PREPARATION METHOD OF DITRIMETHYLOLPROPANE BY CONTROL OF AMOUNT OF ORGANIC SOLVENT, CRYSTALLIZATION TEMPERATURE AND CRYSTALLIZATION TIME TO IMPROVE PURITY

PURPOSE: A method for preparing ditrimethylolpropane is provided, to obtain ditrimethylolpropane with a high purity through only crystallization by controlling the amount of an organic solvent, a crystallization temperature and a crystallization time. CONSTITUTION: The method comprises the steps of...

Full description

Saved in:
Bibliographic Details
Main Authors IWAMOTO, ATSUSHI, KUZUHARA, IKUTARO
Format Patent
LanguageEnglish
Korean
Published 20.12.2004
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
Online AccessGet full text

Cover

More Information
Summary:PURPOSE: A method for preparing ditrimethylolpropane is provided, to obtain ditrimethylolpropane with a high purity through only crystallization by controlling the amount of an organic solvent, a crystallization temperature and a crystallization time. CONSTITUTION: The method comprises the steps of reacting n-butyl aldehyde and formaldehyde in the presence of a basic catalyst to prepare a product solution; extracting the product solution with an organic extractor to obtain an extract; distilling the extract to separate trimethylolpropane and to obtain a distillation residue; and adding 0.6-10 times weight of an organic solvent to the distillation residue, and treating the obtained solution at a crystallization temperature Y (deg.C) for 0.1-20 hours to crystallize ditrimethylolpropane represented by the formula 1, wherein Y satisfies the relation represented by (30xln(X) - 92) <=Y<=55 (wherein X is the wt% of ditrimethylolpropane in the distillation residue before an organic solvent is added). Preferably the organic solvent is at least one kind of solvent selected from the group consisting of an aliphatic ketone and an aliphatic ester.
Bibliography:Application Number: KR20040043095