Process for methyl isocyanate production

Details Process for methyl isocyanate production Process for methyl isocyanate production

1982-04-19

1983-07-05

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

564 73, C07C11800

Patent

active

043917585

ABSTRACT:
An improved process for the preparation of methyl isocyanate comprising reacting methyl carbamoyl chloride with an acid acceptor selected from the group consisting of 1,3-dimethylurea, urea, alkyl ureas and biuret in an organic solvent in which the acid acceptor is soluble but in which the hydrochloride salt thereof is insoluble, separating the acid acceptor hydrochloride from the liquid phase, recovering methyl isocyanate by distillation from the liquid phase, and thermally decomposing acid acceptor hydrochloride to at least a partially free acid acceptor which can preferably be used as a starting material for the production of methyl isocyanate.

REFERENCES:
patent: 3440268 (1969-04-01), Stamm
patent: 3644461 (1972-02-01), Rennells
patent: 3852317 (1974-12-01), Zanker
patent: 3860623 (1975-01-01), Zanker et al.
patent: 4146550 (1979-03-01), Reichmann et al.

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