WO2010115595A1 - Marine engine lubrication - Google Patents
Marine engine lubrication Download PDFInfo
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- WO2010115595A1 WO2010115595A1 PCT/EP2010/002132 EP2010002132W WO2010115595A1 WO 2010115595 A1 WO2010115595 A1 WO 2010115595A1 EP 2010002132 W EP2010002132 W EP 2010002132W WO 2010115595 A1 WO2010115595 A1 WO 2010115595A1
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- hydrocarbyl
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- FVMDYYGIDFPZAX-UHFFFAOYSA-N OC(Cc1cccc(O)c1)=O Chemical compound OC(Cc1cccc(O)c1)=O FVMDYYGIDFPZAX-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
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- 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
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- 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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/12—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
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- 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
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- 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
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- 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
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- 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
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/127—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
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- 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
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- 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
- C10N2030/04—Detergent property or dispersant property
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- 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
Definitions
- This invention relates to a trunk piston marine engine lubricating composition for a medium-speed four-stroke compression-ignited (diesel) marine engine and lubrication of such an engine.
- Heavy Fuel Oil is the heaviest fraction of petroleum distillate and comprises a complex mixture of molecules including up to 15% of asphaltenes, defined as the fraction of petroleum distillate that is insoluble in an excess of aliphatic hydrocarbon (e.g. heptane) but which is soluble in aromatic solvents (e.g. toluene). Asphaltenes can enter the engine lubricant as contaminants either via the cylinder or the fuel pumps and injectors, and asphaltene precipitation can then occur, manifested in 'black paint' or 'black sludge' in the engine.
- asphaltenes can enter the engine lubricant as contaminants either via the cylinder or the fuel pumps and injectors, and asphaltene precipitation can then occur, manifested in 'black paint' or 'black sludge' in the engine.
- trunk piston engine oils 'TPEO's
- WO 96/26995 discloses the use of a hydrocarbyl-substituted phenol to reduce 'black paint' in a diesel engine.
- WO 96/26996 discloses the use of a demulsifier for water-in-oil emulsions, for example, a polyoxyalkylene polyol, to reduce 'black paint' in diesel engines.
- US-B2-7 ,053,027 describes use of one or more overbased metal carboxylate detergents in combination with an antiwear additive in a dispersant-free TPEO.
- WO 2008/128656 describes a solution by use of an overbased metal hydrocarbyl- substituted hydroxybenzoate detergent having a basicity index of less than 2 and a degree of carbonation of 80% or greater in a marine trunk piston engine lubricant to reduce asphaltene precipitation in the lubricant.
- lubricants comprising a Group II basestock, which has a higher basestock saturate level than a Group I basestock.
- a first aspect of the invention is a trunk piston marine engine lubricating oil composition for improving asphaltene handling in use thereof, in operation of the engine when fuelled by a heavy fuel oil, which composition comprises or is made by admixing an oil of lubricating viscosity, in a major amount, containing 50 mass % or more of a Group II basestock, and, in respective minor amounts:
- a second aspect of the invention is the use of a detergent (A) in combination with a carboxylic acid, anhydride, ester or amide (B) as defined in, and in the amounts stated in, the first aspect of the invention in a trunk piston marine lubricating oil composition for a medium- speed compression-ignited marine engine, which composition comprises an oil of lubricating viscosity in a major amount and contains 50 mass % or more of a Group II basestock, to improve asphaltene handling during operation of the engine, fueled by a heavy fuel oil, and its lubrication by the composition, in comparison with analogous operation when the same amount of detergent (A) is used in the absence of (B).
- a third aspect of the invention is a method of operating a trunk piston medium-speed compression-ignited marine engine comprising
- a fourth aspect of the invention is a method of dispersing asphaltenes in a trunk piston marine lubricating oil composition during its lubrication of surfaces of the combustion chamber of a medium-speed compression-ignited marine engine and operation of the engine, which method comprises
- active ingredients or “(a.i.)” refers to additive material that is not diluent or solvent
- “minor amount” means less than 50 mass % of a composition
- TBN total base number as measured by ASTM D2896.
- KVlOO means kinematic viscosity at 100°C as measured by ASTM D445.
- the lubricating oils may range in viscosity from light distillate mineral oils to heavy lubrica ittiinnjg oils. Generally, the viscosity of the oil ranges from 2 to 40 mm 2 /sec, as measured at 100 0 C.
- Natural oils include animal oils and vegetable oils (e.g., caster oil, lard oil); liquid petroleum oils and hydrorefined, solvent-treated or acid-treated mineral oils of the paraffinic, naphthenic and mixed paraffinic-naphthenic types. Oils of lubricating viscosity derived from coal or shale also serve as useful base oils.
