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
Method for Producing High-Purity Calcium
US2017029921A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017029921-A1 |
| Application number | US-201615293381-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 14, 2016 |
| Priority date | Dec 7, 2011 |
| Publication date | Feb 2, 2017 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A high-purity calcium and method of producing same are provided. The method includes performing first sublimation purification by introducing calcium starting material having a purity, excluding gas components, of 4N or less into a crucible of a sublimation vessel, subjecting the starting material to sublimation by heating at 750° C. to 800° C., and causing the product to deposit or evaporate onto the inside walls of the sublimation vessel; and then, once the calcium that has been subjected to first sublimation purification is recovered, performing second sublimation purification by introducing the recovered calcium again to the crucible to the sublimation vessel, heating the recovered calcium at 750° C. to 800° C., and causing the product to similarly deposit or evaporate on the inside walls of the sublimation vessel thereby recovering calcium having a purity of 4N5 or higher.
First claim
Opening claim text (preview).
1 . High-purity calcium having a purity of 4N5 or higher produced by a process comprising the steps of: charging calcium starting material having a purity, excluding the gas components, of 4N or less into a crucible of a sublimation vessel; performing first sublimation purification by heating at 750° C. to 800° C. so that calcium is sublimated and deposits (evaporates) onto the inner side wall of the sublimation vessel; recovering the calcium purified by the first sublimation purification; charging the calcium into a crucible of a sublimation vessel again; performing second sublimation purification by heating at 750° C. to 800° C. so that the calcium is sublimated and deposits (evaporates) onto the inner side wall of the sublimation vessel; and recovering the calcium having a purity of 4N5 or higher. 2 . The high-purity calcium according to claim 1 , wherein the high-purity calcium contains less than 5 ppm of each transition metal element. 3 . The high-purity calcium according to claim 1 , wherein the high-purity calcium contains less than 1 ppm of each transition metal element.
Assignees
Inventors
Classifications
Refining in the solid state · CPC title
- C22B26/20Primary
Obtaining alkaline earth metals or magnesium · CPC title
Refining by applying a vacuum · CPC title
Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action {including acoustic waves; (C22B9/003, C22B9/006, C22B9/05, C22B9/22 take precedence)} · CPC title
Alloys based on an alkali or an alkaline earth metal · CPC title
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- What does patent US2017029921A1 cover?
- A high-purity calcium and method of producing same are provided. The method includes performing first sublimation purification by introducing calcium starting material having a purity, excluding gas components, of 4N or less into a crucible of a sublimation vessel, subjecting the starting material to sublimation by heating at 750° C. to 800° C., and causing the product to deposit or evaporate o…
- Who is the assignee on this patent?
- Jx Nippon Mining & Metals Corp
- What technology area does this patent fall under?
- Primary CPC classification C22B26/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 02 2017 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).