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Journal Articles

New apparatus for liquid-liquid extraction, "emulsion flow" extractor

Yanase, Nobuyuki; Naganawa, Hirochika; Nagano, Tetsushi; Noro, Junji*

Analytical Sciences, 27(2), p.171 - 174, 2011/02

 Times Cited Count:14 Percentile:42.63(Chemistry, Analytical)JP, 2007-136496   Licensable Patent Information Database   Patent publication (In Japanese)

A simple and low-cost apparatus for continuous and efficient liquid-liquid extraction, which does not need continual mechanical forces (stirring, shaking, etc.) other than solution sending, has newly been developed. This apparatus is composed of a column part where an emulsion state fluid flow (emulsion flow) is generated by spouting micrometer-sized droplets of an aqueous phase into an organic phase and a phase separating part where the emulsion flow is destabilized by means of a sudden decrease in its flow rate. In the present study, the performance of an emulsion flow apparatus in the extraction of Yb(III) and U(VI) from aqueous HNO$$_{3}$$ solutions into isooctane containing D2EHPA was evaluated. The mixing efficiency of the emulsion flow apparatus was found to be comparable with that of a popular liquid-liquid extractor, mixer-settler. Moreover, the emulsion flow apparatus proved to have an overwhelming advantage in terms of phase-separating ability.

Oral presentation

New solvent extraction apparatus "Emulsion Flow"

Naganawa, Hirochika; Yanase, Nobuyuki; Nagano, Tetsushi; Mitamura, Hisayoshi; Noro, Junji*

no journal, , 

JP, 2007-136496   Licensable Patent Information Database   Patent publication (In Japanese)

no abstracts in English

Patent

エマルションフローを利用した連続液-液抽出装置

長縄 弘親; 柳瀬 信之; 永野 哲志

not registered

JP, 2007-136496  Patent licensing information  Patent publication (In Japanese)

【課題】撹拌や遠心力などの機械的作用に頼る2液相混合の原理を応用した、既存の連続液-液抽出装置(ミキサセトラ、パルスカラム、遠心抽出器など)に共通する操作性の悪さ、運転・維持コスト高、安全面での不安などの問題を解決でき、種々の産業分野でさらに幅広く利用されると期待できる液-液抽出技術を提供する。 【解決手段】送液のみによってエマルション状態の流れ(エマルションフロー)を発生させる仕組みを作成した。これによって、機械的作用(振とう、撹拌、遠心力など)に依らず、2液相の最良な混合状態をつくりだすことに成功した。また、この方法を原理とする装置を製作した結果、既存の連続液-液抽出装置に共通する上記の問題点のすべてが解決でき、尚且つ、その他の重要項目(迅速性、大量処理能力、効率性、コンパクトさ)については、最良の既存装置(遠心抽出器)に匹敵することがわかった。

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