Process for producing cyanuric acid from urea hydrohalides

Details Process for producing cyanuric acid from urea hydrohalides Process for producing cyanuric acid from urea hydrohalides

1986-02-21

1987-04-07

Ford, John M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D25132

Patent

active

046562710

ABSTRACT:
A process for producing cyanuric acid which comprises feeding a urea hydrohalide compound to a pyrolysis zone.
The urea hydrohalide compound is pyrolyzed to produce a solid reaction mixture of cyanuric acid and an ammonium halide. The solid reaction mixture is vaporized to remove the ammonium halide to form a gaseous mixture containing ammonia and hydrogen halide which is simultaneously removed from the pyrolysis zone. The cyanuric acid recovered is substantially free of ammonium halide.
The novel process produces high purity cyanuric acid in the absence of liquid effluents while readily recovering the ammonia and hydrogen halide values.

REFERENCES:
Strongin, G. M. and V. I. Smirnov, "Preparation of Urea Hydrochloride," Trudy po khimii i khimicheskoi tekhnologii, No. 2, 1966, pp. 323-325.
Schiltknecht, F. J., "Uber den Reaktionsmechanismus der Pyrolyse von Harnstoff zu Cyanursaure," Prom. Nr. 3403, Zurich, pp. 69-75, 1963.

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