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

Definitions

• the invention relates to a use 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 1mm) 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 1mm 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.
• US 2006/131210 A discloses a hydraulic oil, comprising: a. a lubricant base oil having: i. an average molecular weight greater than 475; ii. a viscosity index greater than 140; iii. a weight percent olefins less than 10; and b. an antiwear hydraulic oil additive package; wherein the hydraulic oil has: i. an air release by ASTM D 3427-03 of less than 0.8 minutes at 50°C., and ii. a sequence II foam tendency by ASTM D 892-03 of less than 50 ml.
• the lubricant base oil may be Fischer-Tropsch derived.
• US 2008/096779 A discloses a turbine oil composition
• a turbine oil composition comprising an admixture of: (a) a major amount of at least an isomerized base oil having consecutive numbers of carbon atoms and has less than 25 wt % naphthenic carbon by n-d-M; and (b) a minor amount of one or more standard turbine oil additive packages; wherein the turbine oil composition has a viscosity index of greater than about 150.
• the isomerized base oil may be a Fischer-Tropsch derived base oil made from a waxy feed.
• WO 2009/115502 A discloses a lubricating composition
• a lubricating composition comprising a base oil and one or more additives, wherein the composition has a heat capacity (according to ASTM E 1269) at 90°C of above 2.25 J/g°C.
• the composition may comprise at least 30 wt.% of a base oil selected from the group consisting of a poly-alphaolefin base oil and a Fischer-Tropsch derived base oil or a combination thereof.
• the lubricating composition may have an air release of at most 2.0 minutes according to IP 313.
• the lubricating composition may be used as a hydraulic oil.
• the present inventors have sought to improve the air entrainment properties of lubricating oils that are used in hydraulic systems.
• the invention provides a use, in a lubricating oil comprising at least 90% by mass, based upon the mass of the lubricating oil, of base oil wherein the base oil comprises at least 10% by mass of a base oil chosen from Group I, Group II or Group III, of at least 70% by mass, based upon the mass of the base oil, of GTL base oil to improve the air release of a lubricating oil in a hydraulic system, wherein the viscosity of the GTL base oil at 100°C is from 2 to 20cSt; 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 100cSt; 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 base oil comprises at least 10% by mass of a base oil chosen
• 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 use 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.
• 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 20cSt, preferably from 3 to 15cSt and more preferably from 3 to 10cSt.
• 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.
• the amount of additives is at least 0.50 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 100cSt, preferably from 25 to 80cSt.
• 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 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 XHVI 8 Yubase 8 Chevron 220 R Air release time at 50°C (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
• Blends were prepared using XHVI 8 (a Fischer-Tropsch derived oil available from Shell having a viscosity at 100°C of approximately 8cSt) 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 Additive Package 1 Additive Package 2 XHVI 8 Air Release Time at 50°C (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
• XHVI 8 a Fischer-Tropsch derived oil available from Shell having a viscosity at 100°C of approximately 8c

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• 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)

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• 2016
  • 2016-11-22 JP JP2018545688A patent/JP7190353B2/ja active Active
  • 2016-11-22 EP EP16798540.7A patent/EP3380595B1/en active Active
  • 2016-11-22 CN CN201680068016.3A patent/CN108350388A/zh active Pending
  • 2016-11-22 RU RU2018122790A patent/RU2730514C2/ru active
  • 2016-11-22 US US15/777,724 patent/US20180334633A1/en not_active Abandoned
  • 2016-11-22 WO PCT/EP2016/078469 patent/WO2017089357A1/en not_active Ceased
  • 2016-11-22 BR BR112018010648-8A patent/BR112018010648B1/pt active IP Right Grant

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