Journal of the American Oil Chemists Society

, Volume 32, Issue 7, pp 400-405

First online:

Isomerization during hydrogenation. I. Oleic acid

  • Robert R. AllenAffiliated withResearch Division, Armour and Company
  • , Arthur A. KiessAffiliated withResearch Division, Armour and Company

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It was found that during the hydrogenation of octadecenoic acids, migration of the double bonds takes place equally in each direction. The positional isomers that are formed are composed of the 1∶2 equilibrium mixture ofcis andtrans. A partial hydrogenation-dehydrogenation theory may be applied to explain the simultaneous formation of both positional and geometrical isomers.