This review describes the development
of supported ionic liquid
phase (SILP) materials as novel hydroformylation catalysts. Ligand-modified
rhodium catalysts can be immobilized in a thin film of ionic liquid,
which itself is dispersed on a porous material. The solid SILP catalysts
have been improved with respect to activity, selectivity, and stability.
In addition, their applicability in continuous gas-phase processes
opens new opportunities for improved chemical production routes.