WO2016071519A1 - Compositions d'huiles lubrifiantes pour cylindres de moteurs diesel marins - Google Patents

Compositions d'huiles lubrifiantes pour cylindres de moteurs diesel marins Download PDF

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Publication number
WO2016071519A1
WO2016071519A1 PCT/EP2015/075989 EP2015075989W WO2016071519A1 WO 2016071519 A1 WO2016071519 A1 WO 2016071519A1 EP 2015075989 W EP2015075989 W EP 2015075989W WO 2016071519 A1 WO2016071519 A1 WO 2016071519A1
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Prior art keywords
lubricating oil
marine diesel
diesel cylinder
alkyl
oil composition
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PCT/EP2015/075989
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English (en)
Inventor
Cornelis Hendrikus Maria Boons
Original Assignee
Chevron Oronite Technology B.V.
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Application filed by Chevron Oronite Technology B.V. filed Critical Chevron Oronite Technology B.V.
Priority to SG11201703710TA priority Critical patent/SG11201703710TA/en
Priority to EP15790599.3A priority patent/EP3215592A1/fr
Priority to CN201580060216.XA priority patent/CN107109288A/zh
Priority to KR1020177013779A priority patent/KR20170078706A/ko
Priority to JP2017524034A priority patent/JP2017533329A/ja
Publication of WO2016071519A1 publication Critical patent/WO2016071519A1/fr

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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
    • 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
    • C10M141/08—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 sulfur-, selenium- or tellurium-containing 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
    • 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
    • C10M169/042—Mixtures of base-materials and additives the additives being compounds of unknown or incompletely defined constitution only
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/26—Overbased carboxylic acid salts
    • 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
    • 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
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid salts
    • 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
    • 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
    • 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
    • C10N2030/08—Resistance to extreme temperature
    • 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
    • C10N2030/52—Base number [TBN]
    • 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

  • the present invention generally relates to a marine diesel cylinder lubricating oil composition, in particular, for lubricating a marine two-stroke crosshead diesel cylinder engine.
  • Diesel engines may generally be classified as low-speed, medium-speed, or high-speed engines, with the low-speed variety being used for the largest, deep shaft marine vessels and certain other industrial applications.
  • Low-speed diesel engines are unique in size and method of operation. The engines themselves are massive, the larger units may approach 200 tons in weight and an upward of 10 feet in length and 45 feet in height.
  • the output of these engines can reach as high as 100,000 brake horsepower with engine revolutions of 60 to about 200 revolutions per minute. They are typically of crosshead design and operate on the two-stroke cycle. These engines typically operate on residual fuels, but some may also operate on distillate fuels that contain little or no residue.
  • Medium-speed engines typically operate in the range of about 250 to about 1 100 rpm and may operate on either the four-stroke or the two-stroke cycle.
  • These engines can be of trunk piston design or occasionally of crosshead design. They typically operate on residual fuels, just like the low-speed diesel engines, but some may also operate on distillate fuels that contain little or no residue.
  • these engines can also be used for propulsion, ancillary applications or both on deep-sea vessels.
  • Low- and medium-speed diesel engines are also extensively used in power plant operations.
  • a low- or medium-speed diesel engine that operates on the two-stroke cycle is typically a direct-coupled and direct-reversing engine of crosshead construction, with a diaphragm and one or more stuffing boxes separating the power cylinders from the crankcase to prevent combustion products from entering the crankcase and mixing with the crankcase oil.
  • the notable complete separation of the crankcase from the combustion zone has led persons skilled in the art to lubricate the combustion chamber and the crankcase with different lubricating oils.
  • the cylinders are lubricated separately from the other engine components.
  • the cylinders are lubricated on a total loss basis with the cylinder oil being injected separately to quills on each cylinder by means of lubricators positioned around the cylinder liner. Oil is distributed to the lubricators by means of pumps, which are, in modern engine designs, actuated to apply the oil directly onto the rings to reduce wastage of the oil.
  • a primary function of marine diesel cylinder lubricants is to neutralize sulfur-based acidic components of high-sulfur fuel oil combusted in low-speed 2-stroke crosshead diesel engines.
  • This neutralization is accomplished by the inclusion in the marine diesel cylinder lubricant of basic species such as metallic detergents.
  • basic species such as metallic detergents.
  • the basicity of the marine diesel cylinder lubricant can be diminished by oxidation of the marine diesel cylinder lubricant (caused by the thermal and oxidative stress the lubricant undergoes in the engine), thus decreasing the lubricant's neutralization ability.
  • the oxidation can be accelerated if the marine diesel cylinder lubricants contain oxidation catalysts such as wear metals that are generally known to be present in the lubricant during engine operation.
  • Marine two-stroke diesel cylinder lubricants must meet performance demands in order to comply with the severe operating conditions required for more modern larger bore, two-stroke cross-head diesel marine engines which are run at high outputs and severe loads and higher temperatures of the cylinder liner. Therefore, there is a need for marine diesel cylinder lubricating oil compositions having improved detergency and high heat stability at high temperatures.
  • Cylinder lubricant basicity, cylinder lubricant feed rate of the oil to the cylinder liner, engine make and type, engine load, inlet air humidity and fuel sulfur content are among the factors that can influence the amount of cold corrosion.
  • High alkaline lubricants are used to neutralize the sulfuric acids and avoid cold corrosion of piston rings and cylinder liner surfaces.
  • High alkalinity lubricants e.g., up to 100 BN by the ASTM D2896 test method) are currently being marketed to help overcome severe cold corrosion.
  • Sulfurized, overbased phenates are known compounds which are widely used in marine applications for their detergency properties and thermal stability.
  • low molecular weight alkylphenol compounds such as tetrapropenyl phenol (TPP) are often used as raw materials in the manufacture of these sulfurized, overbased phenates.
  • TPP tetrapropenyl phenol
  • the process to manufacture overbased phenates generally results in the presence of the unreacted alkylphenol in the final reaction product and ultimately in the finished lubricating oil composition.
  • Recent reproductive toxicity studies have shown that in high concentrations of unreacted alkylphenol, TPP in particular, may be endocrine disruptive materials which can cause adverse effects in male and female reproductive organs.
  • a marine diesel cylinder lubricating oil composition which comprises (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a total base number (TBN) of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of tetrapropenyl phenol (TPP) and its unsulfurized metal salt.
  • TBN total base number
  • TPP tetrapropenyl phenol
  • a method for lubricating a marine two-stroke crosshead diesel engine with a marine diesel cylinder lubricant composition having improved high temperature detergency and thermal stability comprising operating the engine with a marine diesel cylinder lubricating oil composition comprising (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydro xyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially
  • a third embodiment of the present invention is directed to a use of a marine diesel cylinder lubricating oil composition
  • a marine diesel cylinder lubricating oil composition comprising (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of TPP and its unsulfurized metal salt, to improve high temperature detergency and thermal stability in a two -stroke crosshead marine diesel engine.
  • the present invention is based on the surprising discovery that the combination of one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and one or more high overbased alkyl aromatic sulfonic acids or salts thereof advantageously improves the high temperature detergency and thermal stability of a marine diesel cylinder lubricating oil composition containing a major amount of one or more Group I basestocks and used in a two-stroke crosshead marine diesel engine; wherein the marine diesel cylinder lubricant has a TBN of from about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of tetrapropenyl phenol (TPP) and its unsulfurized metal salt.
  • TPP tetrapropenyl phenol
  • the combination of one or more alkaline earth metal salts of an alkyl-substituted hydroxy aromatic carboxylic acid having a TBN of greater than 250, and one or more high overbased alkyl aromatic sulfonic acids or salts thereof also advantageously improves the storage stability of a marine diesel cylinder lubricating oil composition containing a major amount of one or more Group I basestocks, and having a TBN of from about 5 to about 120, and is substantially free of TPP and its unsulfurized metal salt.
  • marine diesel cylinder lubricant or "marine diesel cylinder lubricating oil” as used herein shall be understood to mean a lubricant used in the cylinder lubrication of a low speed or medium speed two-stroke crosshead marine diesel engine.
  • the marine diesel cylinder lubricant is fed to the cylinder walls through a number of injection points.
  • Marine diesel cylinder lubricants are capable of providing a film between the cylinder liner and the piston rings and holding partially burned fuel residues in suspension, to thereby promote engine cleanliness and neutralize acids formed by, for example, the combustion of sulfur compounds in the fuel.
  • a “marine residual fuel” refers to a material combustible in large marine engines which has a carbon residue, as defined in International Organization for Standardization (ISO) 10370) of at least 2.5 wt. % (e.g., at least 5 wt. %, or at least 8 wt. %) (relative to the total weight of the fuel), a viscosity at 50°C of greater than 14.0 cSt, such as the marine residual fuels defined in the International Organization for Standardization specification ISO 8217:2005, "Petroleum products - Fuels (class F) - Specifications of marine fuels," the contents of which are incorporated herein in their entirety.
  • ISO International Organization for Standardization
  • a “residual fuel” refers to a fuel meeting the specification of a residual marine fuel as set forth in the ISO 8217:2010 international standard.
  • a “low sulfur marine fuel” refers to a fuel meeting the specification of a residual marine fuel as set forth in the ISO 8217:2010 specification that, in addition, has about 1.5 wt. % or less, or even about 0.5% wt.% or less, of sulfur, relative to the total weight of the fuel.
  • a “distillate fuel” refers to a fuel meeting the specification of a distillate marine fuel as set forth in the ISO 8217:2010 international standard.
