Ube Industries, Inc.

Masaki Kashibe

Katsuo Imatani

Akira Ishikawa

Nobuyoshi Okada

Hideyuki Sugishita

An improved method of recovering a palladium catalyst from a liquid reaction mixture having been produced by oxidative coupling reaction of an aromatic compound in the presence of a catalyst containing palladium(II) salt is disclosed. The improved method comprises heating the liquid reaction mixture under stirring at a temperature of 180.degree. to 280.degree. C. in an atmosphere containing hydrogen gas at a partial pressure of 5 to 60 kg/cm.sup.2 whereby reducing the catalyst in the reaction mixture and precipitating a metallic palladium from the reaction mixture.

Method of recovering palladium catalyst

A process of regenerating a palladium salt catalyst comprising, in combination, steps of:

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Ube, Japan

Masaki Kashibe