CN111375311A - Automotive urea solution capable of avoiding environmental pollution and preparation method thereof - Google Patents
Automotive urea solution capable of avoiding environmental pollution and preparation method thereof Download PDFInfo
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- CN111375311A CN111375311A CN202010204642.9A CN202010204642A CN111375311A CN 111375311 A CN111375311 A CN 111375311A CN 202010204642 A CN202010204642 A CN 202010204642A CN 111375311 A CN111375311 A CN 111375311A
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- environmental pollution
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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
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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
Abstract
The invention relates to the technical field of chemical industry, and discloses a vehicle urea solution capable of avoiding environmental pollution, which is prepared from the following raw materials in parts by weight: 40-50 parts of ultrapure water, 20-25 parts of urea, 10-15 parts of propylene glycol, 5-8 parts of cocamidopropyl betaine, 10-15 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 2-5 parts of an additive, and the preparation method of the automobile urea solution capable of avoiding environmental pollution comprises the following steps: s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion; s2: and adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a stirring motor is 200-400r/min, the time is 10-15min, and an additive in a certain proportion is added into the mixed solution in the stirring process. The vehicle urea solution capable of avoiding environmental pollution and the preparation method thereof have the advantages of higher urea purity, higher reaction rate, difficult freezing and the like.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a vehicle urea solution capable of avoiding environmental pollution and a preparation method thereof.
Background
The automobile industry in China has experienced high-speed growth along with economic development, and the automobile also brings energy and environmental protection problems while promoting the social and economic development and bringing convenience to people's lives. The nitrogen oxide and PM pollutants discharged by diesel automobiles in China respectively account for more than 60 percent and 90 percent of the total amount discharged by automobiles. The vehicle urea solution can reduce nitrogen oxides into nitrogen and water in a catalytic reduction technology (SCR) route, and reduces pollution sources of the atmosphere.
The diesel vehicle has higher requirement on the vehicle urea, and the catalyst in the SCR system is inactivated to reduce the reaction rate by condensing metal ions (Fe, K and Ca) and urea into biuret, melamine and other impurities at high temperature in the production and packaging process of the urea. The prior art carries out three-stage urea crystallization purification aiming at the problem, but the generation of partial biuret and triurea still exists in the purification process, so the problems of reducing the generation of biuret and triurea and increasing the solubility of urea are the problems to be solved in the field. Meanwhile, in the traditional urea formula, the purity of the processed urea is often insufficient, meanwhile, no improver is added in the preparation process of the urea solution, the reaction rate is easily reduced due to the slow reaction of the urea, and the like.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the vehicle urea solution capable of avoiding environmental pollution and the preparation method thereof, the vehicle urea solution has the advantages of high urea purity, high reaction rate, difficult freezing and the like, and solves the problems that the purity of the processed urea is often insufficient, an improver is not added in the preparation process of the urea solution, the reaction rate is easily reduced due to too slow reaction of the urea, and the like in the existing urea formula, and the catalytic efficiency is greatly reduced due to the fact that the traditional urea is easily frozen in a cold region.
(II) technical scheme
In order to realize the purposes of higher urea purity, higher reaction rate, difficult freezing and the like, the invention provides the following technical scheme: a vehicle urea solution capable of avoiding environmental pollution is prepared from the following raw materials in parts by weight: 40-50 parts of ultrapure water, 20-25 parts of urea, 10-15 parts of propylene glycol, 5-8 parts of cocamidopropyl betaine, 10-15 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 2-5 parts of additives.
A preparation method of vehicle urea solution capable of avoiding environmental pollution is characterized by comprising the following steps: the method comprises the following steps:
s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion;
s2: adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a stirring motor is 200-400r/min, the time is 10-15min, and an additive in a certain proportion is added into the mixed solution in the stirring process;
s4: and (4) carrying out multilayer filtration on the mixed solution in the step S3 to obtain the urea solution for the vehicle.
The ultrapure water is filtered by a filter and then enters a precision filter with the diameter of 5 mu m, impurities are filtered by a cartridge filter with the diameter of 1 mu m, the ultrapure water is pumped into a first-stage reverse osmosis device by a first-stage high-pressure pump, then is subjected to electrolytic desalination, and finally enters an ultrapure water tank, so that the ultrapure water is obtained.
The additive is a mixture of sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate, and the weight ratio of the sodium carbonate to the ammonium persulfate to the ammonium alcohol ether carboxylate is 3: 1: 1.
the pure water raw material has a particle count of 0.05 μm or less.
The filter through which the ultrapure water passes is a multi-media filter.
The medium in the multi-medium filter can be quartz sand and activated carbon.
