Why can not the urea aqueous solution instead of the general automotive vehicle urea solution is a urea solution with a urea-based chemical reactants Shandong vehicle urea plant, a mixture of urea and high purity deionized water is made, is a concentration of 32.5% solution . The car used by urea solution SCR (Selective Catalytic Reduction) system, is a key engine exhaust emissions to meet State IV emission standard and above. Selection of different quality urea solution, for the maintenance of vehicles are different. Resulting purity urea solution elected by enough, particulate matter, heavy metals and other impurities present time, the vehicle will SCR system nozzles, filters and other parts of serious harm, unnecessary economic losses. Low quality urea solution is not high if the chemical composition, the presence of heavy metals and other chemicals when chemically react with the catalyst to reduce exhaust gas conversion effect, even useless. Therefore, the price of urea vehicle, when the urea solution in the selection should try to use high-quality products, in order to control the maintenance cost of the vehicle. Urea formula: CO (NH2) 2, relative molecular mass 60.06, CO (NH2) 2 colorless or white needle-like or rod-like crystals, industrial or agricultural product is a white, slightly reddish solid particles, a pungent odor. Nitrogen is about 46.67%. Density of 1.335g / cm3. Melting point 132.7 ℃. Soluble in water, alcohol, insoluble in ether and chloroform. Weakly alkaline. Can form salts with acid. There hydrolysis. Can be carried out at elevated temperature condensation reaction of biuret, tripropylene urea and cyanuric acid. Was heated to 160 ℃ decomposition, ammonia is generated simultaneously becomes isocyanate. Because in human urine containing such substances automotive urea, urea so named. Urea nitrogen (N) 46%, the amount of nitrogen fertilizer is a solid top. Urea in an acid, alkali, enzymes (acid, alkali to be heated) can be hydrolyzed to produce ammonia and carbon dioxide. Thermally unstable, heated to 150 ~ 160 ℃ the deamination into biuret. If rapid heating deaminase and three clustered into six-membered ring compound cyanuric acid. (Mechanism: first deamination isocyanate (HN = C = O), repeatedly poly) with acetyl chloride or acetic anhydride to generate action diacetyl-urea and urea. In the role of ethanol and sodium diethyl malonate reaction malonyl urea (also known as barbiturate, because there is a certain acidity). In alkaline catalyst such as ammonia can react with formaldehyde, condensation into a urea-formaldehyde resin. Semicarbazide with hydrazine hydrate generation effect. Car urea production facilities, Delta Chi Tung Chemical (certified), vehicle urea provided by Delta Chi Chemical Co., Ltd. Jinan East. Jinan East Delta Chi Chemical Co. (sddqhd.com) is a leader in Jinan, chemical equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. East Delta Chi Chemical leadership with the staff warmly welcome all inquiries negotiations to create the East Delta Chi Chemical better future.