Method for producing nickel powder having low carbon concentration and low sulfur concentration
US10500644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2015 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Mar 8, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided a production method for reducing the content level of sulfur and carbon which are impurities in nickel powder to improve the quality of nickel powder produced by a complexing reduction method. The method of producing nickel powder having low carbon and sulfur concentrations includes: a complexing treatment of adding a complexing agent to a nickel sulfate aqueous solution to form a solution containing nickel complex ions; maintaining the solution containing nickel complex ions at a solution temperature of 150 to 250° C. in a pressure vessel and blowing hydrogen gas into the solution containing nickel complex ions to perform hydrogen reduction to produce nickel powder; washing the nickel powder with water; and then roasting the nickel powder washed with water in a mixed gas atmosphere of nitrogen and hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.