Citation: CHEN Xiu-Ying, XIE Hui-Lin, HU Wen-Bin, ZHOU Xin-Hua, ZHOU Hong-Jun, SHU Xu-Gang, SUN Yu-Qing. Preparation of Pt-Al/MCM-41 Catalyst for Synthesis of Organosilicon Synergist[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(5): 933-941. doi: 10.11862/CJIC.2018.114 shu

Preparation of Pt-Al/MCM-41 Catalyst for Synthesis of Organosilicon Synergist

1.
Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
2.
Huizhou Green Dragon Biological Materials Co., Ltd., Huizhou, Guangdong 516018, China

Corresponding author: HU Wen-Bin, wbhu2000@163.com ZHOU Hong-Jun, hongjunzhou@163.com
Received Date: 24 December 2017
Revised Date: 1 March 2018

Figures(12)

The supported Pt-Al/MCM-41 catalyst was prepared by using mesoporous silica MCM-41 as the carrier and AlCl₃ as the accelerator. The structure, morphology of catalyst and intermetallic force were systematically characterized by fourier transform infrared spectroscopy (FTIR), N₂ adsorption-desorption, X-ray diffraction assay (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma (ICP). The effects of various amount of Al on the structure of the catalyst and the intermetallic force were discussed, and the catalytic application in hydrosilylation of allyl polyether (PGAE) and heptamethyltrisiloxane (MD^HM) was investigated. The results show that the dosage of Al had a certain effect on the structure and ordering degree of the catalyst, and the specific surface area, pore volume and order degree decrease with the increase of Al content. Besides, addition of a certain amount of Al is beneficial to improve the dispersion and decreases size of platinum particle. Pt₁Al₂/MCM-41 has excellent reusability, which could be reused six times without significant loss of activity and the conversion of MD^HM is above 90%, The synergist was synthesized with n_PGAE/n_MD^HM=1.1 in the presence of 0.5% catalyst at 100℃ for 4 h.
- MCM-41,
- catalyst,
- aluminum chloride,
- organosilicon synergist
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