A new method for heterogenization of metal complex catalysts by precipitation of its water–soluble analogue as a Gr.2 metals (Ca, Sr or Ba) salt on porous supports has been proposed. This technique yields a highly dispersed catalyst having a significantly higher activity (TOF) for hydroformylation of olefins compared to other known heterogenized catalysts. The catalyst can be recycled with ease.
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The 31P nmr signal for Ba3/2TPPTS and carbon supported Ba3/2TPPTS is observed at − 2.78 and 3.43δ. For C-II the δ value is 29.14 (doublet) for the coordinated P nuclei. The corresponding phosphine oxide appears in the same range as a part of the signal.
(a) Reaction conditions: HRhCO(PPh3)3: 2.18 × 10−3 kmol/m3, Rh:PPh3 = 1:6 (excess), 1-decene : 0.4224 kmol/m3, T: 1000C, pCO+H2(1:1): 4.14 MPa, Stirring speed : 1000 rpm, Solvent : Toluene, Total charge: 2.5 × 10−5m3, Time : 0.9 h. (b) [Rh(COD)Cl]2: 1.48 × 10−3 kmol/m3 (aq.), Rh:TPPTS = 1:6 (excess) 1-decene: 0.704 kmol/m3 (org.), T: 100 °C, Stirring speed : 1000 rpm, pCO+H2 (1:1): 4.14 MPa, Solvent : Toluene + Water (aqueous phase hold up = 0.4), Total charge : 2.5 × 10−5 m3, Time: 6.6 h.
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Pagar, N.S., Deshpande, R.M. & Chaudhari, R.V. Hydroformylation of olefins using dispersed molecular catalysts on solid supports. Catal Lett 110, 129–133 (2006). https://doi.org/10.1007/s10562-006-0095-x
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DOI: https://doi.org/10.1007/s10562-006-0095-x