Hydroaminomethylation of methyl 10-undecenoate with integrated catalyst recycling via a thermomorphic multiphase system for the continuous production of renewable amines
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Key Highlights:
- Continuous operation in a miniplant for over 90 hours, showcasing stable selectivity towards the desired amine product at 80%.
- Integration of TMS with an OSN membrane for continuous separation of by-product water, crucial for achieving outstanding results.
- Maintenance of water concentration below 4% in the recycle stream, resulting in minimal undesired aldol condensate formation (only 3% after 90 hours).
- Remarkably low catalyst leaching: only 2.5% loss of rhodium and 0.4% loss of SulfoXantphos ligand over 90 hours of continuous operation.
- Minimal loss of rhodium via TMS and OSN, with a mere 6 ppm per produced desired amine product.