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A kind of production process of vehicle urea containing nano-scale catalyst

A technology of urea for vehicles and a production process, which is applied in the chemical industry, can solve problems such as health and safety threats, toxicity, and environmental hazards, and achieve the effects of optimizing continuous purification processes, fast light-off, and reducing environmental pollution

Active Publication Date: 2020-06-02
山西思淼环保技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Thirdly, the additives of urea products for vehicles are all toxic. After customers use them, they are not only very harmful to the environment, but also pose a certain threat to their own health and safety.

Method used

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  • A kind of production process of vehicle urea containing nano-scale catalyst
  • A kind of production process of vehicle urea containing nano-scale catalyst
  • A kind of production process of vehicle urea containing nano-scale catalyst

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Experimental program
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Embodiment 1

[0019] Embodiment 1, a. prepare catalyst A, get the ammonium metavanadate and oxalic acid of equal mass 50-80g, be dissolved in 1000g deionized water and make solution, add the sodium metaaluminate of 30-40g and stir, in Add 20g of nano-scale WO3 / TiO2 mixture powder during the stirring process, and continue to stir for 2 hours, put it into a temperature-controlled electric furnace at 450 ° C for 1 hour at a high temperature, and then naturally cool to room temperature to obtain Catalyst A.

[0020] b. Catalyst A is stable: Put the prepared catalyst A into the electric furnace again, heat to a high temperature of 650-680°C in a water vapor atmosphere, heat for 30 minutes, and then naturally cool to room temperature.

[0021] c. Preparation of urea solution: at 20-25°C, mix urea and deionized water in parts by weight of 1:2, purify four times to make the insoluble matter less than 2%, add deionized water again to make the concentration of urea solution reach 32%.

[0022] d. Re...

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Abstract

The invention discloses a production process of vehicular urea containing a nano catalyst; the production process has the advantages that through the addition of catalyst A, an optimized continuous purifying process and an ammonia content reduction process, environmental pollution by vehicular urea heavy metals can be effectively solved, efficiency of the vehicular urea to degrade and absorb nitrogen oxides is improved, and low temperature crystallization problem is solved; the catalyst A added herein features high catalytic activity, wide temperature window range, high ignition speed and the like.

Description

technical field [0001] The invention relates to a production process of urea for vehicles containing a nanoscale catalyst, which belongs to the technical field of chemical industry. Background technique [0002] Urea-SCR (Selective Catalytic Reduction) technology has been widely used in Europe and other developed countries and regions as an important means of controlling vehicle diesel engine exhaust emissions due to its advantages of improving fuel consumption and strong resistance to sulfur poisoning. Atmospheric pollution from vehicle exhaust played a major role. At present, although several major domestic vehicle diesel engine companies have carried out research on SCR technology in the field of diesel engines, they are basically based on the introduction and application of foreign technology, and the core technology is still mainly in the hands of relevant foreign manufacturers. And the main bottleneck of the application. [0003] The operating conditions of vehicle d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/94B01D53/56B01J23/30
CPCB01D53/9418B01D2251/2067B01D2258/01B01J23/30B01J35/023
Inventor 薛国军
Owner 山西思淼环保技术开发有限公司
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