CN102757842A - Ashless low-temperature hydraulic oil - Google Patents
Ashless low-temperature hydraulic oil Download PDFInfo
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Abstract
The invention discloses ashless low-temperature hydraulic oil composed of tempered base oil and composite additives. The tempered base oil comprises 10-80wt% of low-viscosity hydrogenation base oil, 10-80wt% of mineral base oil, 0-40wt% of IV and/or V type base oil, 0.1-10wt% of viscosity index improver and 0-5wt% of pour point depressant. The mineral base oil is selected from II type base oil, III type base oil, bright oil or any optional two of the three types of oil. The viscosity of the low-viscosity hydrogenation base oil at 100 DEG C is 1.5-3.0mm<2>/s, alkane content of the low-viscosity hydrogenation base oil is smaller than 40wt%, total cycloalkane content is larger than 60wt%, aromatic hydrocarbon content is smaller than 0.2wt%, and sulfur content is smaller than 0.05wt%. The composite additives include 0.1-40wt% of extreme-pressure antiwear agent, 0.1-50wt% of antioxidant, 0.1-10wt% of antiseptics, 0.1-40wt% of antifriction agent and 1.0-60wt% of diluents oil. The mass ratio of the composite additives to the tempered base oil is 0.1-10.0%. Each performance of the ashless low-temperature hydraulic oil completely meets the technical requirements on HV series hydraulic oil in the GB/T11118.1-94 and ISO11158-2009 standards.
Description
Technical field
The present invention is a kind of antiwear hydraulic oil, specifically, is a kind of by the synthetic low temperature ashless anti-wear hydraulic oil of composite foundation oil.
Background technology
It is low that hydrogenated base oil has sulphur, nitrogen, aromaticity content, and the advantage that low-temperature performance is good significantly improves the susceptibility of oxidation inhibitor, and toxicity reduces, and thermostability and oxidation stability are good.Along with lubricating oil develops to high-quality direction, lubricant base is just changed to II/III class oil by the I class oil of API criteria for classification regulation.
In hydrogenated base oil, 100 ℃ of kinematic viscosity are at 1.5～3.0mm
2The viscosity index of the LV base oil the between/s is little, and viscosity is little, and flash-point is low, and volatility is big, and it is used and therefore receives very big restriction.Usually be used as thinning oil or quilt blending or be cracked into lighter product, like diesel oil and petroleum naphtha etc.; Even if as lubricating oil, also only be to use transformer oil, metal working fluid etc. in the less demanding oil product of flash-point, volatile performance, greatly reduce its marketable value.Yet in the hydrogenated oil production process, this ultra-low viscosity hydrogenated oil accounts for more than 40% of all prods, if its utility value is not high, with causing very big financial loss.
CN1726272A discloses a kind of method with LV fischer-tropsch synthetic base oil and traditional base oil blending production high quality lubricating base oil, uses 100 ℃ of kinematic viscosity to be about 2mm
2/ s or bigger but less than 3mm
2The fischer-tropsch of/s synthesizes the distillate cut, with the oil base oil of the mixture of I class base oil, II class base oil, III class base oil and above-mentioned two or more traditional base oil in the ratio blending that is fit to be about 3mm so that produce 100 ℃ of viscosity
2/ s or bigger lubricating base oil tempered oil.Said LV fischer-tropsch synthetic base oil has high viscosity index and lower volatility.
CN1829788A discloses a kind of accord method with LV fischer-tropsch base oil and Fisher-Tropsch derived tower bottom distillate bright stock, is 2mm through concocting 100 ℃ of viscosity
2/ s or bigger but less than 3mm
2Fischer-tropsch overhead product cut and the Fisher-Tropsch derived tower bottom distillate of/s prepare Fisher-Tropsch derived lubricating base oil; The lubrication base oil compsns has 100 ℃ of about 3～10mm
2The viscosity of/s and the TGA Noack volatility that is lower than about 45wt%; Use the refining lubricant of this lubricating base oil preparation, be fit to do the base chamber lubricant.
It is about 2mm with 100 ℃ of kinematic viscosity that US6703353B1 discloses a kind of
2/ s or bigger but less than 3mm
2The synthetic distillate of the LV fischer-tropsch of/s and other a kind of 100 ℃ of viscosity are greater than 3.8mm
2The Fisher-Tropsch synthesis fuels of/s is formed base oil, again the blending of this base oil and traditional I class base oil, II class base oil can be produced high-quality lubricating base oil, and 100 ℃ of viscosity of lubricating base oil tempered oil are about 3～10mm
2/ s, Noack weight vaporization losses is lower than about 35%.
