Production of cyanuric acid

Details Production of cyanuric acid Production of cyanuric acid

1980-01-03

1987-02-24

Jiles, Henry R.

Chemistry: electrical and wave energy

Processes and products

544192, C25B 300, C07D25132

Patent

active

046455779

ABSTRACT:
There is disclosed a method for the conversion of urea to cyanuric acid and cyclic by-products which comprises exposing urea in a liquid state to microwave radiation. Urea in liquid form, either molten anhydrous or in solution, is absorbent to microwave radiation, readily converting to cyanuric acid and cyclic by-products such as ammeline and ammelide. The desired products are substantially transparent to microwave radiation and the method thus avoids degradation of the desired products. Conversion of urea with microwave radiation also avoids the difficulties experienced with thermal decomposition that results from the poor thermal conductivity of the crude reaction products. The method thus permits conversion of urea in the form of a layer of urea directly to cyanuric acid and cyclic by-products.

REFERENCES:
patent: 2527316 (1950-10-01), Mackay
patent: 3093641 (1963-06-01), Formaini
Kirk-Othmer, Encyclopedia of Chemical Technology, pp. 563-586, 2nd ed.
Copson, Microwave Heating, AVI Publishing Company, Inc., Westport, Conn., 1962, pp. 372-373.

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