Related Experiment Video
Updated: Jun 12, 2025
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Rhodium/Trialkylamines Catalyzed Reductive Hydroformylation in Ionic Liquid/Heptane Medium: An Unexpected Concept for
Abdelghani El Mouat1,2, Walid Abdallah1, Jérémy Ternel1
1Univ. Artois, CNRS, Centrale Lille, Unité de Catalyse et Chimie du Solide (UCCS), Univ. Lille, UMR 8181, rue Jean Souvraz, SP 18, 62300, Lens, France.
This study developed a rhodium-catalyzed reductive hydroformylation process using an ionic liquid system. The recyclable catalyst efficiently produced primary alcohols with minimal rhodium leaching, demonstrating long-term stability in a continuous flow pilot plant.
Area of Science:
- Catalysis
- Green Chemistry
- Organic Synthesis
Background:
- Rhodium-catalyzed reactions are crucial in organic synthesis.
- Developing sustainable catalytic systems with minimal metal leaching is essential.
- Ionic liquid-based biphasic systems offer advantages for catalyst recovery and reuse.
Purpose of the Study:
- To investigate the rhodium-catalyzed reductive hydroformylation of methyl 10-undecenoate.
- To optimize reaction conditions for high primary alcohol yield and minimal rhodium leaching.
- To evaluate the recyclability and long-term stability of the catalytic system in batch and continuous flow processes.
Main Methods:
- Utilized an ionic liquid/heptane biphasic system with trialkylamines.
- Studied the effects of amine type, amount, temperature, syngas pressure, and composition.
- Transferred the optimized batch system to a miniplant for continuous flow operation.
Main Results:
- Achieved efficient catalytic system maintenance in the ionic liquid phase.
- Optimized conditions allowed for catalyst recycling at least nine times with over 50% alcohol yield.
- Limited rhodium leaching was observed throughout the process.
- Continuous flow pilot plant operated for 45.5 hours, reaching a total turnover number (TTON) of 232 for alcohol production.
Conclusions:
- The developed ionic liquid-based biphasic system is effective for rhodium-catalyzed reductive hydroformylation.
- The system demonstrates excellent recyclability and long-term stability, suitable for industrial applications.
- This approach offers a greener alternative for primary alcohol synthesis with reduced environmental impact.
More Related Videos
10:52Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
01:26Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
02:13Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
00:55Nitriles to Amines: LiAlH4 Reduction
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
01:19Acid Halides to Alcohols: LiAlH4 Reduction
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...