CN101705144A - Lubricating oil for methanol fuel engine and preparation method thereof - Google Patents
Lubricating oil for methanol fuel engine and preparation method thereof Download PDFInfo
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Abstract
The invention provides lubricating oil for a methanol fuel engine, which comprises the following components in percentage by weight: metal detergent 2.2-5.2, ashless dispersant 3.5-6.8, antioxidant and anticorrosion agent 0.5-1.6, high-temperature antioxidant 0.3-0.8, viscosity index improver 6-11, oiliness solvent 2.8-6, anti-foaming agent 120ppm, metal anti-rust agent 0.3-0.7, base oil 62.7-83, demulsifying agent 0.1-0.3, metal extreme pressure anti-wear agent 1.0-4 and pour point depressant 0.3-0.9. The lubricating oil of the invention has functions of preventing wear and rust of the engine, can prevent the active ingredients thereof from being extracted and emulsified by methanol and is particularly suitable for engines using M85 or M100 methanol gasoline as a fuel.
Description
Technical field
The present invention relates to a kind of lubricating oil, relate in particular to a kind of lubricating oil that is used for methanol-fueled engine and preparation method thereof.
Technical background
Oil is fewer and feweri as a kind of Nonrenewable resources margin, and follows the development of world economy, and the application of petroleum derivation product more and more widely.But like this to the key subjects of being developed to of petroleum resources substitute products for world technology circle.Methyl alcohol temporarily can reduce the application percentage of petroleum resources as a kind of coal sell of one's property product.At present, along with the continuous enhancing of whole world environmental consciousness, control air quality, control motor vehicle exhaust become an important step of protection environment.And the level of the engine exhaust emission pollutent that acts as a fuel with methyl alcohol is very low, thus methyl alcohol all there is application in each country in the world as a kind of fuel of engine.China has also listed methanol fuel in the state key promotion project, and in 2009-11-1 the formal national standard by methanol fuel.So more help the popularization and the application of methanol gasoline.But when methyl alcohol acted as a fuel, engine lubrication system can produce a series of technical problem.For example: corrosion, wearing and tearing, the engine cold-start interior methyl alcohol inflow of part cylinder crankcase at need appears in engine, and then lubricating oil is directly contacted with methyl alcohol, lubricating oil is polluted, and lubricating oil effective constituent is extracted, promptly cause the forfeiture of lubricating oil function.Simultaneously, make lubricating oil phenomenons such as alkali is lost, emulsification occur after compositions such as methanol fuel burning back deutero-water, methyl alcohol enter crankcase easily.Therefore existing commercially available lubricating oil can not be applicable to that methyl alcohol makes the engine of fuel, makes development and exploitation be applicable to that the new lubricating oil of methanol-fueled engine becomes a kind of urgent demand thus.
The disclosed additive composition for lubricant oil of Chinese patent literature CN1197943C, having considered the characteristics of alcohol fuel provides the lubricating oil composition that is applicable to the alcohol fuel engine.What the disclosed engine oil composition of Chinese patent literature CN100344739C was primarily aimed at is existing diesel motor.So lubricating oil composition that does not also propose in China at methanol-fueled engine.
Summary of the invention
The objective of the invention is to: a kind of lubricating oil that is used for methanol-fueled engine is provided, can not only plays wear-resistant, antirust effect, and can avoid extraction and the emulsification of methyl alcohol its effective constituent to engine.
Another object of the present invention is: the preparation method that a kind of described lubricating oil is provided.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of lubricating oil that is used for methanol-fueled engine is provided, and it is made up of following components in weight percentage:
Metal detergent 2.2%-5.2% antioxidant preservative 0.5%-1.6%
Ashless dispersant 3.5%-6.8% high-temperature antioxidant 0.3%-0.8%
Viscosity index improver 6%-11% base oil 62.7%-83%
The anti-emulsion 0.1%-0.3% of oiliness improver 2.8%-6%
Kilfoam 120ppm metal extreme pressure anti-wear additives 1.0%-4%
Metal antirusting agent 0.3%-0.7% pour point depressant 0.3%-0.9%
Described lubricating oil preferably is made up of following components in weight percentage:
Metal detergent 4.8% kilfoam 120ppm
Ashless dispersant 3.6% metal antirusting agent 0.3%
Antioxidant preservative 1.5% base oil 76.05%
High-temperature antioxidant 0.6% anti-emulsion 0.15%
Viscosity index improver 8% metal extreme pressure anti-wear additives 1.9%
Oiliness improver 2.8% pour point depressant 0.3%
The preferred base number of described metal detergent is the metal detergent of 200-400; A kind of in further preferred calcium alkylbenzenesulfonate or the synthetic sulfonic acid magnesium.
