Accession Number : ADD012580

Title :   Isocyanates from Oxalyl Chloride and Amines.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Geigel,Maria A ; Marynowski,Chester W

Report Date : 25 Aug 1986

Pagination or Media Count : 22

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.

Descriptors :   *PATENT APPLICATIONS, *ISOCYANATES, *SYNTHESIS(*CHEMISTRY), AMINES, HYDROGEN CHLORIDE, SALTS, HEATING, CHLORIDES, OXYGEN COMPOUNDS, SOLVENTS, CHLOROBENZENE, NAPHTHALENES, DISTILLATION, CHEMICAL REACTORS, CHLORINATION, CHEMICAL PRECIPITATION, PYROLYSIS

Subject Categories : Industrial Chemistry and Chemical Processing
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE