Fifteen Years of Supported Ionic Liquid Phase-Catalyzed Hydroformylation: Material and Process Developments

Abstract

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.

Using nature’s blueprint to expand catalysis with Earth-abundant metals

“…(127) The solution environment can also be used to favor mechanisms for dynamic selfrepair of catalysts; for example, Co ions in solution promote dynamic stability and self-repair of Co-based oxygen evolution catalysts that would otherwise undergo corrosion. (128) Additionally, thin gas-permeable layers of ionic liquids (129) and/or molecular promoters could create unique microenvironments that contain substrate binding units proximate to active sites. This strategy enhances the stability of EAMs prone to irreversible reconstruction/oxidation, and may also foster improved selectivity.…”

Capturing spatially resolved kinetic data and coking of Ga–Pt supported catalytically active liquid metal solutions during propane dehydrogenationin situ

“…12 Application of classical SLP catalysts with organic liquids, ionic liquids, or molten salts as liquid phase on porous supports are typically restricted to relatively low temperature applications (≤300 °C) due to the limited thermal stability of the applied liquid phases. [13][14][15][16] Conversely, SCALMS employ liquid metals allowing for high temperature applications, because virtually no decomposition may occur for a solution of elementary metals. [10][11][12] While other concepts for catalysis over liquid metals require large volumes of liquid metal in a reactor, 17,18 SCALMS materials are composed of dispersed supported droplets of a liquid alloy consisting of a catalytically active metal and an excess of a low melting point metal, e.g.…”

Heterogeneous Catalysis with the Participation of Ionic Liquids

“…In the literature, many examples can be found on the catalytic application of the above systems; however, the vast majority of them concern the reaction of hydroformylation. The development of SILP systems applied in the reaction, as well as the development of the process itself within the last fifteen years, has been presented in the publication by Marinkovic et al [60]. The studies carried out during the recent decades enabled the determination of conditions for conducting respective hydroformylation reactions in the liquid and gas phases, which in turn, made it possible to choose a SILP material for specific reaction conditions.…”

“…by Marinkovic et al [60]. The studies carried out during the recent decades enabled the determination of conditions for conducting respective hydroformylation reactions in the liquid and gas phases, which in turn, made it possible to choose a SILP material for specific reaction conditions.…”