CN101880586A - Composite of engine lubricant and preparation method thereof - Google Patents
Composite of engine lubricant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a composite of lubricant and a preparation method thereof, in particular to a composite of engine lubricant and a preparation method thereof, which belong to the lubricant technical field. Alkyl naphthalene and naphthenic bright stock are added to base oil and at the same time thiophosphoric acid molybdenum additive containing nitrogen, ashless dispersing agent boride, hydrostyrene-isoprene VI improver (Infineum SV 261) and the like are added. Through the mutual coordination of the components, the lubricant composite has obvious compatibility adaptability of a rubber sealing ring, engine oil leakage is avoided, gas blowby is prevented, the dynamic property of the engine is improved, engine oil consumption is reduced, the emission property of the engine is improved and the oil draining period of engine oil and the service life of the engine are prolonged. The invention is particularly applicable to the vehicles which have run more than 100000km or have been overhauled.
Description
Technical field
The present invention relates to a kind of lubricating oil composition and preparation method thereof, especially a kind of composition of engine oil also relates to its preparation method simultaneously, belongs to technical field of lubricating oil.
Background technology
According to investigations, the vehicle oil impregnate is a general phenomenon on market for automobiles, and in the middle of existing 1,200,000 taxis in the whole nation, oil oozes phenomenon to have 70% vehicle to exist to some extent; In 2,600 ten thousand private cars that possess in market, the oil impregnate ratio has also reached 15%; That is to say that the whole nation has more than 470 ten thousand car users to endure the puzzlement of oil impregnate problem to the fullest extent; The general squalid maintenance means of changing that adopt, not only cost is high, and is difficult to radical cure.On the problem of antiseep, the existing vehicle maintenance means in market can't both make things convenient for material benefit, efficiently solved the oil impregnate fault again up hill and dale.There is not a kind of machine oil can solve the oil impregnate problem of vehicle.Therefore develop a kind of engine oil of specific function, can make the performance boost of engine sealing, in theory, can develop a kind of new machine oil-old car special oil fully, solve the oil impregnate fault of vehicle.This will be the market that potential is very huge.
Summary of the invention
The present invention wants the technical solution problem to be: at the defective that prior art exists, propose a kind of lubricating oil composition of engine, on the basis of satisfying the requirement of APISJ gasoline engine oil, increased the energy-conservation effect of antiseep and anti-attrition, prescription is simple, and modulation is convenient.
Technical scheme of the present invention is as follows: a kind of composition of engine oil, mainly contain following components in weight percentage:
A.70～75% hydrotreating base oil, 8～12% high-pressure hydrogenation cycloalkyl bright stock and the base oil mixture of 5～10% alkylnaphthalenes;
B.3.5～4.5% boronation Ashless butyl diimide dispersant;
C.0.5～1.5% calcium sulfenyl phenolate;
D.0.5～1.5% calcium alkylbenzenesulfonate;
E.0.5～1.5% synthetic sulfonic acid magnesium;
F.0.3～0.6% nitrogenous thiophosphoric acid molybdenum;
G.0.5～1.5% zinc dialkyl dithiophosphate;
H.0.3～0.6% amine type oxidation inhibitor;
I.0.3～0.6% phenol type antioxidant.
Wherein, described boronation Ashless butyl diimide dispersant is to be that 1800 polyisobutene is a raw material with molecular weight, makes with chlorine, and its molecular structural formula is:
R is that molecular weight is 1800 polyisobutene in the formula.
The molecular structural formula of described nitrogenous thiophosphoric acid molybdenum is:
In the formula, R is for containing amino (NH
2) the alkyl of 8 carbon atoms.
The molecular structural formula of described amine type auxiliary anti-oxidant is:
R and R ' are respectively the alkyl that contains the 8-18 carbon atom in the formula.
The molecular structural formula of described phenol type antioxidant is:
R is the alkyl that contains 6-14 carbon atom in the formula.
The production method of the lubricating oil composition of engine of the present invention may further comprise the steps:
A. in described ratio hydrotreating base oil, high-pressure hydrogenation cycloalkyl bright stock and alkylnaphthalene are mixed, be warming up to 70～75 ℃, get base oil mixture;
B. with steps A
Compound is cooled to 60～65 ℃, add boronation Ashless butyl diimide dispersant, calcium sulfenyl phenolate, calcium alkylbenzenesulfonate, synthetic sulfonic acid magnesium, nitrogenous thiophosphoric acid molybdenum, zinc dialkyl dithiophosphate, amine type oxidation inhibitor and phenol type antioxidant, stir and promptly get product.