  • a “low sulfur distillate fuel” refers to a fuel meeting the specification of a distillate marine fuel set forth in the ISO 8217:2010 international standard that, in addition, has about 0.1 wt. % or less or even about 0.005 wt.% or less, of sulfur, relative to the total weight of the fuel.
  • Group II metal or "alkaline earth metal” means calcium, barium, magnesium, and strontium.
  • calcium base refers to a calcium hydroxide, calcium oxide, calcium alkoxide and the like and mixtures thereof.
  • alkylphenol refers to a phenol group having one or more alkyl substituents at least one of which has a sufficient number of carbon atoms to impart oil solubility to the resulting phenate additive.
  • phenate means a salt of a phenol.
  • lower alkanoic acid refers to alkanoic acids having 1 through 3 carbon atoms, i.e., formic acid, acetic acid and propionic acid and mixtures thereof.
  • polyol promoter refers to a compound having two or more hydroxy substituents, generally the sorbitol type, for example, alkylene glycols and also derivatives thereof and functional equivalents such as polyol ethers and hydro xycarboxylic acids.
  • Total Base Number refers to the level of alkalinity in an oil sample, which indicates the ability of the composition to continue to neutralize corrosive acids, in accordance with ASTM Standard No. D2896 or equivalent procedure.
  • the test measures the change in electrical conductivity, and the results are expressed as mgKOH/g (the equivalent number of milligrams of KOH needed to neutralize 1 gram of a product). Therefore, a high TBN reflects strongly overbased products and, as a result, a higher base reserve for neutralizing acids.
  • base oil as used herein shall be understood to mean a base stock or blend of base stocks which is a lubricant component that is produced by a single manufacturer to the same specifications (independent of feed source or manufacturer's location); that meets the same manufacturer's specification; and that is identified by a unique formula, product identification number, or both.
  • the term "on an actives basis” refers to additive material that is not diluent oil or solvent.
  • isomerized olefins refers to olefins obtained by isomerizing olefins. Generally isomerized olefins have double bonds in different positions than the starting olefins from which they are derived, and may also have different characteristics.
  • a marine diesel cylinder lubricating oil composition which comprises (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of TPP and its unsulfurized metal salt.
  • the marine diesel cylinder lubricating oil compositions of this invention will have a TBN of from about 5 to about 120. In one embodiment, the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 20 to about 100. In one embodiment, the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 40 to about 100. In one embodiment, the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 55 to about 80. In one embodiment, the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 60 to about 80.
  • the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 10 to about 40. In one embodiment, the marine diesel cylinder lubricating oil compositions of this invention can have a TBN of from about 15 to about 35.
  • the marine diesel cylinder lubricating oil composition of the present invention is substantially free oftetrapropenyl phenol (TPP) and its unsulfurized metal salt, e.g., TPP and its calcium salt.
  • TPP tetrapropenyl phenol
  • the term "substantially free” as used herein means relatively low levels, if any, of the unsulfurized tetrapropenyl phenol and its unsulfurized metal salt, e.g., less than about 0.1 wt. % in the marine diesel cylinder lubricating oil composition. In another embodiment, the term “substantially free” is less than about 0.05 wt. % in the marine diesel cylinder lubricating oil composition.
  • the term “substantially free” is less than about 0.03 wt. % in the marine diesel cylinder lubricating oil composition. In another embodiment, the term “substantially free” is from about 0.0001 to about 0.03 wt. % in the marine diesel cylinder lubricating oil composition.
  • the marine diesel cylinder lubricating oil compositions of this invention can have a kinematic viscosity ranging from about 12.5 to about 26.1 centistokes (cSt) at 100°C. In another embodiment, the lubricating oil composition has a viscosity of about 12.5 to about 21.9, or about 16.3 to about 21.9 cSt at 100°C.
  • the kinematic viscosity of the marine diesel cylinder lubricating oil compositions is measured by ASTM D445.
  • the marine diesel cylinder lubricating oil compositions of the present invention can be prepared by any method known to a person of ordinary skill in the art for making marine diesel cylinder lubricating oil compositions.
  • the ingredients can be added in any order and in any manner. Any suitable mixing or dispersing equipment may be used for blending, mixing or solubilizing the ingredients.
  • the blending, mixing or solubilizing may be carried out with a blender, an agitator, a disperser, a mixer (e.g., planetary mixers and double planetary mixers), a homogenizer (e.g., a Gaulin homogenizer or Rannie homogenizer), a mill (e.g., colloid mill, ball mill or sand mill) or any other mixing or dispersing equipment known in the art.
  • a blender e.g., planetary mixers and double planetary mixers
  • a homogenizer e.g., a Gaulin homogenizer or Rannie homogenizer
  • a mill e.g., colloid mill, ball mill or sand mill
  • any other mixing or dispersing equipment known in the art.
  • the Group I basestock for use herein can be any petroleum derived base oil of lubricating viscosity as defined in API Publication 1509, 14th Edition, Addendum I, Dec. 1998.
  • API guidelines define a base stock as a lubricant component that may be manufactured using a variety of different processes.
  • Group I base oils generally refer to a petroleum derived lubricating base oil having a saturates content of less than 90 wt.
  • Group I base oils can comprise light overhead cuts and heavier side cuts from a vacuum distillation column and can also include, for example, Light Neutral, Medium Neutral, and Heavy Neutral base stocks.
  • the petroleum derived base oil also may include residual stocks or bottoms fractions, such as, for example, bright stock.
  • Bright stock is a high viscosity base oil which has been conventionally produced from residual stocks or bottoms and has been highly refined and dewaxed. Bright stock can have a kinematic viscosity greater than about 180 cSt at 40°C, or even greater than about 250 cSt at 40°C, or even ranging from about 500 to about 1 100 cSt at 40°C.
  • the one or more basestocks can be a blend or mixture of two or more, three or more, or even four or more Group I basestocks having different molecular weights and viscosities, wherein the blend is processed in any suitable manner to create a base oil having suitable properties (such as the viscosity and TBN values, discussed above) for use in a marine diesel engine.
  • the one or more basestocks comprises ExxonMobil CORE ® 100, ExxonMobil CORE ® 150, ExxonMobil CORE ® 600, ExxonMobil CORE ® 2500, or a combination or mixture thereof.
  • the one or more Group I basestocks for use in the marine diesel engine lubricating oil compositions of this invention are typically present in a major amount, e.g., an amount greater than about 50 wt. %, or greater than about 70 wt. %, based on the total weight of the composition. In one embodiment, the one or more Group I basestocks are present in an amount of from 70 wt. % to about 95 wt. %, based on the total weight of the composition. In one embodiment, the one or more Group I basestocks are present in an amount of from 70 wt. % to about 85 wt. %, based on the total weight of the composition.
  • the marine cylinder lubricants for use in marine diesel engines typically have a kinematic viscosity in the range of 12.5 to 26.1 cSt at 100°C.
  • a bright stock may be combined with a low viscosity oil, e.g., an oil having a viscosity from 4 to 6 cSt at 100°C.
  • supplies of bright stock are dwindling and therefore bright stock cannot be relied upon to increase the viscosity of marine cylinder lubricants to the desired ranges that manufacturers recommend.
  • PIB polyisobutylene
  • viscosity index improver compounds such as olefin copolymers
  • PIB is a commercially available material from several manufacturers.
  • the PIB is typically a viscous oil-miscible liquid, having a weight average molecular weight in the range of about 1 ,000 to about 8,000, or from about 1 ,500 to about 6,000, and a viscosity in the range of about 2,000 to about 5,000 or about 6,000 cS (100°C).
  • the amount of PIB added to the marine cylinder lubricants will normally be from about 1 to about 20 wt. % of the finished oil, or from about 2 to about 15 wt. % of the finished oil, or from about 4 to about 12 wt. % of the finished oil.
  • the marine diesel cylinder lubricating oil compositions of the present invention can contain minor amounts of basestocks other than a Group I basestock.
  • the marine diesel cylinder lubricating oil compositions can contain minor amounts of Groups II-V basestocks as defined in API Publication 1509, 16 Edition, Addendum I, Oct., 2009.
  • Group IV base oils are polyalphaolefins (PAO).
  • a Group II basestock generally refer to a petroleum derived lubricating base oil having a total sulfur content equal to or less than 300 parts per million (ppm) (as determined by ASTM D 2622, ASTM D 4294, ASTM D 4927 or ASTM D 3120), a saturates content equal to or greater than 90 weight percent (as determined by ASTM D 2007), and a viscosity index (VI) ofbetween 80 and 120 (as determinedby ASTM D 2270).
  • ppm parts per million
  • a Group III basestock generally has a total sulfur content less than or equal to 0.03 wt.% (as determinedby ASTM D 2270), a saturates content of greater than or equal to 90 wt.% (as determined by ASTM D 2007), and a viscosity index (VI) of greater than or equal to 120 (as determined by ASTM D 4294, ASTM D 4297 or ASTM D 3120).
  • the basestock is a Group III basestock, or a blend of two or more different Group III basestocks.
  • Group III basestocks derived from petroleum oils are severely hydrotreated mineral oils. Hydrotreating involves reacting hydrogen with the basestock to be treated to remove heteroatoms from the hydrocarbon, reduce olefins and aromatics to alkanes and cycloparaffins respectively, and in very severe hydrotreating, open up naphthenic ring structures to non-cyclic normal and iso-alkanes ("paraffins").
