CN107138044A - A kind of diesel vehicle urea liquid with cryogenic property and preparation method thereof - Google Patents
A kind of diesel vehicle urea liquid with cryogenic property and preparation method thereof Download PDFInfo
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- CN107138044A CN107138044A CN201710409586.0A CN201710409586A CN107138044A CN 107138044 A CN107138044 A CN 107138044A CN 201710409586 A CN201710409586 A CN 201710409586A CN 107138044 A CN107138044 A CN 107138044A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a kind of diesel vehicle urea liquid with cryogenic property and preparation method thereof, wherein the diesel vehicle urea liquid with cryogenic property, including following each component：Component A, component B, component C and component D；The component A is high purity water, and component B is urea, and component C is small molecule liquid alcohol amine substance, and component D is small molecule liquid alcohols material；The parts by weight of each component are：5~40 parts of 40~70 parts of component A, 20~35 parts of component B, 5~25 parts of component C and component D.Diesel vehicle urea liquid of the present invention with cryogenic property, products obtained therefrom freezing point is less than 18 DEG C~35 DEG C, and surface tension is less than common urea for vehicle, is adapted to the South and the North each season, especially the Northeast and uses cold season.
Description
Technical field
The invention belongs to diesel motor exhaust process field, used more particularly, to a kind of diesel vehicle with cryogenic property
Urea liquid and preparation method thereof.
Background technology
In recent years, often to the winter is entered, central and east the greater part haze takes place frequently, and haze number of days is universal more than 5 days, and national mist
Overall haze day is in increase trend.Especially nearly 2 years, the haze weather duration is longer, such as, Beijing air day up to standard in 2015
Number be only 186 days, 2016, Beijing air in November number of days up to standard less than 5 into.Haze is to the suspended particulate substance of hundreds of in air
The general statement of content overproof, especially PM2.5 (equivalent aerodynamic diameter is less than or equal to 2.5 microns of particulate matter) is recognized
To be to cause haze weather " arch-criminal ".Research shows that motor vehicle exhaust emission accounts for about the 30% of the national PM2.5 total amount of pollutant,
It is to cause one of China's haze weather " chief culprit ", wherein, the tail gas pollution from heavy-duty diesel vehicle is up to more than 2/3rds.
Data display, the nitrogen oxides and PM pollutants of the emission of diesel engine of Jin Zhan China car ownership 17%, accounts for motor vehicle respectively
The 60% of total emission volumn and more than 90%.To mitigate the pollution that is caused to atmospheric environment of vehicle exhaust, China has carried out in an all-round way state
Four discharge standards.
On May 15th, 2014, State Council's issue《2014-2015 energy-saving and emission-reduction low carbon development action schemes》, it is indicated that arrive
Before the end of the year in 2014, in the national standard derv fuel of supply country four.During 2014 " 11 ", including Jiangsu, Fujian, Sichuan
Multiple provinces Deng including, have all issued the oily popularization policy of respective state four.Ministry of Industry and Information was announced from 1 day January in 2015, national
In the range of diesel vehicle will enforce state IV discharge standards.It is domestic with the promotion and implementation of derv fuel state IV discharge standards
Urea for vehicle market development has welcome new opportunity.Although this market was at the early-stage in recent years, domestic demand has a high potential, car
It can be increased rapidly with urea sales volume.
The main pollutant effulent of Diesel engine is NOx (nitrogen oxides) and PM (particulate), and China is due to national conditions, oil product
Etc. the influence of factor, upgrading state four uses SCR routes.The engine of SCR technology route is taken during burning,
Diesel oil is set fully to burn by technological means so as to reach the target of effectively control PM discharge capacitys, and NOx is then needed in exhaust
During be reduced to nitrogen (N2) and water (H2O), reducing agent is exactly urea for vehicle solution necessary to this process.Tail gas from
Turbocharger enters blast pipe after coming out, and is provided with urea measuring and injecting device on blast pipe, temperature reach 300 DEG C~
Urea liquid is sprayed at 500 DEG C, the urea (NH in the presence of catalyst2CONH2) hydrolysis generation NH3And CO2, NH3It is anti-with NOx
Should, generation nitrogen and water discharge, while absorbing harmful flue gas particle.
