Effective Synthesis of m -Xylylene Dicarbamate via Carbonylation of m -Xylylene Diamine with Ethyl Carbamate over Hierarchical TS-1 Catalysts.
In: ACS omega, Jg. 7 (2022-06-28), Heft 27, S. 23851-23857
Online
academicJournal
Zugriff:
Carbonylation of m -xylylene diamine (XDA) with ethyl carbamate to produce m -xylylene dicarbamate (XDC), which is the crucial intermediate for the production of m -xylylene diisocyanate (XDI), over the hierarchical TS-1 (HTS-1) zeolite catalyst was studied. The catalysts were characterized by Brunauer-Emmett-Teller, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and temperature-programed desorption of ammonia techniques systematically. The results showed that the high performance of HTS-1 could be attributed to the weak acidity and high V meso / V total ratio of the catalyst. Impacts of reaction time and reusage on the HTS-1 catalyst were also investigated. Under 6 h and 200 °C, XDA conversion could reach 100% with 88.5% XDC yield. Furthermore, partial loss of Ti active sites with Lewis acidity on the catalyst surface led to the decrease of XDC yield during recycling. Moreover, a possible reaction mechanism for the title reaction was primarily proposed.
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)
| Titel: |
Effective Synthesis of m -Xylylene Dicarbamate via Carbonylation of m -Xylylene Diamine with Ethyl Carbamate over Hierarchical TS-1 Catalysts.
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| Autor/in / Beteiligte Person: | Cao, J ; Zhou, J ; Wang, L ; Cao, Y |
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| Zeitschrift: | ACS omega, Jg. 7 (2022-06-28), Heft 27, S. 23851-23857 |
| Veröffentlichung: | Washington, D.C. : American Chemical Society, [2016]-, 2022 |
| Medientyp: | academicJournal |
| ISSN: | 2470-1343 (electronic) |
| DOI: | 10.1021/acsomega.2c02535 |
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