CN109777665A - In-cylinder direct fuel-injection engine inlet valve exempts to tear cleaning compositions and method open - Google Patents
In-cylinder direct fuel-injection engine inlet valve exempts to tear cleaning compositions and method open Download PDFInfo
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- CN109777665A CN109777665A CN201910106128.9A CN201910106128A CN109777665A CN 109777665 A CN109777665 A CN 109777665A CN 201910106128 A CN201910106128 A CN 201910106128A CN 109777665 A CN109777665 A CN 109777665A
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- detergent
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- isooctanoate
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- heptane
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- 238000004140 cleaning Methods 0.000 title claims abstract description 79
- 239000000203 mixture Substances 0.000 title claims abstract description 56
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 30
- OEOIWYCWCDBOPA-UHFFFAOYSA-N 6-methyl-heptanoic acid Chemical compound CC(C)CCCCC(O)=O OEOIWYCWCDBOPA-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000003599 detergent Substances 0.000 claims abstract description 53
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 47
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 44
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 44
- 150000001412 amines Chemical class 0.000 claims abstract description 40
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 claims abstract description 39
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 38
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002270 dispersing agent Substances 0.000 claims abstract description 38
- 238000009835 boiling Methods 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 13
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- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 11
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 11
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 85
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims description 36
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 23
- 229960002317 succinimide Drugs 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 16
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- 239000000654 additive Substances 0.000 abstract description 5
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- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract 2
- SNCZNSNPXMPCGN-UHFFFAOYSA-N butanediamide Chemical compound NC(=O)CCC(N)=O SNCZNSNPXMPCGN-UHFFFAOYSA-N 0.000 abstract 1
- 239000003502 gasoline Substances 0.000 description 19
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- 239000010687 lubricating oil Substances 0.000 description 6
- 239000010721 machine oil Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
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- XMJHPCRAQCTCFT-UHFFFAOYSA-N methyl chloroformate Chemical compound COC(Cl)=O XMJHPCRAQCTCFT-UHFFFAOYSA-N 0.000 description 5
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- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 3
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- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 2
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
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- DMEGYFMYUHOHGS-UHFFFAOYSA-N cycloheptane Chemical compound C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 2
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- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
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- 229910052717 sulfur Inorganic materials 0.000 description 2
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- 229910052725 zinc Inorganic materials 0.000 description 2
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- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 1
- GNLLVGLBEKGLTI-UHFFFAOYSA-N 2-methylprop-1-ene;pyrrolidine-2,5-dione Chemical compound CC(C)=C.O=C1CCC(=O)N1 GNLLVGLBEKGLTI-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001263 acyl chlorides Chemical class 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
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- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention belongs to cleaning technology fields, the invention discloses a kind of in-cylinder direct fuel-injection engine inlet valves to exempt to tear cleaning compositions and method open, wherein composition includes detergent-dispersant additive and dispensing of detergent, and the detergent-dispersant additive includes following component according to mass percentage meter: benzoyl polyisobutene amine 3-50%；Isocaprylic acid lanthanum 3-25%；Isooctyl acid cerium 2-23%；First vector 60-90%, the hydrocarbon solvent carrier that the first vector is 60-90 DEG C of boiling range；The dispensing of detergent includes following component according to mass percentage meter: polyisobutylene succinamide 6-30%；Second support 60-95%, the hydrocarbon solvent that the Second support is 60-90 DEG C of boiling range.Cleaning compositions of the invention by the way of spray, can effectively remove the carbon distribution adhered on inlet valve in the state that air intake duct and inlet valve are without disassembly.
Description
Technical Field
The invention belongs to the technical field of cleaning, and particularly relates to a disassembly-free cleaning composition and a method for an intake valve of a direct injection engine.
Background
In recent years, turbocharging and direct injection in a cylinder are becoming important technical development trends of spark-ignition gasoline engines, and turbocharging has obvious advantages in providing engine power density and increasing torque output, so that the engine power performance is remarkably improved without increasing the exhaust gas quantity. The direct injection technology in the cylinder has obvious advantages in improving the fuel economy and meeting the whole emission standard. However, turbocharged direct injection engine intake valves are more prone to carbonaceous deposits during use. The adhesion of carbon deposits on the back of the intake valve is serious, which causes many problems. Firstly, the idling of the engine is unstable and suddenly high and suddenly low; secondly, the cold vehicle starting difficulty is influenced, and the cold vehicle starting idling shake is slight; thirdly, reducing the power of the engine to ensure that the power output of the engine is uneven and gradually attenuated; fourthly, the oil consumption is increased, and the economic burden of the car owner is increased; finally, the exhaust emission of the engine exceeds the standard, and the environmental pollution is aggravated.
