Demulsification of W/O emulsion by use of high voltage of A.C. fields.

The rate of demulsification of W/O emulsion was studied experimentally, using a batch A.C. electric demulsifier. The oil phase was kerosene, containing Span 80 as a surfactant (Cs = 1-7 wt %), and LIX64N as an extraction reagent (CLIX=0-8wt%). The water phase contained an electrolyte such as NaCl, H2SO4 or CuSO4 (CE = 0-0.6 mol/dm3). It is clarified that the rate of demulsification is proportional to C-0.5S and increases as CLIX and CE increase. An experimental equation is presented for estimation of the demulsification rate.