Abstract
A highly dispersed cobalt catalyst for hydroformylation of 1-hexene was developed using macroporous silica (pore diameter 83.7 nm) as support. The effects of support pretreatment on the properties and catalytic activities of the obtained catalysts were investigated. The results indicated that slurry impregnation (SI) method could significantly enhance the interaction between support and cobalt precursors, leading to the formation of small cobalt particles. Moreover, this interaction would increase with the pretreating temperature or the number of hydroxyl groups in pretreating solvent. Due to the small cobalt particles and high diffusion rate of reactants and products in the macropore, the highly dispersed Co/Q-100 (PTO, SI-333) catalyst exhibited 11 times higher heptanal yield and much higher n/i ratio than the conventional Co/SiO2 (EG) catalyst which was prepared on mesoporous silica which contained similar cobalt particle size.
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Acknowledgments
This work was supported by National Natural Science Foundation of P. R. China (No. 91334206, 21606011), Ministry of Education of P. R. China (NCET-13-0653), National “863” program of P. R. China (No. 2013AA031702), Innovation and Promotion Project of Beijing University of Chemical Technology (No. JC1505), BUCT Fund for Disciplines Construction and Development (No. XK1505), and China Postdoctoral Science Foundation (2016M591051).
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Liu, Y., Li, Z., Wang, B. et al. A Fine Dispersed Cobalt Catalyst with Macro-Pore for Hydroformylation of 1-Hexene. Catal Lett 146, 2252–2260 (2016). https://doi.org/10.1007/s10562-016-1853-z
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DOI: https://doi.org/10.1007/s10562-016-1853-z