CN109536266A - A kind of processing method reducing acid value of lubricating oil - Google Patents
A kind of processing method reducing acid value of lubricating oil Download PDFInfo
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- CN109536266A CN109536266A CN201710857325.5A CN201710857325A CN109536266A CN 109536266 A CN109536266 A CN 109536266A CN 201710857325 A CN201710857325 A CN 201710857325A CN 109536266 A CN109536266 A CN 109536266A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/06—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a kind of processing methods for reducing acid value of lubricating oil.It include: the inorganic agent that uses is the polymer containing vinyl monomer structural unit and acrylate structural unit；The vinyl monomer structural unit has structure shown in formula (1):
Description
Technical field
The present invention relates to lubricating oil processing technology fields, further say, are to be related to a kind of place for reducing acid value of lubricating oil
Reason method.
Background technique
Lubricating oil is a kind of critically important oil product.The various types of lubricating oil, but be all based on base oil simultaneously
Suitable various additives are added and manufactured.For the lube base oil produced from crude oil, by crude oil classification by its quality
Standard is divided into paraffin base oil series, intermediate base base oil series and naphthenic base oils series.
Lubricating oil is other than requiring certain viscosity, it is also necessary to there are preferable property of viscosity versus temperature and anti-oxidative stability,
And lower carbon residue.In order to meet above-mentioned requirements, it is necessary to remove most of polycyclic short-side chain fragrance from crude lube stock
Hydrocarbon and colloid, to improve the quality of lubricating oil, this process is known as lube oil finishing.Common refining methd has: acid-alkali refining,
Solvent refining, adsorption refining, hydrofinishing etc..
The inorganic agent that solvent refining all uses in the prior art is usually ethylene oxide, lighter hydrocarbons, surfactant etc., solvent
The advantages that purification has refining effect good, adapts to wide scope of material, and production is easy, cheap, but there is also the yields of purification
It is low, some shortcomings such as depickling poor selectivity.And with the expansion of heavy crude exploitation scale in recent years, lube cut oil
The deficiency of amount decline, lubricating oil solvent more highlights.
The acid value of lubricating oil is the quality index for indicating organic acid total content in lubricating oil, and acid value is exactly to neutralize 1 gram of petroleum
Potassium hydroxide milligram number needed for product.The size of acid value variation is commonly used to measure oil ageing stability.Lubricate oleic acid
Value is big, indicates that the organic acid content of lubricating oil is high, it is possible to machine components are caused to corrode, it is this in the presence of especially having water
Corrosiveness may become apparent from.
Summary of the invention
To solve the problem in the prior art, the present invention provides a kind of processing methods for reducing acid value of lubricating oil.
It can effectively reduce acid value of lubricating oil, oil product loss is small.
An object of the present invention is to provide a kind of processing method for reducing acid value of lubricating oil.
Include:
The inorganic agent used is the polymer containing vinyl monomer structural unit and acrylate structural unit；
The vinyl monomer structural unit has structure shown in formula (1):
Wherein, n is 1 or 2, and R1 and R2 are each independently the alkenyl group of H or C1-C20.
Wherein, preferably:
R1 and R2 are each independently H, CH3, C2H5 or C4H9.
On the basis of the total weight of the polymer, the content of the vinyl structural unit (1) is 0.1-99.9wt%,
The content of the acrylate structural unit is 0.1-99.9wt%；It is highly preferred that on the basis of the total weight of the polymer,
The content of the vinyl structural unit (1) is 10-30wt%, and the content of the acrylate structural unit is 70-90wt%.
The molecular weight of the polymer is between 500-100 000, molecular weight distribution 1.0-8.0, preferably 100-
35000, molecular weight distribution 1.5-5.0.
Method includes:
Inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample；It is stood after purification；
The weight percent of the lubricating oil sample and inorganic agent is (85-99%): (0.1-15%)；Preferably (90-
95%): (4-10%).
The refining reaction time is preferably 0.1-1 hours；Refining reaction temperature is preferably 90-130 DEG C.
Time of repose is 0.5-1.5 hours.
Refining times refer to after solvent and lubricating oil sample mixing, by conditions such as vibrations, to lubricating oil sample
Carry out subtractive process, required time.
Time of repose is to need the time of static placement, that is, phase disengaging time after lubricating oil sample.
The lubricating oil sample is preferably naphthene base crude oil；
The solvent is preferably furfural or NMP.
Following technical scheme specifically can be used in the present invention:
It include: that can effectively reduce acid value of lubricating oil the present invention provides a kind of acidizer.
Inorganic agent provided by the invention is the polymer containing vinyl monomer structural unit and acrylate structural unit；
The vinyl monomer structural unit has structure shown in formula (1):
Wherein, n is 1 or 2, and R1 and R2 are each independently the alkenyl group of H or C1-C20.
R1 and R2 is each independently the alkenyl group of H or C1-C20, preferably H, CH3, C2H5, C4H9
The acrylate be the acrylate with alkyl side chain, alkyl side chain be C1-C20 straight chained alkyl or
The alkyl side chain of branching, preferably CH3, C2H5, C4H9, C12H25.
The copolymer can be random copolymer, can be block copolymer, or alternate copolymer may be used also
Think graft copolymerization.
A preferred embodiment of the invention, it is described in order to improve the deacidification performance of polymer of the present invention
Polymer can also contain acrylamide structures alone.
The monomer of the acrylamide structure can be monomer commonly used in the art, be preferably selected from 2- acrylamido -2-
Methyl propane sulfonic acid, n-vinyl pyrrolidone, dimethylamino ethyl acrylate, acrylic acid diethylaminoethyl, methacrylic acid
One of dimethylamino ethyl ester, diethylaminoethyl base ethyl ester and N, N- dimethylacrylamide are a variety of.
Polymer according to the present invention, the vinyl monomer structural unit (1) and acrylate structural unit
Content can be selected in wider range, it is preferable that on the basis of the total weight of the polymer, the ethylene class formation
The content of unit (1) is 0.1-99.9wt%, and the content of the acrylate structural unit is 0.1-99.9wt%；More preferably
Ground, on the basis of the total weight of the polymer, the content of the vinyl structural unit (1) is 10-30wt%, the propylene
The content of acrylate structure unit is 70-90wt%.Using the preferred content, it is more advantageous to and gives full play to vinyl monomer structure
The effect of unit, and then obtain the deacidification better polymer of performance.
Polymer according to the present invention, wherein the molecular weight of the polymer is between 500-100 000, molecular weight point
Cloth is 1.0-8.0, preferably 100-35000, molecular weight distribution 1.5-5.0.
The method that the prior art can be used in the preparation of inorganic agent of the present invention, method include: in the presence of initiator, will be single
Body mixture carries out polymerization reaction, wherein it is institute as above that the monomer mixture, which contains acrylamide and monomer A, the monomer A,
State the vinyl monomer with formula (1) structure.
The preparation method of polymer according to the present invention, wherein the weight of the monomer mixture and the initiator
Amount ratio is not particularly limited, preferably 1:(1 × 10-6-3×10-2), further preferably 1:(1 × 10-5-5×10-3)。
The preparation method of inorganic agent according to the present invention, wherein the type of the initiator is not particularly limited,
But in order to improve the comprehensive performance of polymer, under preferable case, the initiator azo-initiator or peroxide draw
Send out agent, preferably azodiisobutyronitrile, benzoyl peroxide.
Following technical scheme specifically can be used in the present invention:
Inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample, obtains acid value less than 0.03mgKOH/g's
Lubricating oil；
The inorganic agent is a kind of polymer, wherein the polymer contains vinyl monomer structural unit and acryloyl
Amine structure unit, the vinyl monomer structural unit have structure shown in formula (1):
Wherein, n is 1 or 2 to formula (1), and R1 and R2 are each independently the alkenyl group of H or C1-C20.
