Mitsubishi Materials Corporation

Hiroki Muraoka

Kanji Kuba

Tomohiko Yamaguchi

Akihiro Higami

Sho Nakagawa

Yousuke Kawamura

A method of recovering cobalt and nickel includes the steps of: adding alkaline to an acidic solution containing aluminum together with cobalt and nickel, adjusting pH of the acidic solution to 5 to 7, and converting the cobalt, the nickel and the aluminum into hydroxides thereof; recovering the hydroxides by solid-liquid separation, mixing the recovered hydroxides with an alkaline solution, and leaching aluminum contained in the hydroxides under a liquid condition of pH 8 or more; and recovering a cobalt hydroxide and a nickel hydroxide that aluminum is separated therefrom by solid-separation on a leachate.

Method of recovering cobalt and nickel

In solder powder having an average particle size of 5 &#x3bc;m or less and constituted by a center core and a covering layer covering the center core, wherein the center core consists of an intermetallic compound of silver and tin, or silver and the intermetallic compound of silver and tin, the covering layer consists of tin, and an intermediate layer which consists of an intermetallic compound of copper and tin is interposed between the center core and the covering layer so that at least a part of the center core is covered thereby.

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Iwaki, Japan

Hiroki Muraoka