Title:
硫酸ニッケル水溶液の製造方法
Document Type and Number:
Japanese Patent JP7354845
Kind Code:
B2
Abstract:
To provide a production method for nickel sulfate aqueous solution capable of inhibiting filtration leakage.SOLUTION: A production method for nickel sulfate aqueous solution comprises: a pressure exudation process of obtaining an exudation slurry including an exudation residue by pressure exudation of a raw material slurry; a neutralization process of obtaining a neutralization slurry including the exudation residue and a mixture of neutralization precipitates by generating a neutralization precipitate of iron included in the exudation slurry; a first filtration process of separating a nickel sulfate aqueous solution from a blended precipitate by filtrating the neutralization slurry; an acid cleaning process of obtaining an acid cleaning slurry by adding an acid aqueous solution to the blended precipitate obtained in the first filtration process to leach nickel; and a second filtration process of separating a nickel recovery liquid from an acid cleaning precipitate by filtrating the acid cleaning slurry. In the pressure exudation process, the liquid phase oxidation-reduction potential (silver/silver chloride electrode standard) of the exudation slurry is controlled in the range of 410-500 mV.SELECTED DRAWING: Figure 1
Inventors:
Tomohiko Yokokawa
Keisuke Shibayama
Keisuke Shibayama
Application Number:
JP2020004532A
Publication Date:
October 03, 2023
Filing Date:
January 15, 2020
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B23/00; C01G53/10; C22B3/04; C22B3/06; C22B3/22; C22B3/44
Domestic Patent References:
| JP2019178013A | ||||
| JP2016210648A | ||||
| JP2018204088A | ||||
| JP2005255893A | ||||
| JP7108109A | ||||
| JP2013253273A | ||||
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| JP2007075679A | ||||
| JP7207355A | ||||
| JP2018192411A | ||||
| JP2004160319A |
Attorney, Agent or Firm:
Patent Attorney Corporation Yamauchi Patent Office
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