Zhang Jinfeng, Gao Yan, Zhang Jiyao, Zhao Jianshe, Shen Hanxi
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069, Shaanxi, China.
Shaanxi Key Laboratory of Petroleum for Fine Chemicals, Shaanxi Provincial Research and Design Institute of Petroleum and Chemical Industry, Xi'an, 710054, Shaanxi, China.
Chem Cent J. 2018 Oct 20;12(1):104. doi: 10.1186/s13065-018-0474-6.
A series of TiO-VO-MCM-41 molecular sieve catalysts were prepared by the impregnation method. The prepared catalysts were characterized by different techniques including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and N adsorption-desorption. These catalysts were applied in the catalytic synthesis of diphenyl carbonate (DPC) by the transesterification of dimethyl carbonate (DMC) with phenol. The synthesis results indicated that the catalysts possessed the high specific surface area and large pore volume and included titanium with four ligands. Due to the vanadium introduction into Ti-MCM-41, the catalytic activity was promoted, by-products were reduced, and the catalytic activity and stability of the catalyst were significantly improved. With 10%V-20%Ti-MCM-41 catalyst, the optimal synthesis results including the conversion rate of DMC of 33.88%, the selectivity of DPC of 35.84%, and the yield of DPC of 12.14% were obtained.
采用浸渍法制备了一系列TiO-VO-MCM-41分子筛催化剂。通过X射线衍射、傅里叶变换红外光谱、X射线光电子能谱和N吸附-脱附等不同技术对制备的催化剂进行了表征。将这些催化剂应用于碳酸二甲酯（DMC）与苯酚酯交换反应催化合成碳酸二苯酯（DPC）。合成结果表明，催化剂具有高比表面积和大孔容，且含四配位钛。由于钒引入Ti-MCM-41中，催化活性得到提高，副产物减少，催化剂的催化活性和稳定性显著改善。使用10%V-20%Ti-MCM-41催化剂时，获得了最佳合成结果，包括DMC转化率为33.88%、DPC选择性为35.84%、DPC产率为12.14%。
