Development of Liquid-liquid Countercurrent Centrifuge Extractor for Nuclide Separation Application

点击翻译按钮获取中文摘要

A new liquid-liquid countercurrent extractor with Taylor-Couette flow was proposed and following three research subjects to improve the extraction performance were studied(1) Increasing the stability of oil-water countercurrent flow(2) Highly efficient extraction using oil-water emulsion(3) Scale-up of extractor and feasibility of total extraction processAs a result, we made clear the chemico-physical properties of oil phase, water phase and inner rotor surface, which were required for the formation of suitable countercurrent flow with highly dispersed oil. By stabilizing the Taylor-Couette flow with oil-water emulsion by the addition of a small amount of PEG(poly-ethyleneglycol), the high-speed extraction with high theoretical stages more than 10 stages were attained. Finally the scale-up tests were carried out. By the use of larger extractor, the increase of theoretical stages was observed for the positive extraction and the high recovery rate for the back extraction