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Automotive urea solution capable of efficiently solving crystallization blockage

A technology of urea and solution for vehicles, which is applied in the preparation of organic compounds, chemical elements of heterogeneous catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve crystallization blockage, high freezing point and non-compliance of tail gas emissions, etc. problem, to achieve the effect of lowering the melting point, reducing the environmental pollution of heavy metals, and improving the conversion rate

Inactive Publication Date: 2021-02-05
HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a vehicle urea solution that efficiently solves crystallization blockage, so as to solve the problem of existing urea NO X Technical problems such as crystallization blockage, high freezing point and non-compliance of tail gas emissions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A urea solution for vehicles efficiently solving crystallization blockage, the urea includes the following components by weight, 13 parts of urea, 5 parts of ethanolamine, 5 parts of simethicone, 6 parts of glycerol, and alkyl glucose 0.5 part of glucoside, 100 parts of ultrapure water, 0.6 part of soot catalytic material, 3.5 parts of silicon type antifreeze; wherein, the preparation method of soot catalytic material is as follows:

[0030] 1) Take La(NO 3 ) 3 •6H 2 O. KNO 3 , Co(NO 3 ) 3 • 6H 2O and Ni(NO 3 ) 3 •6H 2 O, ammonium metavanadate and citric acid are formulated with deionized water to form a solution with a mass fraction of 0.9%, add 0.45 to 0.50% sodium metaaluminate according to the mass of the solution, and add nanoscale WO3 / TiO2 mixture powder during the stirring process, Perform ultrasonic vibration for 20 minutes, put it into a temperature-controlled electric furnace and bake at a high temperature of 550 ° C for 1.5 hours, and th...

Embodiment 2

[0047] Embodiment 2: the difference with embodiment 1 is:

[0048] A urea solution for vehicles that effectively solves crystallization blockage, comprising the following components in parts by weight: 14 parts of urea, 5 parts of ethanolamine, 5 parts of simethicone, 5 parts of glycerol, 0.5 parts of alkyl glucoside, ultrapure water 100 parts, 0.7 parts of soot catalytic material, 4.5 parts of silicon type antifreeze.

[0049] The urea production capacity of the present invention is as high as 2019MTD urea, the utilization rate of NOx conversion rate can reach more than 96.9%, and it does not crystallize at -40°C. The SCR works normally, and the SCR can also meet the requirements when the freezing point of urea is -35°C.

Embodiment 3

[0050] Embodiment 3: the difference with embodiment 1 is: the preparation method of soot catalytic material is as follows:

[0051] 1) Take La(NO 3 ) 3 •6H 2 O. KNO 3 , Co(NO 3 ) 3 • 6H 2O and Ni(NO 3 ) 3 •6H 2 O, ammonium metavanadate and citric acid are prepared with deionized water to form a solution with a mass fraction of 1.0%, add 0.50% sodium metaaluminate according to the mass of the solution, add nanoscale WO3 / TiO2 mixture powder during stirring, and perform ultrasonic Shake for 30 minutes, put it into a temperature-controlled electric furnace and bake at a high temperature of 560 ° C for 1.5 hours, and then naturally cool to room temperature;

[0052] 2) Heat the substance obtained in step 1) at 680°C for 30 minutes, then cool it down to room temperature naturally, and add V at a weight ratio of 1:3 2 o 5 .

[0053] The urea production capacity of the present invention is as high as 2003MTD urea, the utilization rate of NOx conversion rate can reach more t...

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Abstract

The invention discloses a vehicle urea solution for efficiently solving crystallization blockage, which is characterized by comprising the following components in parts by weight: 13-14 parts of urea,5-6 parts of ethanolamine, 4-5 parts of dimethyl silicone oil, 4-6 parts of glycerol, 0.5-1.5 parts of alkyl glucoside, 100 parts of ultrapure water, 0.6-0.7 part of soot catalytic material and 3.5-4.5 parts of a silicon type antifreezing solution. The technical problems that existing urea NOX crystallization is blocked, the freezing point is high, and tail gas emission does not reach the standard are solved.

Description

technical field [0001] The invention relates to the technical field of production of urea solution for vehicles, in particular to a urea solution for vehicles that efficiently solves crystallization blockage. Background technique [0002] Urea for vehicles is suitable for high-purity urea solution of SCR system (Selective Catalytic Reduction System). Under high temperature (above 300°C), the urea solution first decomposes into ammonia gas, and at high temperature, the urea solution gasifies and decomposes to produce NH 3 , under the action of catalyst, NH 3 with NO in the exhaust X The reaction produces harmless H 2 O and N 2 . [0003] However, urea in diesel engines decomposes into NH 3 NO intermediate produced in the process x , NO x It is the general term for all nitrogen oxide compounds, which are extremely harmful to human health. NO x The formed secondary pollutant ozone is also particularly harmful to the human respiratory system, because particulate matter s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94B01D53/56B01J23/888B01J37/08C07C273/04C07C273/16C07C275/00F01N3/20
CPCB01D53/9418B01J23/888B01J23/002B01J37/088B01J37/082C07C273/04C07C273/16F01N3/2066B01D2251/2067B01D2258/012B01J2523/00F01N2610/02B01J35/23B01J2523/13B01J2523/31B01J2523/3706B01J2523/47B01J2523/55B01J2523/69B01J2523/845B01J2523/847C07C275/00Y02P20/141Y02P20/50Y02P20/151Y02A50/20
Inventor 李丰登孙长城桑书梅
Owner HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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