METHOD FOR RECOVERING DITRIMETHYLOLPROPANE

摘要

PROBLEM TO BE SOLVED: To recover highly pure ditrimethylolpropane from distillation residues in a high yield, after trimethylolpropane is distilled and recovered from a reaction solution in a method for producing trimethylolpropane by the reaction of normal butyl aldehyde with formaldehyde in the presence of a basic catalyst. SOLUTION: This method for recovering ditrimethylolpropane comprises adding an acid and an agent for collecting decomposition products to the distillation residues to decompose formal compounds and then recovering ditrimethylolpropane.