Urea can be used in large quantities as raw material for the production of melamine, urea formaldehyde resin, hydrazine hydrate, tetracycline, Phenobarbital, caffeine, reduced brown BR, phthalocyanine B, phthalocyanine Bx, monosodium glutamate and other products.
It has a brightening effect on chemical polishing of steel and stainless steel, and is used as a corrosion inhibitor in metal pickling, as well as in the preparation of palladium activation solution.
In industry, it is also used as the raw material for manufacturing urea formaldehyde resin, polyurethane and Melamine resin. When the urea is heated to 200 ℃, it generates solid melamine (i.e. cyanuric acid). The derivatives of Cyanuric acid trichloroisocyanuric acid, sodium dichloroisocyanate, tri (2-hydroxyethyl) isocyanurate, tri (Allyl group) isocyanurate, tri (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanate, tri Glycidol ether of isocyanic acid, and melamine complex of cyanuric acid have many important applications. The first two are new high-end disinfectants and bleaches, with a total production capacity of over 80000 tons of trichloroisocyanuric acid worldwide.
Selective reducing agent for denitrification of combustion exhaust gas, as well as automotive urea, consisting of 32.5% high-purity urea and 67.5% deionized water.
Selective Catalytic Reduction (SCR) exhaust post-treatment is a technology that selectively catalyzes the reduction of nitrogen oxides (NOx) in automotive exhaust gas through the pyrolysis reaction of ammonia generated by urea in the combustion exhaust. It is a key and mainstream technology for reducing harmful substances such as NOx in combustion exhaust gases such as boilers and diesel engines. SCR system is a necessary system to meet Hyundai Motor Company’s strict emission laws and regulations, such as Euro IV/Euro V/Euro VI (national IV/national V/national VI) regulations. Automotive urea is called AdBlue in Europe and DEF in the United States.
Raw materials of special plastics, especially Urea-formaldehyde, some rubber raw materials, fertilizer and feed ingredients, replacing antifreeze salt scattered on the street (the advantage is that it does not corrode metal), enhancing the smell of cigarettes, giving industrial Pretzel brown, some shampoo, detergent ingredients, ingredients of first-aid refrigeration package (because urea reacts with water to absorb heat), automotive urea treatment diesel engine, engine Waste gas from thermal power plants can especially reduce nitrogen oxide, composition of rain promoter (complex salt), used to separate paraffin (because urea can form Inclusion compound), refractory materials, composition of environmental engine fuel, composition of tooth whitening products, chemical fertilizers, important auxiliary agents for dyeing and printing.
Post time: Aug-02-2023