METHOD OF PRODUCING GLUTARIC ALDEHYDE Russian patent published in 2013 - IPC C07C45/60 C07C47/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a novel method of producing glutaric aldehyde. The method involves reaction, in a vessel at temperature of 80-120°C, of a reaction mixture containing an alkoxy dihydropyran derivative of formula I wherein R denotes a C₁-C₂ alkyl, water and an acid catalyst to obtain glutaric aldehyde and an alcohol, corresponding to the alkoxy group of alkoxy dihydropyran. Further, a distillation column is used to remove, from the reaction mixture, a distillate containing alcohol and unreacted alkoxy dihydropyran, followed by contacting the distillate with a heterogeneous catalyst lying outside the distillation column such that at least a portion of alkoxy dihydropyran reacts and returning at least a portion of the distillate into the distillation column.

EFFECT: method increases output of glutaric aldehyde.

8 cl, 3 dwg, 1 tbl