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Production process of trimanganese tetraoxide and lithium manganese oxide
US9450243B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9450243-B2 |
| Application number | US-201314386480-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 21, 2013 |
| Priority date | Mar 22, 2012 |
| Publication date | Sep 20, 2016 |
| Grant date | Sep 20, 2016 |
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Abstract
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To provide trimanganese tetraoxide having a high tap density and a uniform particle size distribution, and its production process. Trimanganese tetraoxide having a tap density of at least 1.5 g/cm 3 and a relative standard deviation of the particle size of at most 40%. A process for producing such trimanganese tetraoxide, which comprises a step of mixing a manganese aqueous solution and an alkaline aqueous solution so that the oxidation-reduction potential is at least 0 mV and OH − /Mn 2+ (mol/mol) is at most 0.55.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing the trimanganese tetraoxide which comprises mixing a manganese aqueous solution and an alkaline aqueous solution of sodium hydroxide or potassium hydroxide so that the oxidation-reduction potential is at least 0 mV and OH − /Mn 2+ (mol/mol) is at most 0.55, wherein a complexing agent is not used when the manganese aqueous solution and the alkaline aqueous solution are mixed, and wherein the trimanganese tetraoxide has a tap density of at least 1.5 g/cm 3 and a relative standard deviation of the particle size of at most 40%. 2. The process for producing the trimanganese tetraoxide according to claim 1 , wherein OH − /Mn 2+ (mol/mol) is at least 0.35. 3. The process for producing the trimanganese tetraoxide according to claim 1 , wherein the oxidation-reduction potential is at least 40 mV. 4. The process for producing the trimanganese tetraoxide according to claim 1 , wherein the trimanganese tetraoxide is directly precipitated from the manganese aqueous solution. 5. The process according to claim 1 , wherein the tri manganese tetraoxide has an average particle size of at least 1 μm. 6. The process according to claim 1 , wherein the tri manganese tetraoxide has an average particle size of at most 20 μm. 7. The process according to claim 1 , wherein the tri manganese tetraoxide has a relative standard deviation of the particle size of at most 35%. 8. A method for producing a lithium manganese oxide, comprising mixing the trimanganese tetraoxide as produced by the method of claim 1 with at least one of lithium and a lithium compound, and heating the mixture.
Assignees
Inventors
Classifications
- H01M4/505Primary
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
Cross-Sectional Technologies · mapped topic
Powder tap density · CPC title
containing lithium, e.g. Li2MnO3 or Li2(MxMn1-x)O3 · CPC title
Micrometer sized, i.e. from 1-100 micrometer · CPC title
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- What does patent US9450243B2 cover?
- To provide trimanganese tetraoxide having a high tap density and a uniform particle size distribution, and its production process. Trimanganese tetraoxide having a tap density of at least 1.5 g/cm 3 and a relative standard deviation of the particle size of at most 40%. A process for producing such trimanganese tetraoxide, which comprises a step of mixing a manganese aqueous solution and an alk…
- Who is the assignee on this patent?
- Tosoh Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/505. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 20 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).