Process for the preparation of isocyanates by thermal cleaving o

Details Process for the preparation of isocyanates by thermal cleaving o Process for the preparation of isocyanates by thermal cleaving o

1982-10-25

1984-11-13

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C11800

Patent

active

044824998

ABSTRACT:
Organic isocyanates, preferably alkyl, mono-, di- and/or polyisocyanates or aryl-mono-, di- and/or polyisocyanates, are prepared by thermally cleaving the corresponding urethanes at temperatures of 175.degree. C. to 600.degree. C. in the presence of carbon, preferably in an agitated carbon bed or in a fluidized bed containing carbon.

REFERENCES:
patent: 2409712 (1946-10-01), Schweitzer et al.
patent: 3870739 (1975-03-01), DeLaMater et al.
patent: 4081472 (1978-03-01), Tsumura et al.

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