A kind of in preferred mono alkenyl succimide of described ashless dispersant or the diene base succimide.
The preferred long-chain primary alkyl of described antioxidant preservative zinc dithiophosphate.
The mixture of one or more in described high-temperature antioxidant preferred alkyl pentanoic, octyl diphenylamine or the amyl group pentanoic.
The preferred 100 ℃ of kinematic viscosity of described base oil are at 9mm
2/ s-11mm
2The base oil of/s, the basic secondary hydrogenated base oil of further preferred dewaxing, its viscosity index greater than 95, flash-point is higher than 220 ℃.
The preferred polymethacrylate of described viscosity index improver.
The preferred 124 Triazole lipid acid of described oiliness improver amine salt.
Preferred barium mahogany sulfonate of described metal antirusting agent or benzotriazole.
The preferred non-silicon kilfoam of described kilfoam, further preferred polypropylene acid esters.
Described extreme pressure anti-wear additives preferably phosphoric acid front three phenolic ester or di-n-butyl phosphite.
The preferred polyalphaolefin of described pour point depressant is as T803B, T803C.
The preferred T1001 of described anti-emulsion.
The present invention also provides the preparation method of described lubricating oil, may further comprise the steps:
1) but the base oil of described ratio is squeezed in the device of heated and stirred, heat to 75 ℃, constant temperature stirred 1 hour;
2) viscosity index improver of the described ratio of adding in the material that step 1) obtains is heated to 80 ℃, and constant temperature stirred 30 minutes;
3) with step 2) the mixture temperature drop to 75 that obtains ℃, according to described ratio add metal detergent,
Ashless dispersant, antioxidant preservative, high-temperature antioxidant, metal antirusting agent, anti-emulsion and extreme pressure anti-wear additives, oiliness improver and pour point depressant, 75 ℃ were stirred 20 minutes down;
4) kilfoam that adds described ratio in the mixture that step 3) obtains stirred 30 minutes;
5) mixture that step 4) is obtained is done 1 hour after-filtration of pre-shearing, detection with shears, last in slurry tank sedimentation promptly obtain the described lubricating oil that is used for methanol-fueled engine after 24 hours.
Lubricating oil of the present invention can be applied to methanol-fueled engine, and being particularly useful for M85, M100 methanol gasoline is the engine of fuel.
Adopt multiple additives components such as metal detergent, ashless dispersant, antioxidant preservative, high-temperature antioxidant, anti-emulsion, viscosity index improver, extreme pressure anti-wear additives, oiliness improver, pour point depressant in the proportioning of lubricating oil of the present invention, given full play to consistency and Harmony between each additive.
Compare with lubricating oil of the prior art, lubricating oil of the present invention has following beneficial effect:
1. the aging and emulsification that can resist methyl alcohol destroys
Generally, methanol fuel can enter cylinder at need at engine cold-starting, and methyl alcohol wherein can enter in the lubricating oil along casing wall, causes the destruction to lubricating oil medium viscosity index improving agent OCP (binary ethylene-propylene copolymer).And lubricating oil of the present invention is owing to selected specific viscosity index improver (polymethacrylate) for use, it can prevent the modification of methyl alcohol to OCP in the conventional lubrication oil (binary ethylene-propylene copolymer), thereby can resist the rapid ageing of the lubricating oil that methyl alcohol causes when methyl alcohol contacts with lubricating oil.Simultaneously, lubricating oil of the present invention is highly resistant to methyl alcohol to emulsification of lubricating oils by selecting novel anti infusion and anti-emulsion for use.
2. can resist the extraction of methyl alcohol
Owing to selected the ashless dispersant and the metal detergent of high base number for use in the lubricating oil of the present invention, enter in the crankcase extraction to alkali content in the lubricating oil so can resist formic acid that methyl alcohol produces after burning.