Wherein, after the described steps A, in base oil mixture, add viscosity index improver and pour point depressant, and stir.Among the described step B, stir 25～35min earlier; Add kilfoam, stir 10～20min once more.The intensification temperature is 75 ℃ in the described steps A; The cooling temperature is 65 ℃ among the step B, and churning time is 30min, and churning time is 15min once more.
The characteristics of engine oil composition of the present invention are:
1. used special base oil, comprised alkylnaphthalene and cycloalkyl bright stock, can effectively improve the swelling property of engine sealing, prevented oil impregnate, reduced noise, the oil film strength when having improved the engine operation simultaneously;
2. add nitrogenous thiophosphoric acid molybdenum additives, reduced and started wearing and tearing, had certain energy-saving effect;
3. use the ashless dispersant of boronation, not only had good dispersiveness, thermostability and oxidation-resistance, also had certain resistance to abrasion and swell rubber;
4. add hydrogenated base oil, reduced vaporization losses, improved fuel economy.
5. use hydrogenation styrene-isoprene viscosity index improver (Infineum SV261), had goodish shear stability, made the stable viscosity of machine oil, prevented the seepage of machine oil.
In order to satisfy the requirement of spark ignition passenger car lubricating oil, adjust the prescription of lubricating oil, each component is cooperatively interacted, the balance that keeps the composition over-all properties, the oil product rank that the present invention relates to is SJ 10W-40, and this product occupation rate on China market is higher, and the application region is wide.Its inner quality is that the prescription by basic oil composition and additive is determined that base oil is as the element of I. C. engine oil, and its composition and performance have direct influence to the quality of processed oil.The working range of 10W-40 multi-grade oil is very wide, winter, the oily temperature of crankcase and friction surface may be hanged down envrionment temperature during automobile starting, and after the high engine speeds operation, the oily Wen Gaoda in top land piston ring groove zone is more than 300 ℃, and this all needs base oil that good viscosity temperature characteristic is arranged.SJ level 10W-40 oil not only has strict requirement to low-temperature performancies such as pour point, low temperature viscosity, border pumpings, can require also very harsh to vaporization losses, the contour warm nature of high-temperature high shear viscosity simultaneously, only possessed the good high-temperature performance, just can help at high temperature keeping oil film, reduce machine members.Therefore key point of the present invention is to improve the swelling property of base oil to rubber seal, and the leak between the aged sealing member molecule is firmly blocked, and the machine oil molecule can't break through the obstruction of sealing member again, and the difficult problem of oil impregnate also just is readily solved.In hydrogenated base oil, to add and be no less than 15% naphthenic base oils and alkylnaphthalene.By selection to base oil, can guarantee that oil product has good viscosity temperature characteristic, selected base oil fractions should not be too heavy, however lighter distillate can cause product vaporization losses to become big.
Oxidation in use takes place in lubricating oil inevitably, and oxidation generates acid, causes corrosion; Oxidation generates greasy filth, colloid and lacquer shape thing and causes that easily being connected of piston ring and oil circuit stop up, and oxidation is the major cause that oil product degenerates, and has shortened work-ing life greatly.A key property of gasoline engine oil is an oxidation-resistance, and oxidation-resistance is good more, and the drain period is long more, and is more little to the infringement that engine may cause.SJ oil will pass through MS program IIIE, so the oxidation-resistance of oil product is had higher requirement, composite antioxidant can improve antioxidant effect.By to multiple oxidation inhibitor and compound after the laboratory simulation oxidation test, determine with zinc dialkyl dithiophosphate (ZDDP) to be primary antioxidant, compound with amine type oxidation inhibitor, dialkyl dithio amido formate oxidation inhibitor and phenol type antioxidant composition multicomponent system oxidation inhibitor, during consumption 1.8%, in oxide thin layer (TFOUT) experiment, oxidation induction period reaches 230min, has reached III E standard level.It is generally acknowledged that the oxidation inhibitor recombination energy with different mechanisms of action is replenished mutually, at different oxidation stages, performance antioxygenation separately, thus have synergy.SJ level fuel oil meter is decided phosphorus content and is not more than 0.1%, and this need control the content of ZDDP, must assist to add the antioxidant property that other oxidation inhibitor remedy oil product.
