Method of quantitatively producing ammonia from urea

Details Method of quantitatively producing ammonia from urea Method of quantitatively producing ammonia from urea

C - Chemistry, Metallurgy

01

C

C01C 1/08 (2006.01)

Patent

CA 2502379

Method and apparatus for continuously, quantitatively producing gaseous ammonia from urea, including the steps of: dissolving urea in water to form concentrated aqueous urea comprising at least 77 wt. % urea; continuously feeding the concentrated aqueous urea into a reactor; continuously feeding a separate, additional supply water into the reactor to form an aqueous urea reaction mixture; heating the aqueous urea reaction mixture; and continuously withdrawing a gas phase product including ammonia from the reactor, is disclosed. Also disclosed are methods and apparatus for continuous and batchwise dissolution of urea to form aqueous urea solutions.

La présente invention a trait à des procédés et un appareil pour la production quantitative continue d'ammoniac gazeux à partir de l'urée, comprenant les étapes suivantes : la dissolution de l'urée dans l'eau pour former une urée aqueuse comprenant au moins 77 % en poids d'urée ; l'alimentation continue d'urée aqueuse concentrée dans le réacteur ; l'alimentation continue d'un apport d'eau distincte et supplémentaire dans le réacteur pour former un mélange réactionnel d'urée aqueuse ; le chauffage du mélange réactionnel d'urée aqueuse ; et la récupération continue d'un produit en phase gazeuse comprenant de l'ammoniac du réacteur. L'invention a également trait à des procédés et un appareil pour la dissolution continue et discontinue d'urée pour former des solutions d'urée aqueuse.

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