Polymer Encapsulated Cobalt-Based Catalysts (Co EnCatTM ) for Selective Continuous Hydrogenation of 1-Iodo-4-nitrobenzene
| Autor: | Tanmay Godiawala, Patrick Loos, Jorma Hassfeld, Hannes Alex, John Barry, Norbert Steinfeldt, Todor Baramov |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Organic Chemistry Inorganic chemistry Alloy chemistry.chemical_element Polymer engineering.material 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences Inorganic Chemistry Nitrobenzene chemistry.chemical_compound chemistry Yield (chemistry) engineering Physical and Theoretical Chemistry Selectivity Cobalt Polyurea |
| Zdroj: | ChemCatChem. 9:3210-3217 |
| ISSN: | 1867-3880 |
| DOI: | 10.1002/cctc.201700391 |
| Popis: | New cobalt catalysts confined in an EnCatTM polyurea matrix by micro-encapsulation of Al5Co2 or Al5Co2/Al3Ni2 phase containing alloys are disclosed for the reductive hydrogenation of 1-iodo-4-nitrobenzene 1. The product 4-iodo-aniline 2 readily undergoes hydro-desiodination and was used to demonstrate the extraordinary selectivity. Co EnCatTM significantly suppressed this follow-up reaction under both batch and flow modes. The correlation between performance, elemental composition, and alloy content is presented for these novel catalysts. Among them, the hybrid micro-encapsulated Co-Ni catalyst showed higher activity than its Ni-free analogue. In the flow process, this catalyst gave a high yield of 2 and very low level of 3. Hence, these novel Co EnCatTM catalysts hold promise with respect to the continuous-flow hydrogenation of challenging halogenated nitroaromatic compounds. |
| Databáze: | OpenAIRE |
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