Molten phosphorus-potassium fertilizer, and its preparation process
AssigneeMineracao Curimbaba Ltda.
InventorsMinoru Yasuda, Gabriel Warwick Kerr de Paiva Cortes
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Abstract
The present invention relates to an amorphous, vitreous phosphorus-potassium fertilizer obtained by melting raw materials containing phosphorus pentoxide (P2O5), potassium oxide (K2O), providers of SiO2 and silicates, and providers of MgO and CaO. The fertilizer of the present invention is produced by a process of melting the raw materials, followed by quenching, enabling the formation of a vitreous and amorphous material containing phases of phosphorus and of potassium, which are soluble in a weak acid.
Claims6
A phosphorus-potassium fertilizer, comprising an amorphous, vitreous product obtained from raw materials containing:
- phosphorus pentoxide (P2O5);
- potassium oxide (K2O);
- a provider of SiO2 and silicates that is selected from the group consisting of quartz, sand, dunite, and serpentinite;
- a provider of MgO selected from the group consisting of magnesite, dunite, serpentinite, and dolomite;
- and
- dolomite as a provider of CaO,
- wherein the phosphorus-potassium fertilizer comprises at least 14.0% of total phosphorus pentoxide, based on the total weight of the fertilizer.
Dependencies are inferred from the claim text.