[go: up one dir, main page]

US20180334633A1 - Method for improving the air release of a lubricating oil in a hydraulic system - Google Patents

Method for improving the air release of a lubricating oil in a hydraulic system Download PDF

Info

Publication number
US20180334633A1
US20180334633A1 US15/777,724 US201615777724A US2018334633A1 US 20180334633 A1 US20180334633 A1 US 20180334633A1 US 201615777724 A US201615777724 A US 201615777724A US 2018334633 A1 US2018334633 A1 US 2018334633A1
Authority
US
United States
Prior art keywords
lubricating oil
mass
oil
air release
base oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/777,724
Inventor
Anne Taylor Coleman
Sravani GULLAPALLI
Jennifer Lin Karam KENSLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell USA Inc
Original Assignee
Shell Oil Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Oil Co filed Critical Shell Oil Co
Priority to US15/777,724 priority Critical patent/US20180334633A1/en
Assigned to SHELL OIL COMPANY reassignment SHELL OIL COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COLEMAN, ANNE TAYLOR, KENSLER, Jennifer Lin Karam, GULLAPALLI, Sravani
Publication of US20180334633A1 publication Critical patent/US20180334633A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/17—Fisher Tropsch reaction products
    • C10M2205/173—Fisher Tropsch reaction products used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
    • C10N2220/022—
    • C10N2230/02—
    • C10N2240/08—

Definitions

  • the invention relates to a method for improving the air release of a lubricating oil in a hydraulic system.
  • Air entrainment is a phenomenon wherein air bubbles (typically having a diameter of less than 1 mm) are dispersed throughout the lubricating oil. Entrained air can be distinguished from free air (a pocket of air trapped in part of the system), from dissolved air (lubricating oils may contain between 6 and 12 percent by volume of dissolved air) and from foam (air bubbles typically greater than 1 mm in diameter that congregate on the surface of the oil). Air entrainment can have a number of negative consequences including loss of lubricity, possible oxidation of the lubricating oil, noisy operation, lower efficiency and higher oil temperatures.
  • the air entrainment properties of a lubricating oil are typically measured using the ASTM D3427 air release test. This test measures the time needed for air entrained in the oil to reduce in volume to 0.2% under the test conditions and at the specified temperature.
  • the present inventors have sought to improve the air entrainment properties of lubricating oils that are used in hydraulic systems.
  • the invention provides a method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system;
  • the inventors have found that improved air release is achieved when the base oil in the lubricating oil is predominantly GTL base oil.
  • the present invention provides a method for improving the air release of a lubricating oil in a hydraulic system.
  • the lubricating oil is used not only to lubricate the machinery but also to transmit pressure. Air entrainment can be a particular issue in hydraulic systems, causing spongy or erratic operation of the hydraulics.
  • the air release is measured according to ASTM D3427 (Version 14a, 2015). Compressed air is blown through the lubricating oil, which has been heated to a temperature of 50° C. After the air flow is stopped, the time required for the air entrained in the oil to reduce in volume to 0.2% is recorded as the air release time.
  • a desirable air release value is typically less than 3 minutes, preferably less than 60 seconds and most preferably less than 20 seconds.
  • the air release is improved compared to air release achieved using a lubricating oil which comprises less than 70% by mass of GTL base oil.
  • the comparison is between substantially equivalent lubricating oils wherein the only difference is in the amount of GTL base oil that is present.
  • the comparison should be between lubricating oils that are of the same viscosity and that contain the same additives.
  • the non-GTL base oil is, for example, a base oil from Group I, II or III of the API base oil categories.
  • the inventors By incorporating at least 70% by mass of GTL base oil the inventors have observed improved air release times as compared to lubricating oils having less than 70% by mass of GTL base oil (and wherein the GTL base oil has been replaced by a Group I, II or III base oil).
  • the lubricating oil is supplied to the hydraulic system using standard methods.
  • the lubricating oil comprises at least 90% by mass, based upon the mass of the lubricating oil, of base oil. At least 70% by mass, based upon the mass of the base oil, is GTL base oil. Preferably at least 75% by mass is GTL base oil.
  • GTL base oils are synthesised by the Fischer-Tropsch method of converting natural gas to liquid fuel. They have very low sulphur content and aromatic content compared with mineral oil base oils refined from crude oil and have a very high paraffin constituent ratio. Up to 30% by mass (and preferably up to 25% by mass), based upon the mass of the base oil, may be another type of base oil, including conventional base oils chosen from Groups I, II, and III of the API (American Petroleum Institute) base oil categories. In one embodiment of the invention, the base oil comprises at least 10% by mass of a base oil chosen from Group I, Group II or Group III.
  • the kinematic viscosity of the GTL base oil at 100° C. is from 2 to 20 cSt, preferably from 3 to 15 cSt and more preferably from 3 to 10 cSt.
  • the viscosity is suitably measured using ASTM D445.
  • the lubricating oil comprises less than 10% by mass, based upon the mass of the lubricating oil, of additives.
  • the amount of additives is less than 5% by mass. Preferably the amount of additives is at least 0.5% by mass.
  • the additives may include antioxidants, antiwear additives, demulsifiers, emulsifiers, rust and corrosion inhibitors, VI improvers and/or friction modifiers.
  • the additives may be supplied as additive packages, e.g. an ashless additive package or a zinc-based additive package.
  • the kinematic viscosity of the lubricating oil at 40° C. is from 20 to 100 cSt, preferably from 25 to 80 cSt.
  • the kinematic viscosity is suitably measured using ASTM D445 (ASTM D7042). This range of viscosities provides lubricating oils suitable for use in hydraulic systems.
  • Blend 1 100 0 0 5 Blend 2 75 25 0 5 Blend 3 66.7 33.3 0 30
  • Blend 4 50 50 0 40 Blend 5 25 75 0 60
  • Blend 6 0 100 0 77 Blend 7 0 0 100 61
  • Blend 8 50 0 50 46
  • Blend 9 90 0 10 5 Blend 10 80 0 20 5 Blend 11 75 0 25 15
  • Air release times are typically considered to get worse with the addition of additives.
  • blends were prepared using XHVI 8 (a Fischer-Tropsch derived oil available from Shell having a viscosity at 100° C. of approximately 8 cSt) and different amounts of either of the following:
  • Table 2 gives the blend compositions (in weight % based upon the total weight of the blend) for each of the additive packages with XHVI 8 and the corresponding air release times:
  • Blend 1 0 0 100 5 Blend 12 1 0 99 10 Blend 13 2.5 0 97.5 10 Blend 14 5 0 95 10 Blend 15 0 1 99 10 Blend 16 0 2 98 10 Blend 17 0 3 97 10 Blend 18 0 4 96 10 Blend 19 0 5 95 10 Blend 20 0 10 90 10

