Catalytic behaviors of the polymer-supported palladium catalysts for hydrogenation and carbonylation

The organic polymer - supported catalysts were,prepared by refluxing the mixture of poly(heterocyclic ether - ketone) (PEK), phenophthalein poly(ether sulfone) (PES - C), and two kinds of polyimides (PCK and PIK) with coordinating atoms (N, O) in their functional chains and PdCl2 in ethanol/benzene, respectively. The carbonylation of allyl bromide and hydrogenation of 1 - octene were carried out under atmospheric pressure and at 40 degrees C. Among these catalysts, Pd - PEK(I) (Pd wt% = 0.22%) and Pd - PES - C(II) (Pdwt% = 0.28%) showed high catalytic activity to the carbonylation and hydrogenation. In particular, the catalysts Pd - PES - C with very low Pd content (0.04 similar to 0.05 wt%) also exhibited very high activity (TOFmax, 345 molCO/molPd . min and 493 molH(2)/molPd . min). The influences of the preparation methods for the catalysts, the swelling effect and the functional chains of the polymers on the catalyst activities were also dicussed.