CN109078497A - A kind of purifying vehicle exhaust treatment fluid and preparation method thereof - Google Patents
A kind of purifying vehicle exhaust treatment fluid and preparation method thereof Download PDFInfo
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- CN109078497A CN109078497A CN201810961189.9A CN201810961189A CN109078497A CN 109078497 A CN109078497 A CN 109078497A CN 201810961189 A CN201810961189 A CN 201810961189A CN 109078497 A CN109078497 A CN 109078497A
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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
-
- 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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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of purifying vehicle exhaust treatment fluids, are grouped as by the group of following parts by weight: urea liquid 35-55 parts by weight, methanol 10-30 parts by weight, 10 parts by weight of 25 parts by weight of propylene glycol and water.Meanwhile the present invention also provides the preparation methods of the purifying vehicle exhaust treatment fluid.Ultra-low-temperature diesel vehicle vent gas treatment liquid composition of the present invention is simple, and preparation is convenient, and not only cost price is cheap, and the solvent used is all to use commercially available common solvent, and solution no pollution to the environment itself is very environmentally friendly.It is highly suitable for north cold area use in winter, there is very high use value.
Description
Technical field
It is specifically a kind of to be suitable for automotive Diesel engine tail gas the present invention relates to motor vehicle exhaust emission processing technology field
Purified treatment liquid of discharge and preparation method thereof.
Background technique
With being continuously increased for China's car owning amount, the oxynitrides and particulate matter of motor vehicle emission to human health and
The harm of atmospheric environment has caused the concern of height.The nitrogen oxides of car combustion engine discharge is mostly nitric oxide
It (NO), is nitrogen dioxide (NO on a small quantity2), generally use oxynitrides (NOx) indicate.NO is colourless gas, toxicity itself is little,
But it is slowly oxidized to NO in an atmosphere2.NO2 is brown gas, has strong impulse taste, is combined into after being inhaled into human body with water
Nitric acid causes cough, asthma or even pulmonary emphysema and impatient damage.NOxIt is to form the photochemistry containing toxic ozone in Near Ground
One of principal element of smog.It is reported that countries in the world are devoted to reduce the research of this two emissions, for China,
" state V " discharge standard having been carried out means that the discharge of vehicle exhaust must use more advanced technology.Many experiments are ground
Study carefully and shows that SCR technology (SCR) is to be most suitable for diesel vehicle " state V " discharge solution, and this technology must
It must be using urea liquid to NO in tail gasXIt is handled, therefore, urea for vehicle solution must at " state V " discharge solution
Standby product.Urea/SCR technology is by spraying into a certain amount of aqueous solution of urea into exhaust pipe, and urea is using evaporation, pyrolysis
Reducing agent NH is obtained with hydrolytic process3, NH3Under the effect of the catalyst will selectivity by NOXIt is reduced to N2, to realize
Reduce NOXThe purpose of discharge.If carrying diesel engine not filling vent gas treatment liquid or load the treatment fluid that purity is not high, quality is of poor quality,
Will making vehicle motor, there is a situation where automatic retardings.Meanwhile quality diesel engine vent gas treatment fluid of poor quality can pollute SCR
Catalyst in catalytic reactor, causes serious consequence.
Currently, traditional urea for vehicle freezing point is at -11 DEG C or so, it means that using SCR technology vehicle winter to
North cannot cross one line of the Shanhai Pass, this is clearly intolerable for traffic so flourishing today.Solve the automobile-used urine of tradition
Element method of problems, typically the automobile-used urea system of tradition add anti-icing fluid circulating-heating or electrically heated system with
And heat-insulation system, that is, increase the add-on parts such as heating tube loop, temperature sensor, insulating layer, which not only adds every
The cost (about 1200 yuan) of vehicle, and the complexity of system is also increased, cause failure rate to increase.In addition, from winter when vehicle
Idling of vehicle certain time is needed, after needing the temperature of engine coolant to rise, is melted by circulating cooling liquid
The disadvantages of urea of icing.Therefore, it is imperative to develop ultralow freezing point urea for vehicle solution.
Summary of the invention
Defect and demand based on the prior art, the present invention provides a kind of purifying vehicle exhaust treatment fluids of ultralow freezing point
And preparation method thereof.