The weight percent of the lubricating oil sample and inorganic agent is (85-99%): (0.1-15%).
Preferably, the lubricating oil sample is naphthene base crude oil.
Preferably, inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample, the reaction time is 0.1-
1 hour.
Preferably, inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample, the reaction temperature is 90-
130℃。
Preferably, inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample, the time of standing is 0.5-
1.5 hour.
Preferably, the weight percent of the lubricating oil sample and inorganic agent is (90-95%): (5-10%).
Compared with prior art, inorganic agent of the present invention is a kind of polymer, wherein the polymer contains second
Vinyl monomer structural unit and acrylamide structural unit can react with the organic acid in lubricating oil sample, to disappear
Organic acid is consumed, achievees the purpose that reduce lubricating oil sample acid value.The inorganic agent that the present invention uses is non-corrosive, is easy to remove,
Environment and sample will not be polluted.Experiment shows that the acid value of the present invention treated lubricating oil sample is 0.01-
0.03mgKOH/g。
Specific embodiment
Hereinafter, present invention will be further described in detail through examples, it is noted, that the embodiment of the present invention is served only for
The technical solution illustrated the present invention, the scope of the present invention are not limited in the following example.
The synthesis of inorganic agent
Embodiment A1
It at room temperature, is 1 and R by 4.10 grams of butyl acrylates, 3.04 grams of n1、R2It is CH3Formula (1) structure vinyl
Monomer is dissolved in 20ml ethyl acetate, is passed through nitrogen into reaction vessel, and deoxygenation 20 minutes.Azodiisobutyronitrile 0.05 is added
Gram, it being transferred in polymerization bottle, letting nitrogen in and deoxidizing depressurizes pump drainage deoxidation, then logical nitrogen 20 minutes after twenty minutes, and 70 DEG C are reacted 8 hours,
It is precipitated in n-hexane, obtains gum polymers 1, after measured, molecular weight 7800, molecular weight distribution 1.78.Structural unit 1
Content be 42.5%
Embodiment A2
It at room temperature, is 1 and R by 10 grams of methyl acrylates, 9.12 grams of n1、R2It is CH3Formula (1) structure vinyl list
Body is dissolved in 20ml ethyl acetate, is passed through nitrogen into reaction vessel, and deoxygenation 20 minutes.Azodiisobutyronitrile 0.05 is added
Gram, it being transferred in polymerization bottle, letting nitrogen in and deoxidizing depressurizes pump drainage deoxidation, then logical nitrogen 20 minutes after twenty minutes, and 70 DEG C are reacted 8 hours,
It is precipitated in n-hexane, obtains gum polymers 1, after measured, molecular weight 25000, molecular weight distribution 2.23.Structural unit
1 content is 47.6%
Embodiment A3
It at room temperature, is 1 and R by 5.0 grams of lauryl acid esters, 9.12 grams of n1、R2It is CH3Formula (1) structure ethylene
Class monomer is dissolved in 20ml ethyl acetate, is passed through nitrogen into reaction vessel, and deoxygenation 20 minutes.Azodiisobutyronitrile is added
It 0.05 gram, is transferred in polymerization bottle, letting nitrogen in and deoxidizing depressurizes pump drainage deoxidation, then logical nitrogen 20 minutes after twenty minutes, and 70 DEG C of reactions 8 are small
When, it is precipitated in n-hexane, obtains gum polymers 1, after measured, molecular weight 68000, molecular weight distribution 5.8.Structure list
The content of member 1 is 64.1%
Embodiment A4
It at room temperature, is 1 and R by 5.0 grams of methyl acrylates, 9.12 grams of n1、R2It is the vinyl of formula (1) structure of C4H9
Monomer is dissolved in 20ml ethyl acetate, is passed through nitrogen into reaction vessel, and deoxygenation 20 minutes.Azodiisobutyronitrile 0.05 is added
Gram, it being transferred in polymerization bottle, letting nitrogen in and deoxidizing depressurizes pump drainage deoxidation, then logical nitrogen 20 minutes after twenty minutes, and 70 DEG C are reacted 8 hours,
It is precipitated in n-hexane, obtains gum polymers 1, after measured, molecular weight 15400, molecular weight distribution 2.0.Structural unit 1
Content be 64.1%
[embodiment B1]
It is polymer described in the lubricating oil sample of 0.28mgKOH/g and 0.5 kilogram of embodiment A1 by 9 kilograms of acid values
The furfural solvent of inorganic agent mixes, and stirs at a temperature of 100 DEG C, and the refining reaction time is 0.1 hour.Then in 100 DEG C of constant temperature
Stand 1 hour.It is cooled at 60 DEG C, filters, obtain lubricating oil finished product.Obtained lubricating oil finished product is sampled, measurement acid
Value is 0.01mgKOH/g.