For carbon deposition behind the intake valve, although in the direct injection engine, fuel can not directly spout behind the intake valve, machine oil can be introduced into intake manifold by crankcase ventilation system to get into the cylinder through the intake valve and burn, minute amount of machine oil composition that is mingled with in the machine oil steam has formed carbon deposition under the effect of high temperature, and behind the intake valve because there is not cooling and washing of fuel, form intake valve carbon deposition more easily, it also becomes more difficult to clear away in addition. Under the operation condition of the naturally aspirated engine, gasoline sprayed by the oil nozzle enters the cylinder through the air inlet channel and the air inlet valve, and in the process, the gasoline can clean the parts. Therefore, the traditional gasoline fuel additive added into the oil tank is good, the 'hanging bottle' type oil nozzle cleaning agent for replacing gasoline combustion is good, and the intake valve of the direct-injection engine cannot be cleaned.
When the soot deposition of the air intake system of the direct injection engine is particularly serious, the soot deposition is usually removed by a disassembly and cleaning manner in a repair shop. Usually, a high-base number cleaning agent or a strong solvent is used for cleaning to remove carbon deposition. However, the way of unpicking and washing is effective, but it is time-consuming and laborious, and the removal and replacement of the device will also have a negative effect on the degree of mechanical sealing.
Disclosure of Invention
The embodiment of the invention provides a disassembly-free cleaning composition and a method for an intake valve of a direct injection engine.
The purpose of the embodiment of the invention is realized by the following technical means:
the invention provides a disassembly-free cleaning composition for an intake valve of a direct injection engine, which comprises a detergent dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
3-50% of benzoyl polyisobutene amine;
3-25% of lanthanum isooctanoate;
2-23% of cerium isooctanoate;
60-90% of first carrier, wherein the first carrier is a hydrocarbon solvent carrier with a distillation range of 60-90 ℃,
the dispersing detergent comprises the following components in percentage by mass:
6-30% of polyisobutenyl succinimide;
60-95% of second carrier, wherein the second carrier is a hydrocarbon solvent with the distillation range of 60-90 ℃.
Furthermore, the mass percentage of the benzoyl polyisobutene amine in the detergent dispersant is 6-20%.
Furthermore, the mass percentage of lanthanum isooctanoate in the detergent dispersant is 5-25%.
Furthermore, the mass percentage of cerium isooctanoate in the detergent dispersant is 3-12%.
Further, the first carrier comprises dimethyl carbonate and heptane, and the initial boiling point of the heptane is more than or equal to 80 ℃; the recovery temperature of 98 percent is less than or equal to 120 ℃.
Further, the composition comprises a detergent dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
12.55 percent of benzoyl polyisobutene amine;
6.21 percent of lanthanum isooctanoate;
4.86% of cerium isooctanoate;
3.50 percent of dimethyl carbonate;
72.88 percent of heptane;
in the detergent dispersant, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃;
the dispersing detergent comprises the following components in percentage by mass:
9 percent of polyisobutenyl succinimide,
91% of heptane (the initial boiling point is more than or equal to 80, and the 98% recovery temperature is less than or equal to 120);
in the dispersing detergent, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃;
the embodiment of the second aspect of the invention provides a preparation method of a disassembly-free cleaning composition for an intake valve of a direct injection engine, wherein the composition is any one of the compositions, and the preparation method comprises the following steps:
putting the first carrier into a blending tank, and stirring at normal temperature, wherein the rotating speed is 40-60 r/min; adding in-process benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate and dimethyl carbonate in the stirring process, and then stirring for 30 minutes to obtain the clean dispersing agent;
putting the second carrier into a blending tank for stirring at normal temperature, wherein the rotating speed is set to be 40-60 r/min; and putting the polyisobutenyl succinimide into the tank body in the stirring process, and then stirring for 15 minutes to obtain the dispersing detergent.