Add in the detergent-dispersant additive energy in the I. C. engine oil and acidic cpd, and can play solubilising, dissemination, thereby reduce and prevent the surface deposition of settling, improve the use properties of oil product at the running of an engine parts to high low temperature settling.Another technological difficulties of SJ oil are to solve black greasy filth.Car speed of a motor vehicle height, crankcase volume is little, the oil temperature is high, thereby produce black greasy filth problem, for addressing this problem, high-molecular weight Ashless butyl diimide dispersant and boronation Ashless butyl diimide dispersant have been selected for use, except having improved the high low temperature dispersing property of oil product, can also strengthen the resistance to corrosion of oil product, this is vital to thoroughly repaired engine.
The present invention with three kinds of calcium sulfonate with high base number (TBN 295), calcium sulfenyl phenolate (TBN 250), sulfonate with high base number magnesium (TBN 390) as metal detergent, because calcium salt and magnesium salts are compound, the lacquer deposit that high temperature is generated does not have big influence, use sulfonic acid magnesium can reduce the oil product ash content, improve rust-preventing characteristic.Above-mentioned three kinds of additives are reasonably combined, and consumption can reach the high temperature detergent performance requirement of SJ oil at 2.1% o'clock.
Hyundai Motor at a high speed and low speed to intersect the situation of travelling repeatedly increasing, the high and low temperature throw out of gasoline engine oil exists simultaneously, this requires the dispersion agent in the gasoline engine oil can disperse the high and low temperature throw out simultaneously.Because the program VE bench testing condition of evaluation SJ level oil product dispersiveness is harsher than program VD, low temperature is lower, high temperature is higher, test period is longer, and has increased the rocker arm bonnet sludge rating.Its low thermophase particularly, temperature is lower than the dew point of water, and steam is easier to be condensed, and is more conducive to the formation of water.For solving the simultaneous problem of high low temperature greasy filth, the present invention has taked to increase the dosage of ashless dispersant and has improved the measure that prescription is formed.
Another key point of the present invention is to have added the nitrogenous thiophosphoric acid molybdenum of anti-friction composition, travel more than 100,000 kilometers or thoroughly repaired engine and the performance of newly starting difference to some extent,, reduce noise in order to prevent the wearing and tearing of parts, increased anti-friction composition, its effect is self-evident.
During modulation lubricating oil, except adding additive of the present invention, also need to add pour point depressant, viscosity index improver and kilfoam.What viscosity index improver was suitable is the good hydrogenation styrene-isoprene multipolymer of shear stability, and as the Infineum SV261 of import profit Ying Lian company, oil product kinematic viscosity (100 ℃) is controlled at 15mm/s
2More than, addition is 5.5%.Pour point depressant can be selected the import agent goldschmidt chemical corporation 1-248 good to base oil susceptibility, and addition is 0.3%.Kilfoam generally is home-made methyl-silicone oil T901, and addition is 20ppm.The binder component that chooses can't solve the problem to be solved in the present invention fully.The present invention utilizes interactional principle between the well-known binder component, make every effort to each functional additive except the performance of giving full play to himself effect a bit, satisfying aspect the every performance requriements of engine, particularly, make stronger " synergistic effect " of generation between each functional additive component as far as possible to improving the dispersed aspect of soot in the machine oil.Above-mentioned prescription always added dosage at 7.8% o'clock, and (not comprising pour point depressant, viscosity index improver and kilfoam), passed through the associated stand evaluation of APISJ oil, satisfied the specification of quality requirement of API SJ oil.
The invention has the beneficial effects as follows: by the mutual cooperation between each component, make lubricating oil composition have the compatible adaptability of outstanding rubber seal, prevent oil leakage; Prevent the gas blowby of combustion gas, improved the dynamic property of engine; The engine oil consumption that reduces has improved engine emission, has prolonged oil draining period and engine work-ing life of machine oil, is specially adapted to travel more than 100,000 kilometers or thoroughly repaired vehicle.
Embodiment
Each component product is market and buys in following examples of the present invention, and wherein, high-pressure hydrogenation cycloalkyl bright stock is by CNPC's Kelamayi refinery production, below repeats no more.
Embodiment one
Prepare a total composition lubricating oil composition, called after " antiseepage treasured " 10W-40 coils the clean prestige SJ 15W-40 of lubricating oil in contrast with existing dragon,
Compound method is as follows: base oil (how are hydrogenated base oil, high-pressure hydrogenation bright stock, alkyl) is squeezed in proportion be in harmonious proportion in the still, be warming up to 75 ℃, add viscosity index improver (SV-261) and pour point depressant (1-248) more in proportion, stirred 30 minutes; Be cooled to 65 ℃, add detergent-dispersant additive (boronation Ashless butyl diimide dispersant, calcium sulfenyl phenolate, calcium alkylbenzenesulfonate, synthetic sulfonic acid magnesium), antioxygen anti-wear agent (nitrogenous thiophosphoric acid molybdenum, zinc dialkyl dithiophosphate, amine type oxidation inhibitor, phenol type antioxidant) respectively, stir and add kilfoam (T901) after 30 minutes; Restir went out product after 15 minutes.
