METHOD FOR RECOVERING DITRIMETHYLOLPROPANE

摘要

PROBLEM TO BE SOLVED: To recover highly pure ditrimethylolpropane from distillation residues, 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 removing components having higher boiling points than that of ditrimethylolpropane from the distillation residues and then crystallizing ditrimethylolpropane.