  • a Group III basestock has a paraffinic carbon content (% C P ) of at least about 70 %, as determined by test method ASTM D 3238-95 (2005), "Standard Test Method for Calculation of Carbon Distribution and Structural Group Analysis of Petroleum Oils by the n-d-M Method".
  • a Group III basestock has a paraffinic carbon content (% C p ) of at least about 72 %. In another embodiment, a Group III basestock has a paraffinic carbon content (% C P ) of at least about 75 %. In another embodiment, a Group III basestock has a paraffinic carbon content (% C P ) of at least about 78 %. In another embodiment, a Group III basestock has a paraffinic carbon content (% C p ) of at least about 80 %. In another embodiment, a Group III basestock has a paraffinic carbon content (% Cp) of at least about 85 %.
  • a Group III basestock has a naphthenic carbon content (% C Thread) of no more than about 25 %, as determined by ASTM D 3238-95 (2005). In another embodiment, a Group III basestock has a naphthenic carbon content (% C n ) of no more than about 20 %. In another embodiment, a Group III basestock has a naphthenic carbon content (% C n ) of no more than about 15 %. In another embodiment, a Group III basestock has a naphthenic carbon content (% C n ) of no more than about 10 %.
  • a Group III basestock for use herein is a Fischer-
  • a Fischer Tropsch base oil can be produced from a process in which the feed is a waxy feed recovered from a Fischer-Tropsch synthesis, see, e.g., U.S. Patent Application Publication Nos.
  • the process involves a complete or partial hydroisomerization dewaxing step, employing a dual- functional catalyst or a catalyst that can isomerize paraffins selectively.
  • Hydroisomerization dewaxing is achieved by contacting the waxy feed with a hydroisomerization catalyst in an isomerization zone under hydroisomerizing conditions.
  • Fischer-Tropsch synthesis products can be obtained by well-known processes such as, for example, the commercial SASOL ® Slurry Phase Fischer-Tropsch technology, the commercial SHELL ® Middle Distillate Synthesis (SMDS) Process, or by the non-commercial EXXON ® Advanced Gas Conversion (AGC-21) process. Details of these processes and others are described in, for example, WO-A-9934917; WO-A- 9920720; WO-A-05107935; EP-A-776959; EP-A-668342; U.S. Patent Nos. 4,943,672, 5,059,299, 5,733,839, and RE39073; and U.S. Patent Application Publication No. 2005/0227866.
  • the Fischer-Tropsch synthesis product can contain hydrocarbons having 1 to about 100 carbon atoms or, in some cases, more than 100 carbon atoms, and typically includes paraffins, olefins and oxygenated products.
  • a Group IV basestock, or polyalphaolefin (PAO) are typically made by the oligomerization of low molecular weight alpha-olefins, e.g., alpha-olefins containing at least 6 carbon atoms. In one embodiment, the alpha-olefins are alpha-olefins containing 10 carbon atoms. PAOs are mixtures of dimers, trimers, tetramers, etc., with the exact mixture depending upon the viscosity of the final basestock desired. PAOs are typically hydrogenated after oligomerization to remove any remaining unsaturation.
  • Group V base oils include all other base oils not included in Group I, II, III, or IV.
  • the marine diesel cylinder lubricating oil composition of the present invention further comprises a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydro xyl groups.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid and the one or more high overbased alkyl aromatic sulfonic acids or salts thereof can be provided as a concentrate in which the additive(s) are incorporated into a substantially inert, normally liquid organic diluent such as, for example, mineral oil, naphtha, benzene, toluene or xylene to form an additive concentrate.
  • a substantially inert, normally liquid organic diluent such as, for example, mineral oil, naphtha, benzene, toluene or xylene to form an additive concentrate.
  • These concentrates usually contain from about 10% to about 90% by weight of such diluent or from about 20% to about 80% by weight of such diluent, with the remaining amount being the specific additive.
  • a neutral oil having a viscosity of about 4 to about 8.5 cSt at 100°C and preferably about 4 to about 6 cSt at 100°C will be used as the diluent, though synthetic oils, as well as other organic liquids which are compatible with the additives and finished lubricating oil can also be used.
  • the concentrate is substantially free of an unsulfurized tetrapropenyl phenol compound and its unsulfurized metal salt, e.g., TPP and its calcium salt.
  • the term “substantially free” as used herein means relatively low levels, if any, of the unsulfurized tetrapropenyl phenol and its unsulfurized metal salt, e.g., less than about 0.1 wt. % in the concentrate. In another embodiment, the term “substantially free” is less than about 0.05 wt. %. In another embodiment, the term “substantially free” is less than about 0.03 wt. % in the concentrate. In another embodiment, the term “substantially free” is from about 0.0001 to about 0.03 wt. % in the concentrate.
  • the detergent composition employed in the marine diesel cylinder lubricating oil compositions of the present invention includes one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250.
  • the TBN of the one or more alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid are on an actives basis.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 800.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 750. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 700. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 650.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 600. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than 250 and up to about 410.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 to about 800. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 to about 750. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 to about 700.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 to about 650. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 to about 600. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 260 and up to about 410.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of greater than or equal to about 300. In another embodiment, the one or more alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 800. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 750.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 700. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 650. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 600. In one embodiment, the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid have a TBN of from about 300 to about 410.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are one or more alkaline earth metal salts of an alkyl-substituted hydroxybenzoic acid having a TBN of greater than 250.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are calcium alkyl-substituted hydroxyaromatic carboxylic acids having a TBN of greater than 250.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid has a major amount of one or more alkaline earth metal salts of mono-alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are one or more alkaline earth metal salts of an alkyl-substituted hydroxybenzoic acid having a TBN of greater than or equal to about 300.
  • the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are calcium alkyl-substituted hydroxyaromatic carboxylic acids having a TBN of greater than or equal to about 300.
  • the one or more alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid has a major amount of one or more alkaline earth metal salts of mo no -alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than or equal to about 300.
  • Suitable hydroxyaromatic compounds include mononuclear monohydroxy and polyhydroxy aromatic hydrocarbons having 1 to 4, and preferably 1 to 3, hydro xyl groups.
  • Suitable hydroxyaromatic compounds include phenol, catechol, resorcinol, hydroquinone, pyrogallol, cresol, and the like.
  • the preferred hydroxyaromatic compound is phenol.
  • the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl- substituted hydroxyaromatic carboxylic acid can be derived from an alpha olefin having from about 10 to about 80 carbon atoms. In one embodiment, the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid can be derived from an alpha olefin having from about 10 to about 40 carbon atoms.
  • the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl- substituted hydroxyaromatic carboxylic acid can be derived from an alpha olefin having from about 12 to about 28 carbon atoms.
  • the olefins employed may be linear, isomerized linear, branched or partially branched linear.
  • the olefin may be a mixture of linear olefins, a mixture of isomerized linear olefins, a mixture of branched olefins, a mixture of partially branched linear or a mixture of any of the foregoing.
  • the mixture of linear olefins that may be used is a mixture of normal alpha olefins selected from olefins having from about 12 to about 28, or about 20 to 28, carbon atoms per molecule.
  • the normal alpha olefins are isomerized using at least one of a solid or liquid catalyst.
  • the olefins include one or more olefins comprising
  • the one or more olefins will contain a major mount of the C9 to Ci8 oligomers of monomers selected from propylene, butylene or mixtures thereof.
  • examples of such olefins include propylene tetramer, butylene trimer and the like. As one skilled in the art will readily appreciate, other olefins may be present.
  • the other olefins that can be used in addition to the C9 to Ci8 oligomers include linear olefins, cyclic olefins, branched olefins other than propylene oligomers such as butylene or isobutylene oligomers, arylalkylenes and the like and mixtures thereof.
  • Suitable linear olefins include 1-hexene, 1 -nonene, 1-decene, 1-dodecene and the like and mixtures thereof.
  • Especially suitable linear olefins are high molecular weight normal alpha-olefins such as C 16 to C30 normal alpha-olefins, which can be obtained from processes such as ethylene oligomerization or wax cracking.
  • Suitable cyclic olefins include cyclohexene, cyclopentene, cyclooctene and the like and mixtures thereof.
  • Suitable branched olefins include butylene dimer or trimer or higher molecular weight isobutylene oligomers, and the like and mixtures thereof.
  • Suitable arylalkylenes include styrene, methyl styrene, 3- phenylpropene, 2-phenyl-2-butene and the like and mixtures thereof.
  • the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid can contain a mixture of C12 alkyl groups and C20 to C28 linear olefins. In one embodiment, the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid can contain up to about 50% by weight of C12 alkyl groups in mixture with at least about 50% by weight of C20 to C28 linear olefins.
  • the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid can contain up to 50% by weight of C20 to C28 linear olefins in mixture with at least 50% by weight of a branched hydrocarbyl radical derived from propylene oligomer.
  • the alkyl- substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid can contain up to 85% by weight of C20 to C28 linear olefins in mixture with at least 15% by weight of a branched hydrocarbyl radical derived from propylene oligomer.
  • At least about 75 mole% (e.g., at least about 80 mole%, at least about 85 mole%, at least about 90 mole%, at least about 95 mole%, or at least about 99 mole%) of the alkyl groups contained within the alkaline earth metal salt of an alkyl- substituted hydroxyaromatic carboxylic acid are C20 alkyl groups or higher.
  • the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid is an alkaline earth metal salt of an alkyl-substituted hydroxybenzoic acid that is derived from an alkyl-substituted hydroxybenzoic acid in which the alkyl groups are the residue of normal alpha-olefins containing at least 75 mole% C20 or higher normal alpha-olefins.