The present invention provides a kind of purifying vehicle exhaust treatment fluids, are grouped as by the group of following parts by weight: urea liquid 35-
55 parts by weight, methanol 10-30 parts by weight, 10 parts by weight of 25 parts by weight of propylene glycol and water.
Ultra-low-temperature diesel vehicle vent gas treatment liquid composition of the present invention is simple, and preparation is convenient, and not only cost price is cheap, uses
Solvent is all to use commercially available common solvent, and solution no pollution to the environment itself is very environmentally friendly.It is highly suitable for northern cold
Cryogenic region use in winter has very high use value.
In an embodiment according to the present invention, the urea liquid is made of urea and water, wherein the matter of urea
Measuring score is 32.5%.
Optimal clean-up effect can be obtained using the urea that mass fraction is 32.5%.
In an embodiment according to the present invention, by 35 parts by weight of urea liquid, 30 parts by weight of analytically pure methanol,
Analytically pure 25 parts by weight of propylene glycol, 10 parts by weight of high purity water composition.
In an embodiment according to the present invention, by 55 parts by weight of urea liquid, molten 10 weight of analytically pure methanol
Part, 25 parts by weight of analytically pure propylene glycol, 10 parts by weight of high purity water composition.
In an embodiment according to the present invention, by 60 parts by weight of urea liquid, 10 parts by weight of analytically pure methanol,
Analytically pure 25 parts by weight of propylene glycol, 5 parts by weight of high purity water composition.
In an embodiment according to the present invention, by 45 parts by weight of urea liquid, 20 parts by weight of analytically pure methanol,
Analytically pure 25 parts by weight of propylene glycol, 10 parts by weight of high purity water composition.
The present invention also provides the preparation methods of above-mentioned purifying vehicle exhaust treatment fluid, comprising:
The urea liquid of appropriate parts by weight, methanol, propylene glycol and water are mixed, mixed solution is stirred to whole dissolutions,
To obtain the final product.
The present invention is a kind of to be mixed with to obtain the diesel oil of low-temperature resistance by certain proportion with the cheap several solvents of environmental protection
Tail gas treatment fluid can adapt to northern cold use in winter.Alcohols solvent can be miscible with water, common organic matter, preparation side
Method is simple, easy to operate.
In an embodiment according to the present invention, mixing is stirred at room temperature in the mixed solution.
In an embodiment according to the present invention, the temperature that the mixed solution is stirred is 22-28 DEG C
In an embodiment according to the present invention, the temperature is 25 DEG C.
Specific embodiment
It is described below and specific embodiments of the present invention is fully shown, to enable those skilled in the art to practice
They.Embodiment only represents possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and is grasped
The sequence of work can change.The part of some embodiments and feature can be included in or replace the part of other embodiments
And feature.The range of embodiment of the present invention includes the entire scope of claims and all of claims can
The equivalent of acquisition.Herein, each embodiment can individually or generally be indicated that this is only with term " invention "
For convenience, and if in fact disclosing the invention more than one, the range for being not meant to automatically limit the application is to appoint
What single invention or inventive concept.Herein, relational terms such as first and second and the like are used only for an entity
Perhaps operation is distinguished with another entity or operation without requiring or implying that there are any between these entities or operation
Actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that process, method or equipment including a series of elements not only include those elements, but also including not having
The other element being expressly recited.Each embodiment herein is described in a progressive manner, and each embodiment stresses
It is the difference from other embodiments, the same or similar parts in each embodiment may refer to each other.
Embodiment 1
Take 32.5% 45 parts by weight of urea liquid, 20 parts by weight of analytically pure methanol, 25 weight of analytically pure propylene glycol
Part, 10 parts by weight of high purity water；Be stirred at room temperature to it is complete it is molten after, can be obtained ultra-low-temperature diesel vehicle vent gas treatment liquid of the invention.Through
Measurement, -35 DEG C of freezing point of solution of ultralow temperature urea for vehicle, tasteless, clear appearance is transparent, and impurity content is complied with standard and wanted
It asks, Compatibility in Plastics is met the requirements；After room temperature storage 48h, appearance, smell are without the perceptible variation of sense organ, performance indicator detection
It is qualified.