The purity and purity requirements of urea for vehicle solution are higher, relative to industrial urea, biuret, insoluble matter, iron, sulphur
The content of compound, chloride etc. has strict requirements.Because metal ion poisoning easily occurs for SCR catalyst carrier so as to lose
Catalytic effect is removed, therefore urea for vehicle solution must use electronics industry one-level ultra-pure water.Current urea for vehicle solution it is general by
32.5% high-purity urea and 67.5% ultra-pure water composition.The urea liquid crystalline temperature of this concentration is minimum, less than -11 DEG C
When can crystallize, can completely be freezed at -20 DEG C in actual use, make it in the north especially under the winter cold snap such as northeast
Use be restricted.The freezing point for adding modifying agent reduction urea for vehicle solution is the method for most convenient and low cost, but by
In SCR catalyst to urea for vehicle solution purity and the high request of cleanliness factor, the metal salt of aqueous solution freezing point can be substantially reduced
It can not use so that the range of choice of modifying agent is very limited, inorganic salts can only select ammonium material substantially, organic modifiers are big
More options amine or amide substance.
Retrieval is found, using urea as ammonia source, and the existing patent for adding modifying agent improvement freezing point is relatively more, but is mostly ammonium class
Material, such as ammonium formate, ammonium carbonate, ammonium hydrogen carbonate, when the content is higher, CO2Detected level it is easily exceeded, and stability is poor, holds
Easily decompose.Chinese publication 201410193227《Motor vehicle exhaust emission purified treatment liquid》In used triethanolamine, but place
The composition for managing liquid is extremely complex, greatly increases process costs and difficulty, and according to the urea for vehicle universal standard, phosphatic detection
Measure (≤0.5) it is also exceeded.Complicated composition very likely easily makes the catalyst poisoning with sensitiveness to influence its reaction to live
Property.
Many patents such as Chinese patent CN201110134706.3《A kind of low temperature urea for vehicle liquid composite》、
CN201110134698.2《A kind of ultralow temperature urea for vehicle liquid composite》、CN201510015958《A kind of low freezing point nitrogen oxygen
Compound reducing agent and preparation method thereof》With CN 201510017530《A kind of ultralow freezing point NOx reducing agent and its preparation side
Method》Small molecule liquid alcohols has all been selected as compound additive, but composition will be complicated with respect to this patent, and increase technique is difficult
Degree.In addition, wherein all containing formamide, formamide has combustibility, in the presence of a catalyst, is heated to less than 35 DEG C, can divide
Solve hypertoxicity hydrogen cyanide, and energy strong corrosion copper, brass, lead, rubber, it has not been convenient to storage and transport.CN201510015958
Vulcanize dirty with also including to produce after organic compounds containing sulfur dimethyl sulfoxide (DMSO), pyrolytic in CN 201510017530
Contaminate thing.This formula is simple because of modifier component, is not introduced into the composition of limited content, therefore every quality index is qualified.
To sum up, the small molecule liquid alcohol amine modifiers used in the present invention are not related to the claim of existing patent, and match somebody with somebody
Side is simple, and effect is notable.
The content of the invention
In view of this, the present invention is directed to propose a kind of diesel vehicle urea liquid with cryogenic property, existing to overcome
The defect of technology, liquid hydramine and liquid Alcoholic modifier are water-miscible, can be miscible with usual organic matter, composition and preparation side
Method is simple, easy to operate, is not introduced into the composition of limited content, every quality index is qualified, adapts to the different regions spring and summer autumn
Early winter and cold season use.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of diesel vehicle urea liquid with cryogenic property, including following each component：Component A, component B, component C
With component D；The component A is high purity water, and component B is urea, and component C is small molecule liquid alcohol amine substance, and component D is small point
Sub- liquid alcohols material.
It is preferred that, the parts by weight of each component are：40~70 parts of component A, 20~35 parts of component B, 5~25 parts of component C
With 5~40 parts of component D.
It is preferred that, the parts by weight of each component are：45~65 parts of component A, 23~30 parts of component B, component C 8~22
Part, 9~35 parts of component D.
