Production of cyclic acetals or ketals using solid acid catalysts

摘要: A process for making a cyclic compounds such as acetal or ketones by feeding aldehyde ketone and polyhydroxyl to reaction zone at molar ratio of least 3:1, reacting these in the presence solid acid an acidic ion exchange resin, generate liquid mixture without separating water from it is being formed mixture, withdrawing product stream, stream distillation column separate unreacted compounds, optionally recycling back zone. The produces yields 90% with long catalyst life. also suitable make ketals compounds.