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    • 6. 发明授权
    • 용매추출공정을 이용한 지르코늄과 하프늄의 분리방법
    • 通过溶剂萃取方法分离锆和铪的方法
    • KR101386704B1
    • 2014-04-18
    • KR1020130012519
    • 2013-02-04
    • (주)포스코엠텍한국과학기술연구원
    • 이화영조병원이중기
    • C01G25/00C01G27/00
    • C22B3/0005Y02P10/234
    • A separation method of zirconium and hafnium according to an embodiment of the present invention comprises: an extraction step to manufacture a first extract solution having hafnium extracted by an acid extractant by stirring a first liquid to be stirred including the acid extractant and a crude liquid of an aqueous solution including zirconium, hafnium and sulfuric acid; and a recovery step to recover zirconium included in the first extract solution by manufacturing a citric acid solution after extraction having zirconium re-extracted from the first extract solution by a citric acid solution in the process of stirring a liquid to be stirred including the first extract solution and the citric acid solution. The present invention reduces the amount of the used extractant while greatly enhancing the separation effects of zirconium and hafnium which are difficult to separate, and the present invention can decrease hafnium content in zirconium to 50 ppm or less while increasing the zirconium recovery rate to 97% or greater via an additional zirconium recovery process.
    • 根据本发明实施方案的锆和铪的分离方法包括:提取步骤,通过搅拌包括酸萃取剂的第一待搅拌液体和制备具有酸萃取剂的粗液体制备具有通过酸萃取剂萃取的铪的第一提取溶液, 包括锆,铪和硫酸的水溶液; 以及回收步骤,通过在萃取后的柠檬酸溶液中制备柠檬酸溶液以回收第一提取溶液中的锆,所述柠檬酸溶液在搅拌包括第一提取物的搅拌液体的过程中,通过柠檬酸溶液从第一提取溶液中再提取的锆 溶液和柠檬酸溶液。 本发明在大大提高难以分离的锆和铪的分离效果的同时减少使用的萃取剂的量,本发明可以将锆的铪含量降低至50ppm以下,同时将锆回收率提高至97% 或更高。
    • 9. 发明公开
    • 전극 처리 방법 및 이에 따라 제조된 전극
    • 用于处理电极和制备的电极的方法
    • KR1020130060937A
    • 2013-06-10
    • KR1020110127262
    • 2011-11-30
    • 한국과학기술연구원
    • 하흥용이화영이중기김운조
    • H01M4/88C25B11/00H01L31/04H01G9/04
    • Y02E10/50Y02E60/13H01M4/88C25B11/00H01G9/04H01L31/04
    • PURPOSE: A method for treating an electrode is provided to easily increase pore rate and size of a catalyst layer without deformation of a membrane electrode assembly, thereby improving performance of an electrochemical device. CONSTITUTION: A method for treating a catalyst layer(21) and an electrode including a polymer material binding the catalyst layer comprises a step of removing parts of the polymer material by an ion etching method. The method for treating the electrode controls amount of the being removed polymer material by controlling energy of ion beam and voltage of ion. The number of plasma ion in a plasma ion etching is 1 × 10^14 - 1 × 10^18 ions/cm^2. [Reference numerals] (AA) Plasma etching
    • 目的:提供一种处理电极的方法,以容易地提高催化剂层的孔隙率和尺寸,而不会使膜电极组件变形,从而提高电化学装置的性能。 构成:用于处理催化剂层(21)和包含结合催化剂层的聚合物材料的电极的方法包括通过离子蚀刻方法除去部分聚合物材料的步骤。 用于处理电极的方法通过控制离子束的能量和离子的电压来控制被去除的聚合物材料的量。 等离子体离子蚀刻中的等离子体离子的数量为1×10 ^ 14 -1×10 18离子/ cm 2。 (附图标记)(AA)等离子体蚀刻
    • 10. 发明公开
    • 리튬전지 양극활물질로부터의 리튬 회수 방법
    • 锂离子电池从阴极活性材料中回收锂的方法
    • KR1020120031831A
    • 2012-04-04
    • KR1020100093451
    • 2010-09-27
    • 한국과학기술연구원주식회사 세화엔스텍
    • 이화영조병원고동균고현백
    • C22B26/12C22B7/00
    • Y02P10/212C22B26/12C22B7/007H01M10/54Y02P10/234
    • PURPOSE: A method for recovering lithium from a cathode active material of a lithium battery is provided to obtain high-purity lithium products by preventing purity reduction due to chlorine ion and sulfate ion mixed in the final lithium products. CONSTITUTION: A method for recovering lithium from a cathode active material of a lithium battery comprises the steps of: dissolving a cathode active material of a lithium battery in an oxalic acid aqueous solution to obtain a lithium-dissolved solution, adding caustic soda to the lithium-dissolved solution in order to deposit and remove impurities, mixing the lithium-dissolved solution with ethanol in order to deposit and separate lithium into lithium carbonate, and washing the lithium carbonate with ethanol to obtain lithium carbonate without impurities.
    • 目的:提供从锂电池的正极活性物质中回收锂的方法,通过防止由最终锂产物中的氯离子和硫酸根离子引起的纯度降低而获得高纯度的锂产品。 构成:从锂电池的正极活性物质中回收锂的方法包括以下步骤:将锂电池的正极活性物质溶解在草酸水溶液中以获得锂溶解溶液,向锂中加入苛性钠 溶解溶液以沉积和除去杂质,将锂溶解的溶液与乙醇混合以将锂沉积并分离成碳酸锂,并用乙醇洗涤碳酸锂,得到无杂质的碳酸锂。