Preparation of trans cyclohexane 1,4 diisocyanate

Details Preparation of trans cyclohexane 1,4 diisocyanate Preparation of trans cyclohexane 1,4 diisocyanate

1978-03-06

1980-05-20

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453A, 260553R, 260553D, 260557R, 260563R, 560115, C07C10319, C07C11800, C07C12506, C07C12715

Patent

active

042039169

ABSTRACT:
A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a trans-cyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans-cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide. The latter compound is then converted into a

REFERENCES:
patent: 2728787 (1955-12-01), Hurwitz et al.
patent: 2773086 (1956-12-01), Slocombe et al.
patent: 3644459 (1972-02-01), Cross

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