Method for producing nickel powder
US10549351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Jul 25, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2301/15
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing nickel powder sequentially includes: a mixing step of adding, to a nickel ammine sulfate complex solution, an insoluble solid as seed crystals and a polyacrylate or lignosulfonate as a dispersant to form a mixed slurry; and a reduction and precipitation step of charging a reaction vessel with the mixed slurry and blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the mixed slurry to form nickel precipitate on the surface of the insoluble solid, wherein the amount of the dispersant added in the mixing step is controlled to control the number of the nickel powder obtained by formation of the nickel precipitate in the reduction and precipitation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.