Production of high-quality liquid fertilizers from wet-process acid via urea phosphate

Abstract A pilot-plant process is described that purifies wet-process phosphoric acid for the production of a high-quality urea-ammonium polyphosphate base solution. An intermediate product, crystalline urea phosphate, is produced from urea and merchant-grade (54% P2O5) wet-process phosphoric acid. ...The urea phosphate crystals contain only about 15 to 20% of the objectionable impurities (iron, aluminum, and magnesium) originally contained in the feed wet-process acid. The urea phosphate crystals are pyrolyzed, converting orthophosphate to polyphosphate with very little energy consumption. The resulting melt is dissolved and neutralized with ammonia to produce 14-29-0 liquid product of high polyphosphate content. Ausführliche Beschreibung Beschreibung ausblenden

1. Person:	Hodge, C. A.
Weitere Personen:	Motes, T. W.
Quelle:	in Nutrient cycling in agroecosystems Vol. 39 (1994), p. 59-69 Weitere Artikel
Format:	Online-Artikel
Genre:	Batch, clear liquid, continuous, crystalline, fertilizer, polyphosphate, purification, urea phosphate, wet-process phosphoric acid
Sprache:	English
Veröffentlicht:	1994
Beschreibung:	Online-Ressource
Online Zugang:	Online
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Anmerkung:	Copyright: Copyright 1994 Kluwer Academic Publishers