PROCESS OF PRODUCTION OF MIXED FERTILIZERS WITH TRACE MINERALS Russian patent published in 2004 - IPC

FIELD: fertilizers. SUBSTANCE: process is characterized by preliminarily mixing trace minerals followed by mixing them with phosphorus-, potassium-, and nitrogen- containing components. Resulting mix is tableted at pressure 10 to 150 MPa and moisture content 0.3 to 3.4%. Particular trace minerals are represented by compounds of manganese, copper, zinc, cobalt, and molybdenum, which are mixed at weight ratio (10-50):(5-20):(4-10):(2-6): 1, respectively. Weight ratio ammophos/potassium chloride/urea/trace mineral mixture is as follows: (1.68-3.36):(1.40-2.85):(0.95-3.11):1, respectively. EFFECT: improved quality and agrochemical efficiency of fertilizers, and simplified production technology. 2 cl, 2 ex