An embodiment of the third aspect of the present invention provides a method for using a disassembly-free cleaning composition for an intake valve of a direct injection engine, where the composition is any one of the above compositions, and the method includes the following steps:
firstly, the cleaning dispersant is adopted to spray the engine air inlet channel at the pressure of 0.4Mpa, then the dispersing detergent is adopted to spray at the pressure of 0.8Mpa, and the cleaned sediment is dispersed and carried away.
By means of the scheme, the disassembly-free cleaning composition and the method for the intake valve of the direct injection engine at least have the following beneficial effects:
in the disassembly-free cleaning composition for the intake valve of the direct injection engine, benzoyl polyisobutene amine, lanthanum isooctanoate and dimethyl carbonate are combined, a mixing proportion with a surprising synergistic effect is found, and 86% of carbon deposition attached to the intake valve can be effectively removed by adopting a spraying mode under the state that the intake passage and the intake valve are not disassembled.
2. The cleaning construction of the carbonaceous deposit of the intake valve adopts a secondary step method: firstly, the cleaning dispersant cleaning solution with the pressure of 0.4Mpa is adopted to spray the air inlet, so that the carbon deposits are well moistened, softened and stripped, then the dispersing detergent cleaning solution is adopted to spray at the pressure of 0.8Mpa, and the cleaned deposits are dispersed and carried away, so that secondary pollution to the air inlet and the air inlet valve is avoided.
Detailed Description
In order to facilitate the understanding of the scheme of the present invention for those skilled in the art, the following further describes the scheme of the present invention with reference to specific examples, and it should be understood that the examples of the present invention are illustrative of the scheme of the present invention and are not intended to limit the scope of the present invention.
The applicant tests and analyzes the components of the carbon deposit on the inlet valve, and finds that the carbon deposit of the inlet valve contains more trace elements such as calcium, sulfur, phosphorus, zinc, molybdenum and the like. The majority of these elements come from additives in engine oils, and gasoline contains fewer of these components. Wherein, calcium element comes from detergent, sulfur element comes from extreme pressure agent and antiwear agent, zinc element comes from antiwear agent and antioxidant, and molybdenum element comes from antiwear agent. This test verifies that the formation of soot on the intake valve is related to the back-flow blow-by of the engine oil.
The applicant researches and discovers that the carbon deposit attached to the intake valve of the direct injection engine is formed by carbonizing engine oil. Unlike a naturally aspirated engine, in a direct injection engine, fuel is not directly injected at the intake valve surface, and intake valves are susceptible to formation of intake valve deposits because they have not undergone cooling and washing of the fuel. For carbon deposition behind the intake valve, although in the direct injection engine, fuel can not directly spout behind the intake valve, machine oil can be introduced into intake manifold by crankcase ventilation system to get into the cylinder through the intake valve and burn, minute amount of machine oil composition that is mingled with in the machine oil steam has formed carbon deposition under the effect of high temperature, and behind the intake valve because there is not cooling and washing of fuel, form intake valve carbon deposition more easily, it also becomes more difficult to clear away in addition.
Carbonaceous deposits formed by the combustion of lubricating oils, and metal oxides formed by the combustion of metal additives to lubricating oils, constitute carbon deposits on intake valves. Because the separation of the liquid engine oil and the engine oil vapor in the positive crankcase ventilation system is not complete, a small amount of liquid engine oil which is originally returned to the lubricating system is mixed into the vapor (the engine oil vapor is too viscous) to form carbon deposition on the back of the intake valve.
The lubricating oil base oil mainly comprises mineral base oil, synthetic base oil and biological base oil. Commonly used additives are: viscosity index improver, pour point depressant, antioxidant, detergent dispersant, friction moderator, anti-foam agent, antirust agent, etc. The environmental temperature of the inlet valve is 200-300 ℃, so that the evaporation and oxidation strength of the lubricating oil is obviously increased, and the lubricating oil molecules and oxygen in high-temperature and high-pressure air act to be quickly oxidized. The action of oxidation changes the physical, chemical properties of the lubricating oil to form acids, pitch, and additional compounds. They are deposited at the inlet ducts and inlet valves, together with dust in the air and metal particles from the piston rings and cylinder walls, which form so-called carbon deposits.
