EP0447916B1 - Composition d'huile pour moteur - Google Patents

Composition d'huile pour moteur Download PDF

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Publication number
EP0447916B1
EP0447916B1 EP91103711A EP91103711A EP0447916B1 EP 0447916 B1 EP0447916 B1 EP 0447916B1 EP 91103711 A EP91103711 A EP 91103711A EP 91103711 A EP91103711 A EP 91103711A EP 0447916 B1 EP0447916 B1 EP 0447916B1
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EP
European Patent Office
Prior art keywords
weight
oil
engine oil
metal salt
overbasic
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.)
Revoked
Application number
EP91103711A
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German (de)
English (en)
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EP0447916A1 (fr
Inventor
Kiyoshi Inoue
Jiichi Igarashi
Mituaki Ishimaru
Mineo Kagaya
Masakuni Hirata
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.)
Eneos Corp
Original Assignee
Nippon Oil Corp
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Application filed by Nippon Oil Corp filed Critical Nippon Oil Corp
Publication of EP0447916A1 publication Critical patent/EP0447916A1/fr
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
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    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
    • C10M2223/065—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds containing sulfur
    • 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/12—Groups 6 or 16
    • 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
    • C10N2040/25—Internal-combustion engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/251—Alcohol-fuelled engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
    • C10N2040/253—Small diesel engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/28—Rotary engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • This invention relates to an engine oil composition, and more particularly to an engine oil composition useful as a lubricating oil for gasoline engine, diesel engine, and the like.
  • Addition of friction modifiersto lubricating oil is indispensable especially in latest fuel-saving lubricating oil, and many compounds have been heretofore been found to be useful. However, it has been observed that even though these compounds possess a high fuel-saving effect on the fresh lubricating oil, they gradually lose said effect in the aged lubricating oil due to degradation during engine operation. While many antioxidants have widely been used heretofore and proved to be effective to some extent for preventing the degradation, they could not necessarily provide satisfactory results in view of their lubricating performance.
  • the present invention is based on a discovery whereby excellent fuel-saving effect can be attained by combining a specific overbasic metallic detergent comprising an alkaline earth metal and being prepared by use of boric acid or boric acid anhydride as reactant with a molybdenum compound as friction modifier and an antioxidant, as defined hereinafter.
  • the present invention therefore provides an engine oil composition having a specific combination of lubricating additives and having an excellent fuel-saving effect over a long period of time.
  • It is an object of the subject invention to provide a fuel-saving engine oil composition comprising a major amount of a lubricating base oil and as essential components
  • EP-A-0 317 354 discloses an improved lubricant composition for enhanced fuel economy which comprises four essential components A to D.
  • Component A is comprised of a mixture of a calcium overbased detergent inhibitor and of a magnesium-overbased detergent inhibitor, such overbased products being prepared by carbonating fully neutralized sulfonic and/or carboxylic acids with CO2. Inter alia there can be used Mg borate to neutralize such acids.
  • DE-OS 2 028 703 discloses antioxidant mixtures for luboils comprising an oil dispersion of a metal borate, like Ca(BO2)2, and an aromatic compound with an OH-group or a mercapto group bound directly to the aromatic ring structure.
  • a metal borate like Ca(BO2)2
  • the metal borate is prepared by reacting a metal alcoholate with a boric acid, an anhydride, or an ester of such acid.
  • Either mineral oils or synthetic oils may be used as the lubricating base oils of the instant invention.
  • Any paraffinic or naphthenic lubricating base oils may be acceptable wherein said base oils are manufactured by a process consisting mainly of topping crude oil followed by vacuum distillation to give a lubricating oil fraction, and refining said lubricating fraction by a process selected from the group consisting of solvent deasphalting, solvent extraction, hydro-cracking, solvent dewaxing, catalytic dewaxing, hydro-refining, sulfuric acid treating, and clay treating.
  • the synthetic oils of the present invention include, ⁇ -olefin polymers (polybutenes, octene-1 oligomers, decene-1 oligomers, and the like), alkylbenzenes, alkylnaphthalenes, diesters (ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-3-ethylhexyl sebacate, and the like), polyol esters (trimethylolpropane caprilate, trimethylolpropane pelargonate, pentaerythritol- 2-ethyl hexanoate, pentaerythritol pelargonate, and the like), polyoxyalkylene glycol, polyphenyl ether, silicon oils, perfluoroalkyl ethers, and mixtures thereof.
  • Preferred kinematic viscosity of these lubricating base oils is in a range of about 3 to 20.10 ⁇ 6 m2/s at 100°C.
  • the overbasic oil-soluble metal salts (a) of the present invention are prepared by a reaction of an oil-soluble alkaline-earth metal salt such as an oil-soluble alkaline-earth metal sulfonate, alkaline-earth metal salicylate, alkaline-earth metal pheneate or an alkaline-earth metal phosphonate, with an oxide or hydroxide of an alkaline-earth metal in the presence of boric acid or boric acid anhydride.
  • an oil-soluble alkaline-earth metal salt such as an oil-soluble alkaline-earth metal sulfonate, alkaline-earth metal salicylate, alkaline-earth metal pheneate or an alkaline-earth metal phosphonate