It is preferred that, the parts by weight of each component are：50~60 parts of component A, 25~28 parts of component B, component C 13~20
Part, 15~28 parts of component D.
It is preferred that, the component C is monoethanolamine and/or diethanol amine；The content of the component C is 20 parts.
It is preferred that, the component D is more than one or both of methanol, ethanol and ethylene glycol.
The high purity water is technical grade high purity water.
The urea need to meet GB29518-2013《Diesel engine NOx reducing agent aqueous solution of urea (AUS32)》
The technical requirements of the special urea of AUS32 in standard.
The pure water need to meet GB29518-2013《Diesel engine NOx reducing agent aqueous solution of urea (AUS32)》
To the technical requirements of pure water in standard
The small molecule liquid alcohol amine substance and small molecule liquid alcohols material are the product for analyzing pure ratings above.
Monoethanolamine alias 2 hydroxy ethylamine, molecular formula is HO (CH2)2NH2, colourless transparent liquid, with water, methanol, ethanol,
Acetone etc. is miscible, and stability is preferable.Experiment shows, is added in common urea for vehicle after a certain amount of monoethanolamine, solution it is solidifying
Solid point is substantially reduced.To reduce cost, the content of monoethanolamine is unsuitable too high, is advisable with 20%, some low molecules can be added simultaneously
The liquid alcohols of amount.In addition, diethanol amine also can be miscible with water, ethanol etc., it is contemplated that addition one or more of which.
Small molecule liquid alcohols is due to very low freezing point and less density, such as methanol (- 97 DEG C, 0.792g/
cm3), ethanol (- 114 DEG C, 0.798g/cm3), it can make urea liquid that there is lower freezing point and viscosity.But because they have
Stronger volatility, volatile matter is flammable strong, therefore addition can not be excessive.After liquid hydramine compounding, methanol, the volatilization of ethanol
Property substantially weaken, the freezing point for finding solution is determined after placing three months without being decreased obviously.Although ethylene glycol, which be usually used in automobile, prevents
Freeze the preparation of liquid, but density is slightly larger, can increase the viscosity of urea liquid, reduces mobility, should not add excessive.In view of into
Originally preferred methanol in, ready availability, security and viscosity, the present invention, also can select methanol, ethanol, ethylene glycol according to property, effect
In multiple combinations.
Urea for vehicle solution is during being atomized and being injected into the exhaust pipe of engine, and atomizing effect is one very crucial
The problem of.Atomizing effect is good, and the urea low particle size ejected is small, can quickly hydrolyze, be pyrolyzed, into catalyst carrier
Section, be diffused into catalyst surface, absorption, react, NH after reaction3Escape few, reduction NOx efficiency is improved.Atomizing effect is with going back
The surface tension of former agent solution has substantial connection.At room temperature, the surface tension of water is 72mN/m, traditional urea for vehicle solution
It is to be formulated using the urea and water of high-purity, its surface tension reaches more than 66mN/m, and 100% methanol or ethanol are all
In below 25mN/m, ethylene glycol is 50mN/m.It is expected that adding the surface of solution after above-mentioned substance in conventional urea solution
Power inherently declines, and the reducing agent drop ejected is smaller, so as to improve the atomizing effect of urea for vehicle solution.
Electrical conductivity also has certain influence during the use of urea liquid, and electrical conductivity is lower, solution electricity in reaction system
The flowing of lotus is slower, easily causes charge accumulated, forms electrokinetic phenomena, and electrokinetic phenomena height is also easy to produce electric spark to a certain extent,
Vehicle is potentially dangerous.Due to the basic unionization of organic alcohol amine, electrical conductivity very little is added into urea liquid and inevitably resulted in
Its electrical conductivity is reduced.Even if when addition is 20%, compared to the electrical conductivity that one-level industrial electronic water is less than 1 μ S/cm, urea is molten
The electrical conductivity of liquid is still greater than 300 μ S/cm, with higher electric conductivity.
