Oxidative coupling of carboxylic acids or benzaldehydes with DMF using hydrotalicite-derived oxide catalysts
| Autor: | Srinivas Theegala, Akhil V. Nakhate, Suresh K. Bhargava, Lakshmi Kantam Mannepalli, Shyam Sunder R. Gupta, Gunjan P. Deshmukh, Priya S. Samudrala, Chandrakanth Gadipelly, Kalidas B. Rasal, V.R. Chary Komandur, Deepa K. Dumbre, Selvakannan Periasamy |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Process Chemistry and Technology Carboxylic acid Oxide 010402 general chemistry Heterogeneous catalysis 01 natural sciences Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Dimethylformamide Calcination Oxidative coupling of methane General Environmental Science Benzoic acid Nuclear chemistry |
| Zdroj: | Applied Catalysis B: Environmental. 240:348-357 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2017.12.058 |
| Popis: | Hydrotalcite-derived (HT-derived) oxide catalysts were synthesised from hydrotalcite-like (HT-like) materials prepared by co-precipitation method (Cu-Al, Cu-Fe, Mg-Al, Mg-Fe, Ni-Fe and Ni-Al) followed by calcination and their catalytic activity was studied for oxidative amidation of carboxylic acids and substituted benzaldehydes with N,N-dimethylformamide (DMF). Catalyst screening was done using benzoic acid and DMF as a model reaction. Subsequently, we have optimised the reaction with different reaction parameters, catalyst loading, temperatures and oxidants. Cu-Fe HT-derived oxide catalyst showed excellent activity towards oxidative amidation using TBHP as an oxidant at 80 °C in 10 h. The fresh and spent catalysts were thoroughly characterised by different analytical techniques; XRD, SEM, HRTEM, TPD, N2 adsorption-desorption isotherm and XPS. Moreover, the catalyst was easily separated by simple filtration and reused up to four cycles without significant loss in catalytic activity. |
| Databáze: | OpenAIRE |
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