WO2009018089A1 - Compositions d'huile électriquement isolante et préparation de celle-ci - Google Patents

Compositions d'huile électriquement isolante et préparation de celle-ci Download PDF

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Publication number
WO2009018089A1
WO2009018089A1 PCT/US2008/071019 US2008071019W WO2009018089A1 WO 2009018089 A1 WO2009018089 A1 WO 2009018089A1 US 2008071019 W US2008071019 W US 2008071019W WO 2009018089 A1 WO2009018089 A1 WO 2009018089A1
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WIPO (PCT)
Prior art keywords
oil
composition
base oil
electrical insulating
astm
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PCT/US2008/071019
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English (en)
Inventor
Scott C. Deskin
John M. Rosenbaum
Nancy J. Bertrand
Doran Y. Lum
Thomas D'amico
Ravindra Shah
Original Assignee
Chevron U.S.A. Inc.
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Application filed by Chevron U.S.A. Inc. filed Critical Chevron U.S.A. Inc.
Priority to CN200880101056A priority Critical patent/CN101784646A/zh
Publication of WO2009018089A1 publication Critical patent/WO2009018089A1/fr

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    • 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
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    • C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
    • C10M159/02—Natural products
    • C10M159/04—Petroleum fractions, e.g. tars, solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
    • H01B3/22—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils hydrocarbons
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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Definitions