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention provides a method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system. The air release is measured according to ASTM D3427.

Description

    FIELD OF THE INVENTION
  • The invention relates to a method for improving the air release of a lubricating oil in a hydraulic system.
    • BACKGROUND OF THE INVENTION
  • Lubricating oils are required in hydraulic systems to protect, lubricate and help transmit power. Current trends in the design of hydraulic systems are towards smaller reservoirs, low oil residence times and high power output. These changes are leading to increased problems of air entrainment. Air entrainment is a phenomenon wherein air bubbles (typically having a diameter of less than 1 mm) are dispersed throughout the lubricating oil. Entrained air can be distinguished from free air (a pocket of air trapped in part of the system), from dissolved air (lubricating oils may contain between 6 and 12 percent by volume of dissolved air) and from foam (air bubbles typically greater than 1 mm in diameter that congregate on the surface of the oil). Air entrainment can have a number of negative consequences including loss of lubricity, possible oxidation of the lubricating oil, noisy operation, lower efficiency and higher oil temperatures.
  • The air entrainment properties of a lubricating oil are typically measured using the ASTM D3427 air release test. This test measures the time needed for air entrained in the oil to reduce in volume to 0.2% under the test conditions and at the specified temperature.
  • The present inventors have sought to improve the air entrainment properties of lubricating oils that are used in hydraulic systems.
    • SUMMARY OF THE INVENTION
  • Accordingly, the invention provides a method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system;
    • wherein the lubricating oil comprises at least 90% by mass, based upon the mass of the lubricating oil, of base oil, and wherein at least 70% by mass, based upon the mass of the base oil, is GTL base oil;
    • wherein the viscosity of the GTL base oil at 100° C. is from 2 to 20 cSt;
    • wherein the lubricating oil comprises less than 10% by mass, based upon the mass of the lubricating oil, of additives;
    • wherein the viscosity of the lubricating oil at 40° C. is from 20 to 100 cSt; and
    • wherein air release is measured according to ASTM D3427 and is improved as compared to air release achieved using a lubricating oil which comprises less than 70% by mass of GTL base oil.
  • The inventors have found that improved air release is achieved when the base oil in the lubricating oil is predominantly GTL base oil.
    • DETAILED DESCRIPTION OF THE INVENTION
  • The present invention provides a method for improving the air release of a lubricating oil in a hydraulic system. In a hydraulic system the lubricating oil is used not only to lubricate the machinery but also to transmit pressure. Air entrainment can be a particular issue in hydraulic systems, causing spongy or erratic operation of the hydraulics.
  • The air release is measured according to ASTM D3427 (Version 14a, 2015). Compressed air is blown through the lubricating oil, which has been heated to a temperature of 50° C. After the air flow is stopped, the time required for the air entrained in the oil to reduce in volume to 0.2% is recorded as the air release time. A desirable air release value is typically less than 3 minutes, preferably less than 60 seconds and most preferably less than 20 seconds.
  • The air release is improved compared to air release achieved using a lubricating oil which comprises less than 70% by mass of GTL base oil. The comparison is between substantially equivalent lubricating oils wherein the only difference is in the amount of GTL base oil that is present. For example, the comparison should be between lubricating oils that are of the same viscosity and that contain the same additives. In the comparative lubricating oil there will be a greater quantity of non-GTL base oil. The non-GTL base oil is, for example, a base oil from Group I, II or III of the API base oil categories. By incorporating at least 70% by mass of GTL base oil the inventors have observed improved air release times as compared to lubricating oils having less than 70% by mass of GTL base oil (and wherein the GTL base oil has been replaced by a Group I, II or III base oil).
  • The lubricating oil is supplied to the hydraulic system using standard methods.