It is about 1.5～3.6mm with 100 ℃ of viscosity that WO2008/079740 discloses a kind of
2/ s, Noack evaporation mass loss 0～100% and produce the method that high-quality, Noack weight vaporization losses is lower than about 29% lubricating base oil less than the light base oil of LV of Noack volatility coefficient and traditional I class base oil, the blending of II class base oil, 100 ℃ of viscosity of this method production are about 3～10mm
2/ s lubricating base oil tempered oil.The light base oil of said LV is the synthetic distillate of fischer-tropsch, and viscosity index is greater than 120.
Summary of the invention
The purpose of this invention is to provide a kind of ashless low temperature hydraulic oil, the used base oil of this hydraulicefficiency oil is made by the blending of LV hydrogenated base oil, through adding the request for utilization that the ashless low temperature hydraulic oil that makes after the suitable additives satisfies standard code.
Ashless low temperature hydraulic oil provided by the invention; Comprise blending base oil and composite additive; Described blending base oil comprises IV and/or the V class base oil of mineral base oil, 0～40 quality % of LV hydrogenated base oil, 10～80 quality % of 10～80 quality %, the viscosity index improver of 0.1～10 quality %, the pour point depressant of 0～5 quality %, and 100 ℃ of viscosity of described LV hydrogenated base oil are 1.5～3.0mm
2/ s; During it is formed paraffinicity less than 40 quality %, total naphthene content greater than 60 quality %, aromaticity content less than 0.2 quality %; Sulphur content is less than 0.05 quality %; Described mineral base oil is selected from any two kinds in II class base oil, III class base oil, bright stock or the said three types of oil; Described composite additive comprises the extreme pressure anti-wear additives of 0.1～40 quality %, the oxidation inhibitor of 0.1～50 quality %, the sanitas of 0.1～10 quality %, the low friction compound of 0.1～40 quality % and the thinning oil of 1.0～60 quality %, and the mass ratio of said composite additive and blending base oil is 0.1～10.0%.
The present invention is applicable to LV hydrogenated base oil, full-bodied mineral base oil and an amount of composite preparation of viscosity index improver the blending base oil of low temperature hydraulic oil; Effectively utilized the LV hydrogenated base oil of low value; In blending base oil of the present invention, add suitable additive and can obtain high performance ashless low temperature antiwear hydraulic oil, its each item performance satisfies the technical requirements of HV series low temperature hydraulic oil among GB/T11118.1-94 and the ISO11158-2009 fully.
Embodiment
The present invention obtains being applicable to the blending base oil of low temperature hydraulic oil with LV hydrogenated base oil and full-bodied mineral base oil and viscosity index improver blending, to wherein adding composite additive, obtains ashless low temperature hydraulic oil.This ashless low temperature hydraulic oil makes full use of the advantage of LV hydrogenated base oil; Overcome the deficiency that its viscosity is little, flash-point is low, vaporization losses is big, viscosity index is not high; Each item performance satisfies the technical requirements of HV series viscosity grade 15,22,32,46,68 hydraulicefficiency oil in GB/T11118.1-94 and the ISO11158-2009 standard fully; Reduced the cost of base oil, thereby also reduced the cost of low temperature hydraulic oil, solved the LV hydrogenated base oil and be difficult to obtain the problem that high value is utilized.
Ashless low temperature hydraulic oil provided by the invention comprises blending base oil and composite additive, and described blending base oil comprises LV hydrogenated base oil, full-bodied mineral base oil and viscosity index improver.For improving the low-temperature performance of blending base oil, preferably in blending base oil, add IV and/or V class base oil, in blending base oil, behind adding IV class and/or the V class base oil, then can also can add a small amount of pour point depressant not with pour point depressant.This kind blending base oil preferably includes IV and/or the V class base oil of mineral base oil, 5～25 quality % of LV hydrogenated base oil, 15～50 quality % of 20～60 quality %, the viscosity index improver of 1～8 quality %, the pour point depressant of 0～1.0 quality %.
For improving the low-temperature performance of blending base oil, also can in blending base oil, add pour point depressant, if in blending base oil, add pour point depressant, then can not add IV class and/or V class base oil.This kind blending base oil preferably includes IV and/or the V class base oil of mineral base oil, 0～25 quality % of LV hydrogenated base oil, 15～50 quality % of 20～60 quality %, the viscosity index improver of 1～8 quality %, the pour point depressant of 0.1～3.0 quality %.
