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Development of Selective Recovery System of Lithium from Deep Ocean Water Using A Novel MnO_2 Type Adsorbent

使用新型MnO_2型吸附剂从深海水中选择性回收锂系统的开发

基本信息

批准号：
14550753
负责人：
YOSHIZUKA Kazuharu
金额：
$ 2.24万
依托单位：
The University of Kitakyushu
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550753/
关键词：
Deep Ocean water Lithium Manganese Dioxide Adsorptive Separation Column Separation 2酸化マンガン

项目摘要

For the purpose of efficient and selective separation and recovery of lithium from deep ocean water, we have carried out: (1)Development of novel λ type manganese dioxide (λ-MnO_2) adsorbents having high selectivity of lithium against sodium, (2)Evaluation of adsorption and separation performance of the λ-MnO_2 adsorbents, (3)Development of granulation method suitable for the λ-MnO_2 adsorbent preventing large pressure drop in the adsorption column of, and (4)Investigation of selective recovery system of lithium from the seawater using the column module. As a result of this research, the followings were obtained.(1)We have successfully developed λ-MnO_2 adsorbent which high-selectively recognizes lithium ion by eluting lithium from spinel type lithium manganese dioxide with aqueous hydrochloric acid. This result was applied to a Japanese patent (Patent pending 2002-46288), as, well as to the publication to journal and international conference.(2)We have carried out the separation of lithium ion from sodium ion using the λ-MnO_2 adsorbent. We have obtained the selectivity of lithium/sodium of over 800 times in case of batchwise method, while 2300 times selectivity in case of column separation method. This selectivity is the best all over the world.(3)We have prepared the granular adsorbents with some millimeter order using with chitin binder. We have observed the structures of granulated adsorbents with a scanning electron microscope as well as elucidated the crystal structure with X-ray diffractometer.(4)We have examined the influence of some experimental conditions on the selective recovery of lithium and sodium in artificial deep ocean water and real seawater in detail. We have obtained highly concentrated lithium solution from seawater under the adsorption-desorption operation of this column module system. This result was applied to the publication to journal and international conference.

为了从深海水中高效和选择性地分离和回收锂，我们进行了以下工作：（1）具有高锂钠选择性的新型λ型二氧化锰（λ-MnO_2）吸附剂的研制。（2）λ-MnO_2吸附剂的吸附分离性能评价。（3）开发了适用于λ-MnO_2吸附剂的造粒方法，防止了吸附柱中的大压降。（4）利用柱模块研究了从海水中选择性回收锂的系统。作为该研究的结果，获得了以下结果。(1)We利用盐酸水溶液洗脱尖晶石型锂锰氧化物中的锂，成功地开发出了高选择性识别锂离子的λ-MnO_2吸附剂。该结果被应用于日本专利（专利申请2002-46288），以及在杂志和国际会议上的公开。(2)We用λ-MnO_2吸附剂进行了锂离子和钠离子的分离。我们得到的锂/钠的选择性在间歇法的情况下超过800倍，而在柱分离法的情况下，选择性为2300倍。这种选择性是世界上最好的。(3)We以甲壳素为粘结剂制备了毫米级的颗粒吸附剂。用扫描电子显微镜观察了颗粒状吸附剂的结构，用X射线衍射仪分析了颗粒状吸附剂的晶体结构。(4)We详细考察了一些实验条件对从人工深海水和真实的海水中选择性回收锂和钠的影响。在此柱模块系统的吸附-脱附操作下，我们从海水中获得了高浓度的锂溶液。这一结果被应用于期刊和国际会议的出版。