PROCESS FOR OBTAINING 2-ALKYL-BRANCHED ALKANALS FROM ALKANAL MIXTURES

摘要

2-Alkyl-branched alkanals are obtained from mixtures which contain the 2-alkyl-branched alkanals besides n-alkanals, 3-alkylalkanals and/or other isomers, by… a) reacting the alkanal mixture with an aqueous formaldehyde solution in the presence of a secondary amine and of a carboxylic acid as catalyst,… b) separating off the aqueous phase with the catalyst and, where appropriate, unreacted excess formaldehyde, and… c) separating off the 2-alkyl-branched alkanals by distillation from the condensation products of the other alkanals with formaldehyde.