[embodiment B2]
The lubricating oil sample for being 0.58mgKOH/g by 20 kilograms of acid values, and polymerization described in 1 kilogram of embodiment A1 is added
The furfural solvent of object inorganic agent mixes, and stirs at a temperature of 120 DEG C, and the refining reaction time is 0.5 hour.Then in 120 DEG C of perseverances
Temperature stands 1 hour split-phase.It is cooled at 60 DEG C, filters, obtain lubricating oil finished product.Obtained lubricating oil finished product is sampled,
Measurement acid value is 0.02mgKOH/g.
[embodiment B3]
The lubricating oil sample for being 0.63mgKOH/g by 3 kilograms of acid values, and be added described in 0.15 kilogram of embodiment A2 and gather
The furfural solvent mixing for closing object inorganic agent, is stirred at a temperature of 120 DEG C, and the refining reaction time is 0.15 hour.Then at 120 DEG C
Constant temperature stands 1 hour split-phase.It is cooled at 60 DEG C, filters, obtain lubricating oil finished product.Obtained lubricating oil finished product is taken
Sample, measurement acid value are 0.01mgKOH/g.
[embodiment B4]
The lubricating oil sample for being 0.84mgKOH/g by 2 kilograms of acid values, and be added described in 0.04 kilogram of embodiment A3 and gather
The furfural solvent mixing for closing object inorganic agent, is stirred at a temperature of 100 DEG C, and the refining reaction time is 0.1 hour.Then at 100 DEG C
Constant temperature stands 1 hour split-phase.It is cooled at 60 DEG C, extracts upper oil phase out, obtain lubricating oil finished product.To obtained lubricating oil finished product
It is sampled, measurement acid value is 0.01mgKOH/g.
[embodiment B5]
The lubricating oil sample for being 4.15mgKOH/g by 10 kilograms of acid values, and be added described in 0.31 kilogram of embodiment A4
The furfural solvent of polymer treatment agent mixes, and stirs at a temperature of 100 DEG C, and the refining reaction time is 0.2 hour.Then 100
DEG C constant temperature stands 1 hour split-phase.It is cooled at 60 DEG C, extracts upper oil phase out, obtain lubricating oil finished product.To obtained lubricating oil at
Product are sampled, and measurement acid value is 0.01mgKOH/g.
[embodiment B6]
The lubricating oil sample for being 3.25mgKOH/g by 7 kilograms of acid values, and be added described in 0.28 kilogram of embodiment A1 and gather
The furfural solvent mixing for closing object inorganic agent, is stirred at a temperature of 100 DEG C, and the refining reaction time is 0.15 hour.Then at 100 DEG C
Constant temperature stands 1 hour split-phase.It is cooled at 60 DEG C, extracts upper oil phase out, obtain lubricating oil finished product.To obtained lubricating oil finished product
It is sampled, measurement acid value is 0.01mgKOH/g.
