Process for the continuous production of mono- and polyisocyanat

Details Process for the continuous production of mono- and polyisocyanat Process for the continuous production of mono- and polyisocyanat

1988-10-27

1989-07-25

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C07C 7100

Patent

active

048515701

ABSTRACT:
This invention relates to a process for the continuous production of an organic monoisocyanate or polyisocyanate in a single stage reaction. A reaction mixture is formed by continuously mixing, at a temperature elevated above room temperature but not exceeding about 150.degree. C., a solution in a substantially inert organic solvent of a monoamine or polyamine corresponding to the monoisocyanate or polyisocyanate and a solution in a substantially inert organic solvent of phosgene. The reaction mixture is continuously passed upwards from below through a reaction column comprising at least 10 separate chambers separated by perforated plates, wherein each perforation of said perforated plates has a diameter of less than about 20 mm.

REFERENCES:
patent: 3781320 (1973-12-01), Irwin
patent: 3829458 (1974-08-01), Horn et al.

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