  • The lubricating oil comprises at least 90% by mass, based upon the mass of the lubricating oil, of base oil. At least 70% by mass, based upon the mass of the base oil, is GTL base oil. Preferably at least 75% by mass is GTL base oil. GTL base oils are synthesised by the Fischer-Tropsch method of converting natural gas to liquid fuel. They have very low sulphur content and aromatic content compared with mineral oil base oils refined from crude oil and have a very high paraffin constituent ratio. Up to 30% by mass (and preferably up to 25% by mass), based upon the mass of the base oil, may be another type of base oil, including conventional base oils chosen from Groups I, II, and III of the API (American Petroleum Institute) base oil categories. In one embodiment of the invention, the base oil comprises at least 10% by mass of a base oil chosen from Group I, Group II or Group III.
  • The kinematic viscosity of the GTL base oil at 100° C. is from 2 to 20 cSt, preferably from 3 to 15 cSt and more preferably from 3 to 10 cSt. The viscosity is suitably measured using ASTM D445.
  • The lubricating oil comprises less than 10% by mass, based upon the mass of the lubricating oil, of additives.
  • Preferably the amount of additives is less than 5% by mass. Preferably the amount of additives is at least 0.5% by mass. The additives may include antioxidants, antiwear additives, demulsifiers, emulsifiers, rust and corrosion inhibitors, VI improvers and/or friction modifiers. The additives may be supplied as additive packages, e.g. an ashless additive package or a zinc-based additive package.
  • The kinematic viscosity of the lubricating oil at 40° C. is from 20 to 100 cSt, preferably from 25 to 80 cSt. The kinematic viscosity is suitably measured using ASTM D445 (ASTM D7042). This range of viscosities provides lubricating oils suitable for use in hydraulic systems.
  • The invention is further explained in detail below by means of examples, but the invention is in no way limited by these examples.
    • EXAMPLE 1
  • Eleven different base oil blends were prepared using combinations of three base oils:
      • 1) XHVI 8 (a Fischer-Tropsch derived oil available from Shell having a kinematic viscosity at 100° C. of approximately 8 cSt)
      • 2) Yubase 8 (a Group III base oil from SK Lubricants having a kinematic viscosity at 100° C. of approximately 8 cSt)
      • 3) Chevron 220 R (a Group II base oil from Chevron having a kinematic viscosity at 100° C. of approximately 8 cSt)
        The air release time of the base oil blends was tested using the ASTM D3427 method at 50° C. Table 1 gives the amount of each base oil (in weight % based upon the total weight of the blend) present in each blend and the air release time at 50° C. The blends in Table 1 are all ISO 46.
  • TABLE 1
    Air release
    XHVI Yubase Chevron time at 50° C.
    8 8 220 R (seconds)
    Blend 1 100 0 0 5
    Blend 2 75 25 0 5
    Blend 3 66.7 33.3 0 30
    Blend 4 50 50 0 40
    Blend 5 25 75 0 60
    Blend 6 0 100 0 77
    Blend 7 0 0 100 61
    Blend 8 50 0 50 46
    Blend 9 90 0 10 5
    Blend 10 80 0 20 5
    Blend 11 75 0 25 15
  • The results show very fast air release for the blends having from 75 to 100 wt % GTL (Blends 1, 2, 9, 10 and 11). All the other blends, having less than 70% GTL, have significantly slower air release times.
    • EXAMPLE 2
  • Air release times are typically considered to get worse with the addition of additives. To demonstrate that fully formulated hydraulic oils according to the invention are resistant to changes in air release, blends were prepared using XHVI 8 (a Fischer-Tropsch derived oil available from Shell having a viscosity at 100° C. of approximately 8 cSt) and different amounts of either of the following:
  • 1) Additive Package 1 (ashless additive package)
  • 2) Additive Package 2 (zinc based additive package)
  • Table 2 gives the blend compositions (in weight % based upon the total weight of the blend) for each of the additive packages with XHVI 8 and the corresponding air release times:
  • TABLE 2
    Air Release
    Additive Additive XHVI Time at 50° C.
    Package 1 Package 2 8 (seconds)
    Blend 1 0 0 100 5
    Blend 12 1 0 99 10
    Blend 13 2.5 0 97.5 10
    Blend 14 5 0 95 10
    Blend 15 0 1 99 10
    Blend 16 0 2 98 10
    Blend 17 0 3 97 10
    Blend 18 0 4 96 10
    Blend 19 0 5 95 10
    Blend 20 0 10 90 10
  • The results show that the addition of additive packages (either ashless or zinc based) does not significantly affect the air release properties of the lubricating

