Partial hydrogenation of 3-hexyne over Pd, PdW and PdNi

MARÍA JULIANA MACCARRONE; CECILIA R. LEDERHOS; CAROLINA P. BETTI; FERNANDO COLOMA-PASCUAL; JUAN C. YORI; MÓNICA E. QUIROGA

Lyon

Congreso; XIth European Congress on Catalysis; 2013

The design of highly selective catalytic systems for which there is no need to remove undesirable products clearly falls within the postulates of the so-called ?Green Chemistry?. The objectives of this work are: to evaluate the activity and selectivity of catalysts of low Pd content, both monometallic and bimetallic (W?Pd and Pd?Ni) catalysts during 3-hexyne partial hydrogenation; to evaluate the effect of reaction temperature; and to compare the catalytic performance of these catalysts with commercial Lindlar catalyst. All the catalysts are active in the range of temperatures studied, 273?323 K, even at the lowest temperature. In all the cases the (Z)-alkene stereoisomer is obtained as the main product with a very high selectivity comparable to that obtained with the commercial Lindlar catalyst, besides, the selectivities remained approximately constant with temperature. Activity results indicate that higher throughput of the desired product are obtained for WPd/A (firstly), PdNi/A (secondly) and Pd/A (thirdly) than with commercial Lindlar catalyst.