Another object of the present invention is to propose a kind of to prepare the diesel oil urea for vehicle with cryogenic property as described above
The method of solution, to prepare the above-mentioned diesel vehicle urea liquid with cryogenic property.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of method for preparing the diesel vehicle urea liquid as described above with cryogenic property, comprises the following steps：
(1) component B is added in component A, it is fully dissolved, obtain clear solution；
(2) component C and component D are sequentially added in the clear solution described in step (1), is sufficiently stirred for mixing, gained is mixed
Close solution and produce the diesel vehicle urea liquid of the present invention with cryogenic property.
It is preferred that, in the step (2), component C and component D are sequentially added in the clear solution described in step (1), is filled
Divide and stir and evenly mix, the filtering of gained mixed solution produces the diesel vehicle urea liquid of the present invention with cryogenic property.
It is preferred that, in the step (2), after cartridge pressure filtering of the gained mixed solution through 0.5-0.8 μm, 0.6Mpa i.e.
Obtain the diesel vehicle urea liquid of the present invention with cryogenic property.
It is preferred that, in the step (1), component B is added in component A, in making it fully dissolve at 35 DEG C~40 DEG C, obtained
To clear solution；In the step (2), after the clear solution in step (1) is cooled to room temperature, component C is added, component is treated
After C is completely dissolved, component D is added.
Preparation method of the present invention is applied in the preparation of Lab Products lab scale, its preparation process includes following step
Suddenly：
(1) high-purity urea is added and added in the round-bottomed flask of high purity water, after being sealed with grinding port plug, be heated to 35 DEG C~
40 DEG C, stirring to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds small molecule liquid alcohol amine substance, sealed with grinding port plug
Afterwards, stirring to solution is mixed thoroughly.
(3) small molecule liquid alcohols will be added in step (2) resulting solution, is sealed with grinding port plug, stirred complete to solution
It is well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6Mpa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
Preparation method of the present invention is applied in pilot scale and the preparation of commercial prod, its preparation method is：Institute
There is the proportional amplification of raw material, after strong stirring is completely dissolved to urea, sequentially add solid amide substance and small molecule liquid
Alcohols material, strong stirring is to being mixed thoroughly, after cartridge pressure filtering of the obtained solution through 0.5-0.8 μm, 0.6Mpa
Diesel vehicle urea liquid as of the present invention with cryogenic property.
Relative to prior art, a kind of diesel vehicle urea liquid with cryogenic property of the present invention has following
Advantage：
A kind of diesel vehicle urea liquid with cryogenic property of the present invention, its liquid hydramine and liquid alcohols change
Property agent it is water-miscible, can be miscible with usual organic matter, composition and preparation method are simple, easy to operate, are not introduced into limited content
Composition, every quality index is qualified, (reaches ISO 22241-1:2006 international standards, DIN 70070:2005 Germany's marks
The requirement of accurate and DB11/552-2008 Beijing standard), product freezing point is less than -18 DEG C~-35 DEG C, and surface tension is less than common in-vehicle
With urea liquid, atomizing effect is good, with higher electric conductivity, can improve NOx reduction efficiency, is adapted to each season of the South and the North,
Especially the Northeast is used cold season.
The detected level of a kind of diesel vehicle urea liquid with cryogenic property of the present invention, carbonate and chloride
Reach the requirement in the standard of DB11/552-2008 Beijing (due to ISO 22241-1:2006 international standards and DIN 70070:
2005 DINs are not required the detected level of carbonate and chloride, therefore with reference to DB11/552-2008 Beijing standard),
Both detected level is respectively：Carbonate is (with CO2Meter) detected level≤0.2%, chloride detected level≤0.2%.
The method of the preparation diesel vehicle urea liquid as described above with cryogenic property has low temperature with above-mentioned
The diesel vehicle urea liquid of performance has the advantage that identical relative to prior art, will not be repeated here.
Embodiment
In addition to being defined, technical term used has universal with those skilled in the art of the invention in following examples
The identical meanings of understanding.Test reagent used, is routine biochemistry reagent unless otherwise specified in following examples；It is described
Experimental method, is conventional method unless otherwise specified.
The present invention is described in detail with reference to embodiment.
Embodiment 1
(1) the high-purity urea of 4.9376g is added in the round-bottomed flask for having added 10.2411g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 2.5629g monoethanolamines, after being sealed with grinding port plug, magnetic force
Stirring to solution is mixed thoroughly.
