Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-09-22
1978-10-31
Torrence, Dolph H.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260463, 560132, C07C11800
Patent
active
041234502
ABSTRACT:
Alkylisocyanates are prepared by reacting a phenol or substituted phenol and phosgene in a halogenated hydrocarbon solvent with aqueous alkali metal hydroxide to produce a corresponding chloroformate, reacting the resulting chloroformate solution with aqueous alkylamine to give a corresponding N-alkylcarbamate which, after solvent is stripped, is then pyrolyzed to yield the alkyl isocyanate. Solvent and the starting phenol may be recovered and recycled to the process.
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patent: 3919279 (1975-11-01), Rosenthal et al.
patent: 4003938 (1977-01-01), Koenig et al.
Strain et al., JACS, vol. 72, p. 1254 (1950).
Crosby et al., JACS, vol. 76, p. 4458 (1954).
Kirk-Othmer Encyclopedia of Chemical Technology, 2nd Ed., vol. 12, p. 54, Interscience, 1967.
Jacobi et al., Chemical Abstracts, vol. 53, 22718d (1959).
Andersen Robert L.
Ertelt H. Robinson
FMC Corporation
Torrence Dolph H.
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