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Efficient synthesis of acetic acid via Rh catalyzed methanol hydrocarboxylation with CO2 and H2 under milder conditions.
- Source :
-
Green Chemistry . 8/7/2017, Vol. 19 Issue 15, p3558-3565. 8p. - Publication Year :
- 2017
-
Abstract
- Acetic acid is an important bulk chemical and synthesis of acetic acid via methanol hydrocarboxylation with CO2 and H2 is a very promising route. In this work, we studied the reaction over a number of catalytic systems. It was found that Rh2(CO)4Cl2 with 4-methylimidazole (4-MI) as the ligand was very efficient in the presence of LiCl and LiI. Acetic acid began to form at 150 °C. The TOF was as high as 26.2 h−1 and the yield of acetic acid could reach 81.8% at 180 °C. The catalytic system had obvious advantages, such as simplicity, high activity and selectivity, milder reaction conditions, and less corrosiveness. The excellent cooperation of CO and Cl− in Rh2(CO)4Cl2, suitable basicity and aromaticity of the ligand 4-MI, and the hydrogen bonding ability of Cl− were crucial for the outstanding performance of the catalytic system. The control experiments showed that the reaction did not proceed via the CO pathway. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ACETIC acid
*METHANOL
*LIGANDS (Chemistry)
*CATALYSTS
*AROMATICITY
*HYDROGEN bonding
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 19
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 124405976
- Full Text :
- https://doi.org/10.1039/c7gc01391d