3. can resist the pollution that methanol fuel causes lubricating oil
Lubricating oil is the charcoal nitrogen compound, and in case of producing emulsion reaction after the water dirt, based on this, the present invention adds the anti-emulsion of doses in lubricating oil, can very fast decomposition moisture and lubricating oil mixed.In addition, also added super base number metal detergent, can effectively resist of the neutralization of the formic acid of methyl alcohol burning back generation the lubricating oil alkali content.Therefore lubricating oil of the present invention can effectively be resisted the pollution to lubricating oil of entering of methyl alcohol and methyl alcohol burning back derived material.
4. has good abrasion resistance of metal performance
Lubricating oil of the present invention also has the good metal abrasion resistance when having had above-mentioned many beneficial effects, can reduce the engine parts wearing and tearing.
Unusual effect below by concrete test and test proof lubricating oil of the present invention.
With the methanol gasoline engine lubricating oil of the embodiment of the invention 1 and 15W40 SG level same level petrol engine lubricating oil by national standard (GB11121-2006) compare property testing, the test of driving comparative, engine rig test.Its result shows, under the situation that large-proportion methanol acts as a fuel, lubricants performance of the present invention will be far superior to 15W40 petrol engine lubricating oil, be the most significantly, in the real train test, the oil-bound film wear resistance height (showing that mainly resistance is little in the start-up course, startup is smooth and easy, noise is low) of lubricating oil of the present invention engine shaft piston ring during to engine cold-start.
Can clearly embody the marked improvement that the existing relatively regular gasoline engine of lubricating oil of the present invention SG 15W40 lubricating oil is had by the experimental result among the following table 1-3.
The actual driving test of test 1.M85 methanol-fueled engine
Open on the inferior 1.6L engine in Korea S and to test, car on probation is Shanxi Province's Yuncheng taxi (a Qi Ya 1.6L car), and this car fuel oil is the M85 methanol fuel.To try out car and be divided into two groups, every group of lubricating oil that uses is respectively the lubricating oil and the 15W40SG petrol engine lubricating oil of the embodiment of the invention 1; Wherein each group is further divided into 4000km and two groups of 6000km, every group of 3 cars again.After 4000 kilometers of each 4000km group car operations on probation, open and inspect through repairman shop; After 6000 kilometers of each 6000km group car operations on probation, also open and inspect through repairman shop.The result shows that the related data contrast difference of the driving 4000km-6000km of the lubricating oil of the embodiment of the invention 1 and 15W40SG petrol engine lubricating oil is remarkable, specifically sees Table 1.
The performance of table 1. lubricating oil of the present invention and 15W40SG machine oil is (4000km/6000km) relatively
The actual driving test of test 2.M100 methanol-fueled engine
Process of the test is 1 identical with test, only is to use the lubricating oil of the embodiment of the invention 2 and 15W40 SG machine oil as specimen; The methanol fuel that engine uses is the M100 methanol fuel; Running distance is 5000km.The result is as shown in table 2 below.
The performance of table 2. lubricating oil of the present invention and 15W40SG machine oil is (5000km) relatively
From above two actual driving test results as can be seen, when M85 and M100 make fuel, after lubricating oil emitted, SG 15W40 petrol engine lubricating oil can find out that obvious wearing out arranged on color, illustrate that effective constituent wherein fallen by methanol extraction, lubricating oil has been lost the lubricating effect in equipment; And being subjected to methyl alcohol under the same conditions, the lubricating oil of the embodiment of the invention 1 significantly do not corrode.Illustrate that lubricating oil of the present invention will be far superior to same level SG 15W40 petrol engine oil on performance.
Table 3. engine rig test index test result
As can be seen from the above table, the every stand index of the lubricating oil of the embodiment of the invention 1 all is far superior to SG level 15W40 oil, and meets national normal value.
Embodiment
Embodiment 1.
