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所属单位：化学工程学院

发表刊物：Reaction Kinetics, Mechanisms and Catalysis

项目来源：自选课题

摘要：The application of metal modified fluorapatite (metal-FAP, MCa9(PO4)6F2, M = Ca, Co, Ni, Cu, Zn) as highly efficient catalysts for the synthesis of an important intermediate methyl N-phenyl carbamate (MPC) for non-phosgene isocyanate production, from urea, methanol and aniline is reported firstly. The catalysts metal-FAP powders were synthesized by co-precipitation method and their properties were identified by ICP-AES, XRD, BET, TEM, EDS and NH3-TPD. Zn modified fluorapatite (ZnCa9(PO4)6F2, ZnFAP) with the strongest acidity among the metal-FAP (metal = Ca, Co, Ni, Cu, Zn) catalysts exhibited the highest catalytic activity to MPC formation. The effects of reaction temperature, time, molar ratio of raw materials, dosage of catalyst and reusability of the catalyst on the process were investigated. The optimal reaction parameters were determined as follows: aniline 20 mmol, the molar ratio urea/aniline 5:1, the molar ratio of methanol to aniline 20:1, ZnFAP 8.0 mmol, 6 h, 180 °C, with 94.4% aniline conversion and 75.8% selectivity to methyl N-phenyl carbamate. ZnFAP catalyst showed little catalytic activity loss after five times repeated use. The reaction mechanism is proposed and discussed.

合写作者：杜文桥,张月华,王爱祎

第一作者：王巍

论文类型：期刊论文

卷号：125

页面范围：1

ISSN号：1878-5190

是否译文：否

发表时间：2018-07-06