Embodiment 2
Take 32.5% 35 parts by weight of urea liquid, 30 parts by weight of analytically pure methanol, 25 weight of analytically pure propylene glycol
Part, 10 parts by weight of high purity water；22 DEG C) stirring to it is complete it is molten after, can be obtained ultra-low-temperature diesel vehicle vent gas treatment liquid of the invention.Through
Measurement, -25 DEG C of freezing point of ultra-low-temperature diesel vehicle vent gas treatment liquid, tasteless, clear appearance is transparent, and impurity content meets mark
Alignment request, Compatibility in Plastics are met the requirements；After 25 DEG C of storage 48h, appearance, smell are without the perceptible variation of sense organ, performance indicator
Detection is qualified.
Embodiment 3
Take 32.5% 55 parts by weight of urea liquid, 10 parts by weight of analytically pure methanol, 25 weight of analytically pure propylene glycol
Part, 10 parts by weight of high purity water；28 DEG C of stirrings to it is complete it is molten after, can be obtained ultra-low-temperature diesel vehicle vent gas treatment liquid of the invention.Through
Measurement, -45 DEG C of freezing point of solution of ultralow temperature urea for vehicle, tasteless, clear appearance is transparent, and impurity content is complied with standard and wanted
It asks, Compatibility in Plastics is met the requirements；After room temperature storage 48h, appearance, smell are without the perceptible variation of sense organ, performance indicator detection
It is qualified.
Embodiment 4
Take 32.5% 60 parts by weight of urea liquid, 10 parts by weight of analytically pure methanol, 25 weight of analytically pure propylene glycol
Part；5 parts by weight of high purity water；25 DEG C of stirrings to it is complete it is molten after, can be obtained ultra-low-temperature diesel vehicle vent gas treatment liquid of the invention.Through surveying
Fixed, -50 DEG C of freezing point of solution of ultralow temperature urea for vehicle, tasteless, clear appearance is transparent, and impurity content is met the requirements of the standard,
Compatibility in Plastics is met the requirements；After 25 DEG C of storage 48h, without the perceptible variation of sense organ, performance indicator detection is closed for appearance, smell
Lattice.
Comparative example 1
1) 14.5459g high line urea is mixed with 30.3884g high purity water, heating water bath is to 40 DEG C after closed container, magnetic
Power is stirred to being completely dissolved；
2) after solution is cooled to room temperature, 16.1716g n,N-Dimethylformamide is added, closed container is uniformly mixed；
3) mixed solution for obtaining step 2) with 0.8pm cartridge pressure filter to get.
It is surveyed according to the method for HJ 451-2008 " environmental protection product technical requirements diesel engine truck exhaust after-treatment device "
Examination, while detecting its performance at low temperature.
Reference substance uses concentration to be not added with other reducing agents for 33.3wt%, can reach oxynitrides in 341 DEG C and turns
Rate 94%.
The comparison of 1 oxynitrides conversion ratio of table
By 1 comparative test of table it is found that crystallization just occurs at -30 DEG C for purified treatment liquid of the invention, and in normal room
Its lower nitrogen oxygen transformation efficiency of temperature and the conversion ratio for being not less than reference substance, and it is suitable with the conversion ratio of comparative example.And it is of the invention
Purified treatment liquid phase is for comparative example, and preparation is easier, and cost is less expensive.On the other hand, purified treatment liquid of the invention is -20
Higher conversion ratio can still be maintained in a low temperature of DEG C, and nitrogen oxygen conversion ratio is higher than the nitrogen oxygen conversion ratio of comparative example, and compares
Product can not carry out nitrogen oxygen conversion due to icing again.
Understand, the invention is not limited to being described above and process and structure shown in, and can be with
It is carrying out various modifications and is changing without departing from the scope.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of purifying vehicle exhaust treatment fluid, which is characterized in that be grouped as by the group of following parts by weight: urea liquid 35-55
Parts by weight, methanol 10-30 parts by weight, 10 parts by weight of 25 parts by weight of propylene glycol and water.
2. purifying vehicle exhaust treatment fluid as described in claim 1, which is characterized in that the urea liquid is by urea and water group
At, wherein the mass fraction of urea is 32.5%.
