Isocyanates from Oxalyl Chloride and Amines.

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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.

Author(s):
Geigel, Maria A. ; Marynowski, Chester W.
Author Organization(s):
DEPARTMENT OF THE ARMY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0022

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: This Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-900 063
 Subject Terms
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
*PATENT APPLICATIONS, *ISOCYANATES, *SYNTHESIS(*CHEMISTRY), AMINES, HYDROGEN CHLORIDE, SALTS, HEATING, CHLORIDES, OXYGEN COMPOUNDS, SOLVENTS, CHLOROBENZENE, NAPHTHALENES, DISTILLATION, CHEMICAL REACTORS, CHLORINATION, CHEMICAL PRECIPITATION, PYROLYSIS
Field(s)/Group(s):
Industrial Chemistry and Chemical Processing, Organic Chemistry
Report Date:
1986 Aug 25