CN104607041B - A kind of ultralow temperature urea for vehicle solution - Google Patents
A kind of ultralow temperature urea for vehicle solution Download PDFInfo
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- CN104607041B CN104607041B CN201410701059.3A CN201410701059A CN104607041B CN 104607041 B CN104607041 B CN 104607041B CN 201410701059 A CN201410701059 A CN 201410701059A CN 104607041 B CN104607041 B CN 104607041B
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Abstract
The invention discloses a kind of ultralow temperature urea for vehicle solution, it is made up of the raw material of following parts by weight：27 31 parts of 75wt% urea liquids, 20 25 parts of ammonium formate, 10 15 parts of propane diols, 34 40 parts of high purity water.Ultralow temperature urea liquid composition of the present invention is simple, and it is convenient to prepare, and the freezing point of ultralow temperature urea liquid is less than 45 DEG C, suitable for northern cold area use in winter, has very high practical value.
Description
Technical field
The invention belongs to vehicle maintenance service solution technique field, and in particular to a kind of ultralow temperature urea for vehicle solution.
Background technology
As China's car ownership is continuously increased, the nitrogen oxides and particulate matter of motor vehicle emission are to human health and air
The harm of environment has caused the concern of height.It is reported that countries in the world are devoted to reduce the research of this two emissions, just
For China, have been carried out " discharge standard of state IV " means that the discharge of vehicle exhaust must use more advanced technology.
Lot of experiments shows, SCR technology（SCR）Be be best suitable for diesel vehicle " state IV " discharge solution, and
This technology must utilize urea liquid to the NO in tail gasXHandled, thus urea for vehicle solution is into " state IV " discharges
The essential product of solution.Urea/SCR technology is passed through again by spraying into a certain amount of aqueous solution of urea, urea into blast pipe
Evaporation, pyrolysis and hydrolytic process obtain reducing agent NH3, NH3It is selective in the presence of catalyst that NOx is reduced to N2, so as to
Realizing reduces NOXDischarge.If not loading diesel engine vent gas treatment fluid or purity not enough or quality being of poor quality, can all occur
Vehicle motor automatic retarding.Meanwhile quality diesel engine vent gas treatment fluid of poor quality can pollute urging in SCR catalytic reactors
Agent, cause serious consequence.
At present, traditional urea for vehicle freezing point is at -11 DEG C or so, it means that using SCR technologies vehicle winter to
North can not run the Shanhai Pass, and this is clearly intolerable such flourishing today for traffic.Solve traditional urea for vehicle to deposit
In the method for problem, typically anti-icing fluid circulating-heating or electrically heated system and guarantor are added with urea system in traditional vehicle
Warm system, that is, the add-on parts such as heating tube loop, temperature sensor, heat-insulation layer are added, not only per car adds about 1200 yuan
Cost, undoubtedly also increase the complexity of system, fault rate is high, in addition, idling of vehicle certain time is needed from winter during car,
Deng engine coolant temperature rise after, the shortcomings of by circulating cooling liquid to melt the urea to have frozen.Therefore, open
It is imperative to send out low freezing point urea for vehicle solution.
The content of the invention
It is an object of the invention to provide a kind of ultralow temperature urea for vehicle solution.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of ultralow temperature urea for vehicle solution, is made up of the raw material of following parts by weight：75wt% urea liquid 27-31 parts, first
Sour ammonium 20-25 parts, propane diols 10-15 parts, high purity water 34-40 parts.
The preparation method of the ultralow temperature urea for vehicle solution：By 75wt% urea liquids, ammonium formate, propane diols and high-purity
Water mixes in proportion, stirring it is complete it is molten after produced through 0.2-0.5 μm of membrane filtration.Preferably, whipping temp is room temperature.
75wt% urea liquids are the urines after flash distillation in the present invention, whole urine production technology are strictly controlled
System, ensureing urine purity, by the use of urine as raw material compared with granular urea, save evaporation and prilling, cost is relatively low, and
The content of biuret is low；Its storage chemical property of ammonium formate is stable, molecular formula NH4HCOO, effective element N content are 21.67
%, NH is resolved at 180 DEG C3And HCOOH/CO+H2O, it can discharge NH for partly replacement urea3Presoma
Composition, it can normally be decomposed in the range of engine exhaust temperature without staying residue；Propane diols, nontoxic, 187.3 DEG C of boiling point, energy
Miscible, the good freezing protection effect with the multi-solvents such as water, ethanol, ether, chloroform, acetone, stability are high；The purity of high purity water is higher,
Micro-content organism, chlorion and metal ion in water are all the hazardous materials of SCR post-processing catalysts, this high purity water water quality
The μ s/cm of electrical conductivity ＜ 0.06.
Preferably, the purity of ammonium formate and propane diols is that analysis is pure.
Ultralow temperature urea liquid composition of the present invention is simple, and it is convenient to prepare, and the freezing point of ultralow temperature urea liquid is less than -45 DEG C,
Suitable for northern cold area use in winter, there is very high practical value.
Embodiment
With reference to embodiment, the present invention is described further, but protection scope of the present invention is not limited to that.
Embodiment 1
Choose 27 parts of 75wt% urea liquids, 25 parts of analytically pure ammonium formate, 12 parts of analytically pure propane diols, high purity water 36
Part；Room temperature（25℃）Stirring to it is complete it is molten after, be the automobile-used urine of ultralow temperature of the present invention after via hole diameter is 0.5 μm of membrane filtration
Plain solution.After measured, -45 DEG C of ultralow temperature urea for vehicle freezing point of solution, tasteless, clear appearance is transparent, density 1.089g/cm3,
Biuret Content 0. 02%, impurity content meet standard requirement, the requirement of plastic compatible sexual satisfaction；Room temperature（25℃）Storage
After depositing 48h, outward appearance, smell are qualified without the perceptible change of sense organ, performance indications detection.
ESC working condition measurements, the automobile-used urine of ultralow temperature of the invention are carried out on the diesel engine machine frame that discharge capacity is 8.6 liters
Plain solution is under specified discharge rate, after the processing of SCR preprocessors, NOXDischarge can reach state 4 and require.
Embodiment 2
Choose 28 parts of 75wt% urea liquids, 24 parts of analytically pure ammonium formate, 14 parts of analytically pure propane diols, high purity water 34
Part；Room temperature（28℃）Stirring to it is complete it is molten after, be the automobile-used urine of ultralow temperature of the present invention after via hole diameter is 0.5 μm of membrane filtration
Plain solution.After measured, -47 DEG C of ultralow temperature urea for vehicle freezing point of solution, tasteless, clear appearance is transparent, density 1.091g/cm3,
Biuret Content 0. 02%, impurity content meet standard requirement, the requirement of plastic compatible sexual satisfaction；Room temperature（28℃）Storage
After depositing 48h, outward appearance, smell are qualified without the perceptible change of sense organ, performance indications detection.
ESC working condition measurements, the automobile-used urine of ultralow temperature of the invention are carried out on the diesel engine machine frame that discharge capacity is 8.6 liters
Plain solution is under specified discharge rate, after the processing of SCR preprocessors, NOXDischarge can reach state 4 and require.
Embodiment 3
Choose 30 parts of 75wt% urea liquids, 21 parts of analytically pure ammonium formate, 13 parts of analytically pure propane diols, high purity water 36
Part；Room temperature（23℃）Stirring to it is complete it is molten after, be the automobile-used urine of ultralow temperature of the present invention after via hole diameter is 0.2 μm of membrane filtration
Plain solution.After measured, -50 DEG C of ultralow temperature urea for vehicle freezing point of solution, tasteless, clear appearance is transparent, density 1.090g/cm3,
Biuret Content 0. 02%, impurity content meet standard requirement, the requirement of plastic compatible sexual satisfaction；Room temperature（23℃）Storage
After depositing 48h, outward appearance, smell are qualified without the perceptible change of sense organ, performance indications detection.
ESC working condition measurements, the automobile-used urine of ultralow temperature of the invention are carried out on the diesel engine machine frame that discharge capacity is 8.6 liters
Plain solution is under specified discharge rate, after the processing of SCR preprocessors, NOXDischarge can reach state 4 and require.
Embodiment 4
Choose 31 parts of 75wt% urea liquids, 20 parts of analytically pure ammonium formate, 10 parts of analytically pure propane diols, high purity water 39
Part；Room temperature（25℃）Stirring to it is complete it is molten after, be the automobile-used urine of ultralow temperature of the present invention after via hole diameter is 0.3 μm of membrane filtration
Plain solution.After measured, -46 DEG C of ultralow temperature urea for vehicle freezing point of solution, tasteless, clear appearance is transparent, density 1.088g/cm3,
Biuret Content 0. 03%, impurity content meet standard requirement, the requirement of plastic compatible sexual satisfaction；Room temperature（25℃）Storage
After depositing 48h, outward appearance, smell are qualified without the perceptible change of sense organ, performance indications detection.
ESC working condition measurements, the automobile-used urine of ultralow temperature of the invention are carried out on the diesel engine machine frame that discharge capacity is 8.6 liters
Plain solution is under specified discharge rate, after the processing of SCR preprocessors, NOXDischarge can reach state 4 and require.
