Tanaka Kikinzoku Kogyo K.k.

Dowa Mining Co., Ltd.

Kosaka Smelting & Refining Co., Ltd.

Shoei Takada

Hiroshi Inoue

Nobuyasu Ezawa

Hitoshi Masuda

A process of recovering a platinum group metal from a waste catalyst comprising a first step which comprises heating and melting the catalyst impregnated with the platinum group metal, copper and/or the oxide of copper, a flux component and a reductant component to form a layer containing the metal copper into which the platinum group metal is absorbed and another layer of the oxide, and then separating the metal copper; and a second step which comprises supplying air or oxygen as an oxidant to the separated metal copper for oxidizing under heating and melting to form a layer of partially oxidized metal copper and another layer of the metal copper containing the concentrated platinum group metal, and separating it. This process enables the economical recovery of the platinum group metal from the waste catalyst in a short period of time with high recovery rate.

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Akita, Japan

Shoei Takada