Above-mentioned blending base oil medium viscosity index improving agent content can be 1.0～6.0 quality %, and pour point depressant content can be 0.1～1.0 quality %.
The used composite additive of low temperature hydraulic oil of the present invention preferably includes the extreme pressure anti-wear additives of 1.0～20 quality %, the oxidation inhibitor of 1.0～25 quality %, the sanitas of 0.5～5 quality %, the low friction compound of 1.0～30 quality % and the thinning oil of 30～55 quality %.
The mass ratio of said composite additive and blending base oil is 0.1～10.0%, preferred 0.8～3.0%.
100 ℃ of viscosity of described LV hydrogenated base oil are 1.5～3.0mm
2/ s, viscosity index is 75～90, and pour point is not higher than-42 ℃, preferred-55～-42 ℃, and open flash point is not less than 150 ℃, preferred 150～180 ℃, Noack evaporation mass loss (250 ℃ 1h) are not less than 75%, preferred 75～90%.The aromaticity content of described LV hydrogenated base oil is very little, hardly sulfur-bearing.
Described mineral base oil is selected from II class base oil, III class base oil or the bright stock by the technical requirements classification of API-1509 regulation, any two kinds compsn in perhaps above-mentioned three types of oil.Described bright stock is made by residual oil, has higher viscosity.
Above-mentioned II class base oil be meant saturated hydrocarbon content greater than 90 quality %, viscosity index be 80～120, sulphur content is less than the base oil of 0.3 quality %; Preferred No. 4, No. 6, No. 8, No. 10 hydrogenated base oils, 100N, 150N, 250N, 350N, 400N, 500N, 650N hydrogenated base oil.
III class base oil be meant saturated hydrocarbon content greater than 90 quality %, viscosity index greater than 120, sulphur content is less than the base oil of 0.3 quality %, preferred Yu-4, Yu-6, Yu-8 hydrogenated base oil.
IV class base oil is meant poly-alpha olefins (PAO) synthetic base oil, and its kind has PAO4, PAO6, PAO8, PAO10, PAO12.
V class base oil is meant the lubricant base except that I class, II class, III class, IV class base oil; Like synthesizing ester base oil, alkylnaphthalene class base oil, silicone oil etc., described synthesizing ester base oil can be one or more in trihydroxymethylpropanyl ester, adjacent benzenetricarboxylic acid ester, neopentyl polyol ester or the pentaerythritol ester.
The kind of said bright stock has 120BS, 150BS, hydrogenation 120BS or hydrogenation 150BS.
100 ℃ of viscosity that the present invention prepares the used II class of blending base oil～V class base oil are preferably greater than 3.6mm
2/ s, more preferably 3.8～15.0mm
2/ s.
Extreme pressure anti-wear additives in the described composite additive is selected from sulfur-bearing extreme pressure anti-wear additives, phosphorous extreme pressure anti-wear additives, sulfur-bearing phosphorus extreme pressure anti-wear additives or sulfur-bearing phosphorus nitrogen extreme pressure anti-wear additives, one or more in preferred triphenyl-thiophosphate, thiophosphatephosphorothioate, thiophosphoric acid amine salt, olefine sulfide, the sulfo-amino ester.
Described oxidation inhibitor is selected from amine type oxidation inhibitor, phenol type antioxidant, ester type oxidation inhibitor, one or more in preferred DBPC 2,6 ditertiary butyl p cresol, hindered phenol, alkyl diphenylamine, the alkyl phenyl propionic ester.
Described sanitas is selected from one or more in carboxylic acid derivative, carboxylates derivatives, 124 Triazole verivate, the thiadiazoles derivative.
Described low friction compound is selected from one or more in SULPHOSUCCINIC ACID ESTER, phosphonic acid ester, the 124 Triazole verivate.
The used pour point depressant of the present invention is selected from one or more in polyolefine pour point depressant, Rohm tech inc pour point depressant or the alkylnaphthalene.The preferred T803 of poly-alpha-olefin pour depressant, the preferred T814 of Rohm tech inc pour point depressant, Empicryl PPT 148, the preferred T801 of alkylnaphthalene pour point depressant.