A kind of being applied to the M85 methanol gasoline is the lubricating oil of the engine of fuel, and it is composed of the following components:
Calcium alkylbenzenesulfonate 4.8kg defoamer 120ppm
Mono alkenyl succimide 3.6kg barium mahogany sulfonate 0.3kg
The long-chain primary alkyl zinc dithiophosphate 1.5kg basic secondary hydrogenated base oil 76.05kg that dewaxes
Octyl diphenylamine 0.6kg T1001 0.15kg
Polymethacrylate 8kg tritolyl phosphate 1.9kg
124 Triazole lipid acid amine salt 2.8kg T803B 0.3kg
Prepare described lubricating oil in accordance with the following methods:
1) but the dewaxing base secondary hydrogenated base oil of 76.05kg is squeezed in the device of heated and stirred, heat to 75 ℃, constant temperature stirred 1 hour;
2) polymethacrylate of adding 8kg in the material that step 1) obtains is heated to 80 ℃, and constant temperature stirred 30 minutes;
3) with step 2) the mixture temperature drop to 75 that obtains ℃, the T803B that adds 4.8kg calcium alkylbenzenesulfonate, 3.6kg mono alkenyl succimide, 1.5kg long-chain primary alkyl zinc dithiophosphate, 0.6kg octyl diphenylamine, 0.3kg barium mahogany sulfonate, 0.15kgT1001,1.9kg tritolyl phosphate, 2.8kg 124 Triazole lipid acid amine salt and 0.3kg, 75 ℃ were stirred 20 minutes down;
4) adding the 120ppm kilfoam in the mixture that step 3) obtains stirred 30 minutes;
5) mixture that step 4) is obtained is done 1 hour after-filtration of pre-shearing, detection with shears, last in slurry tank sedimentation promptly obtain the lubricating oil of the described M85 of being used for methanol-fueled engine after 24 hours.
Embodiment 2.
A kind of being applied to the M100 methanol gasoline is the lubricating oil of the engine of fuel, and it is composed of the following components:
Synthetic sulfonic acid magnesium 2.2kg polyacrylic ester 120ppm
Diene base succimide 3.6kg benzotriazole 0.3kg
The long-chain primary alkyl zinc dithiophosphate 0.6kg basic secondary hydrogenated base oil 82.3kg that dewaxes
Octyl diphenylamine 0.3kg T1001 0.1kg
Polymethacrylate 6.2kg di-n-butyl phosphite 1.2kg
124 Triazole fatty acid ammonium salt 2.8kg T803C 0.4kg
Prepare described lubricating oil in accordance with the following methods:
1) but the dewaxing base secondary hydrogenated base oil of 82.3kg is squeezed in the device of heated and stirred, heat to 75 ℃, constant temperature stirred 1 hour;
2) polymethacrylate of adding 6.2kg in the material that step 1) obtains is heated to 80 ℃, and constant temperature stirred 30 minutes;
3) with step 2) the mixture temperature drop to 75 that obtains ℃, the T803C that adds the synthetic sulfonic acid magnesium of 2.2kg, 3.6kg diene base succimide, 0.6kg long-chain primary alkyl zinc dithiophosphate, 0.3kg octyl diphenylamine, 0.3kg benzotriazole, 0.1kg T1001 and 1.2kg di-n-butyl phosphite, 2.8kg 124 Triazole lipid acid amine salt and 0.4kg, 75 ℃ were stirred 20 minutes down;
4) adding the 120ppm polyacrylic ester in the mixture that step 3) obtains stirred 30 minutes;
5) mixture that step 4) is obtained is done 1 hour after-filtration of pre-shearing, detection with shears, last in slurry tank sedimentation promptly obtain the lubricating oil of the described M100 of being used for methanol-fueled engine after 24 hours.
Embodiment 3.
A kind of being applied to the M100 methanol gasoline is the lubricating oil of the engine of fuel, and it is composed of the following components:
Synthetic sulfonic acid magnesium 5.0kg diene base succimide 6.6kg
Long-chain primary alkyl zinc dithiophosphate 1.6kg benzotriazole 0.5kg
The amyl group pentanoic 0.8kg basic secondary hydrogenated base oil 64.95kg that dewaxes
Polymethacrylate 10.2kg T1001 0.25kg
124 Triazole lipid acid amine salt 5.6kg di-n-butyl phosphite 3.8kg
Polyacrylic ester 120ppm T803B 0.7kg
Prepare described lubricating oil in accordance with the following methods:
1) but the dewaxing base secondary hydrogenated base oil of 64.95kg is squeezed in the device of heated and stirred, heat to 75 ℃, constant temperature stirred 1 hour;
2) polymethacrylate of adding 10.2kg in the material that step 1) obtains is heated to 80 ℃, and constant temperature stirred 30 minutes;
3) with step 2) the mixture temperature drop to 75 that obtains ℃, the T803B that adds the synthetic sulfonic acid magnesium of 5.0k, 6.6kg diene base succimide, 1.6kg long-chain primary alkyl zinc dithiophosphate, 0.8kg amyl group pentanoic, 0.5kg benzotriazole, 0.25kg T1001 and 3.8kg di-n-butyl phosphite, 5.6kg 124 Triazole lipid acid amine salt and 0.7kg, 75 ℃ were stirred 20 minutes down;
4) adding the 120ppm polyacrylic ester in the mixture that step 3) obtains stirred 30 minutes;
5) mixture that step 4) is obtained is done 1 hour after-filtration of pre-shearing, detection with shears, last in slurry tank sedimentation promptly obtain the lubricating oil of the described M100 of being used for methanol-fueled engine after 24 hours.
