Process for the production of monoisocyanate

Details Process for the production of monoisocyanate Process for the production of monoisocyanate

C - Chemistry, Metallurgy

07

C

260/456.5

C07C 119/042 (1980.01)

Patent

CA 1089483

PROCESS FOR THE PRODUCTION OF MONOISOCYANATE ABSTRACT OF THE INVENTION This invention relates to an improved process for the production of aliphatic relatively low boiling monoiso- cyanates from the corresponding carbamic acid chlorides, comprising adding an at least equivalent quantity, based on the hydrogen chloride bound in the carbamic acid chloride, of a relatively high boiling organic monoisocyanate or poly- isocyanate whose boiling point is higher than the boiling point of the relatively low boiling monoisocyanate to be pro- duced, to the carbamic acid chloride, optionally dissolved in inert organic solvents and then distilling off the relatively low boiling monoisocyanate by heating and/or applying a vacuum, or by means of an inert gas stream.

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