  • At least about 50 mole % (e.g., at least about 60 mole %, at least about 70 mole %, at least about 80 mole %, at least about 85 mole %, at least about 90 mole %, at least about 95 mole %, or at least about 99 mole %) of the alkyl groups contained within the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid are about C 14 to about C 18 .
  • the resulting alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 can be a mixture of ortho and para isomers.
  • the product will contain about 1 to 99% ortho isomer and 99 to 1% para isomer. In another embodiment, the product will contain about 5 to 70% ortho and 95 to 30% para isomer.
  • the alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are one in which the BN of the alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid has been increased by a process such as the addition of a base source (e.g., lime) and an acidic overbasing compound (e.g., carbon dioxide).
  • a base source e.g., lime
  • an acidic overbasing compound e.g., carbon dioxide
  • the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition having a TBN of about 5 to about 120 can range from about 0.1 wt. % to about 35 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the amount of the one or more alkaline earth metal salts of an alkyl- substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition having a TBN of about 20 to about 100 can range from about 1 wt. % to about 25 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition having a TBN of about 55 to about 80 can range from about 3 wt. % to about 20 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition having a TBN of about 60 to about 80 can range from about 3 wt. % to about 15 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxy aromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 2 wt. % to about 20 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition. In one embodiment, the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 3 wt.
  • the amount of the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250 present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 3 wt. % to about 10 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the detergent composition employed in the marine diesel cylinder lubricating oil compositions of the present invention also includes one or more high overbased alkyl aromatic sulfonic acids or salts thereof.
  • the alkyl aromatic sulfonic acids or salts thereof include alkyl aromatic sulfonic acids or salts thereof obtained by the alkylation of an aromatic compound.
  • the alkyl aromatic compound is then sulfonated to form an alkyl aromatic sulfonic acid.
  • the alkyl aromatic sulfonic acid can be neutralized with caustic to obtain an alkali or alkaline earth metal alkyl aromatic sulfonate compound.
  • At least one aromatic compound or a mixture of aromatic compounds may be used to form the alkyl aromatic sulfonic acid or salt thereof.
  • Suitable aromatic compounds or the aromatic compound mixture comprise at least one of monocyclic aromatics, such as benzene, toluene, xylene, cumene or mixtures thereof.
  • the at least one aromatic moiety of the alkyl aromatic sulfonic acids or salts contains no hydroxyl groups.
  • the at least one aromatic moiety of the alkyl aromatic sulfonic acids or salts compound is not a phenol.
  • the at least one aromatic compound or aromatic compound mixture is toluene.
  • the at least one alkyl aromatic compound or the mixture of aromatic compounds is commercially available or may be prepared by methods that are well known in the art.
  • the alkylating agent employed to alkylate the aromatic compound may be derived from a variety of sources. Such sources include the normal alpha olefins, linear alpha olefins, isomerized linear alpha olefins, dimerized and oligomerized olefins, and olefins derived from olefin metathesis.
  • the olefin may be a single carbon number olefin, or it may be a mixture of linear olefins, a mixture of isomerized linear olefins, a mixture of branched olefins, a mixture of partially branched olefins, or a mixture of any of the foregoing.
  • Another source from which the olefins may be derived is through cracking of petroleum or Fischer-Tropsch wax. The Fischer-Tropsch wax may be hydrotreated prior to cracking.
  • Other commercial sources include olefins derived from paraffin dehydrogenation and oligomerization of ethylene and other olefins, methanol-to-olefin processes (methanol cracker) and the like.
  • the olefins may selected from olefins with carbon numbers ranging from about 8 carbon atoms to about 60 carbon atoms. In one embodiment, the olefins are selected from olefins with carbon numbers ranging from about 10 to about 50 carbon atoms. In one embodiment, the olefins are selected from olefins with carbon numbers ranging from about 12 to about 40 carbon atoms.
  • the olefin or the mixture of olefins is selected from linear alpha olefins or isomerized alpha olefins containing from about 8 to about 60 carbon atoms. In one embodiment, the mixture of olefins is selected from linear alpha olefins or isomerized alpha olefins containing from about 10 to about 50 carbon atoms. In one embodiment, the mixture of olefins is selected from linear alpha olefins or isomerized olefins containing from about 12 to about 40 carbon atoms.
  • the linear olefins that may be used for the alkylation reaction may be one or a mixture of normal alpha olefins selected from olefins having from about 8 to about 60 carbon atoms per molecule. In one embodiment, the normal alpha olefin is selected from olefins having from about 10 to about 50 carbon atoms per molecule. In one embodiment, the normal alpha olefin is selected from olefins having from about 12 to about 40 carbon atoms per molecule.
  • the mixture of branched olefins is selected from polyolefins which may be derived from C3 or higher monoolefins (e.g., propylene oligomers, butylenes oligomers, or co-oligomers etc.). In one embodiment, the mixture of branched olefins is either propylene oligomers or butylenes oligomers or mixtures thereof.
  • the aromatic compound is alkylated with a mixture of normal alpha olefins containing from Cs to C 6 o carbon atoms. In one embodiment, the aromatic compound is alkylated with a mixture of normal alpha olefins containing from Cio to C50 carbon atoms. In another embodiment, the aromatic compound is alkylated with a mixture of normal alpha olefins containing from C12 to C40 carbon atoms to yield an aromatic alkylate.
  • the normal alpha olefins employed to make the alkylaromatic sulfonic acid or salt thereof are commercially available or may be prepared by methods that are well known in the art.
  • the normal alpha olefins are isomerized using a solid or a liquid acid catalyst.
  • a solid catalyst preferably has at least one metal oxide and an average pore size of less than 5.5 angstroms.
  • the solid catalyst is a molecular sieve with a one-dimensional pore system, such as SM-3, MAPO-11, SAPO-1 1, SSZ-32, ZSM-23, MAPO-39, SAPO-39, ZSM-22 or SSZ-20.
  • Other possible acidic solid catalysts useful for isomerization include ZSM-35, SUZ-4, NU-23, NU-87 and natural or synthetic ferrierites.
  • the process for isomerization of normal alpha olefins may be carried out in batch or continuous mode.
  • the process temperatures may range from about 50°C to about 250°C.
  • a typical method used is a stirred autoclave or glass flask, which maybe heated to the desired reaction temperature.
  • a continuous process is most efficiently carried out in a fixed bed process. Space rates in a fixed bed process can range from about 0.1 to about 10 or more weight hourly space velocity.
  • the isomerization catalyst is charged to the reactor and activated or dried at a temperature of at least 125°C under vacuum or flowing inert, dry gas. After activation, the temperature of the isomerization catalyst is adjusted to the desired reaction temperature and a flow of the olefin is introduced into the reactor. The reactor effluent containing the partially-branched, isomerized olefins is collected.
  • the resulting partially-branched, isomerized olefins contain a different olefin distribution (i.e., alpha olefin, beta olefin; internal olefin, tri-substituted olefin, and vinylidene olefin) and branching content than that of the unisomerized olefin and conditions are selected in order to obtain the desired olefin distribution and the degree of branching.
  • olefin distribution i.e., alpha olefin, beta olefin; internal olefin, tri-substituted olefin, and vinylidene olefin
  • the alkylated aromatic compound may be prepared using a
  • Bronsted acid catalyst a Lewis acid catalyst, or solid acidic catalysts.
  • the Bronsted acid catalyst may be selected from a group comprising hydrochloric acid, hydrofluoric acid, hydrobromic acid, sulfuric acid, perchloric acid, trifiuoromethane sulfonic acid, fluorosulfonic acid, and nitric acid and the like.
  • the Bronsted acid catalyst is hydrofluoric acid.
  • the Lewis acid catalyst may be selected from the group of Lewis acids comprising aluminum trichloride, aluminum tribromide, aluminum triiodide, boron trifiuoride, boron tribromide, boron triiodide and the like.
  • the Lewis acid catalyst is aluminum trichloride.
  • the solid acidic catalysts may be selected from a group comprising zeolites, acid clays, and/or silica-alumina.
  • An eligible solid catalyst is a cation exchange resin in its acid form, for example, crosslinked sulfonic acid catalyst.
  • the catalyst may be a molecular sieve. Suitable molecular sieves are silica-aluminophosphate molecular sieves or metal silica-aluminophosphate molecular sieves, in which the metal may be, for example, iron, cobalt or nickel.
  • Other suitable examples of solid acidic catalysts are disclosed in U.S. Patent No. 7,183,452, the contents of which are incorporated by reference herein.
  • the Bronsted acid catalyst may be regenerated after it becomes deactivated
  • alkylation technologies used to produce the alkyl aromatic will include
  • the acid catalyst may be recycled when used in a continuous process.
  • the acid catalyst may be recycled or regenerated when used in a batch process or a continuous process.
  • the alkylation process is carried out by reacting a first amount of at least one aromatic compound or a mixture of aromatic compounds with a first amount of a mixture of olefin compounds in the presence of a Bronsted acid catalyst, such as hydrofluoric acid, in a first reactor in which agitation is maintained, thereby producing a first reaction mixture.
  • a Bronsted acid catalyst such as hydrofluoric acid
  • the resulting first reaction mixture is held in a first alkylation zone under alkylation conditions for a time sufficient to convert the olefin to aromatic alkylate (i.e., a first reaction product).
  • the first reaction product is removed from the alkylation zone and fed to a second reactor wherein the first reaction product is reacted with an additional amount of at least one aromatic compound or a mixture of aromatic compounds and an additional amount of acid catalyst and, optionally, with an additional amount of a mixture of olefin compounds wherein agitation is maintained.
