HYDROGENATION OF FATTY ACIDS ESTERS. II. KINETICS OF HYDROGENATION OF METHYL (Z)- AND (E)-9-OCTADECENOATE CATALYZED BY A ZIEGLER NICKEL CATALYST

Article abstract of DOI:10.1135/cccc19922583

Kinetics of the title reactions has been studied, using nickel(II) 2,4-pentanedionate/triethylaluminium system as a model catalyst.Initial rate measurements showed that in both cases the hydrogenation is first order in hydrogen, zero order in the octadecenoate and a fractional order (close to one) in the catalyst.Both hydrogenations have similar activation energies (30.2 +/- 2.3 kJ mol^-1 and 28.9 +/- 2.6 kJ mol^-1 for the (Z)- and (E)-9-octadecenoate, respectively).Based on these data and the results of competition experiments, two models have been proposed to describe isomerization of the octadecenoates (either direct of via an intermediate).