[embodiment B7]
The lubricating oil sample for being 1.25mgKOH/g by 6 kilograms of acid values, and be added described in 0.25 kilogram of embodiment A1 and gather
The nmp solvent mixing for closing object inorganic agent, is stirred at a temperature of 120 DEG C, then stands 1.5 hours split-phases in 120 DEG C of constant temperature.Cooling
To at 60 DEG C, extracts upper oil phase out, obtain lubricating oil finished product.Obtained lubricating oil finished product is sampled, measurement acid value is
0.02mgKOH/g。
[embodiment B8]
The lubricating oil sample for being 4.49mgKOH/g by 15 kilograms of acid values, and be added described in 0.72 kilogram of embodiment A2
The nmp solvent of polymer treatment agent mixes, and stirs at a temperature of 120 DEG C, then stands 1.5 hours split-phases in 120 DEG C of constant temperature.Drop
Temperature extracts upper oil phase out, obtains lubricating oil finished product at 60 DEG C.Obtained lubricating oil finished product is sampled, measurement acid value is
0.02mgKOH/g。
The explanation of the above case study on implementation is used to aid understanding the method and core concept of the present invention.It should be pointed out that for this
For the those of ordinary skill of technical field, under the premise of not departing from institute of the present invention, the present invention can also be carried out several
Improvement and modification, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art.It is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, but to accord with the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of processing method for reducing acid value of lubricating oil, it is characterised in that the described method includes:
The inorganic agent used is the polymer containing vinyl monomer structural unit and acrylate structural unit；
The vinyl monomer structural unit has structure shown in formula (1):
Wherein, n is 1 or 2, and R1 and R2 are each independently the alkenyl group of H or C1-C20.
2. reducing the processing method of acid value of lubricating oil as described in claim 1, it is characterised in that:
R1 and R2 are each independently H, CH3, C2H5 or C4H9.
3. reducing the processing method of acid value of lubricating oil as described in claim 1, it is characterised in that:
On the basis of the total weight of the polymer, the content of the vinyl structural unit (1) is 0.1-99.9wt%, described third
The content of olefin(e) acid ester structure unit is 0.1-99.9wt%；
The molecular weight of the polymer is between 500-100 000, molecular weight distribution 1.0-8.0.
4. reducing the processing method of acid value of lubricating oil as claimed in claim 3, it is characterised in that:
On the basis of the total weight of the polymer, the content of the vinyl structural unit (1) is 10-30wt%, described third
The content of olefin(e) acid ester structure unit is 70-90wt%；
The molecular weight of the polymer is between 100-35000, molecular weight distribution 1.5-5.0.
5. reducing the processing method of acid value of lubricating oil as described in claim 1, it is characterised in that:
Inorganic agent is dissolved in solvent, solvent refining is carried out to lubricating oil sample；It is stood after purification；
The weight percent of the lubricating oil sample and inorganic agent is (85-99%): (0.1-15%).
6. reducing the processing method of acid value of lubricating oil as described in claim 1, it is characterised in that
The weight percent of the lubricating oil sample and inorganic agent is (90-95%): (4-10%).
7. reducing the processing method of acid value of lubricating oil as claimed in claim 5, it is characterised in that:
The refining reaction time is 0.1-1 hours.
8. reducing the processing method of acid value of lubricating oil as claimed in claim 5, it is characterised in that:
Refining reaction temperature is 90-130 DEG C.
9. reducing the processing method of acid value of lubricating oil as claimed in claim 5, it is characterised in that:
Time of repose is 0.5-1.5 hours.
10. reducing the processing method of acid value of lubricating oil as claimed in claim 5, it is characterised in that:
The lubricating oil sample is naphthene base crude oil；
The solvent is furfural or NMP.
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| JPH03137295A (en) * | 1989-10-24 | 1991-06-11 | Sannopuko Kk | Lubricant for pigment-coated paper |
| JPH05117681A (en) * | 1991-10-30 | 1993-05-14 | Mitsubishi Heavy Ind Ltd | Refrigerator oil |
| CN102977976A (en) * | 2006-04-24 | 2013-03-20 | 卢布里佐尔公司 | Star polymer lubricating composition |
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