Its origin and the status quo: Due to national environmental protection departments to further reduce diesel emissions of nitrogen oxide pollutants discharge. Domestic commonly known as Euro IV standards. Engine manufacturers began using SCR technology (Selective Catalytic Reduction Technology selective catalytic reduction technology) to meet the requirements of the environmental protection department. Diesel Exhaust Fluid (domestic commonly known as: automotive urea, urea vehicle, automotive environmental urea), is a must to use SCR technology consumables. SCR systems include urea tank (loaded diesel exhaust treatment solution), SCR catalytic reaction tank. SCR system is running: When the discovery of nitrogen oxides in the exhaust pipe, urea tank is automatically ejected diesel exhaust treatment fluid, diesel exhaust treatment liquid and nitrogen oxide redox reaction in SCR catalytic reaction tank, generate no contaminated with nitrogen and water vapor is discharged. If you do not load diesel exhaust treatment liquid, or pure enough, or inferior quality will occur automatically slow down the vehicle's engine. Meanwhile, the quality of shoddy treatment of diesel exhaust fluid can contaminate the SCR catalyst in the catalytic reaction tank, causing serious consequences. In fact, in Europe, in 2006 it has begun to implement this policy. European diesel exhaust treatment solution called Adblue. BP and other major representatives. In the United States, starting in 2010, with the implementation of standards EPA2010, also increased the application of comprehensive efforts to implement the product in the United States, diesel exhaust treatment solution called DEF (Diesel Exhaust Fluid). The main representatives BlueDEF so on. At present, the product has two main international certification, one German Automobile Industry Association (VDA) of AdBlue certification, and the other is the American Petroleum Institute (API) of DEF certification. In China, Jiangsu, KLS is the only company currently more than two certified diesel exhaust treatment solution manufacturer. In China, for the production of diesel exhaust treatment solution is still an emerging industry, the current major manufacturers including KLS, Sinopec, Yuchai, etc., is expected in the second half of 2011 or the first half of 2012 will be to develop our own Diesel exhaust treatment liquid products with national standards.