Title:
コバルト回収方法
Document Type and Number:
Japanese Patent JP7350318
Kind Code:
B2
Abstract:
To recover cobalt at high purity from a liquid to be treated in which cobalt and impurity metals are dissolved.SOLUTION: The cobalt recovery method comprises: a step of adjusting the pH to 4 to 7, inclusive by alkali addition to a solution to be treated (step S3); a solid-liquid separation step for separating a precipitate containing of the crystal of the salt of the impurity metal precipitated in step S3 (step S4); a pH adjusting step of adjusting the pH to 7 or higher by alkali addition to the solution to be treated after step S4 (step S5); a solid-liquid separation step of solid-liquid separating the precipitate containing the crystal of the cobalt salt precipitated in step S5 (step S6); a step of dissolving the precipitate after the step S6 with inorganic acid (step S7-1); a step of adjusting the pH tp 4 to 7, inclusive by alkali addition to the re-dissolved liquid (step S7-2); a step of separating the precipitate which have been precipitated in step S7-2 and contain the crystal of the salt of the impurity metal into a supernatant and the slurry containing the precipitate by self weight or centrifugation (step s7-3); a step for adjusting the pH to 7 or higher by alkali addition to the re-dissolved liquid that is the supernatant after the step S7-3 (step S7-4); and a step of solid-liquid separating the precipitate containing a crystal of cobalt salt precipitated in the step S7-4 (step S7-5).SELECTED DRAWING: Figure 1
Inventors:
Yoshiaki Miho
Takaho Takeuchi
Satoru Hirano
Kaho Yokoyama
Kazuhiko Ishida
Takaho Takeuchi
Satoru Hirano
Kaho Yokoyama
Kazuhiko Ishida
Application Number:
JP2020039966A
Publication Date:
September 26, 2023
Filing Date:
March 09, 2020
Export Citation:
Assignee:
Sakura Co., Ltd.
International Classes:
C22B23/00; B09B3/70; C22B3/06; C22B3/44; C22B7/00; H01M10/54
Domestic Patent References:
| JP2013194269A | ||||
| JP2007323868A | ||||
| JP2011132562A | ||||
| JP2012197492A | ||||
| JP2017036478A | ||||
| JP2010277868A | ||||
| JP2004300490A | ||||
| JP2004182533A | ||||
| JP2015183292A |
Foreign References:
| US20190152797 |
Attorney, Agent or Firm:
Saegusa International Patent Office
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