FIELD: chemistry.
SUBSTANCE: method comprises the following steps: i) phosphoric acid (PA) provision as an aqueous solution and partial neutralization with an aqueous neutralizer selected from monopotassium phosphate (MPP) and potassium hydroxide (KOH) in a reactor, ii) drying of the said aqueous mixture obtained in step i) in a vacuum drier to obtain a solid material containing less than 5 wt % of water, iii) cooling of the said solid material obtained in step ii) to ambient temperature, and iv) mixing of the said cooled solid material with a solid source of magnesium.
EFFECT: production of bulk solid fertilizer without tendency to caking, including acidic phosphate with a formula.
11 cl, 2 ex
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