CuO-CoO-MnO/SiO_2 nanocomposite aerogels as catalysts carrier and effect of process factors on the synthesis of diphenyl carbonate

摘要

CuO-CoO-MnO/SiO_2 nanocomposite aerogels were prepared by using tetraethyl orthosilicate (TEOS) as Si source, and aqueous solution of Cu, Co and Mn acetates as the precursors via sol-gel process and ethanol supercritical drying technique. Supported catalysts were prepared by using CuO-CoO-MnO/SiO_2 nanocomposite aerogels as the catalysts carriers, and they were used in the synthesis of diphenyl carbonate (DPC) by using phenol, CO and O_2 as raw materials. The effect of process factors such as reaction temperature, reaction time and reaction pressure on the synthesis of DPC was investigated, and the catalytic efficiency of catalysts supported by the nanocomposite aerogels in the synthesis of DPC was evaluated by gas chromatography. The results showed that the optimal reaction temperature for the synthesis of DPC was 100°C, the pressure was 6.0 MPa, and the reaction time was 6 h. The yield of DPC was up to 27.14% under the catalysis of the supported catalyst.