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Updated: May 15, 2026
09:37
Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Catalyst recycling via specific non-covalent adsorption on modified silicas
Alexander M Kluwer1, Chretien Simons, Quinten Knijnenburg
1InCatT B.V. Science Park 904, 1098 XH Amsterdam, The Netherlands. sander.kluwer@incatt.nl
Dalton Transactions (Cambridge, England : 2003)
|January 8, 2013
Summary
This study introduces a novel method for recycling homogeneous hydroformylation catalysts using selective adsorption onto supports. This approach enables catalyst recovery and reuse, achieving high stability and turnover numbers.
Area of Science:
- Catalysis
- Materials Science
- Supramolecular Chemistry
Background:
- Homogeneous hydroformylation catalysts offer high selectivity and activity but suffer from difficult separation and recycling.
- Developing efficient catalyst recycling strategies is crucial for sustainable chemical processes.
Purpose of the Study:
- To present a new strategy for recycling homogeneous hydroformylation catalysts.
- To utilize selective adsorption onto tailor-made supports for catalyst separation and recovery.
- To enable repeated batch reactions with the recycled catalyst.
Main Methods:
- Modification of a bidentate ligand (NixantPhos) with a pyridine group for supramolecular interaction.
- Preparation of a rhodium pre-catalyst incorporating the modified ligand.
- Testing catalyst performance and recyclability using various supports, including end-capped silica-alumina.
- Employing solvent exchange for catalyst release and subsequent reuse.
Main Results:
- The rhodium-NixantPhos catalyst demonstrated high selectivity, activity, and stability.
- A remarkable turnover number (TON) of 170,000 was achieved in a single run.
- End-capped silica-alumina showed the best performance for ligand adsorption.
- Four successful recycling runs were demonstrated, indicating the viability of the method.
Conclusions:
- The developed strategy effectively enables the recycling of homogeneous hydroformylation catalysts.
- Selective supramolecular interactions provide a robust mechanism for catalyst separation and recovery.
- This approach holds promise for more sustainable and cost-effective hydroformylation processes.
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