The in-cylinder direct injection engine intake valve disassembly-free cleaning compositions described herein are divided into two groups. The first group uses benzoyl polyisobutene amine, lanthanum isooctanoate and cerium isooctanoate as main clean dispersing components, uses hydrocarbon solvent with the distillation range of 60-90 ℃ as a carrier, and performs continuous spray cleaning on an intake valve of the direct injection engine for 40 minutes under the pressure of 0.4MPA, thereby effectively removing 86% of carbonaceous deposits on the intake valve of the direct injection engine. The second group is a dispersing and washing liquid mainly containing polyisobutenyl succinimide with excellent oil sludge dispersibility and taking a hydrocarbon solvent with the distillation range of 60-90 ℃ as a carrier, and the second group is used for continuously spraying and washing an intake valve of the direct injection engine for 10 minutes at the pressure of 0.8MPA, so that carbon deposits stripped from the intake valve can be washed clean and carried away.
Detergent dispersant
In the cylinder direct injection engine intake valve disassembly-free cleaning composition, in the first group of cleaning solutions, benzoylpolyisobutene amine, lanthanum isooctanoate and cerium isooctanoate serve as components of a carbon deposit detergent. Through a large number of experiments, the inventor surprisingly finds that when the components are used independently, the carbon deposition removal efficiency is low, but when the components are mixed and used according to a certain proportion, the high-efficiency synergistic effect is shown, and 86% of carbon deposits on an intake valve of the direct injection engine can be removed.
Benzoyl polyisobutene amine
After a lot of tests, benzoyl polyisobutene amine is locked in a proportion range of 3-50%, preferably a proportion range of 6-20% in a first group of cleaning liquid of a cylinder direct injection engine intake valve disassembly-free cleaning composition, the benzoyl polyisobutene amine is prepared by the following steps of adding benzoyl chloride and high-activity polyisobutene (M ═ 1200) with 90% of olefinic bond content of α and 2 times of molar number of the benzoyl chloride into a reaction kettle, reacting at 80 ℃ for 4 hours under the action of a solid acid catalyst loaded on kieselguhr by sulfuric acid to obtain benzoyl polyisobutene, adding the prepared benzoyl polyisobutene, Raney nickel catalyst with 12% of the weight of the benzoyl polyisobutene and isopropylamine with 5 times of molar number of the benzoyl chloride into the high-pressure reaction kettle, introducing hydrogen, reacting at 150 ℃ and 10.0MPa for 5 hours, cooling, filtering and distilling, and dehydrating to obtain the benzoyl polyisobutene amine with the structural formula (II) with the amine value of 0.72, wherein the yield is 81%.
Lanthanum Isooctoate
Through a number of tests, we locked lanthanum isooctanoate in a proportion range of 3-25%, preferably in a proportion range of 5-25%, in the first group of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition. Lanthanum isooctanoate was prepared as follows: adding a certain amount of isooctanoic acid and sodium hydroxide solution into a reactor, stirring for reaction for saponification, then adding aviation coal, continuing to heat, starting to add rare earth nitrate (lanthanum nitrate) solution when the temperature rises to a certain value, keeping the temperature for reaction for a period of time, after the reaction is finished, pouring the product into a separating funnel, standing for layering, separating out a water layer and an organic layer, analyzing the content of rare earth elements in the water phase, and calculating the conversion rate. Research shows that the optimal synthesis conditions of lanthanum isooctanoate are as follows: the reaction temperature is 80 ℃, and the reaction time is 20 min. The saponification rate is 80%, and the rare earth conversion rate can reach 99.98% under the condition.
From a thermogravimetric analysis chart of a sample containing aviation kerosene and containing lanthanum isooctanoate, it can be seen that the lanthanum isooctanoate sample is heated to 150 ℃, the weight loss of the sample is about 70%, aviation kerosene is completely volatilized, then lanthanum isooctanoate in the sample undergoes a relatively long weight loss stage at 150-400 ℃, and after 400 ℃, lanthanum isooctanoate is mainly decomposed into lanthanum oxide. The temperatures of the intake passage and the intake valve low-temperature part were around 300 ℃, so that it was found that lanthanum isooctanoate exhibited an excellent effect of removing carbon deposit from the intake valve low-temperature part.
