水酸化ニッケルの精製方法 - Sumitomo Metal Mining Co., Ltd.

Title:

水酸化ニッケルの精製方法

Document Type and Number:

Japanese Patent JP7356642

Kind Code:

B2

Abstract:

To separate magnesium from a hydroxide of nickel containing magnesium at a low cost.SOLUTION: A refining method of nickel hydroxide includes a primary cleaning step for mixing a hydroxide containing nickel and magnesium with a cleaning liquid and forming and cleaning mixed slurry of over pH 6.5 under stirring and then subjecting the obtained slurry to solid-liquid separation to obtain a cleaning waste liquid and a cleaned material. A sulfuric acid solution is added to the cleaned material obtained in the primary cleaning step and leaches the cleaned material in a sulfuric acid leaching step. The leached slurry obtained in the sulfuric acid leaching step is subjected to solid-liquid separation into a leaching solution and a leached residue. The separated leaching solution is subjected to solvent extraction to obtain a nickel sulfate solution. An alkali is added to the nickel sulfate solution for neutralization to obtain nickel hydroxide having the magnesium content reduced.SELECTED DRAWING: None

Inventors:

Shota Mijo
Masatoshi Takano
Hideki Ohara
Sora Kobayashi
Satoshi Asano

Application Number:

JP2019057803A

Publication Date:

October 05, 2023

Filing Date:

March 26, 2019

Export Citation:

Click for automatic bibliography generation Help