Method for preventing urea from caking

The method of preventing urea from caking is that before urea pelletizing, formaldehyde and urea in the molar ratio of 4-6 are made to react fully for 1-10 hr to produce urea formaldehyde solution with pH 6-8. The urea formaldehyde solution is used as additive for pelletizing urea and added directly...

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Bibliographische Detailangaben
Hauptverfasser:	CHUANZHENG LIU, GUORU LIU, WEICHUN LI
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The method of preventing urea from caking is that before urea pelletizing, formaldehyde and urea in the molar ratio of 4-6 are made to react fully for 1-10 hr to produce urea formaldehyde solution with pH 6-8. The urea formaldehyde solution is used as additive for pelletizing urea and added directly without passing concentration and evaporation to the inlet of urea pump.