1.What are automotive grade urea?
What is automotive grade urea? Liquid automotive urea, also known as Diesel Exhaust Fluid, is a colorless, transparent liquid, first appeared in Europe, it is installed in the urea tank, when the sensor found the nitrogen oxides in the exhaust pipe, it will automatically spray a mist of automotive urea, and nitrogen oxides mixed with the redox reaction occurs in the SCR tank, and ultimately produce uncontaminated nitrogen gas and water discharge.
Diesel exhaust treatment fluid is a concentration of 32.5% and the solvent is ultra-pure water urea aqueous solution, the production of raw materials for automotive grade urea particles and ultra-pure water, the key point is the purity of raw materials. Domestic automotive urea is mainly purified from industrial urea.
2. Automotive grade urea production principle:
(1) at a temperature of 70-75 ℃, the industrial urea in an aqueous solution undergoes hydrolysis.
(2) at a temperature of 30 ℃ below, urea re-crystallized from the aqueous solution.
(3) Each hydrolysis and crystallization, its purity will be greatly improved, generally using the industrial first-class urea hydrolysis and crystallization once, can meet the standard requirements of automotive grade urea particles, the output ratio of 1.5:1. Risso Chemical in order to produce a higher purity of automotive grade urea particles, will be carried out in the second crystallization of the link, the output ratio of 2:1.
From the point of view of production process, the purity of automotive urea granules is much higher than the general industrial demand, and the current production process in China has already met the demand of the international market for practical applications.
3. Automotive Urea Solution Features
In the production of automotive urea solution (diesel exhaust fluid), due to the SCR catalyst carrier is very easy to metal ion poisoning and thus lose the catalytic effect, so the automotive urea solution must be used in the electronics industry, a level of ultra-pure water (resistivity ≥ 18MΩ/cm).
Automotive urea solution will begin to freeze at -11 ℃, the actual use of -20 ℃ will be completely frozen. At present, the international common technology is to prevent the solution from freezing by adding modifiers to lower the freezing point of the solution, and by means of an external heating device.
Automotive urea solution is a high purity urea without any other additives and pure water together with the preparation of the solution, the solution in the automotive grade urea content of 32.5% (mass fraction). Most domestic and foreign heavy-duty diesel engine manufacturers have adopted SCR (selective catalytic reduction) technology to meet the requirements of Euro IV, Euro V motor vehicle emission standards. Select SCR technology must be added to the vehicle urea solution, so that the vehicle to meet the emission standards.
4. Why Choose Automotive Grade Urea
Automotive grade ureais the only type of Urea that meets the ISO 22241 specification and the only suitable Urea for the production of DEF/AUS32/ARLA32 solutions. For meeting the ISO 22241 the Urea granules needs to be of highest purity/quality. We supply high premium-quality Urea and ship our products to our customers on the shortest and most competitive way. This product is used to reduce diesel exhaust pollution in liquid nitrogen oxides, nitrogen oxides into harmless nitrogen and water, reducing toxic exhaust gas emissions and reduce pollution. This product is applicable to all countries IV, V, EuropeIV, EuropeV emission standards for various types of commercial vehicles, automobiles, construction machinery and other large diesel engine SCR systems.
5. How to choose a reasonably priced automotive grade urea
Finding the right balance between quality and cost is critical when choosing automotive grade urea. Choosing the right urea pellet can have a significant impact on the reliability and performance of the Diesel Exhaust Fluid produced. We consider the following aspects: raw material for urea production, detailed parameters, production process, processed purity, homogeneity, after sales and support.
6. AQs(Frequently Asked Questions)
Q1. Do you have MOQ?
A: It depends on different ideas, it can be negotiated.The larger the quantity is, the competitive the unit price will be.
Q2. Should the customer pay the delivery fee? And how much is it?
A: We will send you free samples, and the shipping cost of the samples will be refunded to you when you place an order, or directly deducted from the purchase price.
Q3.How about the after sale service?
A:
(1)We will always keep the quality the same as the buyer’s samples.
(2)We will suggest our packing and take charge in our packing, we will keep the goods
safe in the delivery.
(3)We will trace the goods from the production to selling, and we’re always proactive in solving any problems.
Q4.When can I get a price？
A: We usually quote within 24 hours after we get your inquiry.
Q5: Are you a trade company or manufacturer?
A: We are a professional manufacturer with our own factory.
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