Process for the production of monoisocyanate

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

1977-08-26

1980-11-04

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453PH, C07C11800

Patent

active

042319528

ABSTRACT:
This invention relates to an improved process for the production of aliphatic relatively low boiling monoisocyanates 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 polyisocyanate whose boiling point is higher than the boiling point of the relatively low boiling monoisocyanate to be produced, 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.

REFERENCES:
patent: 3440268 (1969-04-01), Stamm
patent: 3644461 (1972-02-01), Hennells
patent: 3694323 (1972-09-01), Cooper et al.
patent: 3969389 (1976-07-01), Urbach et al.
patent: 4069238 (1978-01-01), Zanker

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