%0 Journal Article
%T Estudio de separaci車n de fases en sistemas l赤quido-l赤quido usando LIX 984N en fase org芍nica
%A Castillo-Segura
%A J.
%A Biela-Cornejo
%A F.
%A Navarro-Donoso
%A P.
%J Revista de Metalurgia
%D 2012
%I Consejo Superior de Investigaciones Cient赤ficas
%X In this work we studied the sedimentation and coalescence phenomena in liquid-liquid dispersion without chemical reaction, the aqueous electrolyte consisted of 0.25 M sodium sulfate and an organic phase characteristic organic extractant for copper (LIX 984N) diluted in a commercial solvent (Shellsol 24 AR). The phenomena that dominate the phase separation have been studied by several researchers, which proposed a number of models to predict sedimentation and coalescence profiles. In this work we applied a semi-empirical model to describe the phenomena involved, varying the following experimental conditions: percentage of extractant in organic phase (5 - 30 % v / v), continuous phase (aqueous and organic), time and stirring speed (30 - 1800 s and 400 - 1200 rpm respectively). The main results show that from the 800 rpm of agitation this variable has no influence on primary breakup time, in the same way for 180 seconds of stirring produces the same effect. The fraction of dispersed phase in the packing zone found was 0.74. For higher levels of percentage of extractant in organic phase increased the phase separation time as when the organic phase was used as the continuous phase relative to the aqueous phase. We found a partial adjustment of the experimental data in relation to the simulated values , which is attributable to two factors: the initial inertia of the system once the agitation stopped and the existence of different times of inflection points of the curves of sedimentation and coalescence. In the different articles found in literature assume that the above phenomena occur simultaneously. En este trabajo se estudiaron los fen車menos de sedimentaci車n y coalescencia en una dispersi車n l赤quido-l赤quido sin reacci車n qu赤mica, la fase acuosa consisti車 en electrolito de sulfato de sodio 0,25 M y una fase org芍nica de extractante caracter赤stico para el cobre (LIX 984N) diluido en un solvente comercial (shellsol 24 AR). Los fen車menos que dominan la separaci車n de fases han sido estudiados por diversos investigadores, los cuales plantean una serie de modelos para predecir los perfiles de sedimentaci車n y coalescencia. En este trabajo se aplic車 un modelo semi-emp赤rico para describir los fen車menos involucrados, variando las siguientes condiciones experimentales: porcentaje de extractante en fase org芍nica (5 - 30 % v/v), continuidad de fase (acuosa y org芍nica), tiempo y velocidad de agitaci車n (30 - 1.800 s y 400 - 1.200 rpm respectivamente). Los principales resultados muestran que a partir de las 800 rpm de agitaci車n esta variable no presenta influencia en el tiem
%K LIX 984N
%K Phase separation
%K Liquid-liquid dispersion
%K Sedimentation
%K Coalescence
%K LIX 984N
%K Separaci車n de fases
%K Dispersi車n l赤quido-l赤quido
%K Sedimentaci車n
%K Coalescencia
%U http://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/1230/1241