Highly Selective Hydrogenation of CO into C Alcohols by Homogeneous Catalysis
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The hydrogenation of CO to produce alcohols with two or more carbons (C alcohols) is of great importance, but is challenging. In this work, we found that a Ru(CO)/Rh(CO)Cl-LiI system could catalyze the reaction effectively in 1,3-dimethyl-2-imidazolidinone (DMI) under mild conditions. Methanol, ethanol, propanol, 2-methyl propanol, butanol, and 2-methyl butanol were produced in the homogeneous catalytic reaction. The C alcohols could be generated at 160 °C, which is the lowest temperature reported so far for producing C alcohols CO hydrogenation. The selectivity for the C alcohols could be as high as 96.4% at the optimized conditions, which is higher than those reported in the literature. In addition, the catalytic system could be easily recycled. The route of the reaction for forming the C alcohols was discussed on the basis of control experiments.
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