Method of recovering palladium catalyst

Details Method of recovering palladium catalyst Method of recovering palladium catalyst

1988-06-17

1990-01-23

Konopka, Paul E.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75117, 75121, 502 24, 502 30, 502 53, 560 96, C22B 1104, B01J 2396, C07C 67343

Patent

active

048955965

ABSTRACT:
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.

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