The rate of demulsification of W/Oemulsion was studied experimentally, using a batch A.C. electric demulsifier. The oil phase was kerosene, containing Span 80 as a surfactant (Cs = 1-7wt %), and LIX64N as an extraction reagent (CLix = 0-8 wt %).The water phase contained an electrolyte such as NaCl, H2SO4or CuSO4 (CE=0-0.6 mol/dm3). It is clarified that the rate of demulsification is proportional to C^°5 and increases as Cux and CE increase. An experimental equation is presented for estimation of the demulsification rate.
Flow curves of W/O emulsions for the liquid surfactant membrane process were studied. As the oil phase, kerosene, toluene and a mixture of kerosene and liquid paraffin were used. Span 80 was used as the surfactant. The flow curve was measured with a capillary viscometer and a cone plate rheometer. The W/O emulsions showed the Ostwald flow curve. The effect of volume fraction
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