3. purifying vehicle exhaust treatment fluid as claimed in claim 1 or 2, which is characterized in that by 35 parts by weight of urea liquid, divide
Analyse pure 30 parts by weight of methanol, 25 parts by weight of analytically pure propylene glycol, 10 parts by weight of high purity water composition.
4. purifying vehicle exhaust treatment fluid as claimed in claim 1 or 2, it is characterised in that, by 55 parts by weight of urea liquid, divide
Analyse molten 10 parts by weight of pure methanol, 25 parts by weight of analytically pure propylene glycol, 10 parts by weight of high purity water composition.
5. purifying vehicle exhaust treatment fluid as claimed in claim 1 or 2, which is characterized in that by 60 parts by weight of urea liquid, divide
Analyse pure 10 parts by weight of methanol, 25 parts by weight of analytically pure propylene glycol, 5 parts by weight of high purity water composition.
6. purifying vehicle exhaust treatment fluid as claimed in claim 1 or 2, which is characterized in that by 45 parts by weight of urea liquid, divide
Analyse pure 20 parts by weight of methanol, 25 parts by weight of analytically pure propylene glycol, 10 parts by weight of high purity water composition.
7. such as the preparation method of purifying vehicle exhaust treatment fluid of any of claims 1-6, which is characterized in that packet
It includes:
By the urea liquid of appropriate parts by weight, methanol, propylene glycol and water mix, by mixed solution stir to all dissolution to get.
8. preparation method as claimed in claim 7, which is characterized in that mixing is stirred at room temperature in the mixed solution.
9. preparation method as claimed in claim 7, which is characterized in that the temperature that the mixed solution is stirred is 22-28
℃。
10. preparation method as claimed in claim 9, which is characterized in that the temperature is 25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961189.9A CN109078497A (en) | 2018-08-22 | 2018-08-22 | A kind of purifying vehicle exhaust treatment fluid and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810961189.9A CN109078497A (en) | 2018-08-22 | 2018-08-22 | A kind of purifying vehicle exhaust treatment fluid and preparation method thereof |
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| CN109078497A true CN109078497A (en) | 2018-12-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908755A (en) * | 2019-04-11 | 2019-06-21 | 兰州梓苑环保科技有限公司 | A kind of vent gas treatment liquid and preparation method thereof suitable for -25 DEG C of environment |
| CN111939739A (en) * | 2020-08-24 | 2020-11-17 | 山东欧蓝素汽车环保科技有限公司 | Low-temperature applicable automobile urea solution and preparation method thereof |
| CN112879130A (en) * | 2021-03-29 | 2021-06-01 | 长春盛恒环保科技有限公司 | Novel automobile exhaust purification treatment liquid and preparation method thereof |
| WO2021198579A1 (en) * | 2020-03-30 | 2021-10-07 | Totalenergies Marketing Services | Use of a composition for removing pollutants from exhaust gases produced by heat engines |
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| JP2000026834A (en) * | 1998-07-13 | 2000-01-25 | Hino Motors Ltd | Reducing agent composition for cleaning exhaustion gas from internal combustion engine |
| WO2000030733A1 (en) * | 1998-11-23 | 2000-06-02 | Mobil Oil Corporation | Liquid urea exhaust gas treatment additive |
| US20090031713A1 (en) * | 2007-08-02 | 2009-02-05 | Denso Corporation | Antifreezing urea solution for urea scr system and urea scr system using the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908755A (en) * | 2019-04-11 | 2019-06-21 | 兰州梓苑环保科技有限公司 | A kind of vent gas treatment liquid and preparation method thereof suitable for -25 DEG C of environment |
| WO2021198579A1 (en) * | 2020-03-30 | 2021-10-07 | Totalenergies Marketing Services | Use of a composition for removing pollutants from exhaust gases produced by heat engines |
| CN111939739A (en) * | 2020-08-24 | 2020-11-17 | 山东欧蓝素汽车环保科技有限公司 | Low-temperature applicable automobile urea solution and preparation method thereof |
| CN112879130A (en) * | 2021-03-29 | 2021-06-01 | 长春盛恒环保科技有限公司 | Novel automobile exhaust purification treatment liquid and preparation method thereof |
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Application publication date: 20181225 |