Development of centrifugal extractor with Taylor vortices for liquid-liquid and liquid-solid nuclide separation systems

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289352
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Takeshita Kenji 東京工業大学, 原子炉工学研究所, 教授 (80282870)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 抽出 / 連続抽出 / 向流操作 / テーラー渦 / 油水分散 / 多段抽出 / エマルジョン / 界面活性

Outline of Final Research Achievements

To recover valuable metals such as Lanthanides and PGMs from HLW, a liquid-liquid countercurrent centrifugal extractor which can induce Taylor vortices has been developed. Following conclusions were obtained. ① Oil-water dispersion behavior has an important role for the extraction and separation behaviors with multiple theoretical stages. ② Both fast extraction kinetics and effective dispersion behavior are needed for the stable extraction operation with high theoretical stages. ③ The improvement of chemical properties and extraction mechanism by the addition of small amount of chemical agents such as surfactant and synergist is effective for the increase of theoretical stages. ④ Back extraction is attained easily by the proposed centrifugal extractor. ⑤ Excellent oil-water dispersion formed in a tapered fluid region is useful for the increase of theoretical stages.

Free Research Field

原子力化学工学、環境化学工学