C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 273/04 (2006.01) B01J 3/03 (2006.01) B01J 10/00 (2006.01) B01J 19/00 (2006.01)
Patent
CA 2265459
A urea synthesis process starting from ammonia and carbon dioxide carried out under a pressure of 120x102 to 400x102 KPa and a temperature of 140 to 215 ~C, in which the reaction takes place in a reactor in which gaseous CO2 is fed in the bottom of the reactor while liquid ammonia and the recycled ammonium carbamate aqueous solution are fed from the top of the reactor, and going downward the reactor, they meet in countercurrent the rising gaseous CO2.
L'invention a trait à un procédé permettant de synthétiser de l'urée à partir d'ammoniac et de dioxyde de carbone, sous une pression comprise entre 120 x 10?2¿ et 400 x 10?2¿ kPa et à une température comprise entre 140 et 215 ·C. La réaction s'effectue dans un réacteur. Le CO¿2? est amené dans la partie inférieure du réacteur tandis que l'ammoniac liquide et la solution aqueuse de carbamate d'ammonium recyclé qui y pénètrent par la partie supérieure, descendent le long de celui-ci et se mêlent, à contre-courant, au CO¿2? gazeux en train de s'élever.
Oyen Wiggs Green & Mutala Llp
Siirtec-Nigi S.p.a.
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