Claims (6)

1. A method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system;
wherein the lubricating oil comprises at least 90% by mass, based upon the mass of the lubricating oil, of base oil, and wherein at least 70% by mass, based upon the mass of the base oil, is GTL base oil;
wherein the viscosity of the GTL base oil at 100° C. is from 2 to 20 cSt;
wherein the lubricating oil comprises less than 10% by mass, based upon the mass of the lubricating oil, of additives;
wherein the viscosity of the lubricating oil at 40° C. is from 20 to 100 cSt; and
wherein air release is measured according to ASTM D3427 and is improved as compared to air release achieved using a lubricating oil which comprises less than 70% by mass of GTL base oil.
2. The method according to claim 1, wherein the base oil comprises at least 10% by mass of a base oil chosen from Group I, Group II or Group III.
3. The method according to claim 1, wherein the viscosity of the GTL base oil at 100° C. is from 3 to 10 cSt.
4. The method according to claim 1, wherein the lubricating oil comprises less than 5% by mass, based upon the mass of the lubricating oil, of additives.
5. The method according to claim 1, wherein the lubricating oil comprises at least 0.5% by mass, based upon the mass of the lubricating oil, of additives.
6. The method according to claim 1, wherein the viscosity of the lubricating oil at 40° C. is from 25 to 80 cSt.
US15/777,724 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil in a hydraulic system Abandoned US20180334633A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/777,724 US20180334633A1 (en) 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil in a hydraulic system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201562259157P 2015-11-24 2015-11-24
PCT/EP2016/078469 WO2017089357A1 (en) 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil in a hydraulic system
US15/777,724 US20180334633A1 (en) 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil in a hydraulic system

Publications (1)

Publication Number Publication Date
US20180334633A1 true US20180334633A1 (en) 2018-11-22

Family

ID=57354397

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/777,724 Abandoned US20180334633A1 (en) 2015-11-24 2016-11-22 Method for improving the air release of a lubricating oil in a hydraulic system

Country Status (7)

Country Link
US (1) US20180334633A1 (en)
EP (1) EP3380595B1 (en)
JP (1) JP7190353B2 (en)
CN (1) CN108350388A (en)
BR (1) BR112018010648B1 (en)
RU (1) RU2730514C2 (en)
WO (1) WO2017089357A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120936698A (en) 2023-04-05 2025-11-11 国际壳牌研究有限公司 Lubricating oil composition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070631A2 (en) * 2001-03-05 2002-09-12 Shell Internationale Research Maatschappij B.V. Process to prepare a lubricating base oil
US20070293408A1 (en) * 2005-03-11 2007-12-20 Chevron Corporation Hydraulic Fluid Compositions and Preparation Thereof
US7435327B2 (en) * 2004-12-16 2008-10-14 Chevron U.S.A. Inc. Hydraulic oil with excellent air release and low foaming tendency
WO2009115502A2 (en) * 2008-03-18 2009-09-24 Shell Internationale Research Maatschappij B.V. Lubricating composition
US7820600B2 (en) * 2005-06-03 2010-10-26 Exxonmobil Research And Engineering Company Lubricant and method for improving air release using ashless detergents