(III) advantageous effects
Compared with the prior art, the invention provides the vehicle urea solution capable of avoiding environmental pollution and the preparation method thereof, and the vehicle urea solution has the following beneficial effects:
the automobile urea solution capable of avoiding environmental pollution is added with the cocamidopropyl betaine, so that the freezing point of the automobile urea solution can be effectively reduced, the problem that the urea solution is easy to crystallize in cold weather is solved, and the reaction rate of urea is high under the action of a mixture added with sodium carbonate, ammonium persulfate and alcohol ether ammonium carboxylate as an additive, so that nitrogen oxides in tail gas can be effectively subjected to catalytic decomposition.
The preparation method of the vehicle urea solution capable of avoiding environmental pollution adopts multi-medium filtration to obtain ultrapure water, so that the purity of urea is higher,
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a vehicle urea solution capable of avoiding environmental pollution is prepared from the following raw materials in parts by weight: 50 parts of ultrapure water, 25 parts of urea, 15 parts of propylene glycol, 8 parts of cocamidopropyl betaine, 15 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 5 parts of additive.
A preparation method of vehicle urea solution capable of avoiding environmental pollution is characterized by comprising the following steps: the method comprises the following steps:
s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion;
s2: adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a uniformly stirred motor is 400r/min, the time is 15min, and adding an additive into the mixed solution in a certain proportion in the stirring process;
s4: and (4) carrying out multilayer filtration on the mixed solution in the step S3 to obtain the urea solution for the vehicle.
The ultrapure water is filtered by a filter and then enters a precision filter with the diameter of 5 mu m, impurities are filtered by a cartridge filter with the diameter of 1 mu m, the ultrapure water is pumped into a first-stage reverse osmosis device by a first-stage high-pressure pump, then is subjected to electrolytic desalination, and finally enters an ultrapure water tank, so that the ultrapure water is obtained.
The additive is a mixture of sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate, and the weight ratio of the sodium carbonate to the ammonium persulfate to the ammonium alcohol ether carboxylate is 3: 1: 1.
the pure water raw material has a particle count of 0.05 μm or less.
The filter through which the ultrapure water passes is a multi-media filter.
The medium in the multi-medium filter can be quartz sand and activated carbon.
Example two:
a vehicle urea solution capable of avoiding environmental pollution is prepared from the following raw materials in parts by weight: 45 parts of ultrapure water, 20 parts of urea, 13 parts of propylene glycol, 6 parts of cocamidopropyl betaine, 12 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 4.5 parts of additive.
A preparation method of vehicle urea solution capable of avoiding environmental pollution is characterized by comprising the following steps: the method comprises the following steps:
s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion;
s2: adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a uniformly stirred motor is 300r/min, the time is 10min, and an additive in a certain proportion is added into the mixed solution in the stirring process;
s4: and (4) carrying out multilayer filtration on the mixed solution in the step S3 to obtain the urea solution for the vehicle.
The ultrapure water is filtered by a filter and then enters a precision filter with the diameter of 5 mu m, impurities are filtered by a cartridge filter with the diameter of 1 mu m, the ultrapure water is pumped into a first-stage reverse osmosis device by a first-stage high-pressure pump, then is subjected to electrolytic desalination, and finally enters an ultrapure water tank, so that the ultrapure water is obtained.
The additive is a mixture of sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate, and the weight ratio of the sodium carbonate to the ammonium persulfate to the ammonium alcohol ether carboxylate is 3: 1: 1.
the pure water raw material has a particle count of 0.05 μm or less.
The filter through which the ultrapure water passes is a multi-media filter.
The medium in the multi-medium filter can be quartz sand and activated carbon.
Example three:
a vehicle urea solution capable of avoiding environmental pollution is prepared from the following raw materials in parts by weight: 45 parts of ultrapure water, 24 parts of urea, 12 parts of propylene glycol, 6 parts of cocamidopropyl betaine, 13 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 4 parts of additive.
A preparation method of vehicle urea solution capable of avoiding environmental pollution is characterized by comprising the following steps: the method comprises the following steps:
s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion;
s2: adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a uniformly stirred motor is 200r/min, the time is 10min, and an additive in a certain proportion is added into the mixed solution in the stirring process;
s4: and (4) carrying out multilayer filtration on the mixed solution in the step S3 to obtain the urea solution for the vehicle.
The ultrapure water is filtered by a filter and then enters a precision filter with the diameter of 5 mu m, impurities are filtered by a cartridge filter with the diameter of 1 mu m, the ultrapure water is pumped into a first-stage reverse osmosis device by a first-stage high-pressure pump, then is subjected to electrolytic desalination, and finally enters an ultrapure water tank, so that the ultrapure water is obtained.
The additive is a mixture of sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate, and the weight ratio of the sodium carbonate to the ammonium persulfate to the ammonium alcohol ether carboxylate is 3: 1: 1.
the pure water raw material has a particle count of 0.05 μm or less.
The filter through which the ultrapure water passes is a multi-media filter.
