Isobutyl alcohol is prepared by the catalytic hydrogenation of a mixture of CO2, MeOH, and O-containing organic compounds and fractionating the product. Thus, a mixture of CO2, MeOH, and O2 is hydrogenated under pressure by the aid of a contact mass of Cr, Mo, or W. The product is dissolved in alkali to remove unchanged MeOH. The rest of the MeOH is removed by adding HCOOH and distilling off the HCOOMe. The fraction of the distillate at 80°-125° is 75% isobutyl alcohol. Gives other examples.