Described viscosity index improver is selected from ethylene-propylene copolymer, polyisobutene or Rohm tech inc.The preferred T613 of ethylene-propylene copolymer viscosity index improver, T614, T618, L7, P8230; The preferred L3 of polyisobutene viscosity index improver, the preferred T602 of Rohm tech inc viscosity index improver, T632, T633, T634, Viscoplex series product.
It is 4.0～10.0mm that described thinning oil is selected from 100 ℃ of viscosity
2The base oil of/s, the preferred described I class of API-1509, II class or III class base oil.Said I class base oil is meant saturated hydrocarbon content less than 90 quality %, and viscosity index is 80～120, and sulphur content is greater than the base oil of 0.3 quality %.The preferred 100SN of I class base oil, 150SN, 250SN as thinning oil of the present invention.
The modulator approach of the present invention is ashless low temperature antiwear hydraulic oil is: in blending base oil, add the composite additive for preparing, dispersed with stirring is even, promptly obtains the low temperature antiwear hydraulic oil.
The preparation method of mediation base oil according to the invention is: the blending kettle that by the allotment ratio lubricant base is added the band whipping appts earlier; Add the LV hydrogenated base oil by the allotment ratio then; 15～45 ℃ were stirred 30～60 minutes; Add pour point depressant and/or viscosity index improver again, 50～70 ℃ were stirred 30～60 minutes, filtered and obtained the blending base oil compsn.
Described composite additive contains antiwear hydraulic oil required various additives and thinning oil; Its preparation method promptly is various additives to be added in required ratio process uniform liquid in the thinning oil, to add the low temperature antiwear hydraulic oil of processing each viscosity grade in the blending base oil.
Pass through instance further explain the present invention below, but the present invention is not limited to this.
Instance 1
The used composite additive of preparation the present invention.
Extreme pressure anti-wear additives, oxidation inhibitor, sanitas, low friction compound and thinning oil are modulated into two kinds of composite additive B by additive types shown in the table 1 and additional proportion
1And B
2, additive trade names for using in the bracket.
Table 1
Instance 2
Following examples preparation low temperature ashless anti-wear hydraulic oil of the present invention.
(1) preparation blending base oil
With LV hydrogenated base oil, IV class base oil PAO10, V class base oil trihydroxymethylpropanyl ester, II class base oil 250N, Rohm tech inc (Viscoplex 8-310) by 45: 20: 10: 20: 5 mass ratio is got ready.Earlier 250N, PAO10 and trihydroxymethylpropanyl ester are added in the blending kettle of band whipping appts; Add the LV hydrogenated base oil again; 40 ℃ were stirred 30 minutes, added Rohm tech inc then, were warming up to 60 ℃ and stirred 30 minutes; Filtration obtains blending base oil, and the quality percentage composition of its each component is seen table 2.
100 ℃ of viscosity of used LV hydrogenated base oil are 2.324mm
2/ s, 40 ℃ of viscosity are 8.52mm
2/ s, viscosity index 79, pour point-48 ℃, 159 ℃ of open flash points, Noack evaporation mass loss (250 ℃, 1h) 82.6%, paraffinicity 36.99 quality %, total naphthene content 62.98 quality %, aromaticity content 0.03 quality % in the composition.
100 ℃ of viscosity of PAO10 are 10.78mm
2/ s, 40 ℃ of viscosity are 71.91mm
2268 ℃ of/s, viscosity index 138, pour point-51 ℃, open flash point.
100 ℃ of viscosity of trihydroxymethylpropanyl ester are 5.316mm
2/ s, 40 ℃ of viscosity are 25.87mm
2225 ℃ of/s, viscosity index 144, pour point-54 ℃, open flash point.
100 ℃ of viscosity of 250N are 6.738mm
2/ s, 40 ℃ of viscosity are 44.16mm
2/ s, viscosity index 106, pour point-18 ℃, 232 ℃ of open flash points.
(2) preparation low temperature ashless anti-wear hydraulic oil
In the blending base oil that makes of (1) step, add the composite additive B that accounts for its total amount 1.5 quality %
2, dispersed with stirring is even, obtains meeting the ashless low temperature hydraulic oil of HV of 32 viscosity grades, and its performance is seen table 3.
Instance 3
(1) preparation blending base oil
With instance 2 described LV hydrogenated base oils, Yu-8 base oil, PAO10, poly-alpha-olefin pour depressant (T803), ethylene-propylene copolymer viscosity index improver (T618) by 45.0: 40.0: 10.2: 0.3: 4.5 mass ratio is got ready.Earlier Yu-8, PAO10 are added in the blending kettle of band whipping appts, add the LV hydrogenated base oil again, 40 ℃ were stirred 30 minutes; Add T803 and T618 then; Be warming up to 60 ℃ and stirred 30 minutes, filter and obtain blending base oil, the quality percentage composition of its each component is seen table 2.
