Method for producing precursor of lithium adsorbent

Patent metadata

Field	Value
Publication number	US-12090464-B2
Application number	US-201916975036-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Apr 20, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A method for producing lithium manganese oxide that is a precursor of a lithium adsorbent under atmospheric pressure is provided. The method for producing a precursor of a lithium adsorbent comprises the following steps (1) to (3): (1) A 1st mixing step of mixing a manganese salt and alkali hydroxide, so as to obtain a 1st slurry containing manganese hydroxide; (2) a 2nd mixing step of adding lithium hydroxide to the 1st slurry and then mixing the mixture to obtain a 2nd slurry; and (3) an oxidation step of adding an oxidizing agent to the 2nd slurry, so as to obtain a precursor of a lithium adsorbent. The method for producing a precursor of a lithium adsorbent comprises these steps, so that a precursor of a lithium adsorbent can be produced under atmospheric pressure. Therefore, a precursor of a lithium adsorbent can be produced at a limited cost.

First claim

The invention claimed is:

1. A method for producing a precursor of a lithium adsorbent comprising steps (1) to (3):
(1) a 1st mixing step: the step of mixing a manganese salt and alkali hydroxide to obtain a 1st slurry containing manganese hydroxide;
(2) a 2nd mixing step: the step of adding lithium hydroxide to the 1st slurry, and mixing the mixture to obtain a 2nd slurry;
(3) an oxidation step: the step of adding an oxidizing agent to the 2nd slurry to obtain an oxide, wherein the oxidizing agent is sodium hypochlorite.

2. The method for producing a precursor of a lithium adsorbent according to claim 1 , further comprising a step of firing the oxide after the oxidation step, wherein the step of firing the oxide is performed at 500° ° C. to 700° ° C. for 2 to 24 h.

3. A method for producing a precursor of a lithium adsorbent comprising steps (1) to (3):
(1) a 1st mixing step: the step of mixing a manganese salt and alkali hydroxide to obtain a 1st slurry containing manganese hydroxide;
(2) a 2nd mixing step: the step of adding lithium hydroxide to the 1st slurry, and mixing the mixture to obtain a 2nd slurry;
(3) an oxidation step: the step of adding an oxidizing agent to the 2nd slurry to obtain an oxide, and further comprising a step of firing the oxide after the oxidation step, wherein the step of firing the oxide is performed at 500° ° C. to 700° ° C. for 2 to 24 h.

Assignees

• Sumitomo Metal Mining Co
• The Univ Of Kitakyushu

Inventors

• Takano Masatoshi
• Matsumoto Shin-Ya
• Ikeda Osamu
• Kudo Yohei
• Asano Satoshi
• Yoshizuka Kazuharu
• Nishihama Syouhei

Classifications

• C02F2101/10

  Inorganic compounds · CPC title

• C02F1/281

  using inorganic sorbents · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01G45/1214

  containing alkali metals · CPC title