- Synthetic lubricating oils include hydrocarbon oils and halo-substituted hydrocarbon oils such as polymerized and interpolymerized olefins (e.g., polybutylenes, polypropylenes, propylene-isobutylene copolymers, chlorinated polybutylenes, poly(l-hexenes), poly(l- octenes), poly(l-decenes)); alkybenzenes (e.g., dodecylbenzenes, tetradecylbenzenes, dinonylbenzenes, di(2-ethylhexyl)benzenes); polyphenyls (e.g., biphenyls, terphenyls, alkylated polyphenols); and alkylated diphenyl ethers and alkylated diphenyl sulphides and derivative, analogs and homologs thereof.
- Alkylene oxide polymers and interpolymers and derivatives thereof where the terminal hydroxyl groups have been modified by esterification, etherification, etc. constitute another class of known synthetic lubricating oils. These are exemplified by polyoxyalkylene polymers prepared by polymerization of ethylene oxide or propylene oxide, and the alkyl and aryl ethers of polyoxyalkylene polymers (e.g., methyl-polyiso-propylene glycol ether having a molecular weight of 1000 or diphenyl ether of poly-ethylene glycol having a molecular weight of 1000 to 1500); and mono- and polycarboxylic esters thereof, for example, the acetic acid esters, mixed C 3 -C 8 fatty acid esters and Ci 3 Oxo acid diester of tetraethylene glycol.
- polyoxyalkylene polymers prepared by polymerization of ethylene oxide or propylene oxide
- alkyl and aryl ethers of polyoxyalkylene polymers e.g.
- Another suitable class of synthetic lubricating oils comprises the esters of dicarboxylic acids (e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebasic acid, fumaric acid, adipic acid, linoleic acid dinner, malonic acid, alkylmalonic acids, alkenyl malonic acids) with a variety of alcohols (e.g., butyl alcohol, hexyl alcohol, dodecyl alcohol, 2-ethylhexyl alcohol, ethylene glycol, diethylene glycol monoether, propylene glycol).
- dicarboxylic acids e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebasic acid, fumaric acid, adipic acid, linoleic
- esters includes dibutyl adipate, di(2-ethylhexyl) sebacate, di-n-hexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, didecyl phthalate, dieicosyl sebacate, the 2-ethylhexyl diester of linoleic acid dimer, and the complex ester formed by reacting one mole of sebacic acid with two moles of tetraethylene glycol and two moles of 2-ethylhexanoic acid.
- Esters useful as synthetic oils also include those made from C 5 to C ]2 monocarboxylic acids and polyols and polyol esters such as neopentyl glycol, trimethylolpropane, pentaerythritol, dipentaerythritol and tripentaerythritol.
- Silicon-based oils such as the polyalkyl-, polyaryl-, polyalkoxy- or polyaryloxysilicone oils and silicate oils comprise another useful class of synthetic lubricants; such oils include tetraethyl silicate, tetraisopropyl silicate, tetra-(2-ethylhexyl)silicate, tetra- (4-methyl-2-ethylhexyl)silicate, tetra-(p-tert-butyl-phenyl) silicate, hexa-(4-methyl-2- ethylhexyl)disiloxane, poly(methyl)siloxanes and poly(methylphenyl)siloxanes.
- oils include tetraethyl silicate, tetraisopropyl silicate, tetra-(2-ethylhexyl)silicate, tetra- (4-methyl-2-ethylhexyl
- Other synthetic lubricating oils include liquid esters of phosphorous-containing acids (e.g., tricresyl phosphate, trioctyl phosphate, diethyl ester of decylphosphonic acid) and polymeric tetrahydrofurans.
- Unrefined, refined and re-refined oils can be used in lubricants of the present invention.
- Unrefined oils are those obtained directly from a natural or synthetic source without further purification treatment.
- a shale oil obtained directly from retorting operations; petroleum oil obtained directly from distillation; or ester oil obtained directly from an esterification and used without further treatment would be an unrefined oil.
- Refined oils are similar to unrefined oils except that the oil is further treated in one or more purification steps to improve one or more properties. Many such purification techniques, such as distillation, solvent extraction, acid or base extraction, filtration and percolation are known to those skilled in the art.
- Re-refined oils are obtained by processes similar to those used to provide refined oils but begin with oil that has already been used in service. Such re -refined oils are also known as reclaimed or reprocessed oils and are often subjected to additional processing using techniques for removing spent additives and oil breakdown products.
