REMOVAL OF UREA AND AMMONIA FROM EXHAUST GASES

The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising l...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MEESSEN Jozef Hubert, ORFANIDIS Pantelis
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS AMMONIA CHEMISTRY COMPOUNDS THEREOF CYANOGEN FERTILISERS INORGANIC CHEMISTRY MANUFACTURE THEREOF METALLURGY NITROGENOUS FERTILISERS ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.