  • a second reaction mixture results and is held in a second alkylation zone under alkylation conditions for a time sufficient to convert the olefin to aromatic alkylate (i.e., a second reaction product).
  • the second reaction product is fed to a liquid-liquid separator to allow hydrocarbon (i.e., organic) products to separate from the acid catalyst.
  • the acid catalyst maybe recycled to the reactor(s) in a closed loop cycle.
  • the hydrocarbon product is further treated to remove excess un-reacted aromatic compounds and, optionally, olefinic compounds from the desired alkylate product. The excess aromatic compounds may also be recycled to the reactor(s).
  • the reaction takes place in more than two reactors which are located in series.
  • the second reaction product is fed to a third reactor wherein the second reaction product is reacted with an additional amount of at least one aromatic compound or a mixture of aromatic compounds and an additional amount of acid catalyst and, optionally, with an additional amount of a mixture of olefin compounds wherein agitation is maintained.
  • a third reaction mixture results and is held in a third alkylation zone under alkylation conditions for a time sufficient to convert the olefin to aromatic alkylate (i.e., a third reaction product).
  • the reactions take place in as many reactors as necessary to obtain the desired alkylated aromatic reaction product.
  • the total charge mole ratio of Bronsted acid catalyst to the olefin compounds is about 0.1 to about 1 for the combined reactors. In one embodiment, the charge mole ratio of Bronsted acid catalyst to the olefin compounds is no more than about 0.7 to about 1 in the first reactor and no less than about 0.3 to about 1 in the second reactor.
  • the total charge mole ratio of the aromatic compound to the olefin compounds is about 7.5: 1 to about 1 :1 for the combined reactors. In one embodiment, the charge mole ratio of the aromatic compound to the olefin compounds is no less than about 1.4: 1 to about 1 :1 in the first reactor and is no more than about 6.1 :1 to about 1 :1 in the second reactor. [00100] Many types of reactor configurations may be used for the reactor zone.
  • the alkylation process may be carried out at temperatures from about 0°C to about 100°C.
  • the process is carried out under sufficient pressure that a substantial portion of the feed components remain in the liquid phase. Typically, a pressure of 0 to 150 psig is satisfactory to maintain feed and products in the liquid phase.
  • the residence time in the reactor is a time that is sufficient to convert a substantial portion of the olefin to alkylate product.
  • the time required is from about 30 seconds to about 30 minutes.
  • a more precise residence time may be determined by those skilled in the art using batch stirred tank reactors to measure the kinetics of the alkylation process.
  • the at least one aromatic compound or mixture of aromatic compounds and the olefin compounds may be injected separately into the reaction zone or may be mixed prior to injection. Both single and multiple reaction zones may be used with the injection of the aromatic compounds and the olefin compounds into one, several, or all reaction zones. The reaction zones need not be maintained at the same process conditions.
  • the hydrocarbon feed for the alkylation process may comprise a mixture of aromatic compounds and olefin compounds in which the molar ratio of aromatic compounds to olefins is from about 0.5: 1 to about 50:1 or more. In the case where the molar ratio of aromatic compounds to olefin is >1.0 to 1 , there is an excess amount of aromatic compounds present. In one embodiment, an excess of aromatic compounds is used to increase reaction rate and improve product selectivity. When excess aromatic compounds are used, the excess un-reacted aromatic in the reactor effluent can be separated, e.g., by distillation, and recycled to the reactor.
  • the alkyl aromatic product is obtained as described above, it is further reacted to form an alkyl aromatic sulfonic acid, and can then be neutralized to the corresponding sulfonate.
  • Sulfonation of the alkyl aromatic compound may be performed by any method known to one of ordinary skill in the art.
  • the sulfonation reaction is typically carried out in a continuous falling film tubular reactor maintained at about 45 °C to about 75°C.
  • the alkyl aromatic compound is placed in the reactor along with sulfur trioxide diluted with air thereby producing an alkylaryl sulfonic acid.
  • alkyl aromatic compound is sulfonated with sulfur trioxide diluted with air.
  • the charge mole ratio of sulfur trioxide to alkylate is maintained at about 0.8 to about 1.1 : 1.
  • neutralization of the alkyl aromatic sulfonic acid may be carried out in a continuous or batch process by any method known to a person skilled in the art to produce alkyl aromatic sulfonates.
  • an alkyl aromatic sulfonic acid is neutralized with a source of alkali or alkaline earth metal or ammonia, thereby producing an alkyl aromatic sulfonate.
  • suitable alkali metals include lithium, sodium, potassium, rubidium, and cesium.
  • a suitable alkali metal includes sodium and potassium.
  • a suitable alkali metal is sodium.
  • suitable alkaline earth metals include calcium, barium, magnesium, or strontium and the like.
  • a suitable alkaline earth metal is calcium.
  • the source is an alkali metal base such as an alkali metal hydroxide, e.g., sodium hydroxide or potassium hydroxide.
  • the source is an alkaline earth metal base such as an alkaline earth metal hydroxide, e.g., calcium hydroxide.
  • the one or more alkyl aromatic sulfonic acid or salts thereof are one or more high overbased alkyl aromatic sulfonic acid or salts thereof.
  • overbasing is one in which the TBN of the alkyl aromatic sulfonic acid or salts thereof has been increased by a process such as, for example, the addition of a base source (e.g., lime) and an acidic overbasing compound (e.g., carbon dioxide).
  • a base source e.g., lime
  • an acidic overbasing compound e.g., carbon dioxide
  • the one or more high overbased alkyl aromatic sulfonic acids or salts thereof will have a TBN greater than 250. In one embodiment, the one or more high overbased alkyl aromatic sulfonic acids or salts thereof will have a TBN of about 250 to about 700. In one embodiment, the one or more high overbased alkyl aromatic sulfonic acids or salts thereof will have a TBN greater than or equal to about 300. In one embodiment, the one or more high overbased alkyl aromatic sulfonic acids or salts thereof will have a TBN of about 300 to about 700.
  • the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition having a TBN of about 5 to about 120 can range from about 0.1 wt. % to about 34 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition having a TBN of about 20 to about 100 can range from about 1 wt. % to about 30 wt.
  • the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition having a TBN of about 55 to about 80 can range from about 2 wt. % to about 24 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition. In one embodiment, the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition having a TBN of about 60 to about 80 can range from about 5 wt.
  • the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 1.5 wt. % to about 20 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition. In one embodiment, the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 2 wt.
  • the amount of the one or more high overbased alkyl aromatic sulfonic acid or salts thereof present in a marine diesel cylinder lubricating oil composition of the present invention can range from about 2 wt. % to about 15 wt. % on an active basis, based on the total weight of the marine diesel cylinder lubricating oil composition.
  • the marine diesel cylinder lubricating oil compositions of the present invention may also contain conventional marine diesel cylinder lubricating oil composition additives, other than the foregoing one or more alkaline earth metal salts of an alkyl- substituted hydro xyaromatic carboxylic acid having a TBN of greater than 250 and the one or more high overbased alkyl aromatic sulfonic acids or salts thereof, thereof, for imparting auxiliary functions to give a marine diesel cylinder lubricating oil composition in which these additives are dispersed or dissolved.
  • conventional marine diesel cylinder lubricating oil composition additives other than the foregoing one or more alkaline earth metal salts of an alkyl- substituted hydro xyaromatic carboxylic acid having a TBN of greater than 250 and the one or more high overbased alkyl aromatic sulfonic acids or salts thereof, thereof, for imparting auxiliary functions to give a marine diesel cylinder lubricating oil composition in which these additives are dispersed or dissolved.
  • the marine diesel cylinder lubricating oil compositions can be blended with antioxidants, ashless dispersants, other detergents, anti-wear agents, rust inhibitors, dehazing agents, demulsifying agents, metal deactivating agents, friction modifiers, pour point depressants, antifoaming agents, co- solvents, corrosion-inhibitors, dyes, extreme pressure agents and the like and mixtures thereof.
  • antioxidants ashless dispersants, other detergents, anti-wear agents, rust inhibitors, dehazing agents, demulsifying agents, metal deactivating agents, friction modifiers, pour point depressants, antifoaming agents, co- solvents, corrosion-inhibitors, dyes, extreme pressure agents and the like and mixtures thereof.
  • additives are known and commercially available. These additives, or their analogous compounds, can be employed for the preparation of the marine diesel cylinder lubricating oil compositions of the invention by the usual blending procedures.
  • the marine diesel cylinder lubricating oil compositions of the present invention contain essentially no thickener (i.e., a viscosity index improver).
  • antioxidants include, but are not limited to, aminic types, e.g., diphenylamine, phenyl-alpha-napthyl-amine, N,N-di(alkylphenyl) amines; and alkylated phenylene-diamines; phenolics such as, for example, BHT, sterically hindered alkyl phenols such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-p-cresol and 2,6-di-tert-butyl-4- (2-octyl-3 -propanoic) phenol; and mixtures thereof.
  • aminic types e.g., diphenylamine, phenyl-alpha-napthyl-amine, N,N-di(alkylphenyl) amines
  • alkylated phenylene-diamines phenolics such as, for example, BHT, sterically
  • the ashless dispersant compounds employed in the marine diesel cylinder lubricating oil compositions of the present invention are generally used to maintain in suspension insoluble materials resulting from oxidation during use, thus preventing sludge flocculation and precipitation or deposition on metal parts. Dispersants may also function to reduce changes in lubricating oil viscosity by preventing the growth of large contaminant particles in the lubricant.
