Title:
METHOD FOR MANUFACTURING HIGH-PURITY NICKEL SULFATE
Document Type and Number:
WIPO Patent Application WO/2023/286683
Kind Code:
A1
Abstract:
Provided are: a method for removing magnesium, contained as an impurity, from nickel sulfate; and a method for manufacturing high-purity nickel sulfate. The present invention is a manufacturing method characterized by comprising, as steps for manufacturing an aqueous solution of nickel sulfate in which magnesium has been removed from the nickel sulfate, steps indicated by the following (1) through (3): (1) a carboxylation step in which an aqueous solution of nickel sulfate and lithium carbonate are blended to obtain a slurry that contains nickel carbonate as a solid component; (2) a solid/liquid separation step in which the slurry obtained in the carboxylation step is separated into a solid component and a liquid component; and (3) a dissolution step in which the solid component obtained in the foregoing step is dissolved in a solution that contains sulfuric acid.
Inventors:
HONDA TOMOHIRO (JP)
ZHANG ANYU (JP)
YOKOTA MASAYUKI (JP)
TAGAMI NOBUYUKI (JP)
ZHANG ANYU (JP)
YOKOTA MASAYUKI (JP)
TAGAMI NOBUYUKI (JP)
Application Number:
PCT/JP2022/026911
Publication Date:
January 19, 2023
Filing Date:
July 07, 2022
Export Citation:
Assignee:
TODA KOGYO CORP (JP)
International Classes:
C01G53/10; C22B3/08; C22B3/44; C22B23/00
Foreign References:
| JP2014144877A | 2014-08-14 | |||
| JP2010229534A | 2010-10-14 | |||
| CN102115125A | 2011-07-06 | |||
| JP2016056434A | 2016-04-21 | |||
| CN109734107A | 2019-05-10 | |||
| CN109706318A | 2019-05-03 |
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