Cerium isooctanoate
Through a large number of tests, in the first group of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition, the cerium isooctanoate is locked in a proportion range of 2-23%, and preferably in a proportion range of 3-12%. Cerium isooctanoate was prepared as follows: isooctanoic acid is used as a raw material, and is subjected to saponification with sodium hydroxide and cerium chloride double decomposition reaction to synthesize cerium isooctanoate, and the influence of saponification rate, reaction time and reaction temperature on cerium chloride conversion rate is researched. The experiment obtains the optimal process conditions: the reaction time is about 20min, the temperature is 55-65 ℃, the saponification rate is 75%, and the conversion rate of cerium chloride can reach more than 99.96%.
Polyisobutenyl succinimide
The polyisobutenyl succinimide has good detergency and low-temperature oil sludge dispersibility, can inhibit the generation of carbon deposit and paint film on the piston of an engine, and is widely applied to preparing medium-grade and high-grade gasoline engine oil, preparing diesel engine oil and preparing environment-friendly internal combustion engine oil. In the second group of cleaning liquids, we used polyisobutenyl succinimide as a dispersant to effectively disperse the carbonaceous deposits peeled off from the intake valve in the heptane liquid. After extensive testing, we locked isobutylene succinimide in the range of 6-30%, preferably 7-20% in the first set of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition. The preparation process of the polyisobutenyl succinimide comprises the following steps: isobutene gas obtained by catalytic cracking of methyl tert-butyl ether is used as a raw material, complex F-K acid is used as an initiator, cationic polymerization is carried out at the temperature of-5 ℃ to-10 ℃ to obtain a polyisobutene oligomer with the number average molecular weight of 1000-1500, then the polyisobutene oligomer and maleic anhydride are subjected to thermal reaction at the reflux temperature of the polyisobutene oligomer, after a certain conversion rate is reached, free radical polymerization is carried out at the temperature of 170 ℃ under the action of the initiator to obtain polyisobutene succinic anhydride with the active matter content of more than 95%, and finally a polyisobutene succinimide product is obtained by reaction of polyethylene polyamine.
Carrier solvent
Carbonic acid dimethyl ester
Dimethyl carbonate has similar cleaning capacity to xylene, has high oxygen content (the oxygen content in molecules is as high as 53 percent) and excellent octane number improving effect ((R + M)/2 ═ 105) besides good dissolving power for an air inlet and an air inlet valve, and can promote the gasoline in a cylinder to be more fully combusted after entering the cylinder through an air inlet system. Through a large number of tests, in the first group of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition, the dimethyl carbonate is locked in a proportion range of 2-20%, and preferably in a proportion range of 3-10%. The synthesis method of the dimethyl carbonate comprises the following steps: introducing CO and chlorine into a phosgene generator according to the molar ratio of 1:1.05, performing a synthesis reaction in the phosgene generator under the catalysis of coconut shell activated carbon to generate phosgene, introducing the phosgene and methanol into an esterification tower according to the molar ratio of 1:1.1 to perform esterification reaction, acyl chloride alcoholysis reaction and gas-liquid bubbling reaction to synthesize methyl chloroformate, and after the esterification is finished, overflowing the reaction liquid phase of the methanol and the methyl chloroformate from the top of the reactor to a methyl chloroformate removing kettle for collection and then removing gas for refining; the tail gas at the top of the reactor is subjected to two-stage ice water cooling recovery, methanol falling film absorption and tail breakage treatment to obtain the tail gas containing light, and the methyl chloroformate and methanol after washing the refined methyl chloroformate are fed into a fixed bed reactor with calcium chloride as a catalyst according to the molar ratio of 1:1.2 to synthesize the dimethyl carbonate.