  • an oxide or hydroxide of an alkaline-earth metal in the presence of boric acid or boric acid anhydride.
  • oil-soluble alkaline-earth metal salts alkaline-earth metal salicylates are most appropriate.
  • the overbasic oil-soluble metal salts (a) of the present invention have a total base number of about 100 or more, and preferably 170 or more, and a particle size of less than about 0.1 ⁇ m, and preferably less than about 0.05 ⁇ m.
  • any methods for preparing the overbasic metal salts may be acceptable.
  • a method which comprises reacting an oil-soluble metal salt as aforesaid, a hydroxide or an oxide of alkaline-earth metal, and boric acid or boric acid anhydride in the presence of water, an alcohol such as methanol, ethanol, propanol, or butanol, and a diluent such as benzene, toluene or xylene at a temperature of about 20 to 200 °C for about 2 to 8 hours, heating the mixture at about 100 to 200 °C to remove water, followed by removing the alcohol and the diluent if necessary, to give an overbasic metal salt.
  • the reaction conditions may be employed suitably depending on raw material type, the amount of reactants and the like. Typical of such prior art practices are those disclosed in Japanese patent Publications Nos. 116688 /60 and 204208 /61.
  • Such an overbasic alkali-earth metal salt prepared according to the present invention is present in an amount of 0.01 to 30 % by weight, and preferably of 0.05 to 5 % by weight, on the basis of the total amount of the composition.
  • a content of less than 0.01 % by weight is not to be recommended because of the insufficient realisation of the fuel-saving effect of the overbasic metal salt, especially since the effect can not be maintained over a long period of time. Inversely, when it is in excess of 30 % by weight, there is no additional merits due to the excessive addition.
  • Other overbasic oil-soluble metal salts such as those prepared by use of alkaline-earth-metal carbonates can not provide an engine oil composition which can persistently maintain the fuel-saving effect throughout the engine operation.
  • Typical friction modifiers include molybdenum sulfide diethyldithiophosphate, molybdenum sulfide dipropyldithiophosphate, molybdenum sulfide dibutyldithiophosphate, molybdenum sulfide dipentyldithiophosphate, molybdenum sulfide dihexyldithiophosphate, molybdenum sulfide dioctyldithiophosphate, molybdenum sulfide didecyldithiophosphate, molybdenum sulfide didodecyldithiophosphate, molybdenum sulfide di(butylphenyl) dithiophosphate, Molybdenum sulfide di(nonylphenyl) dithiophosphate, oxymolybdenum sulfide diethyldithiophosphate,
  • the content of the friction modifier (b) of the present invention is in the range of 0.01 to 5 % by weight, and preferably 0.05 to 2 % by weight, on the basis of the total amount of the composition.
  • a content of less than 0.01 % by weight is not recommended because of the insufficient realisation of the friction reducing effect. Inversely, when it is in excess of 5 % by weight, there is no additional merits due to the excessive addition.
  • antioxidants (c) there are employed such of the phenol type, amine type, sulfur type, zinc thiophosphate type, and phenothiazine type.
  • they include diphenylamine, p,p′-dioctyl diphenylamine, p,p′-dinonyl diphenylamine, p,p′ -didodecyl diphenylamine, phenyl- ⁇ -naphthylamine, p-octylpenyl- ⁇ -naphthylamine, p-nonylphenyl- ⁇ -naphthylamine, p-dodecylphenyl- ⁇ -naphthylamine, 2,6-di-tert.-butylphenol, 2,6-di-tert.-butyl-p-cresol, 2,6-di-tert.-butyl-4-ethylphenol, 2,2′-methylene-bis(4-methyl-6-tert.-butylphenol), 2,2′-methylene-bis(4-ethyl-6-tert.-butylphenol),
  • the content of the antioxidant (c) of the present invention is in the range of 0.01 to 5 % by weight, and preferably 0.1 to 2 % by weight, on the basis of the total amount of the composition.
  • a content of less than 0.01 % by weight is not recommended because the antioxidation effect can be realized only for a short period if time. Inversely, when the amount is in an excess of 5 % by weight, there is no additional merits due to the excessive addition.
  • the following conventional lubricating oil additives can be additionally used to improve further the performance of the present composition if necessary, in so far as they do not deviate from the gist of the present invention.
  • these additives include extreme pressure additives such as tricresyl phosphate, triphenyl phosphate, zinc dithiophosphates,; rust preventives such as petroleum sulfonates, dinonyl naphthalene sulfonates and the like; metal deactivating agents such as benzotriazole and the like; metal-based detergents such as alkaline-earth metal sulfonates, alkaline-earth metal salicylates, alkaline-earth metal pheneates, alkaline-earth metal phosphonates and the like; ashless dispersants such as succinimide, succinic esters, benzylamine and the like; defoamers such as silicon oils and the like; viscosity index improvers and pour point depress
  • the content of the viscosity index improver is in the range of about 1 to 30 % by weight
  • the defoamer is in the range of about 0.0005 to 1 % by weight
  • the metal deactivating agent is in the range of about 0.005 to 1 % by weight
  • other additives are used in amounts of about 0.1 to 15 % by weight respectively on the basis of the total amount of the composition.
  • the engine oil compositions of the present invention are suitable for two stroke and four stroke gasoline engine oils, diesel engine oil for land use, marine diesel engine oil, and the like.
  • the oxidation degraded sample oils were prepared by oxidizing new sample oils under the following conditions on the basis of "the method for testing oxidaton stability of lubricating oil" prescribed by JIS K 2514 3.1:
  • Table 1 shows the test results.
  • the engine oil composition according to the present invention has excellent performance as an engine oil in which the fuel-saving effect can be maintained persistently throughout the engine operation because of the synergism of each component.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Claims (5)

