Abstract
This paper researched demulsification way for emulsion liquid membrane system extracting rare earth ions in leaching liquid of phosphate rock . Physical demulsification methods included heating, centrifugal, microwave. Chemical demulsification methods such as adding acid, alkal and inorganic salt were employed. The results showed that for Emulsion System A, the best way for demulsification was ultrasonic 30 min, 80 KHz sound intensity, 70°C ultrasonic temperature. The demulsification rate could reach 46% and concentration multiple of rare earth ions was 2 times. For Emulsion System B, centrifugal 90 min by 16000 r/min, the demulsification rate could reach the highest which was 52%, the concentration multiple of rare earth ions was 8 times.
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