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公开(公告)号：EP4163257A1
公开(公告)日：2023-04-12
申请号：EP22782443.0
申请日：2022-01-20
发明人： OHARA, Hideki , KUDOU, Keiji , HIGAKI, Tatsuya , WATANABE, Hiroto , KONDOU, Natsuki , KANEKO, Takashi , HEGURI, Shin-ichi
摘要： Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method for cobalt sulfate includes: a copper removal step (S1) of adding a sulfurizing agent to a cobalt chloride solution containing one or more impurities of copper, zinc, manganese, calcium, and magnesium and generating a precipitate of sulfide of copper to separate to remove copper; a neutralization step (S2) of adding a neutralizer or a carbonation agent to a cobalt chloride solution having undergone through the copper removal step (S1) and generating cobalt hydroxide or basic cobalt carbonate to separate magnesium; a leaching step (S3) of adding sulfuric acid to the cobalt hydroxide or the basic cobalt carbonate to obtain cobalt sulfate solution; and a solvent extraction step (S4) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant to the cobalt sulfate solution and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium. These steps are sequentially executed.
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公开(公告)号：EP4116262A1
公开(公告)日：2023-01-11
申请号：EP22777940.2
申请日：2022-01-06
发明人： WATANABE, Hiroto , OHARA, Hideki , KUDOU, Keiji , KANEKO, Takashi , HIGAKI, Tatsuya , KONDOU, Natsuki , HEGURI, Shin-ichi
摘要： Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method includes: a first solvent extraction step (S1) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant into contact with a cobalt chloride solution containing impurities, and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium; a copper removal step (S2) of adding a sulfurizing agent to a cobalt chloride solution and generating a precipitate of sulfide of copper to separate to remove copper; a second solvent extraction step (S3) of bringing an organic solvent containing a carboxylic acid-based extractant into contact with a cobalt chloride solution and back extracting cobalt with sulfuric acid after extracting cobalt into the organic solvent to obtain cobalt sulfate solution; and a crystallization step (S4) of the cobalt sulfate solution obtained after having undergone through the second solvent extraction step (S3). These steps are sequentially executed. Without using an electrolysis process, a high purity cobalt sulfate is directly produced by separating cobalt and impurities containing manganese.
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公开(公告)号：EP3190195B1
公开(公告)日：2019-05-22
申请号：EP15831422.9
申请日：2015-07-23
发明人： SHOJI, Hirofumi , HAYATA, Jiro , KUDOU, Keiji , HIGAKI, Tatsuya
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公开(公告)号：EP3190195A1
公开(公告)日：2017-07-12
申请号：EP15831422.9
申请日：2015-07-23
发明人： SHOJI, Hirofumi , HAYATA, Jiro , KUDOU, Keiji , HIGAKI, Tatsuya
CPC分类号： C22B23/0407 , C22B3/44 , C22B7/00 , C22B23/0423 , C22B23/0461 , C22B23/0469 , C25C1/08 , Y02P10/234 , Y02P10/236
摘要： A nickel recovery process capable of decreasing nickel remaining in a byproduct by recovering nickel from the byproduct of electrolytic nickel manufacturing process by chlorine-leaching, and also, capable of simplifying a cementation step simultaneously, is provided. In a nickel recovery step S60, a nickel recovery step S70 and a nickel recovery step S80, nickel is recovered in each step from S 0 slurry, residue flaker and chlorine-leached residue, which are byproducts of electrolytic nickel manufacturing process by chlorine-leaching, by using an aqueous solution containing 80 g/L to 390 g/L of chlorine and 30 g/L to 70 g/L of copper.
摘要翻译： 本发明提供一种镍回收工艺，其能够通过氯浸出从电解镍制造工艺的副产物中回收镍而减少副产物中残留的镍，并且还能够同时简化浸胶步骤。 在镍回收步骤S60，镍回收步骤S70和镍回收步骤S80中，镍从S0浆料，残渣渣和氯浸出残渣（其通过氯浸出的电解镍制造工艺的副产物）的每一步回收， 通过使用含有80g / L至390g / L氯和30g / L至70g / L铜的水溶液。
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