Processing hard rock lithium minerals or other materials to produce lithium materials and byproducts converted from a sodium sulfate intermediate product
US-2024425381-A1 · Dec 26, 2024 · US
Process for the recovery of lithium
US2019292629A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019292629-A1 |
| Application number | US-201716345269-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 24, 2017 |
| Priority date | Nov 7, 2016 |
| Publication date | Sep 26, 2019 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A process is divulged for the recovery of lithium from metallurgic slags comprising the steps of roasting spodumene to convert it from the alpha to the beta variant; reacting the beta variant with sulfuric acid, using a stoichiometric excess of acid; repulping the reaction product with water, forming an acidic slurry; neutralizing the acidic slurry to a pH between 5 and 7, by addition of at least one neutralizing agent; filtrating the neutralized slurry, thereby obtaining a lithium bearing solution and a residue; characterized that, in either one or both of the steps of repulping and neutralizing the acidic slurry, lithium-bearing metallurgic slag is added as neutralization agent. The lithium-bearing metallurgic slag is used to substitute at least part of the classic neutralizing agent. The lithium in the slag is released, and added to the lithium liberated from the spodumene.
First claim
Opening claim text (preview).
1 - 7 . (canceled) 8 . Process for the recovery of lithium from metallurgic slags comprising the steps of: roasting spodumene to convert it from the alpha to the beta variant; reacting the beta variant with sulfuric acid, using a stoichiometric excess of acid; repulping the reaction product with water, forming an acidic slurry; neutralizing the acidic slurry to a pH between 5 and 7, by addition of at least one neutralizing agent; and filtrating the neutralized slurry, thereby obtaining a lithium bearing solution and a residue; wherein lithium-bearing metallurgic slag is added in one or more of the steps of reacting, repulping, and neutralizing the acidic slurry. 9 . Process according to claim 8 , wherein the lithium-bearing metallurgic slag is added in either one or both of the steps of repulping and neutralizing the acidic slurry, as a neutralizing agent. 10 . Process according to claim 9 , wherein, in the step of neutralizing the acidic slurry, lithium-bearing metallurgic slag is added as a first neutralization agent until a pH of less than 4 is reached, and a second neutralization agent is added until a pH between 5 and 7 is reached. 11 . Process according to claim 10 , wherein the second neutralization agent comprises CaCO 3 , CaO, or Ca(OH) 2 . 12 . Process according to claim 8 , wherein the lithium-bearing metallurgic slag is produced by smelting of lithium-bearing batteries or their derived products. 13 . Process according to claim 8 , wherein the lithium-bearing metallurgic slag has a by-weight composition according to: 3%<Li 2 O<20%; 38%<Al 2 O 3 <65%; CaO<55%; and, SiO 2 <45%. 14 . Process according to claim 8 , further comprising the steps of purifying the lithium bearing solution, and separating the lithium by precipitation.
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2019292629A1 cover?
- A process is divulged for the recovery of lithium from metallurgic slags comprising the steps of roasting spodumene to convert it from the alpha to the beta variant; reacting the beta variant with sulfuric acid, using a stoichiometric excess of acid; repulping the reaction product with water, forming an acidic slurry; neutralizing the acidic slurry to a pH between 5 and 7, by addition of at lea…
- Who is the assignee on this patent?
- Umicore Nv
- What technology area does this patent fall under?
- Primary CPC classification C22B26/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 26 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).