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1. 发明授权

US5198081A Method and electrode for electrochemical recovery of lithium value from aqueous solution 失效
标题翻译：从水溶液中电化学回收锂值的方法和电极
公开(公告)号：US5198081A
公开(公告)日：1993-03-30
申请号：US841562
申请日：1992-02-26
申请人： Hirofumi Kanoh , Kenta Ooi , Yoshitaka Miyai , Shunsaku Katoh
发明人： Hirofumi Kanoh , Kenta Ooi , Yoshitaka Miyai , Shunsaku Katoh
IPC分类号： C25C3/02 , C25C1/02 , C25C1/22 , C25C7/02
CPC分类号： C25C1/02
摘要： A novel and efficient electrochemical method is disclosed for the recovery of lithium value from an aqueous solution containing lithium ions in a relatively low concentration together with ions of various kinds of other metallic impurity elements. The method comprises electrochemical selective adsorption of lithium ions from the aqueous solution on to a specific working electrode by applying a DC voltage of a relatively low DC voltage of 0.1-0.4 volt versus a saturated calomel electrode to the working electrode as the cathode opposed to a counterelectrode as the anode and then desorption of the lithium ions therefrom by applying a DC voltage of 0.7-1.2 volts versus a saturated calomel electrode to the lithium-bearing working electrode as the anode opposed to a counterelectrode as the cathode in an aqueous desorption medium containing an electrolyte such as a lithium salt. At least the surface layer of the working electrode is formed from an oxide of manganese prepared by admixing a manganese compound with a limited amount of a lithium or magnesium compound, converting the mixture into oxides by a heat treatment in an oxidizing atmosphere and then removing the lithium or magnesium therefrom by leaching in an acid solution or by an electrochemical means.
摘要翻译：公开了一种新颖有效的电化学方法，用于从含有相对低浓度的锂离子的水溶液和各种其它金属杂质元素的离子中回收锂值。该方法包括将锂离子从水溶液中电化学选择性吸附到特定工作电极上，通过将相对于饱和甘汞电极的相对低的0.1-0.4伏直流电压的DC电压施加到工作电极上，作为与反电极作为阳极，然后通过向饱和甘汞电极施加0.7-1.2伏特的直流电压，将锂离子与其作为阳极相对的含锂工作电极作为阳极相对于含水解吸介质的水溶液解吸介质中解吸，电解质如锂盐。工作电极的至少表面层由锰化合物与有限量的锂或镁化合物混合制备的锰氧化物形成，通过在氧化气氛中的热处理将混合物转化成氧化物，然后除去通过在酸性溶液中浸出或通过电化学方法浸出，可以得到锂或镁。

2. 发明授权

US4956062A Method for concentration determination of lithium ions 失效
标题翻译：锂离子浓度测定方法
公开(公告)号：US4956062A
公开(公告)日：1990-09-11
申请号：US324040
申请日：1989-03-14
申请人： Kenta Ooi , Yoshitaka Miyai , Shunsaku Katoh
发明人： Kenta Ooi , Yoshitaka Miyai , Shunsaku Katoh
IPC分类号： G01N27/447 , G01N27/30 , G01N27/333 , G01N27/416
CPC分类号： G01N27/333
摘要： A highly sensitive and reliable electrochemical method is proposed for the determination of the lithium ion concentration in an aqueous medium, e.g., blood of a patient suffering depression and administrated with a lithium-containing medicament, by measuring the electromotive force between the medium and a powdery non-selective electrode, which is a non-stoichiometric composite oxide of lithium and manganese of the formula Li.sub.x Mn.sub.2 O.sub.4, x being a positive number smaller than 1, prepared by partially leaching lithium ions out of a spinel-type lithium manganate LiMn.sub.2 O.sub.4 with an acid, dipped in the medium. The ion-selective electrode can be in the form of a thin film or coating layer on an electrode element. This film or layer can be formed of a polymeric resin as a binder for the powdery composite oxide.
摘要翻译：提出了一种高灵敏度和可靠性的电化学方法，用于测定水介质中的锂离子浓度，例如患有抑郁症并服用含锂药物的患者的血液，通过测量介质和粉末状之间的电动势非选择性电极，其是通过用酸将尖晶石型锰酸锂LiMn 2 O 4中的锂离子部分浸出而制备的式Li x Mn 2 O 4的锂和锰的非化学计量的复合氧化物，x是小于1的正数，浸入媒介。离子选择性电极可以是电极元件上的薄膜或涂层的形式。该膜或层可以由作为粉末状复合氧化物的粘合剂的聚合树脂形成。

