METHODS FOR THE PRODUCTION OF NITROGEN FERTILIZER AND NITROGEN-SULFUR FERTILIZER

The present invention relates to methods for the co-production of urea-based solid nitrogen fertilizer and urea-based solid nitrogen-sulfur fertilizer wherein urea recovered from a gas stream obtained from regular urea production is recycled and used to produce nitrogen-sulfur fertilizer containing...

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Bibliographische Detailangaben
Hauptverfasser:	TELEN, Lien, VAN CAUWENBERGH, Jeroen, VANDENDRIESSCHE, Jan, BROUWER, Mark
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY FERTILISERS FERTILISERS CHARACTERISED BY THEIR FORM MANUFACTURE THEREOF METALLURGY MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05 MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS NITROGENOUS FERTILISERS ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:	The present invention relates to methods for the co-production of urea-based solid nitrogen fertilizer and urea-based solid nitrogen-sulfur fertilizer wherein urea recovered from a gas stream obtained from regular urea production is recycled and used to produce nitrogen-sulfur fertilizer containing a nitrification/urease inhibiting sulfur compound selected from thiosulphate salts, (bi)sulfite salts, polysulfide salts, (bi)sulfide salts, metabisulfite salts, dithionite salts, elemental sulfur and combinations thereof, preferably selected from the group consisting of thiosulphate salts, (bi)sulfite salts, polysulfide salts and combinations thereof. The present invention further relates to certain fertilizer compositions obtainable by the methods of the invention wherein ammonium sulphate and/or ammonium nitrate is further produced from the gas stream and combined to make a nitrogen-sulfur fertilizer.