C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 251/32 (2006.01) B01J 19/28 (2006.01)
Patent
CA 2076306
A process for preparing cyanuric acid comprises a first step of preparation of urea cyanurate by reaction, in a first rotary reactor, of urea with recirculated cyanuric acid and a second step of pyrolysing the urea cyanurate in a second reactor. The first reactor is provided with a helical fin extending inwardly from the internal cylindrical surface thereof and is heated to a temperature ranging from 180° to 350°C., there being obtained balls of urea cyanurate, the dryness of which facilitates the transportation thereof, at the same time as it avoids the agglomeration thereof and subsequent adherence to the walls of the second reactor. The second reactor is rotary and is in communication, by means of a communication tube, with a solids separator vessel in which there is an aqueous solution, setting a working level under which there is the access port of the tube to the vessel, the aqueous solution receiving the solid products formed in the pyrolysis and being periodically renewed by removal of the suspension formed and supply of fresh aqueous solution.
Aragonesas Delsa S.a.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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