Pseudo-emulsions

Alguacil, F.J., Alonso, M., Lopez, F.A. and Lopez-Delgado, A. (2009) Application of pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) for recovery of Cr (III) from alkaline solutions. Separation and Purification Technology, In Press. Corrected Proof. 

Sonawane, J.V., Pabby A.K. and Sastre, A.M. (2007) Au(I) extraction by LIX-79/ n-heptane using the pseudo-emulsion-based hollow-fiber strip dispersion (PEHFSD) technique. Journal of Membrane Science, 300, 147. 

Working Function of Pseudo-Emulsion Based Hollow Fiber Strip Dispersion. 1058... 

WORKING FUNCTION OF PSEUDO-EMULSION BASED HOLLOW FIBER STRIP DISPERSION... 

Roy, S.C. et al.. Pseudo-emulsion based hollow fiber strip dispersion techiniqe A novel application with U(VI)-TBP system. Theme meeting on Trends in Separation Science and Technology, (SESTEC), BARC, Mumbai, 2004. 

Sonawane, J. V., Pabby, A. K., Sastre, A. M. (2008). Pseudo-emulsion based hollow fiber strip dispersion A novel methodology for gold recovery. AIChE J., 54, 453-63. 

Promising results are shown by recently developed integrated SLM-ELM [84, 85] systems. These techniques are known as supported liquid membrane with strip dispersion (SLMSD), pseudo-emulsion-based hollow fiber strip dispersion (PEHFSD), emulsion pertraction technology (EPP), and strip dispersion hybrid Hquid membrane (SDHLM). AH techniques are the same the organic phase (carrier, dissolved in diluent) and back extraction aqueous phase are emulsified before injection into the module and can be separated at the module outlet. The difference is only in the type of the SLM contactors hoUow fiber or flat sheet and in the Hquid membrane (carrier) composition. These techniques have been successfuUy demonstrated for the removal and recovery of metals from wastewaters. Nevertheless, the techniques stiU need to be tested in specific apphcations to evaluate the suitabUity of the technology for commercial use. 

Alguacil FJ, Alonso M, Lopez FA, Lopez-Delgado A (2010) Pseudo emulsion membrane strip dispersion (PEMSD) pertraction of chromium(VI) using CYPHOS ILlOl ionic liquid as carrier. Environ Sci Technol, 44 7504-7508... 

An air flotation method was proposed for breaking o/w emulsions after its treatment with a cationic, high molecular weight flocculent. It has been found that in the presence of the flocculent the emulsion film is less stable than the starting pseudo-emulsion film, which determines the efficiency of the process [246]. The flocculent improves oil spreading on the water-air surface, thereby enhancing separation efficiency. 

Schramm [257] considers it a big problem that foams are sensitive to the contact with oil under porous medium in oil recovery. While proposing a several foam breaking mechanisms under reservoir conditions, the author believes the emulsification process of oil in water is the most important step. In emulsification, the contact area of pseudo-emulsion films increases with the oil contents. In case the pseudo-emulsion films are stable, the foam stability and thus the process efficiency increases. Thinning of pseudo-emulsion films leads to its rupture when gas is continuously injected into the media, flooded with a surfactant solution at residual oil... 

In other advanced SILMs technologies, though not essentially SILMs in themselves, they used a solid microporous barrier to separate the aqueous phase from the organic one. Including in this concept are the nondispersive solvent extraction (NDSX) and pseudo-emulsion-based hollow-fiber strip dispersion (PEHFSD). 

The information provided by the equilibrium isotherms depicted in Figure 29.5 confirms the commercial selective carrier bis(2,4,4-trimethylpenthyl) phosphinic acid (Cyanex 272) as a suitable reagent to formulate the liquid membrane due to its capacity to selectively separate iron and zinc from chromium under the typical pH conditions of the passivation baths. Therefore, the typical composition of the pseudo emulsion employed in the EPT regeneration process contains Cyanex 272 and sulfuric acid as stripping agent, and the extraction and BEX of zinc and iron are described, respectively, by the following reversible chemical reactions ... 

Alguacil F.J., GarcIa-DIaz I., L6pez F., and Sastre A.M., Cobalt(II) membrane-extraction by DP-8R/Exxsol DlOO using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing, Sep. Purif. Technol. 80,467, 2011. 

I., and Tayibi H., Pseudo-emulsion based hollow fiber with strip dispersidn peitraction of iron(III) using (PJMTH )2(S04 ") ionic hquid as carrier, Chem. Eng. J. 157, 366, 2010. 

Gonzalez R., Cerpa A. and Alguacil F.J., Nickel(II) removal by mixtures of Acorga M5640 and DP8R in pseudo-emulsion based hollow fiber with strip dispersion technology, Chemosphere 81, 1164, 2010. 

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