Method for manufacturing nickel powder, and method for operating reaction facility
US-2018257143-A1 · Sep 13, 2018 · US
Method for producing nickel powder
US2016368059A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016368059-A1 |
| Application number | US-201515117823-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 17, 2015 |
| Priority date | Feb 17, 2014 |
| Publication date | Dec 22, 2016 |
| Grant date | — |
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Abstract
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Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially comprises: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.
First claim
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1 . A method for producing nickel powder, sequentially comprising: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry while maintaining a pressure of a gas phase part in the reaction vessel at 1.0 to 4.0 MPa, to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder. 2 . The method for producing nickel powder according to claim 1 , wherein ammonium sulfate included in the solution containing a nickel ammine sulfate complex has a concentration of 10 to 500 g/L. 3 . The method for producing nickel powder according to claim 2 , wherein, in the reduction step, the mixed slurry when the hydrogen gas is blown has a temperature of 150 to 200° C. 4 . (canceled) 5 . The method for producing nickel powder according to claim 3 , wherein the insoluble solid is one or a combination selected from among nickel, alumina, zirconia, iron, and silica. 6 . The method for producing nickel powder according to claim 1 , wherein, in the reduction step, the mixed slurry when the hydrogen gas is blown has a temperature of 150 to 200° C. 7 . The method for producing nickel powder according to claim 6 , wherein the insoluble solid is one or a combination selected from among nickel, alumina, zirconia, iron, and silica. 8 . The method for producing nickel powder according to claim 1 , wherein the insoluble solid is one or a combination selected from among nickel, alumina, zirconia, iron, and silica.
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- What does patent US2016368059A1 cover?
- Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially comprises: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, an insoluble solid which is insoluble in the solution to form a mixed slurry; …
- Who is the assignee on this patent?
- Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification B22F9/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 22 2016 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).