  • the dispersant employed in the present invention may be any suitable ashless dispersant or mixture of multiple ashless dispersants for use in a marine diesel cylinder lubricating oil composition.
  • An ashless dispersant generally comprises an oil soluble polymeric hydrocarbon backbone having functional groups that are capable of associating with particles to be dispersed.
  • an ashless dispersant is one or more basic nitrogen- containing ashless dispersants.
  • Nitrogen-containing basic ashless (metal-free) dispersants contribute to the base number or BN (as can be measured by ASTM D 2896) of a lubricating oil composition to which they are added, without introducing additional sulfated ash.
  • Basic nitrogen-containing ashless dispersants useful in this invention include hydrocarbyl succinimides; hydrocarbyl succinamides; mixed ester/amides of hydrocarbyl- substituted succinic acids formed by reacting a hydrocarbyl-substituted succinic acylating agent stepwise or with a mixture of alcohols and amines, and/or with amino alcohols; Mannich condensation products of hydrocarbyl-substituted phenols, formaldehyde and polyamines; and amine dispersants formed by reacting high molecular weight aliphatic or alicyclic halides with amines, such as polyalkylene polyamines. Mixtures of such dispersants can also be used.
  • ashless dispersants include, but are not limited to, amines, alcohols, amides, or ester polar moieties attached to the polymer backbones via bridging groups.
  • An ashless dispersant of the present invention may be, for example, selected from oil soluble salts, esters, amino-esters, amides, imides, and oxazo lines of long chain hydrocarbon substituted mono and dicarboxylic acids or their anhydrides; thiocarboxylate derivatives of long chain hydrocarbons, long chain aliphatic hydrocarbons having a polyamine attached directly thereto; and Mannich condensation products formed by condensing a long chain substituted phenol with formaldehyde and polyalkylene poly amine.
  • Carboxylic dispersants are reaction products of carboxylic acylating agents
  • reaction products include imides, amides, and esters.
  • Succinimide dispersants are a type of carboxylic dispersant. They are produced by reacting hydrocarbyl-substituted succinic acylating agent with organic hydroxy compounds, or with amines comprising at least one hydrogen atom attached to a nitrogen atom, or with a mixture of the hydroxy compounds and amines.
  • succinic acylating agent refers to a hydrocarbon-substituted succinic acid or a succinic acid-producing compound, the latter encompasses the acid itself.
  • Such materials typically include hydrocarbyl-substituted succinic acids, anhydrides, esters (including half esters) and halides.
  • Succinic-based dispersants have a wide variety of chemical structures.
  • One class of succinic-based dispersants may be represented by the formula:
  • each R is independently a hydrocarbyl group, such as a polyolefin-derived group.
  • the hydrocarbyl group is an alkyl group, such as a polyisobutyl group.
  • the R 1 groups can contain about 40 to about 500 carbon atoms, and these atoms may be present in aliphatic forms.
  • R 2 is an alkylene group, commonly an ethylene (C2H4) group.
  • succinimide dispersants include those described in, for example, U.S. Patent Nos. 3,172,892, 4,234,435 and 6,165,235.
  • the polyalkenes from which the substituent groups are derived are typically homopolymers and interpolymers of polymerizable olefin monomers of 2 to about 16 carbon atoms, and usually 2 to 6 carbon atoms.
  • the amines which are reacted with the succinic acylating agents to form the carboxylic dispersant composition can be monoamines or polyamines.
  • Succinimide dispersants are referred to as such since they normally contain nitrogen largely in the form of imide functionality, although the amide functionality may be in the form of amine salts, amides, imidazolines as well as mixtures thereof.
  • a succinimide dispersant one or more succinic acid-producing compounds and one or more amines are heated and typically water is removed, optionally in the presence of a substantially inert organic liquid solvent/diluent.
  • the reaction temperature can range from about 80°C up to the decomposition temperature of the mixture or the product, which typically falls between about 100°C to about 300°C.
  • Suitable ashless dispersants may also include amine dispersants, which are reaction products of relatively high molecular weight aliphatic halides and amines, preferably polyalkylene polyamines.
  • amine dispersants include those described in, for example, U.S. Patent Nos. 3,275,554, 3,438,757, 3,454,555 and 3,565,804.
  • Suitable ashless dispersants may further include "Mannich dispersants," which are reaction products of alkyl phenols in which the alkyl group contains at least about 30 carbon atoms with aldehydes (especially formaldehyde) and amines (especially polyalkylene polyamines). Examples of such dispersants include those described in, for example, U.S. Patent Nos. 3,036,003, 3,586,629, 3,591 ,598 and 3,980,569.
  • Suitable ashless dispersants may also be post-treated ashless dispersants such as post-treated succinimides, e.g., post-treatment processes involving borate or ethylene carbonate as disclosed in, for example, U.S. Patent Nos. 4,612,132 and 4,746,446; and the like as well as other post-treatment processes.
  • the carbonate -treated alkenyl succinimide is a polybutene succinimide derived from polybutenes having a molecular weight of about 450 to about 3000, preferably from about 900 to about 2500, more preferably from about 1300 to about 2400, and most preferably from about 2000 to about 2400, as well as mixtures of these molecular weights.
  • it is prepared by reacting, under reactive conditions, a mixture of a polybutene succinic acid derivative, an unsaturated acidic reagent copolymer of an unsaturated acidic reagent and an olefin, and a polyamine, such as disclosed in U.S. Patent No. 5,716,912, the contents of which are incorporated herein by reference.
  • Metal-containing or ash-forming detergents function as both detergents to reduce or remove deposits and as acid neutralizers or rust inhibitors, thereby reducing wear and corrosion and extending engine life.
  • Detergents generally comprise a polar head with a long hydrophobic tail.
  • the polar head comprises a metal salt of an acidic organic compound.
  • the salts may contain a substantially stoichiometric amount of the metal in which case they are usually described as normal or neutral salts, and would typically have a total base number or TBN (as can be measured by ASTM D2896) of from 0 to about 80.
  • a large amount of a metal base may be incorporated by reacting excess metal compound (e.g., an oxide or hydroxide) with an acidic gas (e.g., carbon dioxide).
  • the resulting overbased detergent comprises neutralized detergent as the outer layer of a metal base (e.g., carbonate) micelle.
  • Such overbased detergents may have a TBN of about 50 or greater, or a TBN of about 100 or greater, or a TBN of about 200 or greater, or a TBN of from about 250 to about 450 or more.
  • Representative examples of other metal detergents that can be included in the marine diesel cylinder lubricating oil composition of the present invention include phenates, aliphatic sulfonates, alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of equal to or less than 250, alkali metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid, phosphonates, and phosphinates.
  • the salts of the alkyl-substituted hydroxyaromatic carboxylic acid can be as described above.
  • Overbased metal detergents are generally produced by carbonating a mixture of hydrocarbons, detergent acid, for example: sulfonic acid, carboxylate etc., metal oxide or hydroxides (for example calcium oxide or calcium hydroxide) and promoters such as xylene, methanol and water.
  • detergent acid for example: sulfonic acid, carboxylate etc.
  • metal oxide or hydroxides for example calcium oxide or calcium hydroxide
  • promoters such as xylene, methanol and water.
  • the calcium oxide or hydroxide reacts with the gaseous carbon dioxide to form calcium carbonate.
  • the sulfonic acid is neutralized with an excess of CaO or Ca(OH) 2 , to form the sulfonate.
  • Overbased detergents may be low overbased, e.g., an overbased salt having a BN below about 100.
  • the BN of a low overbased salt may be from about 5 to about 50.
  • the BN of a low overbased salt may be from about 10 to about 30.
  • the BN of a low overbased salt may be from about 15 to about 20.
  • Overbased detergents may be medium overbased, e.g., an overbased salt having a BN from about 100 to about 250.
  • the BN of a medium overbased salt may be from about 100 to about 200.
  • the BN of a medium overbased salt may be from about 125 to about 175.
  • Overbased detergents may be high overbased, e.g., an overbased salt having a BN above 250.
  • the BN of a high overbased salt may be from about 250 to about 550.
  • rust inhibitors include, but are not limited to, nonionic polyoxyalkylene agents, e.g., polyoxy ethylene lauryl ether, polyoxy ethylene higher alcohol ether, polyoxy ethylene nonylphenyl ether, polyoxy ethylene octylphenyl ether, polyoxy ethylene octyl stearyl ether, polyoxyethylene oleyl ether, polyoxy ethylene sorbitol monostearate, polyoxyethylene sorbitol monooleate, and polyethylene glycol monooleate; stearic acid and other fatty acids; dicarboxylic acids; metal soaps; fatty acid amine salts; metal salts of heavy sulfonic acid; partial carboxylic acid ester of polyhydric alcohol; phosphoric esters; (short-chain) alkenyl succinic acids; partial esters thereof and nitrogen- containing derivatives thereof; synthetic alkarylsulfonates, e.g., metal dinony
  • friction modifiers include, but are not limited to, alkoxylated fatty amines; borated fatty epoxides; fatty phosphites, fatty epoxides, fatty amines, borated alkoxylated fatty amines, metal salts of fatty acids, fatty acid amides, glycerol esters, borated glycerol esters; and fatty imidazolines as disclosed in U.S. Patent No.