  1. Composition d'huile pour moteur comportant une quantité prépondérante d'huile de base lubrifiante et comme composants essentiels:
    (a) 0,01 à 30 % en poids d'un sel métallique surbasique soluble dans l'huile qui est le produit de la réaction d'un sel métallique soluble dans l'huile avec un oxyde ou un hydroxyde métallique alcalino-terreux en présence d'acide borique ou d'anhydride borique,
    (b) 0,01 à 5 % en poids d'un modificateur de friction à base de composé du molybdène, et
    (c) 0,01 à 5 % en poids d'un antioxydant, choisi dans le groupe des antioxydants de type phénol, de type amine, de type soufre, de type thiophosphate de zinc et de type phénothiazine,
       pourcentages calculés par rapport à la quantité totale de composition.
  2. Composition d'huile pour moteur selon la revendication 1, caractérisée en ce que le métal alcalino-terreux est le calcium et l'antioxydant est une combinaison d'antioxydants de type phénol et de type amine.
  3. Composition d'huile pour moteur selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que la quantité de sel métallique surbasique soluble dans l'huile est comprise entre 0,05 et 5 % en poids, la quantité de composé du molybdène est comprise entre 0,05 et 2 % en poids et la quantité d'antioxydants est comprise entre 0,1 et 2 % en poids.
  4. Composition d'huile pour moteur selon l'une quelconque des revendications 1, 2 ou 3, caractérisée en ce que le sel métallique surbasique soluble dans l'huile a un indice de basicité d'au moins 100 environ et une taille de particule de moins de 0,1 µm environ.
  5. Composition d'huile pour moteur selon l'une quelconque des revendications 1, 2 ou 3, caractérisée en ce que le sel métallique surbasique soluble dans l'huile a un indice de basicité d'au moins 170 environ et une taille de particule de moins de 0,05 µm environ.
EP91103711A 1990-03-16 1991-03-11 Composition d'huile pour moteur Revoked EP0447916B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2066315A JP2617807B2 (ja) 1990-03-16 1990-03-16 エンジン油組成物
JP66315/90 1990-03-16

