OBTAINING HUMATED CARBAMIDES BASED ON CARBAMIDE AND SODIUM HUMATE, POTASSIUM AND AMMONIUM FUSION

Abstract

The article presents the humated urea obtaining studies results by adding urea to the melt before granulation separately humate sodium, potassium and ammonium at mass ratios СО(NH2)2: humate= 100:(0,1-3). It is shown that the urea properties with the studied relations more strongly influenced by sodium humate than potassium and ammonium humate. In fertilizers obtained with the sodium, potassium and ammonium humate addition to the urea melt at СО(NH2)2 mass ratio: humate=100:3  the granules strength increases from the original 1.35 to 2.18; 2.03; 1.91 Mpa, the gyroscopic point decreases from 75.3% to 65.8; 68,8; 69,4% relatively. It was also revealed that when humates are added to the urea melt density and melt viscosity increase with an increase in the amount of introduced humates. At 142°C, an increase in the sodium humate proportion from 0.1 to 3.0 mass parts per 100 urea mass parts leads to an increase in density from 1.294 to 1.375 g/cm3 viscosity from 3.15 to 3.38 cps., potassium humate from 1.281 to 1.354 g/cm3 and from 3,12 to 3,32 cps., ammonium humate from 1,285 to 1,366 g/сm3 and from 3,14 to 3,35 cps. If industrial urea granules dissolution in water averages 112 seconds and the sodium humate introduction into its composition in an amount of 0.1 to 3 g increases dissolution time from 115 to 182 seconds, potassium humate from 114 to 168 seconds, ammonium humate from 113 to 152 seconds. The results obtained are the technological basis for the humated urea production based on urea melt and dry sodium, potassium and ammonium humate powders.