Heptane (Heptane)
Heptane has a relatively high kauri-butanol value (KB value) and has excellent solubility with various solvents. The product is produced by using high-quality light hydrocarbon in oil field as raw material and adopting continuous rectification process, and its main components include n-heptane, iso-heptane and cycloheptane, and also contain small quantity of octane and hexane, and at normal temp. and normal pressure it is liquid, and is inflammable and volatile. Heptane with the initial boiling point being more than or equal to 80 ℃ and the 98% recovery temperature being less than or equal to 120 ℃ is selected as carrier oil, so that the carrier oil is convenient to dissolve and carry cleaning components such as benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate, polyisobutenyl succinimide and the like, and the carrier oil can be completely combusted after entering a cylinder through an air inlet. In the first group of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition, the heptane is locked in the proportion range of 60-90%, preferably in the proportion range of 68-80%. In the second group of cleaning solutions of the in-cylinder direct injection engine intake valve disassembly-free cleaning composition, the heptane is locked in the proportion range of 60-95%, preferably 85-93%.
The invention provides a disassembly-free cleaning composition for an intake valve of a direct injection engine, which comprises a detergent dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
3-50% of benzoyl polyisobutene amine;
3-25% of lanthanum isooctanoate;
2-23% of cerium isooctanoate;
60-90% of first carrier, wherein the first carrier is a hydrocarbon solvent carrier with a distillation range of 60-90 ℃,
the dispersing detergent comprises the following components in percentage by mass:
6-30% of polyisobutenyl succinimide;
60-95% of second carrier, wherein the second carrier is a hydrocarbon solvent with the distillation range of 60-90 ℃.
In some embodiments of the present invention, the detergent dispersant contains 6 to 20% by mass of benzoylpolyisobutene amine.
In some embodiments of the invention, the detergent dispersant contains 5-25% by mass of lanthanum isooctanoate.
In some embodiments of the invention, the detergent dispersant contains cerium isooctanoate in an amount of 3 to 12% by mass.
In some embodiments of the invention, the first carrier comprises dimethyl carbonate and heptane, and the initial boiling point of the heptane is more than or equal to 80 ℃; the recovery temperature of 98 percent is less than or equal to 120 ℃.
In some embodiments of the invention, the composition comprises a detergent dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
12.55 percent of benzoyl polyisobutene amine;
6.21 percent of lanthanum isooctanoate;
4.86% of cerium isooctanoate;
3.50 percent of dimethyl carbonate;
72.88 percent of heptane;
in the detergent dispersant, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃;
the dispersing detergent comprises the following components in percentage by mass:
9 percent of polyisobutenyl succinimide,
91% of heptane (the initial boiling point is higher than or equal to 8098%, and the recovery temperature is lower than or equal to 120%);
in the dispersing detergent, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃;
the embodiment of the second aspect of the invention provides a preparation method of a disassembly-free cleaning composition for an intake valve of a direct injection engine, wherein the composition is any one of the compositions, and the preparation method comprises the following steps:
putting the first carrier into a blending tank, and stirring at normal temperature, wherein the rotating speed is 40-60 r/min; adding in-process benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate and dimethyl carbonate in the stirring process, and then stirring for 30 minutes to obtain the clean dispersing agent;
putting the second carrier into a blending tank for stirring at normal temperature, wherein the rotating speed is set to be 40-60 r/min; and putting the polyisobutenyl succinimide into the tank body in the stirring process, and then stirring for 15 minutes to obtain the dispersing detergent.
An embodiment of the third aspect of the present invention provides a method for using a disassembly-free cleaning composition for an intake valve of a direct injection engine, where the composition is any one of the above compositions, and the method includes the following steps:
firstly, the cleaning dispersant is adopted to spray the engine air inlet channel at the pressure of 0.4Mpa, then the dispersing detergent is adopted to spray at the pressure of 0.8Mpa, and the cleaned sediment is dispersed and carried away.
Disassembly-free cleaning composition for intake valve of direct injection engine in cylinder and manufacturing process thereof
Chemical ingredient mutual synergistic efficacy screening test
TABLE 1 screening test for efficacy of mutual synergy of chemical components
And (3) screening test evaluation of mutual synergistic effect of chemical components:
based on the experimental data of the laboratory chemical ingredient mutual synergistic efficacy screening test table 1, we found that in the disassembly-free cleaning composition for the intake valve of the direct injection engine:
when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 0 percent, and the heptane is 76.38 percent, the cleaning rate is found to reach 75 percent by detecting according to a simulation test method of the deposit of the gasoline engine intake valve;
when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 0 percent, the dimethyl carbonate is 3.5 percent and the heptane 77.44 percent, the cleaning rate is up to 74 percent by detecting according to a gasoline engine air inlet valve sediment simulation test method;
when the addition proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 0 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.50 percent and the heptane 79.09 percent, the cleaning rate is up to 74 percent by detecting according to a gasoline engine intake valve sediment simulation test method;
when the addition proportion of the benzoyl polyisobutene amine is 0%, the lanthanum isooctanoate is 6.21%, the cerium isooctanoate is 4.86%, the dimethyl carbonate is 3.5% and the heptane is 85.43%, the cleaning rate is 73% by detecting according to a gasoline engine intake valve sediment simulation test method;
when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.5 percent and the heptane is 72.88 percent, the cleaning rate is up to 86 percent by detecting according to a simulation test method of the deposit of the air inlet valve of the gasoline engine.
