METHOD OF PREPARING ZINC NITRATE-PHOSPHATE CONCENTRATE Russian patent published in 2010 - IPC C23C22/07 C23C22/13 C01G9/00 C01B25/28 

FIELD: chemistry.

SUBSTANCE: method of preparing zinc nitrate phosphate concentrate involves mixing phosphate- and zinc nitrate-containing reagents. The zinc nitrate-containing reagent used is aqueous zinc nitrate solution with the following ratio of components: Zn²⁺:NO₃ ^-:H₂O=(1-1.27):(2.53-2.98):(3.94-5.02). The phosphate-containing reagent used is aluminium phosphate with the following ratio NH3 : P₂O₅ = 0.6 : 2.57 in amount of 70-100% of total content of P₂O₅ in the concentrate and phosphoric acid from 0 to 30% of the total content of P₂O₅ in the concentrate.

EFFECT: invention increases output and reduces cost of concentrates, widens the raw material base for producing concentrates, increases safety of production conditions.

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