PROCESS FOR THE PREPERATION OF ALIPHATIC DIISOCYANATES

摘要

The present invention relates to a process for preparing aliphatic diisocyanate, and more particularly, to a process for preparing aliphatic diisocyanate in which aliphatic dicarbamate is thermo-decomposed in the presence of a catalyst of a tin compound, and by-products having a high boiling point produced using a reaction system composed of a heat exchanger for removing a high boiling point material and a centrifuge is efficiently removed, thereby improving the yield of diisocyanate.