Process for preparing various metal hydroxides and oxides and their derivatives
The described process addresses the high costs and inefficiencies of existing methods by using lithium hydroxide reactions and electromembrane technology to recycle chemicals, thereby reducing costs and improving the production of metal hydroxides and oxides.
JP7746332B2Active Publication Date: 2025-09-30NEMASKA LITHIUM
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Patent Information
- Application Number
- JP2023097816
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-09-21
- Filing Date
- 2023-06-14
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2038-11-22
AI Technical Summary
Technical Problem
Existing processes for preparing nickel-cobalt-manganese hydroxides, nickel-cobalt-aluminum hydroxides, lithium-cobalt hydroxides, and their corresponding oxides are costly and inefficient due to high chemical consumption.
Method used
A process involving the reaction of metal sulfates with lithium hydroxide and optional chelating agents, followed by an electromembrane process to convert lithium sulfate to lithium hydroxide, allowing for recycling and separation of metal hydroxides and oxides, reducing chemical consumption and costs.
Benefits of technology
The process significantly reduces production costs by recycling lithium hydroxide and other chemicals, enhancing the efficiency of metal hydroxide and oxide production.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a process that can reduce the manufacturing cost of hydroxides, which serve as raw materials for cathode materials of lithium-ion batteries.SOLUTION: A process for preparing a metal hydroxide comprises reacting a metal sulfate comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese and aluminum with sodium hydroxide and optionally a chelating agent in order to obtain a solid comprising the metal hydroxide and a liquid comprising sodium sulfate; separating the liquid and the solid from one another to obtain the metal hydroxide; submitting the liquid comprising sodium sulfate to an electromembrane process for converting sodium sulfate into sodium hydroxide; and reusing the sodium hydroxide obtained by the electromembrane process for reacting with the metal sulfate.SELECTED DRAWING: Figure 27
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