Its data such as table 1:
Table 1
| The additive title | Embodiment 1 | Reference oil | |
| Component, % (weight) | Hydrotreating base oil high-pressure hydrogenation cycloalkyl bright stock alkylnaphthalene boronation Ashless butyl diimide dispersant calcium sulfenyl phenolate calcium alkylbenzenesulfonate synthesizes the nitrogenous thiophosphoric acid molybdenum of sulfonic acid magnesium zinc dialkyl dithiophosphate amine type oxidation inhibitor phenol type antioxidant viscosity index improver SV 261 pour point depressant 1-248 | Surplus 10 5 3.8 0.7 0.7 0.5 0.3 0.5 0.3 0.5 5.5 0.3 | The dragon clean prestige SJ 15W-40 of lubricating oil that coils |
| Kilfoam T901 | 20ppm | ||
| Real train test is 6000km as a result | 20 taxis (Changchun one vapour red flag board car), actual service life is the vehicle above 200,000 kilometers same batch all. | Removing has a slight oil impregnate phenomenon is arranged, and other all do not have the oil impregnate phenomenon, compares the latter and reduces noise, and power improves, than reference oil energy-conservation about 1% | 19 the oil impregnate phenomenon occurs |
Embodiment two
Prepare a total composition lubricating oil composition, called after " antiseepage treasured " 10W-40, compound method is coiled the clean prestige SJ 15W-40 of lubricating oil in contrast, its data such as table 2 with embodiment one with existing dragon:
Table 2
| The additive title | Embodiment 2 | Reference oil | |
| Component, % (weight) | Hydrotreating base oil high-pressure hydrogenation cycloalkyl bright stock alkylnaphthalene boronation Ashless butyl diimide dispersant calcium sulfenyl phenolate calcium alkylbenzenesulfonate synthesizes the nitrogenous thiophosphoric acid molybdenum of sulfonic acid magnesium zinc dialkyl dithiophosphate amine type oxidation inhibitor phenol type antioxidant viscosity index improver SV 261 pour point depressant 1-248 kilfoam T901 | Surplus 8 10 3.5 0.5 1.5 0.7 0.5 1.0 0.5 0.3 5.5 0.3 20ppm | The dragon clean prestige SJ 15W-40 of lubricating oil that coils |
| Real train test is 6000km as a result | 20 taxis (Changchun one vapour red flag board car), actual service life is the vehicle above 200,000 kilometers same batch all. | All do not have the oil impregnate phenomenon, compare the latter and reduce noise, power improves, than reference oil energy-conservation about 1% | 19 the oil impregnate phenomenon occurs |
Embodiment three
Prepare a total composition lubricating oil composition, called after " antiseepage treasured " 10W-40, compound method is coiled the clean prestige SJ 15W-40 of lubricating oil in contrast, its data such as table 3 with embodiment one with existing dragon:
Table 3
| The additive title | Embodiment 3 | Reference oil | |
| Component, % (weight) | Hydrotreating base oil high-pressure hydrogenation cycloalkyl bright stock alkylnaphthalene boronation Ashless butyl diimide dispersant calcium sulfenyl phenolate calcium alkylbenzenesulfonate synthesizes the nitrogenous thiophosphoric acid molybdenum of sulfonic acid magnesium zinc dialkyl dithiophosphate amine type oxidation inhibitor phenol type antioxidant viscosity index improver SV 261 pour point depressant 1-248 kilfoam T901 | Surplus 12 8 4.2 0.6 1.0 1.5 0.3 1.0 0.6 0.4 5.5 0.3 20ppm | The dragon clean prestige SJ 15W-40 of lubricating oil that coils |
| The additive title | Embodiment 3 | Reference oil | |
| Real train test is 6000km as a result | 20 taxis (Changchun one vapour red flag board car), actual service life is the vehicle above 200,000 kilometers same batch all. | Removing three has slight oil impregnate phenomenon, and other all do not have the oil impregnate phenomenon, compares the latter and reduces noise, and power improves, than reference oil energy-conservation about 1% | 19 the oil impregnate phenomenon occurs |
Embodiment four
Prepare a total composition lubricating oil composition, called after " antiseepage treasured " 10W-40, compound method is coiled the clean prestige SJ 15W-40 of lubricating oil in contrast, its data such as table 4 with embodiment one with existing dragon:
Table 4
| The additive title | Embodiment 4 | Reference oil | |
