Phosphoric Acid → Phosphorus oxide (P4O10)

Participants

Reaction Steps

The above objects are provided by a continuous slurry process for the production of granulated fertilizers comprising the steps of (a) continuously introducing into a pre-reactor comminuted phosphate rock, phosphoric acid in an amount sufficient to provide a ratio of P2O5 to CaO of 0.7 to 1.0 and water in an amount sufficient to dilute the phosphoric acid to not less than 38%, (b) heating the mixture with continuous agitation, while (c) continuously transferring the mixture to a digester, (d) heating the mixture in the digester with agitation for a length of time sufficient to form a slurry, while, (e) continuously withdrawing slurry as an overflow stream, (f) splitting the withdrawn slurry stream into two streams, (g) recycling one stream to the pre-reactor or to the digester, (h) delivering the other stream to a granulator and mixing with other dry fertilizer ingredients, thereby producing fertilizer granules, and (i) drying the granules.

Provenance & Evidence