Process for the preparation of isocyanic acid by the decompositi

Details Process for the preparation of isocyanic acid by the decompositi Process for the preparation of isocyanic acid by the decompositi

1993-08-13

1994-11-01

Dees, Jose G.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Carbon containing

423365, 560330, 560344, C01B 2112

Patent

active

053606019

ABSTRACT:
A process for the preparation of isocyanic acid, characterized in that N,N-disubstituted ureas are decomposed at elevated temperature to a secondary amine of lower volatility and to isocyanic acid, which is drawn off at the top.

REFERENCES:
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patent: 3970742 (1976-07-01), Verstegen
patent: 5043444 (1991-08-01), Mullner et al.
patent: 5078980 (1992-01-01), Mullner et al.
patent: 5124451 (1992-06-01), Hackl et al.
patent: 5169954 (1992-12-01), Hackl et al.
Chemical Abstracts, 102:46723r (1985), "Method and Apparatus for Preparing a Cyanuric Acid-Poor Isocyanic Acid-ammonia Gas Mixture".
Chemical Abstracts, 104:88146b (1986), "Fluidized Bed Reactor and Method for Producing Low-Cyanuric Acid Isocyanic Acid-Ammonia Gas Mixtures".
Chemical Abstracts, vol. 81: 172444m (1974), "Isocyanic Acid From Urea".
Chemical Abstracts, 82: 173135u (1974), "Isocyanic Acid".
Chemical Abstracts, 116:109513j (1992), "Manufacture of Liquid Isocyanic Acid".

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