PROCESS AND APPARATUS FOR PRODUCING .ALPHA.,.BETA.-UNSATURATED ACETALS

摘要

PROCESS AND APPARATUS FOR PRODUCING .alpha.,.beta.-UNSATURATED ACETALS In a process for preparing a, .alpha.,.beta.-unsaturated acetals by reacting an .alpha.,.beta.-unsaturated aldehyde with a lower alcohol in the presence of a solid catalyst in a reaction vessel, the improvement comprising introducing a reaction product leaving the reaction vessel into a distillation column at a a stage between the topmost stage to the stage located just above the lowermost stage in the distillation column, and recycling a distillate from the distillation column to the reaction vessel.