Methyl N-phenyl carbamate synthesis over Zn/Al/Ce mixed oxide derived from hydrotalcite-like precursors
| Autor: | Ning Zhao, Xiaomei Chen, Ying Guo, Dajiang Tang, Hai Zhou, Min Kang |
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| Rok vydání: | 2019 |
| Předmět: |
Methylene diphenyl diisocyanate
Hydrotalcite Coprecipitation General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Cerium Aminolysis chemistry Mixed oxide 0210 nano-technology Nuclear chemistry |
| Zdroj: | RSC Advances. 9:42474-42480 |
| ISSN: | 2046-2069 |
| Popis: | Methyl N-phenyl carbamate (MPC) is an important intermediate for the green synthesis of methylene diphenyl diisocyanate (MDI) as well as many other important products. In the present work, Zn/Al/Ce mixed oxides derived from hydrotalcite-like precursors were employed as effective and recoverable heterogeneous catalyst for MPC synthesis via DMC aminolysis. Zn/Al/Ce hydrotalcite-like precursors prepared via coprecipitation method and the resulting catalysts were characterized by means of XRD, BET, SEM and XPS. Strong interactions within the Zn/Al/Ce mixed oxides were observed via the addition of appropriate amount of cerium. The mixed oxides containing 2.5% cerium showed high DMC aminolysis activity giving aniline conversion of 95.8%, MPC selectivity of 81.6% and MPC yield of 78.2%. Moreover, as a heterogeneous catalyst, it also exhibited superiorities of easy recovery and recyclable stability for MPC synthesis. |
| Databáze: | OpenAIRE |
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