 ) of SLS in the system of an aqueous to organic phase ratio of 0.2.