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Alternative influence of binary surfactant mixtures on the rate of mass transfer in a liquid - liquid extraction process / Javad Saien in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 6925-6932 Titre : Alternative influence of binary surfactant mixtures on the rate of mass transfer in a liquid - liquid extraction process Type de document : texte imprimé Auteurs : Javad Saien, Auteur ; Somayeh Rezabeigy, Auteur Année de publication : 2011 Article en page(s) : pp. 6925-6932 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Liquid  liquid  extraction  Mass  transfer  Surfactant Résumé : The effect of binary mixtures of cationic and nonionic surfactants dodecyltrimethylammonium chloride (DTMAC) and Triton X―100 on hydrodynamic and mass transfer of the liquid-liquid extraction process was investigated. Mass transfer coefficients of acetone from toluene drops to the continuous aqueous phase and inverse direction were obtained. For the acetone analysis, gas chromatography was used. The rate of mass transfer closely relates to the adsorption behavior of surfactant mixtures at the interface, and the overall mass transfer coefficient, Kod, exhibits the similar variation of surfactants molecular interaction at the interface. The minimum mass transfer rate appears at Triton bulk mole fractions (surfactants based only) of about 0.01 and 0.2 and the maximum at about 0.6. The latter introduces the best composition to achieve the highest separation rate. Meanwhile, the mass transfer coefficient decreases rapidly with a tiny amount of total surfactants under a constant bulk mole fraction, and the solute transfer is always more for dispersed to continuous phase direction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199910 [article] Alternative influence of binary surfactant mixtures on the rate of mass transfer in a liquid - liquid extraction process [texte imprimé] / Javad Saien, Auteur ; Somayeh Rezabeigy, Auteur . - 2011 . - pp. 6925-6932. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp. 6925-6932 Mots-clés : Liquid  liquid  extraction  Mass  transfer  Surfactant Résumé : The effect of binary mixtures of cationic and nonionic surfactants dodecyltrimethylammonium chloride (DTMAC) and Triton X―100 on hydrodynamic and mass transfer of the liquid-liquid extraction process was investigated. Mass transfer coefficients of acetone from toluene drops to the continuous aqueous phase and inverse direction were obtained. For the acetone analysis, gas chromatography was used. The rate of mass transfer closely relates to the adsorption behavior of surfactant mixtures at the interface, and the overall mass transfer coefficient, Kod, exhibits the similar variation of surfactants molecular interaction at the interface. The minimum mass transfer rate appears at Triton bulk mole fractions (surfactants based only) of about 0.01 and 0.2 and the maximum at about 0.6. The latter introduces the best composition to achieve the highest separation rate. Meanwhile, the mass transfer coefficient decreases rapidly with a tiny amount of total surfactants under a constant bulk mole fraction, and the solute transfer is always more for dispersed to continuous phase direction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24199910