ROCK PHOSPHATE MEAL FROM KIMOVSKY PHOSPHATE DEPOSIT AS FERTILIZER Russian patent published in 1997 - IPC

FIELD: agriculture; chemical industry; production of fertilizers. SUBSTANCE: advantage of phosphates mined at Kimovsky phosphate deposit and ground to rock phosphate meal resides in fact that it contains phosphorus pentoxide (P₂O₅) in easily assimilable form (so-called "citric-acid-soluble" form) and fraction of this form accounts for 50-70% of total phosphorus pentoxide content, in phosphates. To be specific, total phosphorus pentoxide content in phosphates is 15-16 wt. %, and fraction of its citric-acid-soluble form reaches 7-11.2 wt. %. This relationship of two forms of P₂O₅ explains high fertilizing value of Kimovsky phosphates. EFFECT: 1) cheap and effective fertilizer for agriculture; 2) fertilizer production process is made cheaper and simpler. 2 cl, 2 tbl