Hydroformylation of mixed octenes over immobilized Co-Ph₃PO/PDMS/SiO₂ catalyst

ISSN： 1011-372X

Source： Catalysis Letters, Vol.115, Iss.1-2, 2007-05, pp. : 19-22

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Abstract

The catalyst Co-Ph₃PO/PDMS/SiO₂, Co-Ph₃PO complex immobilized on polydimethylsiloxane (PDMS) functionalized SiO₂, was prepared by sol-gel method. The characterizations of the catalysts were made by FT-IR, ICP-AES and N₂ adsorption/desorption. The BET surface area, pore diameter and pore volume of the catalyst Co-Ph₃PO/PDMS/SiO₂ were smaller than that of pure SiO₂ · ICP-AES showed that the content of cobalt of Co-Ph₃PO/SiO₂ was almost the same as that of Co-Ph₃PO/PDMS/SiO₂. The conversion of mixed octenes catalyzed by Co-Ph₃PO/PDMS/SiO₂was 24.6 % (cobalt leaching was only 0.014% after the first run), which was two times about that of Co-Ph₃PO/SiO₂ (the conversion was only 11.6 , 25% cobalt leaching was observed after the first run). The immobilized catalyst Co-Ph₃PO/PDMS/SiO₂ could be reused six times without reducing the activity and selectivity.