Publications (2)

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EP0447916A1 EP0447916A1 (fr) 1991-09-25
EP0447916B1 true EP0447916B1 (fr) 1994-06-01

Family

ID=13312276

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EP91103711A Revoked EP0447916B1 (fr) 1990-03-16 1991-03-11 Composition d'huile pour moteur

Country Status (3)

Country Link
EP (1) EP0447916B1 (fr)
JP (1) JP2617807B2 (fr)
DE (1) DE69102172T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2722017C2 (ru) * 2015-07-16 2020-05-26 Эфтон Кемикал Корпорейшн Смазки с магнием и их применение для уменьшения преждевременного воспламенения смеси при низких оборотах
US11155764B2 (en) 2016-05-05 2021-10-26 Afton Chemical Corporation Lubricants for use in boosted engines

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JP2911668B2 (ja) * 1991-12-12 1999-06-23 出光興産株式会社 エンジン油組成物
JPH05186789A (ja) * 1992-01-09 1993-07-27 Tonen Corp 潤滑油組成物
CA2086970A1 (fr) * 1992-01-24 1993-07-25 Michelle M. Cervenka Compositions d'huiles de graissage a basse teneur en cendres
JP3608805B2 (ja) * 1993-04-30 2005-01-12 東燃ゼネラル石油株式会社 潤滑油組成物
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JP2001187891A (ja) * 1995-04-21 2001-07-10 Hitachi Ltd 潤滑油組成物及び潤滑グリース組成物
WO1996037585A1 (fr) * 1995-05-26 1996-11-28 The Lubrizol Corporation Lubrifiants comprenant des compositions contenant du molybdene et leurs procedes d'utilisation
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US6797677B2 (en) * 2002-05-30 2004-09-28 Afton Chemical Corporation Antioxidant combination for oxidation and deposit control in lubricants containing molybdenum and alkylated phenothiazine
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Publication number Priority date Publication date Assignee Title
RU2722017C2 (ru) * 2015-07-16 2020-05-26 Эфтон Кемикал Корпорейшн Смазки с магнием и их применение для уменьшения преждевременного воспламенения смеси при низких оборотах
US11155764B2 (en) 2016-05-05 2021-10-26 Afton Chemical Corporation Lubricants for use in boosted engines

Also Published As

Publication number Publication date
JP2617807B2 (ja) 1997-06-04
EP0447916A1 (fr) 1991-09-25
DE69102172D1 (de) 1994-07-07
JPH03269094A (ja) 1991-11-29
DE69102172T2 (de) 1994-09-22

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