Abstract
The concentration of rhodium in solution over polymer-bonded hydroformylation catalysts was measured, and the factors influencing that concentration were identified. Rhodium dissolution exhibited an equilibrium behavior which' decreased with increasing temperature or hydrogen pressure and with decreasing CO pressure. Solvent effects were particularly pronounced with amine resins and the sequential reaction, olefin-aldehyde-alcohol, led to significant redistribution of rhodium within a reactor bed. The implications of these effects in catalysis are noted.
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