Manufacture of aliphatic or cycloaliphatic isocyanates

Details Manufacture of aliphatic or cycloaliphatic isocyanates Manufacture of aliphatic or cycloaliphatic isocyanates

1978-01-05

1979-07-24

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C11800

Patent

active

041622634

ABSTRACT:
Aliphatic and cycloaliphatic isocyanates are manufactured by thermal decomposition of aliphatic or cycloaliphatic carbamic acid chlorides in the presence of an inert organic solvent of lower boiling point than that of the isocyanate formed. The decomposition is carried out in a reaction vessel surmounted by a rectifying unit, which in turn is surmounted by a reflux condenser, the isocyanate formed being condensed in the rectifying unit at a temperature above the boiling point of the solvent.

REFERENCES:
patent: 3388145 (1968-06-01), Merz
patent: 3969389 (1976-07-01), Urbach et al.
patent: 3991094 (1976-11-01), Zanker
patent: 4082787 (1978-04-01), Bassett et al.

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