Industrial application of Urea

- May 17, 2017 -

The chemical polishing of steel and stainless steel has a luster effect, as a corrosion inhibitor in metal pickling, and also for the preparation of Palladium activation solution.

Industrially also used as raw materials for the manufacture of urea-formaldehyde ester, polyurethane, melamine-formaldehyde resins, urea heating to 200 ℃ to generate solid tri-chlorate (i.e. cyanide uric acid). Derivative cyanuric acid, sodium chloride, two chloride, cyanuric acid 3 (2-hydroxyethyl), cyanuric acid Three (allyl) ester, three (3,5-di-tert-butyl-4-hydroxy-Benzyl) isocyanate, three-glycidyl isocyanate ether, cyanuric acid melamine complexing compounds and so on have many important applications. The first two are new high-grade disinfection, bleach, cyanuric acid total production capacity of the world over 80,000 T.

The selective reduction agent for the combustion of exhaust gases, as well as the vehicle urea, comprising 32.5% of high purity urea and 67.5% deionized water.

The selective catalytic reduction (SCR) exhaust treatment is ammonia produced by pyrolysis of urea in combustion exhaust. A technique for selective catalytic reduction of nitrogen oxides (NOx) in automotive exhaust gases is a key and mainstream technology for reducing NOx in combustion exhaust fumes from combustion boilers and diesel engines. The SCR system is the necessary system to satisfy the strict emission regulations of modern automobiles, such as European Ⅳ/European V/VI (V/State IV/). The vehicle with urea in Europe is called AdBlue (Tim Blue liquid), called Def in the USA (diesel exhaust fluid).

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