| Component, % (weight) | Hydrotreating base oil high-pressure hydrogenation cycloalkyl bright stock alkylnaphthalene boronation Ashless butyl diimide dispersant calcium sulfenyl phenolate calcium alkylbenzenesulfonate synthesizes the nitrogenous thiophosphoric acid molybdenum of sulfonic acid magnesium zinc dialkyl dithiophosphate amine type oxidation inhibitor phenol type antioxidant viscosity index improver SV 261 pour point depressant 1-248 kilfoam T901 | Surplus 11 7 4.5 1.5 0.6 1.0 0.6 1.5 0.4 0.6 5.5 0.3 20ppm | The dragon clean prestige SJ 15W-40 of lubricating oil that coils |
| Real train test is 6000km as a result | 20 taxis (Changchun one vapour red flag board car), actual service life is the vehicle above 200,000 kilometers same batch all. | All do not have the oil impregnate phenomenon, compare the latter and reduce noise, power improves, than reference oil energy-conservation about 1% | 19 the oil impregnate phenomenon occurs |
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (10)
1. the composition of an engine oil, mainly contain following components in weight percentage:
A.70～75% hydrotreating base oil, 8～12% high-pressure hydrogenation cycloalkyl bright stock and the base oil mixture of 5～10% alkylnaphthalenes;
B.3.5～4.5% boronation Ashless butyl diimide dispersant;
C.0.5～1.5% calcium sulfenyl phenolate;
D.0.5～1.5% calcium alkylbenzenesulfonate;
E.0.5～1.5% synthetic sulfonic acid magnesium;
F.0.3～0.6% nitrogenous thiophosphoric acid molybdenum;
G.0.5～1.5% zinc dialkyl dithiophosphate;
H.0.3～0.6% amine type oxidation inhibitor;
I.0.3～0.6% phenol type antioxidant.
2. according to the composition of the described engine oil of claim 1, it is characterized in that: the molecular structural formula of described boronation Ashless butyl diimide dispersant is:
R is that molecular weight is 1800 polyisobutene in the formula.
3. according to the composition of the described engine oil of claim 1, it is characterized in that: the molecular structural formula of described nitrogenous thiophosphoric acid molybdenum is:
In the formula, R is for containing amino (NH
2) the alkyl of 8 carbon atoms.
4. according to the lubricating oil composition of the described engine of claim 1, it is characterized in that: the molecular structural formula of described amine type oxidation inhibitor is:
R and R ' are respectively the alkyl that contains the 8-18 carbon atom in the formula.
5. according to the lubricating oil composition of the described engine of claim 1, it is characterized in that: the molecular structural formula of described phenol type antioxidant is:
R is the alkyl that contains 6-14 carbon atom in the formula.
6. according to the lubricating oil composition of the arbitrary described engine of claim 1 to 5, it is characterized in that also containing the following component that accounts for overall weight per-cent: the kilfoam of 5.5% viscosity index improver, 0.3% pour point depressant and 20ppm.
7. according to the preparation method of the lubricating oil composition of the described engine of claim 6, may further comprise the steps:
A. in described ratio hydrotreating base oil, high-pressure hydrogenation cycloalkyl bright stock and alkylnaphthalene are mixed, be warming up to 70～75 ℃, get base oil mixture;
B. the mixture with steps A is cooled to 60～65 ℃, add boronation Ashless butyl diimide dispersant, calcium sulfenyl phenolate, calcium alkylbenzenesulfonate, synthetic sulfonic acid magnesium, nitrogenous thiophosphoric acid molybdenum, zinc dialkyl dithiophosphate, amine type oxidation inhibitor and phenol type antioxidant, stir and promptly get product.
8. according to the production method of the lubricating oil composition of the described engine of claim 7, it is characterized in that: after the described steps A, in base oil mixture, add viscosity index improver and pour point depressant, and stir.
9. the production method of the lubricating oil composition of described engine according to Claim 8 is characterized in that: among the described step B, stir 25～35mi n earlier; Add kilfoam, stir 10～20min once more.
10. according to the production method of the lubricating oil composition of the arbitrary described engine of claim 7 to 9, it is characterized in that: the intensification temperature is 75 ℃ in the described steps A; The cooling temperature is 65 ℃ among the step B, and churning time is 30min, and churning time is 15min once more.
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