- Definitions for the base stocks and base oils in this invention are the same as those found in the American Petroleum Institute (API) publication "Engine Oil Licensing and Certification System", Industry Services Department, Fourteenth Edition, December 1996, Addendum 1, December 1998. Said publication categorizes base stocks as follows:
- Group I base stocks contain less than 90 percent saturates and/or greater than 0.03 percent sulphur and have a viscosity index greater than or equal to 80 and less than 120 using the test methods specified in Table E-I.
- Group II base stocks contain greater than or equal to 90 percent saturates and less than or equal to 0.03 percent sulphur and have a viscosity index greater than or equal to 80 and less than 120 using the test methods specified in Table E-I.
- Group III base stocks contain greater than or equal to 90 percent saturates and less than or equal to 0.03 percent sulphur and have a viscosity index greater than or equal to 120 using the test methods specified in Table E-I.
- Group IV base stocks are polyalphaolefins (PAO).
- Group V base stocks include all other base stocks not included in Group I, II, III, or IV.
- the oil of lubricating viscosity in this invention contains 50 mass % or more of a Group II basestock. Preferably, it contains 60, such as 70, 80 or 90, mass % or more of a Group II basestock.
- the oil of lubricating viscosity may be substantially all Group II basestock.
- a metal detergent is an additive based on so-called metal "soaps", that is metal salts of acidic organic compounds, sometimes referred to as surfactants. They generally comprise a polar head with a long hydrophobic tail.
- Overbased metal detergents which comprise neutralized metal detergents as the outer layer of a metal base (e.g. carbonate) micelle, may be provided by including large amounts of metal base by reacting an excess of a metal base, such as an oxide or hydroxide, with an acidic gas such as carbon dioxide.
- overbased metal detergents (A) are overbased metal hydrocarbyl-substituted hydroxybenzoate, preferably hydrocarbyl-substituted salicylate, detergents.
- Hydrocarbyl means a group or radical that contains carbon and hydrogen atoms and that is bonded to the remainder of the molecule via a carbon atom. It may contain hetero atoms, i.e. atoms other than carbon and hydrogen, provided they do not alter the essentially hydrocarbon nature and characteristics of the group.
- hydrocarbyl there may be mentioned alkyl and alkenyl.
- the overbased metal hydrocarbyl-substituted hydroxybenzoate typically has the structure shown:
- R is a linear or branched aliphatic hydrocarbyl group, and more preferably an alkyl group, including straight- or branched-chain alkyl groups. There may be more than one R group attached to the benzene ring.
- M is an alkali metal (e.g. lithium, sodium or potassium) or alkaline earth metal (e.g. calcium, magnesium barium or strontium). Calcium or magnesium is preferred; calcium is especially preferred.
- the COOM group can be in the ortho, meta or para position with respect to the hydroxyl group; the ortho position is preferred.
- the R group can be in the ortho, meta or para position with respect to the hydroxyl group.
- Hydroxybenzoic acids are typically prepared by the carboxylation, by the Kolbe- Schmitt process, of phenoxides, and in that case, will generally be obtained (normally in a diluent) in admixture with uncarboxylated phenol. Hydroxybenzoic acids may be non- sulphurized or sulphurized, and may be chemically modified and/or contain additional substituents. Processes for sulphurizing a hydrocarbyl -substituted hydroxybenzoic acid are well known to those skilled in the art, and are described, for example, in US 2007/0027057.
- the hydrocarbyl group is preferably alkyl (including straight- or branched-chain alkyl groups), and the alkyl groups advantageously contain 5 to 100, preferably 9 to 30, especially 14 to 24, carbon atoms.
- overbased is generally used to describe metal detergents in which the ratio of the number of equivalents of the metal moiety to the number of equivalents of the acid moiety is greater than one.
- 'low-based' is used to describe metal detergents in which the equivalent ratio of metal moiety to acid moiety is greater than 1, and up to about 2.
- an “overbased calcium salt of surfactants” is meant an overbased detergent in which the metal cations of the oil-insoluble metal salt are essentially calcium cations. Small amounts of other cations may be present in the oil-insoluble metal salt, but typically at least 80, more typically at least 90, for example at least 95, mole %, of the cations in the oil- insoluble metal salt, are calcium ions. Cations other than calcium may be derived, for example, from the use in the manufacture of the overbased detergent of a surfactant salt in which the cation is a metal other than calcium.
- the metal salt of the surfactant is also calcium.
- Carbonated overbased metal detergents typically comprise amorphous nanoparticles. Additionally, there are disclosures of nanoparticulate materials comprising carbonate in the crystalline calcite and vaterite forms.
