| 摘要 |
<p>A process for the continuous and automatic separation of toluene diisocyanate, without decomposition, from distillation residues comprising evaporating toluene diisocyanate in an agitated, scraped evaporator, under a vacuum of about 1 mm Hg to about 50 mm Hg and at a temperature of about 210 DEG C. to about 250 DEG C., with a minimum residence time, preferably about 15 minutes, in an evaporator, and continuously extracting the remaining components of the residue.</p> |
