Accession Number:

ADD012580

Title:

Isocyanates from Oxalyl Chloride and Amines.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON DC

Report Date:

1986-08-25

Pagination or Media Count:

22.0

Abstract:

The process of this invention for preparing isocyanates is a one-step process comprising heating an amine or an amine hydrochloride salt with excess oxalyl chloride OxCl in a high boiling point solvent from about 80 C-180 C for a reaction time of about 0.5-2 hours. An appropriate high boiling point solvent is selected from o-dichlorobenzene DCB and decahydronaphthalene Decalin. After forming the isocyanate, the excess oxalyl chloride and solvent are removed and the isocyanate is separated and purified by distillation.

Subject Categories:

  • Industrial Chemistry and Chemical Processing
  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE