CN104607041A - Ultra-low temperature urea solution used for vehicle - Google Patents
Ultra-low temperature urea solution used for vehicle Download PDFInfo
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- CN104607041A CN104607041A CN201410701059.3A CN201410701059A CN104607041A CN 104607041 A CN104607041 A CN 104607041A CN 201410701059 A CN201410701059 A CN 201410701059A CN 104607041 A CN104607041 A CN 104607041A
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Abstract
The invention discloses an ultra-low temperature urea solution uses for a vehicle. The urea solution is prepared from the following raw materials by weight: 27 to 31 parts of a 75 wt% urea solution, 20 to 25 parts of ammonium formate, 10 to 15 parts of propylene glycol and 34 to 40 parts of high-purity water. The ultra-low temperature urea solution provided by the invention is simple in composition and convenient in preparation, has a freezing point lower than -45 DEG C, is applicable to northern cold areas in winter in and has high practical value.
Description
Technical field
The invention belongs to vehicle maintenance service solution technique field, be specifically related to a kind of ultralow temperature urea for vehicle solution.
Background technology
Along with China's automobile pollution constantly increases, the nitrogen oxide of motor vehicle emission and the harm of particle to human health and atmospheric environment have caused concern highly.It is reported, the research reducing these two emissions is all devoted in countries in the world, and with regard to China, " state IV " discharge standard implemented means that the discharge of vehicle exhaust must adopt more advanced technology.Lot of experiments shows, SCR technology (SCR) is best suited for " state IV " discharge solution of diesel vehicle, and this technology must utilize urea liquid to the NO in tail gas
xprocess, thus urea for vehicle solution has become " state IV " to discharge the essential product of solution.Urea SCR technology by spraying into a certain amount of aqueous solution of urea in blast pipe, and urea obtains reducing agent NH through pervaporation, pyrolysis and hydrolytic process again
3, NH
3under the effect of catalyst, optionally NOx is reduced to N
2, thus realize reducing NO
xdischarge.If do not load diesel engine vent gas treatment fluid or purity not or quality of poor quality, all can there is vehicle motor automatic retarding.Meanwhile, quality diesel engine vent gas treatment fluid of poor quality can pollute the catalyst in SCR catalytic reactor, causes serious consequence.
At present, traditional urea for vehicle freezing point is all at about-11 DEG C, and this means to use the vehicle of SCR technology can not run the Shanhai Pass northwards winter, this is obviously intolerable for today that traffic is so flourishing.Solve the in-problem method of traditional urea for vehicle, general is all add anti-icing fluid circulating-heating or electrically heated system and heat-insulation system at traditional vehicle urea system, namely the add-on parts such as heating tube loop, temperature sensor, heat-insulation layer are added, not only per car adds the cost of about 1200 yuan, too increase the complexity of system undoubtedly, fault rate is high, in addition, idling of vehicle certain hour is needed during cycling start in winter, after temperature rising Deng engine coolant, circulating cooling liquid is relied on to melt the shortcomings such as the urea frozen.Therefore, low freezing point urea for vehicle solution is developed imperative.
Summary of the invention
The object of the present invention is to provide a kind of ultralow temperature urea for vehicle solution.
For achieving the above object, the present invention adopts following technical scheme:
A kind of ultralow temperature urea for vehicle solution, is made up of the raw material of following weight portion: 75wt% urea liquid 27-31 part, ammonium formate 20-25 part, propane diols 10-15 part, high purity water 34-40 part.
The preparation method of described ultralow temperature urea for vehicle solution: 75wt% urea liquid, ammonium formate, propane diols and high purity water are mixed in proportion, stir entirely molten after through 0.2-0.5 μm membrane filtration and get final product.Preferably, whipping temp is room temperature.
In the present invention 75wt% urea liquid be flash distillation after urine, strictly to control whole urine production technology, ensure urine purity, with urine as raw material compared with granular urea, save evaporation and prilling, cost is lower, and the content of biuret is low; Its storage stable chemical nature of ammonium formate, molecular formula is NH
4hCOO, effective element N content is 21.67 %, at 180 DEG C, resolve into NH
3and HCOOH/CO+H
2o, what can be used for Some substitute urea can discharge NH
3presoma composition, can normally decompose within the scope of engine exhaust temperature and not stay residue; Propane diols, nontoxic, boiling point 187.3 DEG C, can be miscible with multi-solvents such as water, ethanol, ether, chloroform, acetone, good freezing protection effect, and stability is high; The purity of high purity water is higher, and the micro-content organism in water, chlorion and metal ion are all the hazardous materials of SCR post-processing catalyst, this high purity water water electric conductivity < 0.06 μ s/cm.
Preferably, the purity of ammonium formate and propane diols be analyze pure.
Ultralow temperature urea liquid composition of the present invention is simple, and easy to prepare, the freezing point of ultralow temperature urea liquid, lower than-45 DEG C, is applicable to northern cold area use in winter, has very high practical value.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further, but protection scope of the present invention is not limited in this.
embodiment 1
Choose 75wt% urea liquid 27 parts, analytically pure ammonium formate 25 parts, analytically pure propane diols 12 parts, high purity water 36 parts; Room temperature (25 DEG C) be stirred to entirely molten after, via hole diameter is after the membrane filtration of 0.5 μm, is ultralow temperature urea for vehicle solution of the present invention.After measured, ultralow temperature urea for vehicle freezing point of solution-45 DEG C, tasteless, clear appearance is transparent, and density is 1.089g/cm
3, Biuret Content 0. 02%, impurity content all meets standard-required, and Compatibility in Plastics meets the demands; After room temperature (25 DEG C) stores 48h, outward appearance, smell are without the perceptible change of sense organ, and it is all qualified that performance indications detect.
Be that the diesel engine machine frame of 8.6 liters carries out ESC working condition measurement in discharge capacity, ultralow temperature urea for vehicle solution of the present invention under specified discharge rate, after the process of SCR preprocessor, NO
xdischarge can reach state 4 requirement.
embodiment 2
Choose 75wt% urea liquid 28 parts, analytically pure ammonium formate 24 parts, analytically pure propane diols 14 parts, high purity water 34 parts; Room temperature (28 DEG C) be stirred to entirely molten after, via hole diameter is after the membrane filtration of 0.5 μm, is ultralow temperature urea for vehicle solution of the present invention.After measured, ultralow temperature urea for vehicle freezing point of solution-47 DEG C, tasteless, clear appearance is transparent, and density is 1.091g/cm
3, Biuret Content 0. 02%, impurity content all meets standard-required, and Compatibility in Plastics meets the demands; After room temperature (28 DEG C) stores 48h, outward appearance, smell are without the perceptible change of sense organ, and it is all qualified that performance indications detect.
Be that the diesel engine machine frame of 8.6 liters carries out ESC working condition measurement in discharge capacity, ultralow temperature urea for vehicle solution of the present invention under specified discharge rate, after the process of SCR preprocessor, NO
xdischarge can reach state 4 requirement.
embodiment 3
Choose 75wt% urea liquid 30 parts, analytically pure ammonium formate 21 parts, analytically pure propane diols 13 parts, high purity water 36 parts; Room temperature (23 DEG C) be stirred to entirely molten after, via hole diameter is after the membrane filtration of 0.2 μm, is ultralow temperature urea for vehicle solution of the present invention.After measured, ultralow temperature urea for vehicle freezing point of solution-50 DEG C, tasteless, clear appearance is transparent, and density is 1.090g/cm
3, Biuret Content 0. 02%, impurity content all meets standard-required, and Compatibility in Plastics meets the demands; After room temperature (23 DEG C) stores 48h, outward appearance, smell are without the perceptible change of sense organ, and it is all qualified that performance indications detect.
