PURPOSE: To produce a powdery noble metal having uniform particle size by reducing ad depositing the noble metal from a mixture of the salts of the noble metals with a reducing agent in a reactor having the inner wall prevented from static electricity by a slipping agent and free from recessed marks.
CONSTITUTION: The noble metal is reduced and deposited by reducing the palladium salt, platinum salt or a mixture of the salts of noble metals containing at least one of palladium or platinum at ≥40°C by using the reducing agent (e.g. hydrazine hydrochloride) composed of at least one or more kind of hydrazine compounds in the reactor (a bag having >0.01mm thickness is preferable) having the inside wall surface formed from an electrically insulating plastic (polyethylene or the like) containing 100-300ppm slipping agent (stearic acid, wax or the like) and free from the recessed marks. As a result, the powdery noble metal having uniform particle size is obtained.
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FUKUI YASUTAKA
SARUGI YURIE
TAKIMOTO AKIO
ITO TAKAHIRO
KONO TAKESHI
