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Conclusion
Hydroformylation of higher olefins using rhodium-sulfo-
xanthphos water soluble catalyst in a aqueous biphasic medium
has been studied to show that NMP as a co-solvent increases
the rates significantly. Importantly the high regioselectivity
towards linear aldehydes was retained with this unique complex
catalyst. The rate enhancement is more prominent for 1-decene
and 1-dodecene hydroformylation. The water:NMP ratio of
7:3 was found to be the optimum ratio to ensure high activity.
ICP analysis showed negligible leaching of rhodium to organic
phase indicates the true biphasic nature of the reactions. The
aqueous catalyst phase was recycled several times with an inter-
esting observation of increased activity during first recycle.
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