(3) 1.1335g methanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -18 DEG C of mixture solution freezing point, surface tension is 70.3mN/m, and electrical conductivity is 555 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 2
(1) the high-purity urea of 5.0335g is added in the round-bottomed flask for having added 10.4505g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 2.626g monoethanolamines, after being sealed with grinding port plug, magnetic force is stirred
Mix to solution and be mixed thoroughly.
(3) 2.6200g methanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) cartridge pressure that step (3) resulting solution is 0.8pm with filtering accuracy is filtered, that is, obtains the tool of the present invention
There is the diesel vehicle urea liquid of cryogenic property.
After measured, -24 DEG C of mixture solution freezing point, surface tension is 65.5mN/m, and electrical conductivity is 449 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 3
(1) the high-purity urea of 5.0342g is added in the round-bottomed flask for having added 10.4476g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 2.6135g monoethanolamines, after being sealed with grinding port plug, magnetic force
Stirring to solution is mixed thoroughly.
(3) 4.4703g methanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -28 DEG C of mixture solution freezing point, surface tension is 60.3mN/m, and electrical conductivity is 380 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 4
(1) the high-purity urea of 4.9765g is added in the round-bottomed flask for having added 10.3377g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 2.5896g monoethanolamines, after being sealed with grinding port plug, magnetic force
Stirring to solution is mixed thoroughly.
(3) 6.898g methanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -32 DEG C of mixture solution freezing point, surface tension is 57.3mN/m, and electrical conductivity is 299 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC work on the diesel engine machine frame of 233 horsepowers of work((discharge capacity 6.5L)
Condition is tested, and under the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 5
(1) the high-purity urea of 10.3200g is added in the round-bottomed flask for having added 21.4329g high purity waters, sealed with grinding port plug
After mouthful, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 5.3551g monoethanolamines, after being sealed with grinding port plug, magnetic force
Stirring to solution is mixed thoroughly.
(3) 5.3610g ethanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -26 DEG C of mixture solution freezing point, surface tension is 54.0mN/m, and electrical conductivity is 316 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 6
(1) the high-purity urea of 9.2948g is added in the round-bottomed flask for having added 19.3036g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 4.8283g monoethanolamines, after being sealed with grinding port plug, magnetic force
Stirring to solution is mixed thoroughly.
(3) 8.2698g ethylene glycol, after being sealed with grinding port plug, magnetic agitation to solution will be added in step (2) resulting solution
It is mixed thoroughly.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -32 DEG C of mixture solution freezing point, surface tension is 63.8mN/m, and electrical conductivity is 470.5 μ S/cm, outside
Sight is as clear as crystal, and product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detection
Amount meets DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 7
(1) the high-purity urea of 11.0341g is added in the round-bottomed flask for having added 22.9221g high purity waters, sealed with grinding port plug
After mouthful, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 5.6311g diethanol amine, after being sealed with grinding port plug, magnetic
Power is stirred to solution and is mixed thoroughly.
(3) 9.8861g methanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -35 DEG C of mixture solution freezing point, surface tension is 55.9mN/m, and electrical conductivity is 183 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 8
(1) the high-purity urea of 9.9590g is added in the round-bottomed flask for having added 20.6847g high purity waters, sealed with grinding port plug
Afterwards, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 5.1768g diethanol amine, after being sealed with grinding port plug, magnetic
Power is stirred to solution and is mixed thoroughly.
(3) 5.1719g ethanol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is complete to solution
It is complete well mixed.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -27 DEG C of mixture solution freezing point, surface tension is 52.7mN/m, and electrical conductivity is 212 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
Embodiment 9
(1) the high-purity urea of 11.6944g is added in the round-bottomed flask for having added 24.2808g high purity waters, sealed with grinding port plug
After mouthful, heating water bath is to 40 DEG C, and magnetic agitation to urea is completely dissolved, the transparent shape of solution；
(2) step (1) resulting solution is cooled to room temperature, adds 6.0732g diethanol amine, after being sealed with grinding port plug, magnetic
Power is stirred to solution and is mixed thoroughly.
(3) 10.4111g ethylene glycol will be added in step (2) resulting solution, after being sealed with grinding port plug, magnetic agitation is to molten
Liquid is mixed thoroughly.
