Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Naganawa, Hirochika
Bunseki Kagaku, 66(11), p.797 - 808, 2017/11
Times Cited Count：6 Percentile：22.86(Chemistry, Analytical)A new liquid-liquid extraction method, called the emulsion-flow method, has recently been developed at Japan Atomic Energy Agency (JAEA). The emulsion-flow method, where low cost, simplicity, high efficiency, compactness, safety, and eco-friendly go together, has attracted attention, and has been expected to bring innovation to liquid-liquid extraction technologies. Compared with conventional industrial apparatuses, an emulsion-flow apparatus successfully combines the lowest cost superior to a spray column and the highest performance (the highest efficiency and the highest processing speed) comparable to a centrifugal extractor. Furthermore, the emulsion-flow method can also be used for collecting particulate components by utilizing their aggregation onto a liquid-liquid interface and for purifying water polluted by oil with its remarkable phase-separating ability.
Naganawa, Hirochika
no journal, ,
no abstracts in English
Naganawa, Hirochika
no journal, ,
By the request from Nuclear Cycle Backend Directorate, an innovative chemical separation technique for radioactive materials and metals, Emulsion-flow method, will be introduced in the seminar at Rokkasho-mura titled Rokkasho Nuclear Fuel Cycle Seminar.
Naganawa, Hirochika
no journal, ,
Liquid-liquid extraction (solvent extraction) is a method for extracting a target component from an aqueous solution into an organic solvent immiscible in water, which is very popular in industry especially in metal refining. In the emulsion flow extractor, the flow of an emulsion, which is a fine mixture of aqueous and organic phases, arises by generating micrometer-sized liquid droplets with a nozzle head, and the emulsion flow then promptly disappears by itself with a drastic change of the cross-section area of its passing in the extractor vessel structure. In short, aqueous and organic phases can be effectively mixed to an emulsified condition and then these two liquid phases can be quickly separated to their perfectly clear condition by only sending liquids. Therefore, the emulsion flow extractor is markedly low-cost and simple compared with conventional apparatuses (mixer-settler, etc.) despite showing the highest performance.
Naganawa, Hirochika; Yanase, Nobuyuki; Nagano, Tetsushi
no journal, ,
In this symposium, the experimental result of solvent extraction of Yb (one of the rare earth elements) and collection of Al
O
solid particles at the same time by using "emulsion flow" method is introduced. The emulsion flow method, that enables simultaneous removal of dissolved and solid components, simply, rapidly and efficiently, was found to be applied to purifying wastewater of automotive aqueous paints.
Naganawa, Hirochika; Nagano, Tetsushi; Yanase, Nobuyuki*
no journal, ,
A new liquid-liquid extraction apparatus, named, emulsion-flow extractor, where low cost, simplicity, compactness, high processing speed, high efficiency, and safety go together, is introduced. The emulsion-flow technique can actualize very efficient liquid-liquid extraction with its high two-phase mixing ability to an emulsion by spraying micrometer-sized oil droplets into a counter-current aqueous solution. Meanwhile, this technology can also actualize more than tenfold processing speed in its very rapid phase separation and less than one fifth cost with its very simple structure workable by only solution sending in comparison with mixer-settler that is the most popular industrial liquid-liquid extraction technique. In addition, the emulsion-flow extractor having no drive part in its main body has less trouble and is safer than the conventional extractor.
長縄 弘親; 永野 哲志
not registered
JP, 2019-113657 
Patent licensing information Patent publication (In Japanese)
【課題】正抽出部100、洗浄部200、及び逆抽出部300が一体となり同期して機能する循環送液システムにおいて、複数回の循環回数によって発現する多段に相当する効果を利用して分離精製される特定の物質の製造方法を提供すること。 【解決手段】正抽出部100、洗浄部200、及び逆抽出部300が一体化して同期的に機能するシステムを用いて、正抽出部100の水相(多くの場合、重液相)が正抽出部100のみの単独部内で循環送液すると同時に、正抽出部100の油相(多くの場合、軽液相)が洗浄部200から逆抽出部300を経て再び正抽出部100に至る横断的な循環送液を行うように制御し、正抽出部100の水相の単独部内循環を複数回行うことによって分離精製される特定の物質の製造方法。
長縄 弘親; 永野 哲志
伊藤 博文*; 佐藤 亮介*
JP, 2019-125457 Patent licensing information
【課題】2液相系において、一方の液相を分散性の高い液滴として、液滴同士の合一を抑制しながら安定的に噴出させるとともに、微細な固形成分の蓄積が起こりにくいエマルション発生用ノズルを提供することである。 【解決手段】エマルション発生用ノズルとして、細管又は細孔を集合させた構造を持つノズルを用いることで、ノズル内への微細な固形成分の蓄積が起こりにくく、また、疎水性又は疎有機性を有する適切な材料あるいは適切な表面加工を施した材料を用いて形成させた細管又は細孔を集合させた構造体を利用すれば、液滴同士の合一を抑制しながら、2液相系において一方の液相を分散性の高い液滴として他方の液相内に安定的に噴出させることができる。
