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Today: Tháng 8 22, 2017
 

Synthesis and characterization of the imidazolium ionic liquid phase catalyst containing rhodium complex on solid supports for the hydroformylation of ethylene

do-van-hungRecently, the use of ionic liquids as alternativesto organic solvents has attracted much attention of either scientific or industrial researchers. Their potential to reduce pollution in industrial processes has led to investigation of ionic liquids as alternative reaction media for a variety of applications that conventionally use organic solvents. A novel approach to immobilizing homogeneous catalysts on solid supports (supported ionic liquid phase – SILP catalyst) has been reported, in which the hydroformylation complex catalyst was distributed in ionic liquid medium contained in pore system of a solid support.

This results to an excellent stability, reusability and even improved activity of hydroformylation catalyst. Using these novel catalysts, the classical homogeneous hydroformylation becomes heterogeneous with solid catalysts in fixed bed reactors. Hydroformylation on SILP catalysts has been applied for many hydrocarbons from C3 to C8. Since 2010, SILP catalysts on SiO2 support were firstly applied for the hydroformylation of ethylene and many promising results has been obtained.

do-van-hung Illustration of supported ionic liquid phase catalyst

Therefore, the goal of the thesis was to synthesize SILP catalysts with different ionic liquid loading content on other supports (ZrO2, Al2O3, MCM-41, SBA-15) to compare with the catalysts on SiO2. These catalysts were applied for hydroformylation of ethylene. The optimized ionic liquid loading content on different supports has been found and the influence of the nature of the supports (surface area, pore size, acidity...) on the catalytic activity has been explored.
The most important results of the thesis is that the supported ionic liquid phase catalysts was successfully applied for SBA-15 at the first time and exhibited excellent actiivty for the hydroformylation of ethylene. The optimized IL content on different supports was determined.
The results of the thesis was defended successfully by Do Van Hung on December 19th , 2016, under the supervision of Associate Prof.Dr. Le Minh Thang and Associate Prof. Tran Thi Nhu Mai.
Congratulations!
The thesis can be downloaded here

[1]. S. Shylesh, D. Hanna, S. Werner and A. T. Bell, Factors influencing the activity, selectivity and stability of Rh-based supported ionic liquid phase (SILP) catalysts for hydrformylation of propene, ACS Catalysis 2 (2012) 487-493
[2]. A. Riisager, B. Jørgensen, P. Wasserscheid, R. Fehrmann, First application of supported ionic liquid phase (SILP) catalysis for continuous methanol carbonylation,  Chemical Communication 9 (2006) 994 - 996
[3]. H. P. Steinrück and P. Wasserscheid, Ionic liquids in Catalysis. Catalysis Letter 145 (2015) 380-397
[4]. Y. Diao, J. Li, L. Wang, Y. Pu , R. Yan, L. Jiang, H. Zhang and S. Zhang, Ethylene hydroformylation in imidazolium-bases ionic liquids catalyzed by rhodium-phosphine complexes, Catalysis Today 200 (2013)  54-62

 
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