  • friction modifiers obtained from a reaction product of a C4 to C75, preferably a C 6 to C24, and most preferably a C 6 to C20, fatty acid ester and a nitrogen-containing compound selected from the group consisting of ammonia, and an alkanolamine and the like and mixtures thereof.
  • antiwear agents include, but are not limited to, zinc dialkyldithiophosphates and zinc diaryldithiophosphates, e.g., those described in an article by Born et al. entitled “Relationship between Chemical Structure and Effectiveness of Some Metallic Dialkyl- and Diaryl-dithiophosphates in Different Lubricated Mechanisms", appearing in Lubrication Science 4-2 January 1992, see for example pages 97-100; aryl phosphates and phosphites, sulfur-containing esters, phosphosulfur compounds, metal or ash-free dithiocarbamates, xanthates, alkyl sulfides and the like and mixtures thereof.
  • antifoaming agents include, but are not limited to, polymers of alkyl methacrylate; polymers of dimethylsilicone and the like and mixtures thereof.
  • a pour point depressant examples include, but are not limited to, polymethacrylates, alkyl acrylate polymers, alkyl methacrylate polymers, di(tetra-paraffin phenol)phthalate, condensates of tetra-paraffin phenol, condensates of a chlorinated paraffin with naphthalene and combinations thereof.
  • a pour point depressant comprises an ethylene -vinyl acetate copolymer, a condensate of chlorinated paraffin and phenol, polyalkyl styrene and the like and combinations thereof.
  • the amount of the pour point depressant may vary from about 0.01 wt. % to about 10 wt. %.
  • Examples of a demulsifier include, but are not limited to, anionic surfactants
  • alkyl-naphthalene sulfonates e.g., alkyl-naphthalene sulfonates, alkyl benzene sulfonates and the like
  • nonionic alkoxylated alkylphenol resins polymers of alkylene oxides (e.g., polyethylene oxide, polypropylene oxide, block copolymers of ethylene oxide, propylene oxide and the like), esters of oil soluble acids, polyoxyethylene sorbitan ester and the like and combinations thereof.
  • the amount of the demulsifier may vary from about 0.01 wt. % to about 10 wt. %.
  • Examples of a corrosion inhibitor include, but are not limited to, half esters or amides of dodecylsuccinic acid, phosphate esters, thiophosphates, alkyl imidazolines, sarcosines and the like and combinations thereof.
  • the amount of the corrosion inhibitor may vary from about 0.01 wt. % to about 0.5 wt. %.
  • an extreme pressure agent examples include, but are not limited to, sulfurized animal or vegetable fats or oils, sulfurized animal or vegetable fatty acid esters, fully or partially esterified esters of trivalent or pentavalent acids of phosphorus, sulfurized olefins, dihydrocarbyl polysulfides, sulfurized Diels-Alder adducts, sulfurized dicyclopentadiene, sulfurized or co-sulfurized mixtures of fatty acid esters and monounsaturated olefins, co-sulfurized blends of fatty acid, fatty acid ester and alpha- olefin, functionally-substituted dihydrocarbyl polysulfides, thia-aldehydes, thia-ketones, epithio compounds, sulfur-containing acetal derivatives, co-sulfurized blends of terpene and acyclic olefins, and polysulfide olefin products,
  • the amount of the extreme pressure agent may vary from about 0.01 wt. % to about 5 wt. %.
  • Each of the foregoing additives, when used, is used at a functionally effective amount to impart the desired properties to the lubricant.
  • a functionally effective amount of this friction modifier would be an amount sufficient to impart the desired friction modifying characteristics to the lubricant.
  • the concentration of each of these additives, when used ranges from about 0.001% to about 20% by weight, and in one embodiment about 0.01% to about 10% by weight based on the total weight of the lubricating oil composition.
  • the foregoing marine diesel cylinder lubricating oil composition additives may be provided as an additive package or concentrate in which the additives are incorporated into a substantially inert, normally liquid organic diluent as described above.
  • the additive package will typically contain one or more of the various additives, referred to above, in the desired amounts and ratios to facilitate direct combination with the requisite amount of the oil of lubricating viscosity.
  • the marine diesel cylinder lubricating oil composition of the present invention is substantially free or free of any dispersants and/or zinc compounds, e.g., zinc dithiophosphates.
  • the term "substantially free” as used herein means relatively low levels, if any, of each of the dispersants and/or zinc compounds, e.g., less than about 0.5 wt. % of each of the dispersants and/or zinc compounds in the marine diesel cylinder lubricating oil composition. In another embodiment, the term “substantially free” is less than about 0.1 wt. % of each of the dispersants and/or zinc compounds in the marine diesel cylinder lubricating oil composition. In another embodiment, the term “substantially free” is less than about 0.01 wt. % of each of the dispersants and/or zinc compounds in the marine diesel cylinder lubricating oil composition.
  • a marine diesel cylinder lubricating oil composition which comprises (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a total base number (TBN) of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120.
  • TBN total base number
  • a method for lubricating a marine two-stroke crosshead diesel engine with a marine diesel cylinder lubricant composition having improved high temperature detergency and thermal stability comprising operating the engine with a marine diesel cylinder lubricating oil composition comprising (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120.
  • a third embodiment of the present invention is directed to a use of a marine diesel cylinder lubricating oil composition in a two-stroke crosshead marine diesel engine; wherein the marine diesel cylinder lubricant composition comprises (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, to provide a marine diesel cylinder lubricating oil composition having improved high temperature detergency and thermal stability.
  • total TPP concentration of total TPP and its unsulfurized metal salt in the marine diesel cylinder lubricating oil composition of the present invention
  • total TPP concentration of total TPP and its unsulfurized metal salt in the marine diesel cylinder lubricating oil composition of the present invention
  • total residual TPP concentration of total TPP and its unsulfurized metal salt in the marine diesel cylinder lubricating oil composition of the present invention
  • HPLC High Performance Liquid Chromatography
  • the HPLC system used in the HPLC method included a HPLC pump, a thermostatted HPLC column compartment, HPLC fluorescence detector, and PC-based chromatography data acquisition system.
  • the particular system described is based on an Agilent 1200 HPLC with ChemStation software.
  • the HPLC column was a Phenomenex Luna C8(2) 150 x 4.6mm 5 ⁇ ⁇ , P/N 00F4249E0.
  • Injection Size 1 of diluted sample
  • the resulting chromatograph typically contains several peaks. Peaks due to the free unsulfurized alkylhydroxyaromatic compound (i.e., TPP) typically elute together at early retention times; whereas peaks due to sulfurized alkylhydroxyaromatic compounds typically elute at longer retention times.
  • TPP free unsulfurized alkylhydroxyaromatic compound
  • sulfurized alkylhydroxyaromatic compounds typically elute at longer retention times.
  • the area of the single largest peak of the free unsulfurized alkylhydroxyaromatic compound and its unsulfurized metal salt was measured, and then that area was used to determine the concentration of the total free unsulfurized alkylhydroxyaromatic compound and its unsulfurized metal salt species. The assumption is that the speciation of alkylhydroxyaromatic compounds does not change; if something does change the speciation of the alkylhydroxyaromatic compounds, then recalibration is necessary.
  • the area of the chosen peak is compared to a calibration curve to arrive at the wt-% of free alkylphenol and free unsulfurized salts of alkylphenols.
  • the calibration curve was developed using the same peak in the chromatograph obtained for the free unsulfurized alkylhydroxyaromatic compound used to make the phenate product.
  • the Komatsu Hot Tube test is a lubrication industry bench test that measures the detergency and thermal and oxidative stability of a lubricating oil. Detergency and thermal and oxidative stability are performance areas that are generally accepted in the industry as being essential to satisfactory overall performance of a lubricating oil.
  • a specified amount of test oil is pumped upwards through a glass tube that is placed inside an oven set at a certain temperature. Air is introduced in the oil stream before the oil enters the glass tube, and flows upward with the oil. Evaluations of the marine diesel cylinder lubricating oils were conducted at temperatures between 300-330 degrees Celsius.
  • the test result is determined by comparing the amount of lacquer deposited on the glass test tube to a rating scale ranging from 1.0 (very black) to 10.0 (perfectly clean). The result is reported in multiples of 0.5.
  • Blockage is a deposition in which case the lacquer is very thick and most of the glass test tube is blocked, preventing normal oil and air flow through the test tube. Although blocking can be considered a result inferior to a 1.0 rating, its occurrence can be greatly influenced by blocking of other test tubes that are simultaneously tested in the same test run.
  • ExxonMobil CORE ® 600N Group I-based lubricating oil was ExxonMobil
  • ExxonMobil CORE ® 2500BS Group I-based lubricating oil was ExxonMobil CORE ® 2500BS basestock, available from ExxonMobil (Irving, TX.).
  • Detergent A An oil concentrate of a neutral (non-overbased) calcium alky lhydroxybenzo ate additive, having an alkyl substituent derived from C20 to C28 linear olefins, prepared according to the method described in Example 1 of US Patent Application 2007/0027043, but without the subsequent overbasing step.
  • This additive concentrate contained 2.17 wt. % Ca and about 43.0 wt. % diluent oil, and had a TBN of 61. On an active basis, the TBN of this additive (absent diluent oil) is 107.
  • Detergent B An oil concentrate of an overbased sulfurized calcium phenate derived from propylene tetramer.
  • This additive contained 9.6 wt. % Ca, and about 31.4 wt. % diluent oil, and had a TBN of 260.
  • Detergent B is believed to have a total TPP content, i.e., TPP and its unsulfurized metal salt, of from about 5 to 7 wt.%, based on the weight of the detergent as manufactured.