Be that the diesel engine machine frame of 8.6 liters carries out ESC working condition measurement in discharge capacity, ultralow temperature urea for vehicle solution of the present invention under specified discharge rate, after the process of SCR preprocessor, NO
xdischarge can reach state 4 requirement.
embodiment 4
Choose 75wt% urea liquid 31 parts, analytically pure ammonium formate 20 parts, analytically pure propane diols 10 parts, high purity water 39 parts; Room temperature (25 DEG C) be stirred to entirely molten after, via hole diameter is after the membrane filtration of 0.3 μm, is ultralow temperature urea for vehicle solution of the present invention.After measured, ultralow temperature urea for vehicle freezing point of solution-46 DEG C, tasteless, clear appearance is transparent, and density is 1.088g/cm
3, Biuret Content 0. 03%, impurity content all meets standard-required, and Compatibility in Plastics meets the demands; After room temperature (25 DEG C) stores 48h, outward appearance, smell are without the perceptible change of sense organ, and it is all qualified that performance indications detect.
Be that the diesel engine machine frame of 8.6 liters carries out ESC working condition measurement in discharge capacity, ultralow temperature urea for vehicle solution of the present invention under specified discharge rate, after the process of SCR preprocessor, NO
xdischarge can reach state 4 requirement.
Claims (2)
1. a ultralow temperature urea for vehicle solution, is characterized in that, is made up of the raw material of following weight portion: 75wt% urea liquid 27-31 part, ammonium formate 20-25 part, propane diols 10-15 part, high purity water 34-40 part.
2. the preparation method of ultralow temperature urea for vehicle solution according to claim 1, is characterized in that, comprise the following steps: through the membrane filtration of 0.2-0.5 μm and get final product after 75wt% urea liquid, ammonium formate, propane diols and high purity water being mixed.
Priority Applications (1)
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| CN201410701059.3A CN104607041B (en) | 2014-11-28 | 2014-11-28 | A kind of ultralow temperature urea for vehicle solution |
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| CN201410701059.3A CN104607041B (en) | 2014-11-28 | 2014-11-28 | A kind of ultralow temperature urea for vehicle solution |
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| CN104607041B CN104607041B (en) | 2018-02-09 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105056738A (en) * | 2015-08-18 | 2015-11-18 | 安阳化学工业集团有限责任公司 | Production technology of urea solution for cars |
| CN106039996A (en) * | 2016-06-28 | 2016-10-26 | 许江煌 | Adblue and preparation method thereof |
| CN106064020A (en) * | 2016-06-28 | 2016-11-02 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN107138044A (en) * | 2017-06-02 | 2017-09-08 | 许昌学院 | A kind of diesel vehicle urea liquid with cryogenic property 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 |
| CN108261922A (en) * | 2018-04-09 | 2018-07-10 | 薛向东 | A kind of preparation method of low temperature resistant urea for vehicle solution |
| CN108404665A (en) * | 2018-02-02 | 2018-08-17 | 杨耀辉 | Automobile urea liquid and preparation method thereof |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105056738A (en) * | 2015-08-18 | 2015-11-18 | 安阳化学工业集团有限责任公司 | Production technology of urea solution for cars |
| CN106039996A (en) * | 2016-06-28 | 2016-10-26 | 许江煌 | Adblue and preparation method thereof |
| CN106064020A (en) * | 2016-06-28 | 2016-11-02 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN106064020B (en) * | 2016-06-28 | 2018-10-23 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN107138044A (en) * | 2017-06-02 | 2017-09-08 | 许昌学院 | A kind of diesel vehicle urea liquid with cryogenic property 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 |
| CN107138044B (en) * | 2017-06-02 | 2020-06-23 | 许昌学院 | Diesel vehicle urea solution with low-temperature performance 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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| CN104607041B (en) | 2018-02-09 |
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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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