- the basicity of the detergents may be expressed as a total base number (TBN).
- TBN total base number is the amount of acid needed to neutralize all of the basicity of the overbased material.
- the TBN may be measured using ASTM standard D2896 or an equivalent procedure.
- the detergent may have a low TBN (i.e. a TBN of less than 50), a medium TBN (i.e. a TBN of 50 to 150) or a high TBN (i.e. a TBN of greater than 150, such as 150-500).
- Basicity Index and Degree of Carbonation may be used.
- Basicity Index is the molar ratio of total base to total soap in the overbased detergent.
- Degree of Carbonation is the percentage of carbonate present in the overbased detergent expressed as a mole percentage relative to the total excess base in the detergent.
- Overbased metal hydrocarbyl-substituted hydroxybenzoates can be prepared by any of the techniques employed in the art.
- a general method is as follows:
- Overbased metal hydrocarbyl-substituted hydroxybenzoates can be made by either a batch or a continuous overbasing process.
- Metal base e.g. metal hydroxide, metal oxide or metal alkoxide
- lime calcium hydroxide
- the charges may be equal or may differ, as may the carbon dioxide charges which follow them.
- the carbon dioxide treatment of the previous stage need not be complete.
- dissolved hydroxide is converted into colloidal carbonate particles dispersed in the mixture of volatile hydrocarbon solvent and non-volatile hydrocarbon oil.
- Carbonation may by effected in one or more stages over a range of temperatures up to the reflux temperature of the alcohol promoters. Addition temperatures may be similar, or different, or may vary during each addition stage. Phases in which temperatures are raised, and optionally then reduced, may precede further carbonation steps.
- the volatile hydrocarbon solvent of the reaction mixture is preferably a normally liquid aromatic hydrocarbon having a boiling point not greater than about 150°C. Aromatic hydrocarbons have been found to offer certain benefits, e.g. improved filtration rates, and examples of suitable solvents are toluene, xylene, and ethyl benzene.
- the alkanol is preferably methanol although other alcohols such as ethanol can be used. Correct choice of the ratio of alkanol to hydrocarbon solvents, and the water content of the initial reaction mixture, are important to obtain the desired product.
- Oil may be added to the reaction mixture; if so, suitable oils include hydrocarbon oils, particu llaarrllyy tthhoossee of mineral origin. Oils which have viscosities of 15 to 30 mm 2 /sec at 38 0 C are very suitable.
- the reaction mixture is typically heated to an elevated temperature, e.g. above 130°C, to remove volatile materials (water and any remaining alkanol and hydrocarbon solvent).
- an elevated temperature e.g. above 130°C
- the raw product is hazy as a result of the presence of suspended sediments. It is clarified by, for example, filtration or centrifugation. These measures may be used before, or at an intermediate point, or after solvent removal.
- the products are generally used as an oil solution. If the reaction mixture contains insufficient oil to retain an oil solution after removal of the volatiles, further oil should be added. This may occur before, or at an intermediate point, or after solvent removal.
- (A) may have:
- the acid, anhydride, ester or amide thereof constitutes at least 1 mass % of the lubricating oil composition. Preferably it constitutes from 1.5 such as up to 10, such as 2 to 10, for example 3 to 6, mass %.
- (B) may be a mixture.
- the acid may be mono or polycarboxylic, preferably dicarboxylic, acid.
- the hydrocarbyl group preferably has from 8 to 400, such as 8 to 100, carbon atoms.
- an anhydride of a dicarboxylic acid is preferred.
- Esters may be half or diesters when the acid is a dicarboxylic acid.
- Ester groups may include alkyl, aryl, or aralkyl, and amide groups may be unsubstituted or carry one or more alkyl, aryl or aralkyl groups.
- R 1 represents a C 8 to Cioo branched or linear hydrocarbyl, such as a polyalkenyl, alkyl or alkaryl group;
- X and Y each independently represents OR 2 and OR 3 , where each R 2 and R 3 independently represents a hydrogen atom, or an alkyl, aryl or aralkyl group, or X and Y together represent -O-; and/or depicted as
- R 4 represents OR 5 or NR 6 R 7 , where each R 5 , R 6 and R 7 independently represents a hydrogen atom or an alkyl group.
- the hydrocarbyl group is a polyalkenyl group.
- Such polyalkenyl moiety may have a number average molecular weight of from 200 to 3000, preferably from 350 to 950.
- Suitable hydrocarbons or polymers employed in the formation of the acid/derivative of the present invention include homopolymers, interpolymers or lower molecular weight hydrocarbons.