  • Detergent C An oil concentrate of an unsulfurized, non-overbased alkylhydroxybenzoate-containing, phenol-distilled additive, having an alkyl substituent derived from about 50 wt. % C20 to C28 linear olefins and 50 wt. % branched hydrocarbyl radical propylene tetramer, prepared according to the method described in Example 1 of US Patent Application 2004/0235686.
  • This additive contained 5.00 wt. % Ca, and about 33.0 wt. % diluent oil, and had a TBN of 140. On an active basis, the TBN of this additive (absent diluent oil) is 210.
  • Detergent C is believed to have a total TPP content, i.e., TPP and its unsulfurized metal salt, of from about 2 to 3 wt.%, based on the weight of the detergent as manufactured.
  • Detergent D An oil concentrate of an overbased calcium alky lhydroxybenzo ate additive, having an alkyl substituent derived from C20 to C28 linear olefins, prepared according to the method described in Example 1 of US Patent Application 2007/0027043.
  • This additive contained 5.35 wt. % Ca, and about 35.0 wt. % diluent oil, and had a TBN of 150. On an active basis, the TBN of this additive (absent diluent oil) is 230.
  • Detergent E An oil concentrate of an overbased calcium alky lhydroxybenzo ate additive, having an alkyl substituent derived from C20 to C28 linear olefins, prepared according to the method described in Example 1 of US Patent Application 2007/0027043.
  • This additive contained 12.5 wt. % Ca, and about 33.0 wt. % diluent oil, and had a TBN of 350. On an active basis, the TBN of this additive (absent diluent oil) is 522.
  • Detergent F An oil concentrate of an overbased calcium alkyltoluene sulfonate detergent; wherein the alkyl group is derived from C20 to C24 linear alpha olefins.
  • This additive concentrate contained 16.1 wt. % Ca, and about 38.7 wt. % diluent oil, and had a TBN of 420. On an active basis, the TBN of this additive (absent diluent oil) is 685.
  • Detergent G An oil concentrate of an overbased calcium alky lhydroxybenzo ate additive, having an alkyl substituent derived from CM to Cis linear alpha olefins. This additive contained 6.25 wt. % Ca, and about 41.0 wt. % diluent oil, and had a TBN of 175. On an active basis, the TBN of this additive (absent diluent oil) is 296
  • the marine diesel cylinder lubricating oil compositions of Examples 1-3 and Comparative Examples A-G were prepared as set forth below in Table 1.
  • Each marine diesel cylinder lubricating oil compositions of Example 1 and Comparative Examples A- G were a SAE 50 viscosity grade oil, having a kinematic viscosity of about 19.5 cSt @100°C and a TBN of about 70 mg KOH/g.
  • Example 2 was a SAE 40 viscosity grade oil, having a kinematic viscosity of about 13.9 cSt @ 100°C and a TBN of about 40 mg KOH/g.
  • Example 3 was a SAE 50 viscosity grade oil, having a kinematic viscosity of about 19.1 cSt @100°C and a TBN of about 20 mgKOH/g.
  • the marine diesel cylinder lubricating oil compositions of Examples 1 -3 and Comparative Examples A-G were formulated using a major amount of a Group I basestock, a detergent composition as defined in Table 1, and 0.04 wt. % foam inhibitor.
  • Comparative Example D further included 1.0 wt. % of an oil concentrate of a bissuccinimide dispersant derived from 1000MW polyisobutylene succinic anhydride (PIBSA) and heavy polyamine (HP A)/di ethylene triamine (DETA), having about 31.7 wt. % diluent oil.
  • PIBSA polyisobutylene succinic anhydride
  • DETA heavy polyamine
  • Each of the marine diesel cylinder lubricating oil compositions of Examples 1-3 contained no TPP
  • TBN mgKOH/g 70 40 20 70 70 70 70 70 70 70
  • the marine diesel cylinder lubricating oil compositions of Examples 1-3 exhibited surprisingly comparable or improved detergency properties over the marine diesel cylinder lubricating oil compositions of Comparative Examples A-G.
  • the marine diesel cylinder lubricating oil composition of Example 1 provided comparable performance as compared to the marine diesel cylinder lubricating oil composition of Comparative Example A which contains TPP.
  • the marine diesel cylinder lubricating oil composition of Example 1 provided the comparable performance at a lower concentration of the detergent combination as compared to the concentration of Detergent B in the marine diesel cylinder lubricating oil composition of Comparative Example A.
  • the marine diesel cylinder lubricating oil composition of Example 1 provided improved performance as compared to the marine diesel cylinder lubricating oil composition of Comparative Examples B and C.
  • the marine diesel cylinder lubricating oil composition of Example 1 provided comparable performance as compared to the marine diesel cylinder lubricating oil composition of Comparative Examples D-G while employing a lower concentration of the detergent combination than the concentration of the detergent combination in Comparative Examples D-G.
  • the marine diesel cylinder lubricating oil composition of Examples 2 and 3 having a TBN of 40 and 20, respectively provided comparable to improved performance as compared to the marine diesel cylinder lubricating oil composition of Comparative Examples A-G having a TBN of 70.
  • Examples 1-3 are all substantially free of total TPP, while Comparative Examples A, D and E all contain greater than 0.1 wt. % TPP and its unsulfurized metal salt.

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Abstract

La présente invention concerne des compositions d'huiles lubrifiantes pour cylindres de moteurs diesel marins comprenant (a) une quantité principale d'une ou plusieurs huiles de base du groupe II, et (b) une composition détergente comprenant (i) un ou plusieurs sels de métaux alcalinoterreux d'un acide carboxylique hydroxyaromatique substitué par un alkyle, présentant un indice de base total (TBN) supérieur à 250, et (ii) un ou plusieurs acides sulfoniques alkylaromatiques fortement surbasiques ou des sels correspondants ; la fraction aromatique des acides sulfoniques alkylaromatiques ou des sels associés ne contenant pas de groupe hydroxyle ; et la composition d'huile lubrifiante pour cylindres de moteurs diesel marins présentant un indice de base total d'environ 5 à environ 120 et étant sensiblement exempte de tétrapropényl phénol (TTP) et de ses sels de métaux non sulfurisés.
PCT/EP2015/075989 2014-11-06 2015-11-06 Compositions d'huiles lubrifiantes pour cylindres de moteurs diesel marins WO2016071519A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SG11201703710TA SG11201703710TA (en) 2014-11-06 2015-11-06 Marine diesel cylinder lubricant oil compositions
EP15790599.3A EP3215592A1 (fr) 2014-11-06 2015-11-06 Compositions d'huiles lubrifiantes pour cylindres de moteurs diesel marins
CN201580060216.XA CN107109288A (zh) 2014-11-06 2015-11-06 船用柴油机汽缸润滑油组合物
KR1020177013779A KR20170078706A (ko) 2014-11-06 2015-11-06 선박용 디젤 실린더 윤활유 조성물
JP2017524034A JP2017533329A (ja) 2014-11-06 2015-11-06 船舶用ディーゼルシリンダー潤滑油組成物

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US201462076305P 2014-11-06 2014-11-06
US62/076,305 2014-11-06

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CN110997883A (zh) * 2017-06-30 2020-04-10 雪佛龙奥伦耐有限责任公司 船用柴油机润滑油组合物
CN111051481A (zh) * 2017-06-30 2020-04-21 雪佛龙奥伦耐有限责任公司 船用柴油机润滑油组合物
JP2020525585A (ja) * 2017-06-30 2020-08-27 シェブロン・オロナイト・カンパニー・エルエルシー 清浄剤化合物を含有する潤滑油組成物
JP2020525619A (ja) * 2017-06-30 2020-08-27 シェブロン・オロナイト・カンパニー・エルエルシー 船舶用ディーゼル潤滑油組成物
JP2020525616A (ja) * 2017-06-30 2020-08-27 シェブロン・オロナイト・カンパニー・エルエルシー 低温性能が改善された船舶用ディーゼル潤滑油組成物
JP2020527617A (ja) * 2017-06-30 2020-09-10 シェブロン・オロナイト・カンパニー・エルエルシー 船舶用ディーゼル潤滑油組成物
JP7013495B2 (ja) 2017-06-30 2022-01-31 シェブロン・オロナイト・カンパニー・エルエルシー 船舶用ディーゼル潤滑油組成物
JP2022104977A (ja) * 2017-06-30 2022-07-12 シェブロン・オロナイト・カンパニー・エルエルシー 船舶用ディーゼル潤滑油組成物
JP2022104978A (ja) * 2017-06-30 2022-07-12 シェブロン・オロナイト・カンパニー・エルエルシー 低温性能が改善された船舶用ディーゼル潤滑油組成物
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CN110997883B (zh) * 2017-06-30 2023-07-25 雪佛龙奥伦耐有限责任公司 船用柴油机润滑油组合物
JP7348079B2 (ja) 2017-06-30 2023-09-20 シェブロン・オロナイト・カンパニー・エルエルシー 清浄剤化合物を含有する潤滑油組成物
JP7463424B2 (ja) 2017-06-30 2024-04-08 シェブロン・オロナイト・カンパニー・エルエルシー 低温性能が改善された船舶用ディーゼル潤滑油組成物
JP7463423B2 (ja) 2017-06-30 2024-04-08 シェブロン・オロナイト・カンパニー・エルエルシー 船舶用ディーゼル潤滑油組成物

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KR20170078706A (ko) 2017-07-07
SG11201703710TA (en) 2017-06-29

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