Removal of ammonia nitrogen, ammonium nitrogen and urea...

Details Removal of ammonia nitrogen, ammonium nitrogen and urea... Removal of ammonia nitrogen, ammonium nitrogen and urea...

B - Operations, Transporting

01

D

B01D 53/58 (2006.01)

Patent

CA 2746480

Process for scrubbing out ammonia nitrogen and/or ammonium nitrogen and/or urea nitrogen from exhaust gases enriched with these nitrogen compounds in plants for producing ammonia or urea, wherein the nitrogen compounds first form with a hypochlorite-containing solution in a scrubber an intermediate which under acidic or neutral reaction conditions is reacted to form elemental nitrogen and salt, and the reaction of the nitrogen compounds to form elemental nitrogen and salt proceeds in a pH range of 4 to 6.

L'invention concerne un procédé d'élimination par lavage d'azote ammoniacal et/ou de nitrate d'ammonium et/ou de nitrate d'urée à partir des gaz d'échappement enrichis avec des composés azotés dans des installations de production d'ammoniac ou d'urée, les composés azotés formant avec une solution contenant de l'hypochlorite dans un laveur tout d'abord un intermédiaire qui est transformé dans des conditions de réactions acides ou neutres en azote élémentaire et sel et la transformation des composés azotés en azote élémentaire et sel se déroulant dans une plage de valeur du pH de 4 à 6.

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