Claims (6)
1. a kind of ultralow temperature urea for vehicle solution, it is characterised in that be made up of the raw material of following parts by weight：75wt% urea liquids
27 ~ 31 parts, 20 ~ 25 parts of ammonium formate, 10 ~ 15 parts of propane diols, 34 ~ 40 parts of high purity water.
2. ultralow temperature urea for vehicle solution as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：
27 parts of 75wt% urea liquids, 25 parts of ammonium formate, 12 parts of propane diols, 36 parts of high purity water.
3. ultralow temperature urea for vehicle solution as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：
28 parts of 75wt% urea liquids, 24 parts of ammonium formate, 14 parts of propane diols, 34 parts of high purity water.
4. ultralow temperature urea for vehicle solution as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：
30 parts of 75wt% urea liquids, 21 parts of ammonium formate, 13 parts of propane diols, 36 parts of high purity water.
5. ultralow temperature urea for vehicle solution as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：
31 parts of 75wt% urea liquids, 20 parts of ammonium formate, 10 parts of propane diols, 39 parts of high purity water.
6. the preparation method of the ultralow temperature urea for vehicle solution described in any one of claim 1 ~ 5, it is characterised in that including following
Step：It is through 0.2 ~ 0.5 μm of membrane filtration after 75wt% urea liquids, ammonium formate, propane diols and high purity water are well mixed
.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110394058A (en) * | 2018-08-22 | 2019-11-01 | 山西思淼环保技术开发有限公司 | A kind of urea for vehicle and preparation method thereof that will not be crystallized |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105056738B (en) * | 2015-08-18 | 2017-07-21 | 安阳化学工业集团有限责任公司 | A kind of production technology of urea for vehicle solution |
| CN106039996B (en) * | 2016-06-28 | 2018-11-23 | 许江煌 | A kind of urea for vehicle and preparation method thereof |
| CN106064020B (en) * | 2016-06-28 | 2018-10-23 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN107138044B (en) * | 2017-06-02 | 2020-06-23 | 许昌学院 | Diesel vehicle urea solution with low-temperature performance and preparation method thereof |
| CN107178408A (en) * | 2017-06-02 | 2017-09-19 | 许昌学院 | A kind of ultralow temperature diesel vehicle urea liquid and preparation method thereof |
| CN108404665A (en) * | 2018-02-02 | 2018-08-17 | 杨耀辉 | Automobile urea liquid and preparation method thereof |
| CN108261922A (en) * | 2018-04-09 | 2018-07-10 | 薛向东 | A kind of preparation method of low temperature resistant urea for vehicle solution |
| CN109078497A (en) * | 2018-08-22 | 2018-12-25 | 长春盛恒环保科技有限公司 | A kind of purifying vehicle exhaust treatment fluid and preparation method thereof |
| CN110394059A (en) * | 2018-08-22 | 2019-11-01 | 山西思淼环保技术开发有限公司 | - 25 DEG C of antifreeze urea for vehicle of one kind and preparation method thereof |
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| FR2936844A1 (en) * | 2008-10-02 | 2010-04-09 | Inergy Automotive Systems Res | ROTARY PUMP FOR VEHICLE |
| CN101695669A (en) * | 2009-09-10 | 2010-04-21 | 北京益利精细化学品有限公司 | Method for preparing urea catalytic liquid for vehicle |
| EP2703077A4 (en) * | 2011-04-28 | 2014-11-05 | N E Chemcat Corp | Off gas purification device |
| CN102213126B (en) * | 2011-05-24 | 2013-02-06 | 辽宁润迪精细化工有限公司 | Low-temperature urea reducing agent composition |
| CN102806011A (en) * | 2011-06-03 | 2012-12-05 | 中国石油化工股份有限公司 | Method for preparing automobile urea liquid reducing agent |
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| CN110394058A (en) * | 2018-08-22 | 2019-11-01 | 山西思淼环保技术开发有限公司 | A kind of urea for vehicle and preparation method thereof that will not be crystallized |
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Denomination of invention: Ultra-low temperature urea solution used for vehicle Effective date of registration: 20191012 Granted publication date: 20180209 Pledgee: Zhumadian Rural Commercial Bank Co., Ltd. Pledgor: HENAN HONGKANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Registration number: Y2019980000249 |
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Date of cancellation: 20200522 Granted publication date: 20180209 Pledgee: Zhumadian Rural Commercial Bank Co., Ltd. Pledgor: HENAN HONGKANG ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2019980000249 |
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