| abstract |
The invention relates to a method for the production of ketals and optionally enol ethers, wherein a) an alkyne and/or allene is reacted with an alcohol in a gaseous phase on a catalyst containing zinc oxide and/or cadmium oxide in order to obtain a reaction mixture which contains non-reacted alcohol, an enol ether and a ketal, b) optionally, a fraction is removed by distillation from the reaction mixture, containing the non-reacted alcohol and at least one part of the enol ether, and c) subjecting the reaction mixture from step a) or the fraction from step b), optionally adding an additional alcohol, and post-reacting in the liquid phase in the presence of an acidic catalyst. |