3. 发明授权

US4665049A Adsorbent for lithium and a method for the preparation thereof 失效
标题翻译：锂吸附剂及其制备方法
公开(公告)号：US4665049A
公开(公告)日：1987-05-12
申请号：US828973
申请日：1986-02-13
申请人： Yoshitaka Miyai , Kenta Ooi , Shunsaku Kato
发明人： Yoshitaka Miyai , Kenta Ooi , Shunsaku Kato
IPC分类号： C22B26/12 , B01J20/02 , B01J20/04 , B01J20/06 , C01D15/00 , C22B26/10
CPC分类号： B01J20/06
摘要： The invention provides an adsorbent for lithium in an aqueous medium capable of adsorbing the lithium value even when the concentration of lithium in the aqueous medium is very low as in natural sea water so as to give an adsorbed amount of lithium on the adsorbent comparable to the content in some low-grade lithium ores. The inventive adsorbent is prepared by the steps comprising (a) impregnating a manganese compound with an alkali, e.g. sodium and potassium, or akaline earth, e.g. magnesium and calcium, metal compound by the adsorption of the impregnant in an aqueous solution on to a water-insoluble manganese compound, coprecipitation of manganese and the impregnant element by admixing aqueous solutions of compounds thereof or powder blending of a manganese compound and an impregnant compound, (b) heat-treating the thus impregnated manganese compound at a temperature sufficiently high to form a composite compound between manganese and the impregnant element and (c) leaching the constituent of the impregnant out of the composite manganese compound after the heat treatment using an acid.
摘要翻译：本发明提供了即使当在水性介质中的锂的浓度如在天然海水中那样非常低时能够吸收锂值的水性介质中的锂吸附剂，从而在吸附剂上得到与吸附剂相当的吸附量一些低档锂矿的含量。本发明的吸附剂通过以下步骤制备：（a）用碱浸渍锰化合物，例如钠和钾，或碱土，例如。镁和钙，通过将浸渍剂在水溶液中吸附到水不溶性锰化合物上的金属化合物，通过混合其化合物的水溶液或锰化合物和浸渍剂化合物的粉末混合来共沉淀锰和浸渍剂元素，（b）在足够高的温度下对这样浸渍的锰化合物进行热处理，以形成锰与浸渍剂元素之间的复合化合物，和（c）在热处理之后，将浸渍剂的组分从复合锰化合物中浸出，酸。

4. 发明申请

US20070029259A1 Method of reducing impurity content in aqueous salt solution 审中-公开
标题翻译：降低盐水溶液中杂质含量的方法
公开(公告)号：US20070029259A1
公开(公告)日：2007-02-08
申请号：US10543530
申请日：2004-02-04
申请人： Hirotaka Kakita , Akinari Sonoda , Kazutoshi Yoshihara , Hiroshi Kamishima , Takahiro Hirotsu , Kenta Ooi , Kazuyuki Takashima , Tetuo Iwasaki , Eiji Santoki
发明人： Hirotaka Kakita , Akinari Sonoda , Kazutoshi Yoshihara , Hiroshi Kamishima , Takahiro Hirotsu , Kenta Ooi , Kazuyuki Takashima , Tetuo Iwasaki , Eiji Santoki
IPC分类号： C02F1/42
CPC分类号： A01G33/00 , B01D15/00 , B01D15/265 , C01D3/16 , Y02A40/88
摘要： A method in which an aqueous water-soluble compound solution containing at least one impurity in a slight amount is passed through a column packed with an adsorbent onto which the impurity is selectively adsorbed to thereby remove the impurity from the aqueous solution, wherein an abnormal phenomenon in adsorption chromatography is caused to obtain an elute fraction having a higher concentration of the trace impurity than the raw solution and this fraction is removed. Thus, the trace impurity can be efficiently removed and the water-soluble compound can be obtained in a high-purity state. Applying this method to aqueous sodium chloride solutions gives sodium chloride crystals reduced in impurity concentration. Dissolving such sodium chloride crystals, which have a low potassium ion concentration, in water provides an aqueous sodium chloride solution for medical use. Also provided is a sodium chloride composition for preparing an artificial seawater for use in alga cultivation which is reduced in magnesium ion or calcium ion concentration.
摘要翻译：将含有少量杂质的含水溶性化合物溶液通过填充有选择性吸附有杂质的吸附剂的柱，从而从水溶液中除去杂质的方法，其中异常现象使吸附色谱法得到具有比原始溶液高的痕量杂质浓度的洗脱级分，并除去该级分。因此，可以有效地除去痕量杂质，并且可以以高纯度的状态获得水溶性化合物。将该方法应用于氯化钠水溶液中使得氯化钠晶体的杂质浓度降低。将具有低钾离子浓度的这种氯化钠晶体溶解在水中，提供用于医疗用途的氯化钠水溶液。还提供了用于制备用于藻类培养的人造海水的氯化钠组合物，其降低了镁离子或钙离子浓度。

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