(4) step (3) resulting solution is filtered with the cartridge pressure that filtering accuracy is 0.8pm, 0.6MPa, that is, obtains this hair
The bright diesel vehicle urea liquid with cryogenic property.
After measured, -31 DEG C of mixture solution freezing point, surface tension is 62.3mN/m, and electrical conductivity is 210 μ S/cm, outward appearance
As clear as crystal, product quality indicator meets ISO 22241-I:The requirement of 2006 international standards, and carbonate and chloride detected level
Meet DB11/552-2008 Beijing standard；After Room-temperature seal is stored three months, outward appearance, smell are without the perceptible change of sense organ.
The product of the present embodiment is subjected to ETC, ESC on the diesel engine machine frame of 233 horsepowers of power (discharge capacity 6.5L)
Under working condition measurement, the specified discharge rate of product, after being handled through SCR aftertreatment system, NOx emission can reach state four standard.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of diesel vehicle urea liquid with cryogenic property, it is characterised in that：Including following each component：Component A, group
Divide B, component C and component D；The component A is high purity water, and component B is urea, and component C is small molecule liquid alcohol amine substance, group
It is small molecule liquid alcohols material to divide D.
2. the diesel vehicle urea liquid according to claim 1 with cryogenic property, it is characterised in that：The weight of each component
Measuring number is：5~40 parts of 40~70 parts of component A, 20~35 parts of component B, component C5~25 part and component D.
3. the diesel vehicle urea liquid according to claim 1 with cryogenic property, it is characterised in that：The weight of each component
Measuring number is：45~65 parts of component A, 23~30 parts of component B, component C8~22 part, 9~35 parts of component D.
4. the diesel vehicle urea liquid according to claim 1 with cryogenic property, it is characterised in that：The weight of each component
Measuring number is：50~60 parts of component A, 25~28 parts of component B, component C13~20 part, 15~28 parts of component D.
5. the diesel vehicle urea liquid with cryogenic property according to Claims 1-4 any one, its feature exists
In：The component C is monoethanolamine and/or diethanol amine；The content of the component C is 20 parts.
6. the diesel vehicle urea liquid with cryogenic property according to Claims 1-4 any one, its feature exists
In：The component D is more than one or both of methanol, ethanol and ethylene glycol.
7. a kind of side of the diesel vehicle urea liquid with cryogenic property prepared as described in claim 1 to 6 any one
Method, it is characterised in that：Comprise the following steps：
(1) component B is added in component A, it is fully dissolved, obtain clear solution；
(2) component C and component D are sequentially added in the clear solution described in step (1), is sufficiently stirred for mixing, gained mixing is molten
Liquid produces the diesel vehicle urea liquid of the present invention with cryogenic property.
8. the preparation method of the diesel vehicle urea liquid with cryogenic property described in claim 7, it is characterised in that：It is described
In step (2), component C and component D are sequentially added in the clear solution described in step (1), is sufficiently stirred for mixing, gained mixing
Solution is filtered, and produces the diesel vehicle urea liquid of the present invention with cryogenic property.
9. the preparation method of the diesel vehicle urea liquid according to claim 8 with cryogenic property, it is characterised in that：
In the step (2), gained mixed solution produces of the present invention after the cartridge pressure filtering through 0.5-0.8 μm, 0.6Mpa
Diesel vehicle urea liquid with cryogenic property.
10. the preparation method of the diesel vehicle urea liquid according to claim 7 with cryogenic property, its feature exists
In：In the step (1), component B is added in component A, in making it fully dissolve at 35 DEG C~40 DEG C, clear solution is obtained；
In the step (2), after the clear solution in step (1) is cooled to room temperature, component C is added, treats that component C is completely dissolved
Afterwards, component D is added.
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Effective date of registration: 20210106 Address after: 210033 rooms 501 and 502, building 02, No.1 Kechuang Road, Yaohua street, Qixia District, Nanjing City, Jiangsu Province Patentee after: Jiangsu adelu Environmental Protection Technology Co.,Ltd. Address before: Weidu District Bayi Road Xuchang city Henan province 461000 No. 88 Patentee before: XUCHANG University |