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公开(公告)号：US10239764B2
公开(公告)日：2019-03-26
申请号：US15577507
申请日：2016-05-20
发明人： Toshirou Tan , Masatoshi Takano , Hideki Ohara , Satoshi Asano
摘要： An aqueous cobalt chloride solution purification method, in which impurities can be efficiently removed from a cobalt salt solution, includes bringing metallic nickel into contact with an aqueous solution containing cobalt chloride to remove an impurity by a substitution reaction, in which the pH of the aqueous solution containing cobalt chloride is adjusted to not less than 1.5 and not more than 2.5. Since the pH of the aqueous solution containing cobalt chloride is adjusted to not less than 1.5 and not more than 2.5, a passive film on a surface of the metallic nickel can be effectively removed, and the metallic nickel comes in contact with the aqueous solution containing cobalt chloride, so that an impurity more noble than the metallic nickel can be precipitated by the substitution reaction. The metallic nickel is only brought into contact with the aqueous solution containing cobalt chloride, and the impurity can be easily removed.
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公开(公告)号：US20140322107A1
公开(公告)日：2014-10-30
申请号：US14356322
申请日：2012-11-01
发明人： Kazunari Maeba , Yukie Kawakami , Keiji Kudo , Masatoshi Takano , Hitoshi Ishida , Satoshi Asano , Masahiro Tanaka
IPC分类号： C22B59/00
CPC分类号： C22B59/00 , C22B3/44 , C22B7/007 , Y02P10/234
摘要： The object of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high recovery rate without using any expensive chemicals, solvents or the like. In the present invention, a water-soluble salt other than sulfate ions is allowed to coexist with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.
摘要翻译： 本发明的目的是提供一种回收稀土元素的方法，其能够在不使用任何昂贵的化学品，溶剂等的情况下以高回收率有效地回收稀土元素。 在本发明中，使除硫酸根离子以外的水溶性盐与含有稀土元素的水溶液共存，然后向该水溶液中添加碱金属硫酸盐，由此生成双硫酸盐沉淀物 的稀土元素。
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公开(公告)号：US20190194031A1
公开(公告)日：2019-06-27
申请号：US16329400
申请日：2017-09-01
CPC分类号： C01G53/10 , B01D11/0492 , C01G51/003 , C01G51/10 , C01G53/003 , C01P2006/40 , Y02P10/234
摘要： Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid solution in parallel. In the first step, the sulfuric acid solution is subjected to solvent extraction by an extractant, thereby obtaining a first organic solvent after extraction In the second step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant.
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公开(公告)号：US09404169B2
公开(公告)日：2016-08-02
申请号：US14437466
申请日：2014-04-08
发明人： Masatoshi Takano , Yoshitomo Ozaki , Satoshi Asano , Masahiro Goto , Fukiko Kubota , Yuzo Baba
CPC分类号： C22B59/00 , B01J20/22 , B01J20/26 , B01J45/00 , B01J49/50 , C22B3/24 , C22B3/42 , C22B7/005 , Y02P10/234
摘要： To efficiently and selectively recover scandium from an acid solution containing calcium, magnesium and scandium. In the present invention, an acid solution containing calcium, magnesium and scandium is brought into contact with a scandium recovering resin impregnated with an amide derivative represented by the following general formula for an hour or more. In the formula, R1 and R2 each represent the same or different alkyl groups. The alkyl group can be a straight chain or a branched chain. R3 represents a hydrogen atom or an alkyl group. R4 represents a hydrogen atom or any group other than an amino group, which is bound to the α carbon as an amino acid. The amide derivative is preferably any one or more of glycinamide derivatives, histidinamide derivatives, lysinamide derivatives and aspartic acid amide derivatives.
摘要翻译： 有效和有选择地从含有钙，镁和钪的酸溶液中回收钪。 在本发明中，使含有钙，镁和钪的酸溶液与浸渍有下述通式所示的酰胺衍生物的钪回收树脂接触1小时以上。 在该式中，R 1和R 2各自表示相同或不同的烷基。 烷基可以是直链或支链。 R3表示氢原子或烷基。 R4表示氢原子或氨基以外的任何与α碳结合的氨基酸的基团。 酰胺衍生物优选为甘氨酰胺衍生物，组氨酸酰胺衍生物，赖氨酰胺衍生物和天冬氨酰胺衍生物中的一种或多种。
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公开(公告)号：US20220154308A1
公开(公告)日：2022-05-19
申请号：US17437588
申请日：2020-03-16
发明人： Hideki Ohara , Shota Sanjo , Masatoshi Takano , Satoshi Asano , Hiroshi Kobayashi , Yusuke Senba , Hiroto Watanabe
摘要： A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obtain a post-extraction solution containing cobalt and nickel with the impurities reduced.
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公开(公告)号：US10577255B2
公开(公告)日：2020-03-03
申请号：US16329400
申请日：2017-09-01
摘要： Provided is a method for producing solutions, by which two solutions, namely a high-purity nickel sulfate solution and a mixed solution of nickel sulfate and cobalt sulfate are able to be obtained at the same time from a sulfuric acid solution containing nickel, cobalt and calcium. A method for producing solutions according to the present invention uses a sulfuric acid solution containing nickel, cobalt and calcium and performs a first step S1 for producing a mixed solution of nickel sulfate and cobalt sulfate from the sulfuric acid solution and a second step S2 for producing a solution of nickel sulfate from the sulfuric acid solution in parallel. In the first step, the sulfuric acid solution is subjected to solvent extraction by an extractant, thereby obtaining a first organic solvent after extraction. In the second step, the sulfuric acid solution is subjected to solvent extraction by means of an extractant.
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公开(公告)号：US09347115B2
公开(公告)日：2016-05-24
申请号：US14356322
申请日：2012-11-01
发明人： Kazunari Maeba , Yukie Kawakami , Keiji Kudo , Masatoshi Takano , Hitoshi Ishida , Satoshi Asano , Masahiro Tanaka
CPC分类号： C22B59/00 , C22B3/44 , C22B7/007 , Y02P10/234
摘要： The object of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high recovery rate without using any expensive chemicals, solvents or the like. In the present invention, a water-soluble salt other than sulfate ions is allowed to coexist with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.
摘要翻译： 本发明的目的是提供一种回收稀土元素的方法，其能够在不使用任何昂贵的化学品，溶剂等的情况下以高回收率有效地回收稀土元素。 在本发明中，使除硫酸根离子以外的水溶性盐与含有稀土元素的水溶液共存，然后向该水溶液中添加碱金属硫酸盐，由此生成双硫酸盐沉淀物 的稀土元素。
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