SELECTIVE CATALYTIC HYDROGENATION OF PROPARGYL ALCOHOL WITH HETEROPOLY ACID-MODIFIED PALLADIUM

Abstract

The Keggin type heteropoly acid was readily reduced with hydrogen in the aqueous phase at 30°C in the presence of Pd(II) or metallic Pd, taking up 1 to 11 molecules of hydrogen per Keggin unit. The palladium catalyst prepared by the H₂-reduction of an aqueous solution containing Pd(II) and heteropoly acid was very effective for the aqueous-phase selective semihydrogenation of propargyl alcohol.