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7547666B2 (en) * 2005-12-21 2009-06-16 Chevron U.S.A. Inc. Ashless lubricating oil with high oxidation stability
US7662271B2 (en) 2005-12-21 2010-02-16 Chevron U.S.A. Inc. Lubricating oil with high oxidation stability
US20080096779A1 (en) * 2005-12-21 2008-04-24 Chevron U.S.A. Inc. Turbine oil composition method for making thereof
CA2658817C (en) * 2006-07-28 2015-06-16 Exxonmobil Research And Engineering Company Engine crankcase lubricant compositions with air release characteristics, their preparation and use
EP2111390A4 (en) * 2007-01-19 2012-03-28 Exxonmobil Res & Eng Co HYDRAULIC OILS WITH HIGH EFFICIENCY
US7910530B2 (en) * 2007-03-30 2011-03-22 Exxonmobil Research And Engineering Company Method for improving the air release rate of GTL base stock lubricants using synthetic ester, and composition
WO2009021958A2 (en) * 2007-08-13 2009-02-19 Shell Internationale Research Maatschappij B.V. Lubricating base oil blend
US8221614B2 (en) * 2007-12-07 2012-07-17 Shell Oil Company Base oil formulations
US20140371117A1 (en) * 2013-06-18 2014-12-18 Shell Oil Company Lubricating composition

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070631A2 (en) * 2001-03-05 2002-09-12 Shell Internationale Research Maatschappij B.V. Process to prepare a lubricating base oil
US7435327B2 (en) * 2004-12-16 2008-10-14 Chevron U.S.A. Inc. Hydraulic oil with excellent air release and low foaming tendency
US20070293408A1 (en) * 2005-03-11 2007-12-20 Chevron Corporation Hydraulic Fluid Compositions and Preparation Thereof
US7820600B2 (en) * 2005-06-03 2010-10-26 Exxonmobil Research And Engineering Company Lubricant and method for improving air release using ashless detergents
WO2009115502A2 (en) * 2008-03-18 2009-09-24 Shell Internationale Research Maatschappij B.V. Lubricating composition

Also Published As

Publication number Publication date
EP3380595B1 (en) 2024-07-31
BR112018010648B1 (en) 2020-11-17
JP2018535308A (en) 2018-11-29
JP7190353B2 (en) 2022-12-15
BR112018010648A2 (en) 2018-11-13
BR112018010648A8 (en) 2019-02-26
CN108350388A (en) 2018-07-31
RU2730514C2 (en) 2020-08-24
WO2017089357A1 (en) 2017-06-01
RU2018122790A (en) 2019-12-25
EP3380595A1 (en) 2018-10-03
RU2018122790A3 (en) 2020-03-17

Similar Documents

Publication Publication Date Title
JP5638256B2 (en) Lubricating oil composition
US20180371352A1 (en) Method for improving the air release of a lubricating oil
WO2012138733A3 (en) Low viscosity marine cylinder lubricating oil compositions
RU2012102293A (en) LUBRICANT COMPOSITION
US11535808B2 (en) Lubricating oil composition
US20150337231A1 (en) Lubricant oil composition for rotary compressor
EP3760697B1 (en) Lubricant composition, its method of producing and use in a mechanical device
JP2015535555A (en) Industrial gear oil that reduces the operating temperature of the gearbox
US20180334633A1 (en) Method for improving the air release of a lubricating oil in a hydraulic system
US10597600B2 (en) Lubricating oil composition
US11421178B2 (en) Lubricating oil composition for air compressors, air compressor lubricating method, and air compressor
CN103906830B (en) Lubricant with improved seal compatibility
CN110914387B (en) Lubricating oil composition
JP2011236407A (en) Lubricating composition
WO2013098354A1 (en) An engine oil for motor vehicles
WO2019138948A1 (en) Lubricating oil composition and base oil
CN108431186A (en) Lubricant composition for internal combustion engine
RU2757770C2 (en) Composition of lubricating oil for hydraulic equipment equipped with electronic control devices
RU2394877C2 (en) Oil for pumping assemblies
EP3230420A1 (en) Lubricating oil composition for sliding glide surface
WO2022138523A1 (en) Lubricant composition
US20220275303A1 (en) Lubricating oil composition
KR20100037749A (en) Hydraulic oil composition having longer drain interval for construction equipment
JP2013216904A (en) Lubricating oil composition

Legal Events

Date Code Title Description
AS Assignment

Owner name: SHELL OIL COMPANY, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:COLEMAN, ANNE TAYLOR;GULLAPALLI, SRAVANI;KENSLER, JENNIFER LIN KARAM;SIGNING DATES FROM 20180515 TO 20180519;REEL/FRAME:045859/0634

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION