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Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe–Ni/Al2O3

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Abstract

The thermal cracking behavior of diethyl hexamethylenedicarbamate (EHDC) was investigated in this work. The polymers formed under different conditions were analyzed by IR and TG, indicating that the polymers were mixtures of EHDC, polyureas, imines and others. The polymers could be converted to EHDC by a simple alcoholysis reaction for the first time over Fe–Ni/Al2O3 catalysts. Under the optimized reaction conditions, the yield of EHDC could reach up to 52% with 99% selectivity over 8% Fe–3% Ni/Al2O3 catalysts. The catalysts were extensively characterized by BET, XPS, XRD, SEM, TEM, H2-TPR and NH3-TPD, showing that the interaction effect between Fe species and Ni species may be attributed to high catalytic performance of the catalyst. Meanwhile, the loss of active components resulted in decreased catalytic activity.

Graphical abstract: Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe–Ni/Al2O3

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Publication details

The article was received on 07 Jan 2019, accepted on 03 Apr 2019 and first published on 04 Apr 2019


Article type: Paper
DOI: 10.1039/C9CY00031C
Citation: Catal. Sci. Technol., 2019, Advance Article

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    Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe–Ni/Al2O3

    D. Zhou, P. Wang, Y. Long, Y. Fei and Y. Deng, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY00031C

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