Urea is a white crystalline substance with the chemical formula CO(NH2)2;it is highlywater soluble and contains 46% nitrogen. It was the first organic compound ever synthesized by chemists; this was accomplished in the early 1800s. it is produced in Prilled as well as in Granular forms.
Urea prills are formed by dropping liquid urea from a prilling tower into droplets that dry into roughly spherical shapes 1mm to 4 mm in diameter. The counter current of air is used as the cooling media for solidification of prills falling from top of prilling tower. Kribhco produces prilled urea at its manufacturing site at Hazira. The properties of Urea produced are as follows:
Nitrogen content : 46 % Minimum
Biuret : 1 % Maximum
Moisture : 0.5 % Maximum
Particle Size : 1-2.8 mm : 90 % Min.
Granular urea is chemically the same as prilled urea. Granular urea, however, is slightly larger and harder. Today, the use of prilled urea is more prevalent because it is more resistant to breaking down when being blended with the other components of fertilizer. Kribhco imports granular urea produced at its joint venture plant at OMIFCO, SUR, OMAN. The properties of imported granular Urea are as follows:
Nitrogen content: 46 Pct Minimum
Biuret : 1 Pct Maximum
Moisture : 0.5 Pct Maximum
Particle Size : 2-4mm : 90 Pct Min.