- such polymers comprise interpolymers of ethylene and at least one alpha-olefin of the above formula, wherein R 1 is alkyl of from 1 to 18 carbon atoms, and more preferably is alkyl of from 1 to 8 carbon atoms, and more preferably still of from 1 to 2 carbon atoms.
- useful alpha-olefin monomers and comonomers include, for example, propylene, butene-1, hexene-1, octene-1, 4-methylpentene-l, decene-1, dodecene-1, tridecene-1, tetradecene-1, pentadecene-1, hexadecene-1, heptadecene-1, octadecene-1, nonadecene-1, and mixtures thereof (e.g., mixtures of propylene and butene-1, and the like).
- Exemplary of such polymers are propylene homopolymers, butene-1 homopolymers, ethylene-propylene copolymers, ethylene-butene-1 copolymers, propylene-butene copolymers and the like, wherein the polymer contains at least some terminal and/or internal unsaturation.
- Preferred polymers are unsaturated copolymers of ethylene and propylene and ethylene and butene-1.
- the interpolymers of this invention may contain a minor amount, e.g. 0.5 to 5 mole % of a C 4 to Ci 8 non-conjugated diolefin comonomer.
- the polymers of this invention comprise only alpha-olefin homopolymers, interpolymers of alpha-olefin comonomers and interpolymers of ethylene and alpha-olefin comonomers.
- the molar ethylene content of the polymers employed in this invention is preferably in the range of 0 to 80 %, and more preferably 0 to 60 %.
- the ethylene content of such copolymers is most preferably between 15 and 50 %, although higher or lower ethylene contents may be present.
- These polymers may be prepared by polymerizing alpha-olefin monomer, or mixtures of alpha-olefin monomers, or mixtures comprising ethylene and at least one C 3 to C 28 alpha- olefin monomer, in the presence of a catalyst system comprising at least one metallocene (e.g., a cyclopentadienyl-transition metal compound) and an alumoxane compound.
- a catalyst system comprising at least one metallocene (e.g., a cyclopentadienyl-transition metal compound) and an alumoxane compound.
- the percentage of polymer chains exhibiting terminal ethenylidene unsaturation may be determined by FTIR spectroscopic analysis, titration, or C 13 NMR.
- the chain length of the R 1 alkyl group will vary depending on the comonomer(s) selected for use in the polymerization.
- terminally unsaturated interpolymers may be prepared by known metallocene chemistry and may also be prepared as described in U.S. Patent Nos. 5,498,809; 5,663,130; 5,705,577; 5,814,715; 6,022,929 and 6,030,930.
- polymers prepared by cationic polymerization of isobutene, styrene, and the like are polymers prepared by cationic polymerization of isobutene, styrene, and the like.
- Common polymers from this class include polyisobutenes obtained by polymerization of a C 4 refinery stream having a butene content of about 35 to about 75 mass %, and an isobutene content of about 30 to about 60 mass %, in the presence of a Lewis acid catalyst, such as aluminum trichloride or boron trifluoride.
- a preferred source of monomer for making poly-n-butenes is petroleum feedstreams such as Raffinate II. These feedstocks are disclosed in the art such as in U.S. Patent No. 4,952,739.
- Polyisobutylene is a most preferred backbone of the present invention because it is readily available by cationic polymerization from butene streams (e.g., using AlCl 3 or BF 3 catalysts). Such polyisobutylenes generally contain residual unsaturation in amounts of about one ethylenic double bond per polymer chain, positioned along the chain.
- a preferred embodiment utilizes poiyisobutyiene prepared from a pure isobutyiene stream or a Raffinate I stream to prepare reactive isobutyiene polymers with terminal vinylidene olefins.
- these polymers referred to as highly reactive polyisobutylene (HR-PIB)
- HR-PIB highly reactive polyisobutylene
- HR-PIB has a terminal vinylidene content of at least 65%, e.g., 70%, more preferably at least 80%, most preferably, at least 85%.
- the preparation of such polymers is described, for example, in U.S. Patent No. 4,152,499.
- HR- PIB is known and HR-PIB is commercially available under the tradenames GlissopalTM (from BASF) and UltravisTM (from BP-Amoco).
- Polyisobutylene polymers that may be employed are generally based on a hydrocarbon chain of from 400 to 3000. Methods for making polyisobutylene are known. Polyisobutylene can be functionalized by halogenation (e.g. chlorination), the thermal "ene” reaction, or by free radical grafting using a catalyst (e.g. peroxide), as described
- the hydrocarbon or polymer backbone may be functionalized, with carboxylic acid producing moieties (acid or anhydride moieties) selectively at sites of carbon- to-carbon unsaturation on the polymer or hydrocarbon chains, or randomly along chains using any of the three processes mentioned above or combinations thereof, in any sequence.
