Title:
NICKEL POWDER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/114637
Kind Code:
A1
Abstract:
Provided is a nickel powder production method capable of efficiently producing, by a wet process, a high-quality nickel powder with a low magnesium content ratio. The nickel compound containing magnesium impurities is reduced to a metallic nickel in an alkaline solution with pH exceeding 10.5 to precipitate a nickel powder. Then, a pH adjuster containing at least one type of organic or inorganic acid is added to adjust the pH to 10.5 or less, and after allowing the magnesium impurities present on the surface of the nickel powder to migrate from the surface of the nickel powder to the solution, the nickel powder is washed with pure water. When the pH adjuster is added to reduce the pH to 10.5 or less, the pH is adjusted to 3.0-10.5.
Inventors:
ISHIDA YUYA (JP)
Application Number:
PCT/JP2011/079780
Publication Date:
August 30, 2012
Filing Date:
December 22, 2011
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
ISHIDA YUYA (JP)
ISHIDA YUYA (JP)
International Classes:
B22F9/24
Foreign References:
| JPH07278619A | 1995-10-24 | |||
| JPS4974160A | 1974-07-17 |
Attorney, Agent or Firm:
NISHIZAWA, HITOSHI (JP)
Hitoshi Nishizawa (JP)
Hitoshi Nishizawa (JP)
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Claims: