Preparation of highly selective and stable Cu–Mg–Fe catalyst and its catalytic performance for one-step synthesis of 2-ethylhexanol from n-butyraldehyde
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A Cu–Mg–Fe catalyst was prepared by a coprecipitation–impregnation method and some influential factors such as Cu/Fe molar ratio, Mg/Fe molar ratio, calcination temperature and reduction temperature were investigated by means of XRD, XPS, NH3(or CO2)-TPD, H2-TPR and SEM analyses. Suitable preparation conditions were obtained as follows: a Cu/Mg/Fe ratio of 1:2:1, a calcination temperature of 550 °C, and a reduction temperature of 450 °C. The Cu–Mg–Fe catalyst showed a high catalytic performance for one-step synthesis of 2-ethylhexanol from n-butyraldehyde; the yield and selectivity of 2-ethylhexanol were 68.6% and 72.4% while the overall selectivity of C8 + C4 products was greatly improved to 96.9% under suitable reaction conditions.
KeywordsCu–Mg–Fe catalyst n-Butyraldehyde Aldol condensation Hydrogenation One-step synthesis 2-Ethylhexanol
This work was supported by National Natural Science Foundation of China (Grant No. 21476058), Basic Research Program of Hebei Province for Natural Science Foundation and Key Basic Research Project (18964308D) and Natural Science Foundation of Hebei province (Grant No. B2018202220).
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