Urea is a colorless crystal, which dissolves in water. It is a weak alkaline, which forms salts in combination with strong acids. Urea is largely used as a fertilizer and as a non-protein feed supplement for ruminants.
Urea can be produced by numerous methods but mainly it is commercially made by reacting carbon dioxide with ammonia at 200 ºC (392 ºF). Vaisala K-PATENTS® Process Refractometer PR-43-GP is used for quality control. It monitors the concentration of produced urea after the reactor.
The Process Refractometer PR-43-GP is also used to measure the concentration of dissolved urea in water in the manufacture of medicinal insulin.
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