Process for separating nh3, and optionally also co2 and h2o,...

Details Process for separating nh3, and optionally also co2 and h2o,... Process for separating nh3, and optionally also co2 and h2o,...

C - Chemistry, Metallurgy

01

C

C01C 1/12 (2006.01)

Patent

CA 2513372

The invention relates to a process for separating NH3 from a mixture containing NH3, CO2 and H2O which comprises an NH3 rectification step carried out in a NH3 separation device to which one or more streams containing NH3, CO2 and H2O, including the mixture, are supplied, with a stream consisting substantially of gaseous NH3 being formed in the NH3 separation device, separated from the mixture and discharged. In the process according to the invention a condensation step is carried out on at least one of the stream consisting substantially of gaseous NH3 or the one or more streams containing NH3, CO2 and H2O supplied to the NH3 separation device, in which at least a part of the existing CO2 is converted to a liquid phase.

L'invention concerne un procédé de séparation de NH¿3? d'un mélange renfermant NH¿3?, CO¿2? et H¿2?O, comprenant une étape de rectification de NH¿3? effectuée dans un dispositif de séparation de NH¿3? dans lequel un ou plusieurs flux renfermant NH¿3?, CO¿2? et H¿2?O, notamment le mélange, sont alimentés, un flux comprenant sensiblement du NH¿3? gazeux formé dans le dispositif de séparation de NH¿3? étant séparé du mélange et déchargé. Dans le procédé selon l'invention, une étape de condensation est effectuée sur au moins un des flux renfermant sensiblement du NH¿3? gazeux ou les flux renfermant NH¿3?, CO¿2? et H¿2?O alimentés dans le dispositif de séparation de NH¿3?, dans lequel au moins une partie du CO¿2? existant est convertie en phase liquide.

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