Hydroformylation of 1-hexene with a cobalt catalyst in ionic liquids: A new efficient approach for generation and recycling of the catalyst

Hydroformyktion of 1-hexene with a Cobalt Catalyst in Ionic Liquids: a New Efficient Approach for Generation and Recycling of the Catalyst - Hydroformylation of olefins has been performed with a system based on cobalt and pyridine ligands in non-aqueous ionic liquids. In this work, a new approach was developed to recycle the cobalt catalyst without the use of chemicals. For 1-hexene, activity of the "[Co-2(CO)(8)/Pyridine(2 eq)/[BMIM][NTf2]" at 100 bar and 130 degrees C can reach 110 h(-1) with a selectivity for aldehydes of up to 87% (linear to branched ratio being around 1.8). The recycling of the ionic liquid phase was performed several times without loss of activity or selectivity.