  • US Patent No. 6.790.386 discloses a dielectric fluid comprising an iso- paraffinic base oil and hydrogen donor compound, which may be a substituted or partially saturated aromatic compound, e.g., saturated pniyring aromatics, aklyated one ring aromaties, akylated polyring aromatics , partially saturated alkylated polyring aromatics , and mixtures thereof.
  • an iso- paraffinic base oil and hydrogen donor compound which may be a substituted or partially saturated aromatic compound, e.g., saturated pniyring aromatics, aklyated one ring aromaties, akylated polyring aromatics , partially saturated alkylated polyring aromatics , and mixtures thereof.
  • Fischer-Tropsch derived means that the product, fraction, or feed originates from or is produced at some stage by a Fischer-Tropsch process.
  • Fischer-Tropsch base oil may be used interchangeably with “FT base oil,” “FTBO,” “GTL base oil” (GTL: gas-to-liquid), or “Fischer-Tropsch derived base oil.”
  • FT base oil FTBO
  • GTL base oil GTL: gas-to-liquid
  • Fischer-Tropsch derived base oil isomerized base oil refers to a base oil made by isomerization of a waxy feed.
  • a "waxy feed" comprises at least 40 wt% n-paraffins. In one embodiment, the waxy feed comprises greater than 50 wt% n-paraffins. In another embodiment, greater than 75 wt% n-paraffins. In one embodiment, the waxy feed also has very low levels of nitrogen and sulphur, e.g., less than 25 ppm total combined nitrogen and sulfur, or in other embodiments less than 20 ppm.
  • PAO poly-alpha-olefin
  • the molecules of an isomerized base oil have a more linear structure, comprising a relatively long backbone with short branches.
  • the classic textbook description of a PAO is a star-shaped molecule, and in particular tridecane, which is illustrated as three decane molecules attached at a central point. While a star-shaped molecules is theoretical, nevertheless PAO molecules have fewer and longer branches that the hydrocarbon molecules that make up the isomerized base oil disclosed herein.
  • “Molecules with cycloparaffinic functionality” mean any molecule that is, or contains as one or more substituents, a monocyclic or a fused multicyclic saturated hydrocarbon group.
  • Oxidator BN measures the response of a lubricating oil in a simulated application. High values, or long times to adsorb one liter of oxygen, indicate good stability. Oxidator BN can be measured via a Dornte-type oxygen absorption apparatus (R. W. Dornte "Oxidation of White Oils," Industrial and Engineering
  • the steps are as follows: A) Prepare a solution of 5- 10% of the test hydrocarbon in deuterochloroform. B) Acquire a normal proton spectrum of at least 12 ppm spectral width and accurately reference the chemical shift (ppm) axis, with the instrument having sufficient gain range to acquire a signal without overloading the receiver/ADC, e.g., when a 30 degree pulse is applied, the instrument having a minimum signal digitization dynamic range of 65,000. In one embodiment, the instrument has a dynamic range of at least 260,000. C) Measure the integral intensities between: 6.0-4.5 ppm (olefin); 2.2-1.9 ppm (allylic); and 1.9-0.5 ppm (saturate).
  • Fischer- 1 ropsch process is a catalyzed chemical reaction in which carbon monoxide and hydrogen are converted into liquid hydrocarbons of various forms including a light reaction product and a waxy reaction product, with both being substantially paraffinic [050]
  • the isomerized base oil has consecutive numbers of carbon atoms and has less than 10 wt% naphthenic carbon by n-d-M.
  • the isomerized base oil made from a waxy feed has a kinematic viscosity at 100°C between 1.5 and 3.5 mm 2 /s.
  • the isomerized base oil has a kinematic viscosity between 1.5 and 4.0 mm 2 /s and a Noack volatility less than the Noack volatility calculated by the following equation: 160 - 40 (Kinematic Viscosity at 100°C). [054] In one embodiment, the isomerized base oil has a kinematic viscosity at
  • the isomerized base oil contains between 2 and 10 % naphthenic carbon as measured by n-d-M.
  • the base oil has a kinematic viscosity of 1.5 - 3.0 mm 2 /s at 100°C. and 2-3 % naphthenic carbon.
  • a kinematic viscosity of 3 - 6 mm 2 /s at 100°C. and 2.7 - 5 % naphthenic carbon In a fourth embodiment, a kinematic viscosity of 10 - 30 mm 2 /s at 100°C. and greater than 5.2 % naphthenic carbon.
  • the electrical insulating oil composition employs a base oil that consists of at least one of the isomerized base oils described above.
  • the composition consists essentially of at least a Fischer-Tropsch base oil.
  • the composition employs at least a Fischer- Tropsch base oil and optionally 5 to 95 wt. % of at least another type of oil, e.g., conventionally used mineral oils, synthetic hydrocarbon oils or synthetic ester oils, or mixtures thereof depending on the application.
  • the pour point reducing blend component is an isomerized petroleum derived base oil containing material having a boiling range above about 1050°F.
  • the isomerized bottoms material is solvent dewaxed prior to being used as a pour point reducing blend component. The waxy product further separated during solvent dewaxing from the pour point reducing blend component were found to display excellent improved pour point depressing properties compared to the oily product recovered after the solvent dewaxing.
  • the pour point reducing blend component has an average degree of branching in the molecules in the range of 6.5 - 10 alkyl branches per 100 carbon atoms. In another embodiment, the pour point reducing blend component has an average molecular weight between 600 - 1100. In a third embodiment, between 700 - 1000. In one embodiment, the pour point reducing blend component has a kinematic viscosity at 100°C. of 8 - 30 mm 2 /s, with the 10% point of the boiling range of the bottoms falling between about 850- 1050°F. In yet another embodiment, the pour point reducing blend component has a kinematic viscosity at 100°C. of 15- 20 mm 2 /s and a pour point of -8 to -12°C.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne une composition d'huile électriquement isolante comprenant un reformat lourd comme agent anti-dégazage, munie d'une excellente tendance au dégazage. Dans un mode de réalisation, la composition affiche une performance de dégazage < 30 µl par minute tel que mesuré conformément à la norme ASTM D2300-00. Dans un deuxième mode de réalisation, la composition affiche une performance de dégazage < 0 µl par minute. Dans un troisième mode de réalisation, la composition affiche une tendance au dégazage négative aussi faible que < -70 µl par minute.
PCT/US2008/071019 2007-07-31 2008-07-24 Compositions d'huile électriquement isolante et préparation de celle-ci WO2009018089A1 (fr)

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