t-Carbinamines, RR'R ″CNH2. III. The Preparation of Isocyanates, Isothiocyanates and Related Compounds1

N Bortnick, LS Luskin, MD Hurwitz…

Index: Bortnick et al. Journal of the American Chemical Society, 1956 , vol. 78, p. 4358,4360

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Citation Number: 35

Abstract

Thermal dissociation of carbamates to isocyanates and alcohols is difficult and requires temperatures above 250'. The lower N-alkylcarbamates, which distil without decomposition under atmospheric pressure, must therefore be cracked in vapor phase operation. 2 The requisite temperatures for liquid phase cleavage can be attained by the distillation of esters of high boiling alcohols. 2 Although Raney nickel effects the cleavage of urethans, it has ...