- the polymer or hydrocarbon may be functionalized, with carboxylic acid producing moieties (acid or anhydride) by reacting the polymer or hydrocarbon under conditions that result in the addition of functional moieties or agents, i.e., acid, anhydride, ester moieties, etc., onto the polymer or hydrocarbon chains primarily at sites of carbon-to-carbon unsaturation (also referred to as ethylenic or olefinic unsaturation) using the halogen assisted functionalization (e.g. chlorination) process or the thermal "ene" reaction.
- carboxylic acid producing moieties i.e., acid, anhydride, ester moieties, etc.
- Selective functionalization can be accomplished by halogenating, e.g., chlorinating or brominating the unsaturated ⁇ -olefin polymer to about 1 to 8 mass %, preferably 3 to 7 mass % chlorine, or bromine, based on the weight of polymer or hydrocarbon, by passing the chlorine or bromine through the polymer at a temperature of 60 to 250 0 C, preferably 110 to 160 0 C, e.g., 120 l ⁇ 140 0 C, for about 0.5 to 10, preferably 1 to 7 hours.
- halogenating e.g., chlorinating or brominating the unsaturated ⁇ -olefin polymer to about 1 to 8 mass %, preferably 3 to 7 mass % chlorine, or bromine, based on the weight of polymer or hydrocarbon, by passing the chlorine or bromine through the polymer at a temperature of 60 to 250 0 C, preferably 110 to 160 0 C, e.g., 120 l ⁇ 140 0 C, for about 0.5 to 10,
- the haiogenated polymer or hydrocarbon (hereinafter backbone) is then reacted with sufficient monounsaturated reactant capable of adding the required number of functional moieties to the backbone, e.g., monounsaturated carboxylic reactant, at 100 to 250 0 C, usually about 180 0 C to 235°C, for about 0.5 to 10, e.g., 3 to 8 hours, such that the product obtained will contain the desired number of moles of the monounsaturated carboxylic reactant per mole of the haiogenated backbones.
- the backbone and the monounsaturated carboxylic reactant are mixed and heated while adding chlorine to the hot material.
- chlorination normally helps increase the reactivity of starting olefin polymers with monounsaturated functionalizing reactant, it is not necessary with some of the polymers or hydrocarbons contemplated for use in the present invention, particularly those preferred polymers or hydrocarbons which possess a high terminal bond content and reactivity.
- the backbone and the monounsaturated functionality reactant e.g., carboxylic reactant, are contacted at elevated temperature to cause an initial thermal "ene" reaction to take place. Ene reactions are known.
- the hydrocarbon or polymer backbone can be functionalized by random attachment of functional moieties along the polymer chains by a variety of methods.
- the polymer in solution or in solid form, may be grafted with the monounsaturated carboxylic reactant, as described above, in the presence of a free-radical initiator.
- the grafting takes place at an elevated temperature in the range of about 100 to 260°C, preferably 120 to 24O 0 C.
- free-radical initiated grafting would be accomplished in a mineral lubricating oil solution containing, e.g., 1 to 50 mass %, preferably 5 to 30 mass % polymer based on the initial total oil solution.
- the free-radical initiators that may be used are peroxides, hydroperoxides, and azo compounds, preferably those that have a boiling point greater than about 100°C and decompose thermally within the grafting temperature range to provide free-radicals.
- Representative of these free-radical initiators are azobutyronitrile, 2,5-dimethylhex-3-ene-2, 5-bis-tertiary-butyl peroxide and dicumene peroxide.
- the initiator when used, typically is used in an amount of between 0.005% and 1% by weight based on the weight of the reaction mixture solution.
- the aforesaid monounsaturated carboxylic reactant material and free-radical initiator are used in a weight ratio range of from about 1.0:1 to 30:1, preferably 3: 1 to 6: 1.
- the grafting is preferably carried out in an inert atmosphere, such as under nitrogen blanketing.
- the resulting grafted polymer is characterized by having carboxylic acid (or derivative) moieties randomly attached along the polymer chains: it being understood, of course, that some of the polymer chains remain ungrafted.
- the free radical grafting described above can be used for the other polymers and hydrocarbons of the present invention.
- Mixtures of monounsaturated carboxylic materials (i) - (iv) also may be used.
- the monounsaturation of the monounsaturated carboxylic reactant becomes saturated.
- maleic anhydride becomes backbone-substituted succinic anhydride
- acrylic acid becomes backbone-substituted propionic acid.
- Such monounsaturated carboxylic reactants are fumaric acid, itaconic acid, maleic acid, maleic anhydride, chloromaleic acid, chloromaleic anhydride, acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, and lower alkyl (e.g., Ci to C 4 alkyl) acid esters of the foregoing, e.g., methyl maleate, ethyl fumarate, and methyl fumarate.
- lower alkyl e.g., Ci to C 4 alkyl
- the monounsaturated carboxylic reactant typically will be used in an amount ranging from about equimolar amount to about 100 mass % excess, preferably 5 to 50 mass % excess, based on the moles of polymer or hydrocarbon. Unreacted excess monounsaturated carboxylic reactant can be removed from the final dispersant product by, for example, stripping, usually under vacuum, if required.
- the treat rate of additives (A) and (B) contained in the lubricating oil composition may for example be in the range of 1 to 2.5, preferably 2 to 20, more preferably 5 to 18, mass
- the lubricating oil composition of the invention may comprise further additives, different from and additional to (A) and (B).
- additional additives may, for example include ashless dispersants, other metal detergents, anti-wear agents such as zinc dihydrocarbyl dithiophosphates, anti-oxidants and demulsifiers.
- It may be desirable, although not essential, to prepare one or more additive packages or concentrates comprising the additives, whereby additives (A) and (B) can be added simultaneously to the base oil to form the lubricating oil composition. Dissolution of the additive package(s) into the lubricating oil may be facilitated by solvents and by mixing accompanied with mild heating, but this is not essential.
- additive package(s) will typically be formulated to contain the additive(s) in proper amounts to provide the desired concentration, and/or to carry out the intended function in the final formulation when the additive package(s) is/are combined with a predetermined amount of base lubricant.
- additives (A) and (B), in accordance with the present invention may be admixed with small amounts of base oil or other compatible solvents together with other desirable additives to form additive packages containing active ingredients in an amount, based on the additive package, of, for example, from 2.5 to 90, preferably from 5 to 75, most preferably from 8 to 60, mass % of additives in the appropriate proportions, the remainder being base oil.
- the final formulations as a trunk piston engine oil may typically contain 30, preferably 10 to 28, more preferably 12 to 24, mass % of the additive package(s), the remainder being base oil.
- the trunk piston engine oil has a compositional TBN (using ASTM D2896) of 20 to 60, such as 25 to 55.
- Base oil I an API Group I base oil known as XOMAPE600
- Base oil II an API Group II base oil known as CHEV600R
- HFO a heavy fuel oil
- ISO-F-RMK 380 Phenate a calcium phenate detergent having a TBN of 255
- Sulfonate a calcium sulfonate detergent having a TBN of 425
- the Panel Coker test was used to evaluate the performance of test lubricants.
- the test method involved splashing the oil under test onto a heated metal plate by spinning a metal comb-like device within a sump containing the oil. At the end of the test period, deposits formed may be assessed by weight and by visual inspection of the plate's appearance.
- the testing was performed using a panel coker tester, model PK-S, supplied by the Yoshida Kagaku Kikai Co., of Osaka, Japan. Test panels were thoroughly cleaned and then weighed before inserting them into the apparatus. The test oil was mixed with 2.5% HFO and 225g of the resulting mixture added to the sump of the apparatus. When the temperature of the oil was at 100°C and the test plate at 32O 0 C, a metal comb device was automatically rotated causing the oil to be splashed onto the test plate.
- test sequence lasted for 120 cycles, each cycle consisting of 15 seconds in which the oil was splashed onto the plate and 45 seconds without splashing.
- Test lubricants were also evaluated for asphaltene dispersancy using light scattering according to the Focused Beam Reflectance Method ("FBRM”), which predicts asphaltene agglomeration and hence 'black sludge' formation.
- FBRM Focused Beam Reflectance Method
- the FBRM test method was disclosed at the 7 th International Symposium on Marine Engineering, Tokyo, 24 th - 28 th October 2005, and was published in 'The Benefits of Salicylate Detergents in TPEO Applications with a Variety of Base Stocks', in the Conference Proceedings. Further details were disclosed at the CIMAC Congress, Vienna, 21 st -24 th May 2007 and published in "Meeting the Challenge of New Base Fluids for the Lubrication of Medium Speed Marine Engines - An Additive Approach" in the Congress Proceedings.
- the FBRM probe contains fibre optic cables through which laser light travels to reach the probe tip. At the tip, an optic focuses the laser light to a small spot. The optic is rotated so that the focussed beam scans a circular path between the window of the probe and the sample. As particles flow past the window they intersect the scanning path, giving backscattered light from the individual particles.
