Diesel engine exhaust treatment liquid (commonly known as: automotive urea, urea vehicle, automotive environmental urea), in China and Europe, called AdBlue, in the Americas called DEF, in Brazil called ARLA32 AdBlue is a composition of 32.5% high. high purity urea and 67.5% pure deionized water was transparent liquid, with a touch of ammonia odor. If spilled, the water evaporates and the formation of crystals. AdBlue is used with SCR (selective catalytic car exhaust after reduction treatment) car systems, trucks, buses and heavy-duty off-road vehicles using diesel engines, is SCR technology must be used to consumables, together with the SCR catalyst will harmful nitrogen oxide emissions from diesel engines converted into harmless water vapor and nitrogen. The main components of the SCR system comprises a catalyst, AdBlue injection apparatus, AdBlue AdBlue dose container and a controller. Almost all of Europe, the US and Asia, including China's heavy-duty vehicle manufacturers for vehicles equipped with selective catalytic reduction systems and with AdBlue fluid to achieve the new emission standards for nitrogen oxides (such as Euro IV, Euro V) AdBlue and SCR technology under joint action, to optimize engine performance and fuel consumption, reduce diesel fuel consumption can be up to 6%, a significant cost reduction. The average consumption of AdBlue was 5% of the general consumption of diesel, about highway driving consumes 1.5 liters per 100 kilometers. AdBlue can be used only in combination configuration engine SCR system, because it is neither fuel nor fuel additive. AdBlue to perform in line with ISO22241, DIN70070 standard CEFIC regulations and within, in order to ensure the effective operation of the SCR system. AdBlue is not harmful to the environment, and is classified as low-risk transportable liquid. At present, domestic car production is dominated by urea solution small and medium private enterprises, channel sales capability lacking. Domestic vehicle to vehicle production of urea by road rage and other enterprises with urea. Each company with an annual output capacity of between 10-30 million tons. Which KLS, Liaoning Rady capacity of 300,000 tons, etc., and there is a series of patents for car modifiers low solidification problem with urea.