100 ℃ of viscosity of used hydrogenated base oil Yu-8 are 7.861mm
2/ s, 40 ℃ of viscosity are 47.01mm
2256 ℃ of/s, viscosity index 128, pour point-12 ℃, open flash point.
(2) preparation low temperature ashless anti-wear hydraulic oil
In the blending base oil that makes of (1) step, add the composite additive B that accounts for its total amount 1.8 quality %
1, dispersed with stirring is even, obtains meeting the ashless low temperature hydraulic oil of HV of 32 viscosity grades, and its performance is seen table 3.
Instance 4
(1) preparation blending base oil
By LV hydrogenated base oil, 250N hydrogenated base oil, Yu-8 hydrogenated base oil, bright stock 150BS, Rohm tech inc pour point depressant (T814) and ethylene-propylene copolymer viscosity index improver (P8230) by 35.0: 20.0: 30.5: 10.0: 0.5: 4.0 mass ratio is got ready.Earlier 250N, Yu-8,150BS are added in the blending kettle of band whipping appts, add the LV hydrogenated base oil again, 40 ℃ were stirred 30 minutes; Add T814 and P8230 then; Be warming up to 60 ℃ and stirred 30 minutes, filter and obtain blending base oil, the quality percentage composition of its each component is seen table 2.
100 ℃ of viscosity of used LV hydrogenated base oil are 2.535mm
2/ s, 40 ℃ of viscosity are 9.73mm
2/ s, viscosity index 81, pour point-45 ℃, 165 ℃ of open flash points, (250 ℃ of Noack evaporation mass losses; 1h) 79.5%; Paraffinicity 37.60 quality %, total naphthene content 62.35 quality %, aromaticity content 0.03 quality % in the composition, sulfur mass fraction 0.02 quality %.
100 ℃ of viscosity of 150BS bright stock are 34.2mm
2293 ℃ of/s, pour point-9 ℃, open flash point.
(2) preparation low temperature ashless anti-wear hydraulic oil
In the blending base oil that makes of (1) step, add the composite additive B that accounts for its total amount 1.8 quality %
1, dispersed with stirring is even, obtains meeting the ashless low temperature hydraulic oil of HV of 46 viscosity grades, and its performance is seen table 3.
Instance 5
(1) preparation blending base oil
With instance 4 described LV hydrogenated base oils, Yu-8 hydrogenated base oil, bright stock 150BS, poly-alpha-olefin pour depressant (T803), the second third copolymerization viscosity index improver (L7) by 40: 44.4: 10.0: 0.6: 5.0 mass ratio is got ready.Earlier Yu-8,150BS are added in the blending kettle of band whipping appts, add the LV hydrogenated base oil again, 40 ℃ were stirred 30 minutes; Add T803 and L7 then; Be warming up to 60 ℃ and stirred 30 minutes, filter and obtain blending base oil, the quality percentage composition of its each component is seen table 2.
(2) preparation low temperature ashless anti-wear hydraulic oil
In the blending base oil that makes of (1) step, add the composite additive B that accounts for its total amount 1.5 quality %
2, dispersed with stirring is even, obtains meeting the ashless low temperature hydraulic oil of HV of 46 viscosity grades, and its performance is seen table 3.
Table 2
Table 3
Claims (14)
1. ashless low temperature hydraulic oil; Comprise blending base oil and composite additive; Described blending base oil comprises IV and/or the V class base oil of mineral base oil, 0～40 quality % of LV hydrogenated base oil, 10～80 quality % of 10～80 quality %, the viscosity index improver of 0.1～10 quality %, the pour point depressant of 0～5 quality %, and 100 ℃ of viscosity of described LV hydrogenated base oil are 1.5～3.0mm
2/ s; During it is formed paraffinicity less than 40 quality %, total naphthene content greater than 60 quality %, aromaticity content less than 0.2 quality %; Sulphur content is less than 0.05 quality %; Described mineral base oil is selected from any two kinds in II class base oil, III class base oil, bright stock or the said three types of oil; Described composite additive comprises the extreme pressure anti-wear additives of 0.1～40 quality %, the oxidation inhibitor of 0.1～50 quality %, the sanitas of 0.1～10 quality %, the low friction compound of 0.1～40 quality % and the thinning oil of 1.0～60 quality %, and the mass ratio of said composite additive and blending base oil is 0.1～10.0%.