- the scanning laser beam travels much faster than the particles; this means that the particles are effectively stationary. As the focussed beam reaches one edge of the particle there is an increase in the amount of backscattered light; the amount will decrease when the focussed beam reaches the other edge of the particle.
- the instrument measures the time of the increased backscatter.
- the time period of backscatter from one particle is multiplied by the scan speed and the result is a distance or chord length.
- a chord length is a straight line between any two points on the edge of a particle. This is represented as a chord length distribution, a graph of numbers of chord lengths (particles) measured as a function of the chord length dimensions in microns.
- FBRM typically measures tens of thousands of chords per second, resulting in a robust number-by-chord length distribution. The method gives an absolute measure of the particle size distribution of the asphaltene particles.
- the Focused beam Reflectance Probe (FBRM), model Lasentec D600L, was supplied by Mettler Toledo, Leicester, UK. The instrument was used in a configuration to give a particle size resolution of 1 ⁇ m to lmm. Data from FBRM can be presented in several ways. Studies have suggested that the average counts per second can be used as a quantitative determination of asphaltene dispersancy. This value is a function of both the average size and level of agglomerate. In this application, the average count rate (over the entire size range) was monitored using a measurement time of 1 second per sample.
- test lubricant formulations were heated to 60°C and stirred at 400rpm; when the temperature reached 6O 0 C the FBRM probe was inserted into the sample and measurements made for 15 minutes.
- An aliquot of heavy fuel oil (10% w/w) was introduced into the lubricant formulation under stirring using a four blade stirrer (at 400 rpm). A value for the average counts per second was taken when the count rate had reached an equilibrium value (typically overnight).
- each lubricant contained 44.6 mM of soap and had a TBN of 30. Also, each lubricant contained 0.5 mass % HFO.
- Example 1 gave rise to much lower deposits, i.e. improved asphaltene dispersency, than a corresponding example lacking PIBSA (Ex X) and also than an example in a Group I base oil lacking PIBSA (Ex Y).
- Each lubricant contained 42 mM of soap and had a TBN of 30. Also, each lubricant contained 0.5 mass % HFO.
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Abstract
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Priority Applications (8)
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EP10711851.5A EP2417233B1 (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
AU2010234300A AU2010234300B2 (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
CN2010800154936A CN102365353A (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
CA2755815A CA2755815C (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
ES10711851T ES2428237T3 (en) | 2009-04-07 | 2010-03-31 | Marine Engine Lubrication |
US13/262,932 US20120028521A1 (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
JP2012503915A JP5698729B2 (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
SG2011073236A SG175117A1 (en) | 2009-04-07 | 2010-03-31 | Marine engine lubrication |
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Also Published As
Publication number | Publication date |
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EP2417233A1 (en) | 2012-02-15 |
EP2417234B1 (en) | 2013-06-05 |
CA2755815C (en) | 2015-03-17 |
CN102365353A (en) | 2012-02-29 |
EP2417234A1 (en) | 2012-02-15 |
AU2010234300A1 (en) | 2011-10-27 |
WO2010115595A9 (en) | 2011-08-04 |
AU2010234300B2 (en) | 2014-04-24 |
KR101654397B1 (en) | 2016-09-05 |
AU2010234299B2 (en) | 2014-04-24 |
US20120028521A1 (en) | 2012-02-02 |
KR20120027208A (en) | 2012-03-21 |
JP2012522878A (en) | 2012-09-27 |
WO2010115594A9 (en) | 2011-08-04 |
ES2425957T3 (en) | 2013-10-18 |
ES2428237T3 (en) | 2013-11-06 |
SG175117A1 (en) | 2011-11-28 |
CA2755308C (en) | 2013-09-24 |
CA2755308A1 (en) | 2010-10-14 |
US20120028522A1 (en) | 2012-02-02 |
SG174925A1 (en) | 2011-11-28 |
JP2012522879A (en) | 2012-09-27 |
CA2755815A1 (en) | 2010-10-14 |
JP5698729B2 (en) | 2015-04-08 |
EP2417233B1 (en) | 2013-06-26 |
KR20120006995A (en) | 2012-01-19 |
WO2010115594A1 (en) | 2010-10-14 |
CN102365352A (en) | 2012-02-29 |
CN104277894A (en) | 2015-01-14 |
JP5698728B2 (en) | 2015-04-08 |
AU2010234299A1 (en) | 2011-10-27 |
KR101662350B1 (en) | 2016-10-04 |
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