The medium in the multi-medium filter can be quartz sand and activated carbon.
In conclusion, the cocoamidopropyl betaine is added into the automobile urea solution capable of avoiding environmental pollution, so that the freezing point of the automobile urea solution can be effectively reduced, the problem that the urea solution is easy to crystallize in cold weather is solved, the reaction rate of urea is high under the action of a mixture added with sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate as an additive, and nitrogen oxides in tail gas can be effectively catalytically decomposed; the preparation method of the vehicle urea solution capable of avoiding environmental pollution adopts multi-medium filtration to obtain ultrapure water, so that the purity of urea is higher.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a can avoid environmental pollution's automobile-used urea liquid which characterized in that: the urea solution consists of the following raw materials in parts by weight: 40-50 parts of ultrapure water, 20-25 parts of urea, 10-15 parts of propylene glycol, 5-8 parts of cocamidopropyl betaine, 10-15 parts of ammonium formate or ammonium acetate or any proportion combination thereof and 2-5 parts of additives.
2. The method for preparing urea solution for vehicle capable of avoiding environmental pollution according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
s1: sequentially adding urea, propylene glycol, cocamidopropyl betaine, ammonium formate or ammonium acetate or any proportion combination thereof into ultrapure water according to a proportion;
s2: adding the mixed solution obtained in the step S2 into a stirrer for stirring uniformly, wherein the rotating speed of a stirring motor is 200-400r/min, the time is 10-15min, and an additive in a certain proportion is added into the mixed solution in the stirring process;
s4: and (4) carrying out multilayer filtration on the mixed solution in the step S3 to obtain the urea solution for the vehicle.
3. The urea solution for vehicle capable of avoiding environmental pollution according to claim 1, wherein: the ultrapure water is filtered by a filter and then enters a precision filter with the diameter of 5 mu m, impurities are filtered by a cartridge filter with the diameter of 1 mu m, the ultrapure water is pumped into a first-stage reverse osmosis device by a first-stage high-pressure pump, then is subjected to electrolytic desalination, and finally enters an ultrapure water tank, so that the ultrapure water is obtained.
4. The urea solution for vehicle capable of avoiding environmental pollution according to claim 1, wherein: the additive is a mixture of sodium carbonate, ammonium persulfate and ammonium alcohol ether carboxylate, and the weight ratio of the sodium carbonate to the ammonium persulfate to the ammonium alcohol ether carboxylate is 3: 1: 1.
5. the urea solution for vehicle capable of avoiding environmental pollution according to claim 1, wherein: the pure water raw material has a particle count of 0.05 μm or less.
6. The urea solution for vehicle capable of avoiding environmental pollution according to claim 3, wherein: the filter through which the ultrapure water passes is a multi-media filter.
7. The urea solution for vehicle capable of avoiding environmental pollution according to claim 6, wherein: the medium in the multi-medium filter can be quartz sand and activated carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010204642.9A CN111375311A (en) | 2020-03-22 | 2020-03-22 | Automotive urea solution capable of avoiding environmental pollution and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010204642.9A CN111375311A (en) | 2020-03-22 | 2020-03-22 | Automotive urea solution capable of avoiding environmental pollution and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120291339A1 (en) * | 2010-02-05 | 2012-11-22 | Palox Limited | Protection of liquid fuels |
| CN105854603A (en) * | 2016-05-10 | 2016-08-17 | 南宁市夏阳化工科技有限责任公司 | Diesel tail gas treating agent production method |
| CN108993137A (en) * | 2018-08-15 | 2018-12-14 | 罗永平 | A kind of urea for vehicle solution and preparation method thereof |
| CN209522570U (en) * | 2019-01-29 | 2019-10-22 | 大连九菱新兴科技有限公司 | Urea for vehicle solution loading system with heating function |
| CN110559930A (en) * | 2019-09-16 | 2019-12-13 | 山东益丰生化环保股份有限公司 | Vehicle urea solution and preparation method thereof |
-
2020
- 2020-03-22 CN CN202010204642.9A patent/CN111375311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120291339A1 (en) * | 2010-02-05 | 2012-11-22 | Palox Limited | Protection of liquid fuels |
| CN105854603A (en) * | 2016-05-10 | 2016-08-17 | 南宁市夏阳化工科技有限责任公司 | Diesel tail gas treating agent production method |
| CN108993137A (en) * | 2018-08-15 | 2018-12-14 | 罗永平 | A kind of urea for vehicle solution and preparation method thereof |
| CN209522570U (en) * | 2019-01-29 | 2019-10-22 | 大连九菱新兴科技有限公司 | Urea for vehicle solution loading system with heating function |
| CN110559930A (en) * | 2019-09-16 | 2019-12-13 | 山东益丰生化环保股份有限公司 | Vehicle urea solution and preparation method thereof |
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Application publication date: 20200707 |