Formulation cleaning efficiency screening test
Table 2 formulation cleaning efficiency screening test
And (3) screening test evaluation of formula cleaning rate:
based on the laboratory formulation cleaning efficiency efficacy screening test data of table 2, we found that in cylinder direct injection engine intake valve disassembly-free cleaning compositions:
when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.50 percent and the heptane is 72.88 percent, the cleaning rate is up to 86 percent by detecting according to a simulation test method of the deposit of the air inlet valve of the gasoline engine.
When the components of the benzoyl polyisobutene amine, the lanthanum isooctanoate, the cerium isooctanoate and the dimethyl carbonate are reduced in proportion, the cleaning rate is obviously reduced; when the components of benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate and dimethyl carbonate are increased in proportion, the cleaning rate is not obviously improved. From the aspect of cost performance, we select sample E as the reference basis of the final preferred formulation.
The preferable formula is as follows:
cleaning dispersant:
12.55 percent of benzoyl polyisobutene amine
Lanthanum isooctanoate 6.21%
4.86 percent of cerium isooctanoate
3.50 percent of dimethyl carbonate
Heptane (initial boiling point ℃ ≥ 80, 98% recovery temperature ≤ 120 ℃) 72.88%
The blending process comprises the following steps:
adding heptane into a blending tank, and stirring at normal temperature with the rotation speed of 40-60 r/min; in the stirring process, the benzoyl polyisobutene amine, the lanthanum isooctanoate, the cerium isooctanoate and the dimethyl carbonate are put into a tank body, and then stirred for 30 minutes.
Dispersing the detergent:
polyisobutylene-based succinimide 9%
Heptane (initial boiling point ℃ > 80, 98% recovery temperature < 120) 91%
The blending process comprises the following steps:
adding heptane into a blending tank, and stirring at normal temperature with the rotation speed of 40-60 r/min; the polyisobutenyl succinimide was charged into the pot while stirring, and then stirred for another 15 minutes.
1. In the disassembly-free cleaning composition for the intake valve of the direct injection engine, when the addition proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.50 percent and the heptane is 72.88 percent, the cleaning rate is up to 86 percent according to the detection of a gasoline engine intake valve sediment simulation test method.
2. The construction adopts a secondary cleaning step method, firstly, the cleaning dispersant cleaning solution with the pressure of 0.4Mpa is adopted to continuously spray the air inlet channel for 40 minutes, the carbonaceous deposits have good wetting, softening and stripping effects, then, the dispersing detergent cleaning solution is adopted to continuously spray the carbonaceous deposits with the pressure of 0.8Mpa for 10 minutes, and the cleaned deposits are dispersed and carried away, so that secondary pollution to the air inlet channel and the air inlet valve is avoided.
3. When the components of the benzoyl polyisobutene amine, the lanthanum isooctanoate, the cerium isooctanoate and the dimethyl carbonate are reduced in proportion, the cleaning rate is obviously reduced; when the components of benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate and dimethyl carbonate are increased in proportion, the cleaning rate is not obviously improved.
