METHOD FOR SEPARATING A LIQUID CRUDE ALDEHYDE MIXTURE BY DISTILLATION

摘要

The present invention relates to a method for separating a liquid crude aldehyde mixture by distillation. Said mixture contains unbranched and branched aldehydes. In a first distillation column, the produ ct mixture is separated into a first product flow of branched aldehyde, a product flow of unbranched aldehyde and an additional product fl ow which contains unbranched aldehyde and the high-boiling components. In a second distillation column whose product flow is smaller by a factor of 50 to 200 than the product flow from the first distillation column, the additional product flow is then separated into a product flow of unbranched aldehyde and a high-boiling product flow.