2. according to the described low temperature hydraulic oil of claim 1, it is characterized in that described blending base oil comprises IV and/or the V class base oil of mineral base oil, 5～25 quality % of LV hydrogenated base oil, 15～50 quality % of 20～60 quality %, the viscosity index improver of 1～8 quality %, the pour point depressant of 0～1.0 quality %.
3. according to the described low temperature hydraulic oil of claim 1, it is characterized in that described blending base oil comprises IV and/or the V class base oil of mineral base oil, 0～25 quality % of LV hydrogenated base oil, 15～50 quality % of 20～60 quality %, the viscosity index improver of 1～8 quality %, the pour point depressant of 0.1～3.0 quality %.
4. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described composite additive comprises the extreme pressure anti-wear additives of 1.0～20 quality %, the oxidation inhibitor of 1.0～25 quality %, the sanitas of 0.5～5 quality %, the low friction compound of 1.0～30 quality % and the thinning oil of 30～55 quality %.
5. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that the said composite additive and the mass ratio of mediation base oil are 0.8～3.0%.
6. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described pour point depressant is selected from polyolefine pour point depressant, Rohm tech inc pour point depressant or alkylnaphthalene.
7. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described viscosity index improver is selected from ethylene-propylene copolymer, polyisobutene or Rohm tech inc viscosity index improver.
8. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described extreme pressure anti-wear additives is selected from one or more in triphenyl-thiophosphate, thiophosphatephosphorothioate, thiophosphoric acid amine salt, olefine sulfide, the sulfo-amino ester.
9. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described oxidation inhibitor is selected from one or more in DBPC 2,6 ditertiary butyl p cresol, hindered phenol, alkyl diphenylamine, the alkyl phenyl propionic ester.
10. according to described any one low temperature hydraulic oil of claim 1～3, it is characterized in that described sanitas is selected from one or more in carboxylic acid derivative, carboxylates derivatives, 124 Triazole verivate, the thiadiazoles derivative.
11., it is characterized in that described low friction compound is selected from one or more in SULPHOSUCCINIC ACID ESTER, phosphonic acid ester, the 124 Triazole verivate according to described any one low temperature hydraulic oil of claim 1～3.
12., it is characterized in that it is 4.0～10.0mm that described thinning oil is selected from 100 ℃ of viscosity according to described any one low temperature hydraulic oil of claim 1～3
2The base oil of/s.
13., it is characterized in that described thinning oil is selected from I class, II class or III class base oil according to the described low temperature hydraulic oil of claim 12.
14. according to described any one low temperature hydraulic oil of claim 1～3,100 ℃ of viscosity that it is characterized in that the used II class of blending base oil～V class base oil are greater than 3.6mm
2/ s.
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| CN103343035A (en) * | 2013-07-25 | 2013-10-09 | 中国石油化工股份有限公司 | Hydraulic oil composition and method for preparing same |
| CN104232273A (en) * | 2014-10-08 | 2014-12-24 | 无锡阳工机械制造有限公司 | Low-temperature hydraulic oil |
| CN105695057A (en) * | 2016-02-26 | 2016-06-22 | 北京雅士科莱恩石油化工有限公司 | Energy-saving engineering machinery hydraulic oil with high viscosity index and ultralow temperature |
| CN107353977A (en) * | 2017-07-25 | 2017-11-17 | 合肥欧仕嘉机电设备有限公司 | A kind of engineering machinery antiwear hydraulic oil and preparation method thereof |
| CN109054954A (en) * | 2018-09-25 | 2018-12-21 | 江苏司能润滑科技有限公司 | A kind of antiwear hydraulic oil and preparation method thereof |
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| CN105695057B (en) * | 2016-02-26 | 2018-08-14 | 北京雅士科莱恩石油化工有限公司 | A kind of high viscosity index (HVI) ultralow temperature energy-saving engineering mechanical hydraulic oil |
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| CN112646649A (en) * | 2019-10-10 | 2021-04-13 | 中国石油化工股份有限公司 | Low-temperature-resistant long-life hydraulic transmission oil composition and preparation method and application thereof |
| CN114181758A (en) * | 2020-09-15 | 2022-03-15 | 中国石油化工股份有限公司 | Transformer oil and preparation method thereof |
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