4. When the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 0 percent, and the heptane is 76.38 percent, the cleaning rate is found to reach 75 percent by detecting according to a simulation test method of the deposit of the gasoline engine intake valve;
5. when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 0 percent, the dimethyl carbonate is 3.50 percent and the heptane 77.44 percent, the cleaning rate is up to 74 percent by detecting according to a gasoline engine air inlet valve sediment simulation test method;
6. when the addition proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 0 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.50 percent and the heptane 79.09 percent, the cleaning rate is up to 74 percent by detecting according to a gasoline engine intake valve sediment simulation test method;
7. when the addition proportion of the benzoyl polyisobutene amine is 0%, the lanthanum isooctanoate is 6.21%, the cerium isooctanoate is 4.86%, the dimethyl carbonate is 3.50% and the heptane is 85.43%, the cleaning rate is 73% by detecting according to a gasoline engine intake valve sediment simulation test method;
8. when the adding proportion of the benzoyl polyisobutene amine is 12.55 percent, the lanthanum isooctanoate is 6.21 percent, the cerium isooctanoate is 4.86 percent, the dimethyl carbonate is 3.50 percent and the heptane is 72.88 percent, the cleaning rate is up to 86 percent by detecting according to a simulation test method of the deposit of the air inlet valve of the gasoline engine.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. The disassembly-free cleaning composition for the intake valve of the direct injection engine is characterized by comprising a cleaning dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
3-50% of benzoyl polyisobutene amine;
3-25% of lanthanum isooctanoate;
2-23% of cerium isooctanoate;
60-90% of a first carrier, wherein the first carrier is a hydrocarbon solvent with the distillation range of 60-90 ℃;
the dispersing detergent comprises the following components in percentage by mass:
6-30% of polyisobutenyl succinimide;
60-95% of second carrier, wherein the second carrier is a hydrocarbon solvent with the distillation range of 60-90 ℃.
2. The composition of claim 1, wherein the detergent dispersant comprises 6 to 20 mass% of benzoylpolyisobutene amine.
3. The composition of claim 1, wherein the detergent dispersant comprises lanthanum isooctanoate in an amount of 5 to 25% by mass.
4. The composition according to claim 1, wherein the detergent dispersant comprises 3 to 12% by mass of cerium isooctanoate.
5. The composition of claim 1, wherein the first carrier comprises dimethyl carbonate and heptane, and the initial boiling point of the heptane is greater than or equal to 80 ℃; the recovery temperature of 98 percent is less than or equal to 120 ℃.
6. The composition of claim 1, wherein the composition comprises a detergent dispersant and a dispersing detergent,
wherein,
the detergent dispersant comprises the following components in percentage by mass:
12.55 percent of benzoyl polyisobutene amine;
6.21 percent of lanthanum isooctanoate;
4.86% of cerium isooctanoate;
3.50 percent of dimethyl carbonate;
72.88 percent of heptane;
in the detergent dispersant, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃;
the dispersing detergent comprises the following components in percentage by mass:
9 percent of polyisobutenyl succinimide,
91% of heptane (the initial boiling point is more than or equal to 80, and the 98% recovery temperature is less than or equal to 120);
in the dispersing detergent, the initial boiling point of heptane is more than or equal to 80 ℃, and the 98 percent recovery temperature is less than or equal to 120 ℃.
7. A method for preparing a disassembly-free cleaning composition for an intake valve of a direct injection engine, wherein the composition is the composition according to any one of claims 1 to 6, and the method comprises the following steps:
putting the first carrier into a blending tank, and stirring at normal temperature, wherein the rotating speed is 40-60 r/min; adding in-process benzoyl polyisobutene amine, lanthanum isooctanoate, cerium isooctanoate and dimethyl carbonate in the stirring process, and then stirring for 30 minutes to obtain the clean dispersing agent;
putting the second carrier into a blending tank for stirring at normal temperature, wherein the rotating speed is set to be 40-60 r/min; and putting the polyisobutenyl succinimide into the tank body in the stirring process, and then stirring for 15 minutes to obtain the dispersing detergent.
8. A method of using a disassembly-free cleaning composition for an intake valve of a direct injection engine, said composition being as defined in any one of claims 1 to 6, comprising the steps of:
firstly, the cleaning dispersant is adopted to spray the engine air inlet channel at the pressure of 0.4Mpa, then the dispersing detergent is adopted to spray at the pressure of 0.8Mpa, and the cleaned sediment is dispersed and carried away.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110157505A (en) * | 2019-05-31 | 2019-08-23 | 钟幸华 | High cleaning fuel oil carbon distribution detersive and preparation method thereof |
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Application publication date: 20190521 |