Process for the preparation of urethanes

Details Process for the preparation of urethanes Process for the preparation of urethanes

1984-01-09

1984-10-30

Helfin, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

560 9, 560 12, 560 13, 560 24, 560 25, 560115, 560135, 560148, 560150, 560156, 560158, 560157, C07C12506

Patent

active

044801106

ABSTRACT:
A process for the preparation of N,O-disubstituted urethanes. A substituted urea, an alcohol and a compound taken from the group consisting of N-unsubstituted urethanes, urea, polyurets and mixtures thereof at a temperature of 120.degree.-350.degree. C. The urethanes prepared by this process are particularly suitable for the preparation of isocyanates.

REFERENCES:
patent: 2409712 (1946-10-01), Schweitzer et al.
patent: 2806051 (1957-09-01), Brockway
patent: 2834799 (1958-05-01), Sowa
Paquin, Chem. Abs., 42 (1948) 123(i).

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