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Urea
Urea commercial uses
Granula

- As a component of fertilizer and animal feed, providing a relatively cheap source of fixed nitrogen to promote growth.

- As a raw material for the manufacture of plastics specifically, urea-formaldehyde resin.

- As a raw material for the manufacture of various glues (urea-formaldehyde or urea-melamine-formaldehyde). The latter is waterproof and is used for marine plywood.

- As an alternative to rock salt in the deicing of roadways and runways. It does not promote metal corrosion to the extent that salt does.

- As an additive ingredient in cigarettes, designed to enhance flavour.

- Sometimes used as a browning agent in factory-produced pretzels.

- As an ingredient in some hair conditioners, facial cleansers, bath oils and lotions.

- It is also used as a reactant in some ready-to-use cold compresses for first-aid use, due to the endohermic reaction it creates when mixed with water.
- Active ingredient for diesel engine exhaust treatment AdBlue and some other SCR systems.

- Used, along with salts, as a cloud seeding agent to expedite the condensation of water in clouds, producing precipitation.

- The ability of urea to form clathrates (also called “loose compounds” host-guest complexes, inclusion compounds, and adducts) was used in the past to separate paraffins.

- As a flame-proofing agent.

- As a clean burning fuel for motor vehicles and stationary engines.

- As a NOx-reducing reactant in diesel exhaust.

Granula vs Prilled Urea

Prilled

More than 90% of world production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use. Urea is a raw material for the manufacture of many important chemical compounds, such as : plastics (urea-formaldehyde resins), adhesives ( urea-melamine- formaldehyde) and industrial feedstock ( Potassium cyanate ).

Granular Urea Specifications

Prilled Urea Specifications

Product Description

UREA prill is a small diameter, spherical white solid. It is an organic amide molecule containing 46% nitrogen in the form of amine groups. UREA is infinitely soluble in water and is suitable for use as an agricultural and forestry fertilizer as well as for industrial applications which require a high quality nitrogen source. It is not a poison to mammals and birds and is a benign and safe chemical to handle.



Application Recommendations:

- UREA prill is used as a slow release fertilizer. It must be decomposed by micro­organisms before it can be assimilated by plants.

- ALWAYS exercise caution when using this chemical as fertilizer because it has the highest nitrogen content of any solid.

Solid urea is the largest nitrogen fertilizer product which is produced in two forms of granules and prills. Although the chemical properties of both prills and granules remain similar, their different physical and mechanical properties are distinguishable and make them suitable for different application either as fertilizer or raw materials for chemical industry. The objective of this work is to analyses physical and mechanical properties of urea granules produced in two different plants in Malaysia using fluidized bed process and compare them with the imported urea prills to the country; hence make a process-product relationship for urea finishing processes. Results of size distribution of the samples show that the most of the granules fall in the size range between 2.40 and 3.50 mm, whereas the prills size is around 1.60 mm. Strength measurement using side crushing test also shows that the prills with the average failure load of 3.80 N remain significantly weaker than the granules with failure load of 10-17 N. Strength distribution of the particles also shows that a more uniform strength distribution is observed for the prills than the granules. It is concluded that the urea prilling process is the finishing process which produces the weaker and the more uniform size and strength of the particles than the fluidized-bed granulation process.