Direct Synthesis of Triethoxysilane Catalyzed by Nano CuCl
WANG Chenwen1, CHONG Mingben2, CHENG Dangguo1,2, CHEN Fengqiu1,2
1. College of Chemical and Biological Engineering at Zhejiang University, Hangzhou 310058, China;
2. Institute of Zhejiang University-Quzhou, Quzhou 324000, China
Abstract：In order to develop efficient catalysts and explore the reaction mechanism for the direct synthesis of trialkoxysilanes. nano-cuprous chloride catalysts were prepared by hydrothermal synthesis method and used to catalyze direct synthesis of triethoxysilane from ethanol and silicon powder. Influence of silicon powder size, reaction time, pretreatment temperature and time of the powder and catalyst mixture on conversion of silicon powder and selectivity of triethoxysilane was investigated. The results showed that the best reaction performance was achieved when the size of silicon powder was 0.074 mm (200 mesh), the reaction time was 2 h, the pretreatment temperature and time of silicon and copper were 260 ℃ and 8 h respectively. At this condition, the conversion of silicon powder was 93.6% and the selectivity of triethoxysilane was 99.6%. Moreover, the intrinsic mechanism of catalyst preactivation and deactivation during reaction was discussed by combining characterization results such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS).
WANG Chenwen,CHONG Mingben,CHENG Dangguo et al. Direct Synthesis of Triethoxysilane Catalyzed by Nano CuCl[J]. Chemical Reaction Engineering and Technology, 2023, 39(3): 193-200.