Claims (8)
1. a lubricating oil that is used for methanol-fueled engine is characterized in that, it is made up of following components in weight percentage:
Metal detergent 2.2%-5.2% kilfoam 120ppm
Ashless dispersant 3.5%-6.8% metal antirusting agent 0.3%-0.7%
Antioxidant preservative 0.5%-1.6% base oil 62.7%-83%
The anti-emulsion 0.1%-0.3% of high-temperature antioxidant 0.3%-0.8%
Viscosity index improver 6%-11% metal extreme pressure anti-wear additives 1.0%-4%
Oiliness improver 2.8%-6% pour point depressant 0.3%-0.9%
2. the described lubricating oil of claim 1 is characterized in that, it is made up of following components in weight percentage:
Metal detergent 4.8% kilfoam 120ppm
Ashless dispersant 3.6% metal antirusting agent 0.3%
Antioxidant preservative 1.5% base oil 76.05%
High-temperature antioxidant 0.6% anti-emulsion 0.15%
Viscosity index improver 8% metal extreme pressure anti-wear additives 1.9%
Oiliness improver 2.8% pour point depressant 0.3%
3. the described lubricating oil of claim 1, it is characterized in that: described metal detergent is the metal detergent of base number between 200-400; Described ashless dispersant is mono alkenyl succimide or diene base succimide; Described antioxidant preservative is a long-chain primary alkyl zinc dithiophosphate; Described base oil is that 100 ℃ of kinematic viscosity are at 9mm
2/ s-11mm
2The base oil of/s; Described viscosity index improver is a polymethacrylate; Described metal antirusting agent is barium mahogany sulfonate or benzotriazole; Described kilfoam is non-silicon kilfoam; Described extreme pressure anti-wear additives is tritolyl phosphate or di-n-butyl phosphite; Described anti-emulsion is T1001; Described high-temperature antioxidant is one or more the mixture in alkyl diphenylamine, octyl diphenylamine or the amyl group pentanoic; Described oiliness improver is a 124 Triazole lipid acid amine salt; Described pour point depressant is a polyalphaolefin.
4. the described lubricating oil of claim 3 is characterized in that: described base number is a kind of in calcium alkylbenzenesulfonate or the synthetic sulfonic acid magnesium at the metal detergent of 200-400.
5. the described lubricating oil of claim 3 is characterized in that: described base oil is the basic secondary hydrogenated base oil of dewaxing.
6. the described lubricating oil of claim 3, it is characterized in that: described non-silicon kilfoam is the polypropylene acid esters.
7. the described lubricating oil of claim 3, it is characterized in that: described polyalphaolefin is commercially available T803B or T803C.
8. the preparation method of the described lubricating oil of claim 1 may further comprise the steps:
1) but the base oil of described ratio is squeezed in the device of heated and stirred, heat to 75 ℃, constant temperature stirred 1 hour;
2) viscosity index improver of the described ratio of adding in the material that step 1) obtains is heated to 80 ℃, and constant temperature stirred 30 minutes;
3) with step 2) the mixture temperature drop to 75 that obtains ℃, add metal detergent, ashless dispersant, antioxidant preservative, high-temperature antioxidant, metal antirusting agent, anti-emulsion and extreme pressure anti-wear additives, oiliness improver and pour point depressant according to described ratio, 75 ℃ were stirred 20 minutes down;
4) kilfoam that adds described ratio in the mixture that step 3) obtains stirred 30 minutes;
5) mixture that step 4) is obtained is done 1 hour after-filtration of pre-shearing, detection with shears, last in slurry tank sedimentation promptly obtain the described lubricating oil that is used for methanol-fueled engine after 24 hours.
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