WO2023037180A1 - Renewable based e-drive fluids - Google Patents
Renewable based e-drive fluids Download PDFInfo
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- WO2023037180A1 WO2023037180A1 PCT/IB2022/057438 IB2022057438W WO2023037180A1 WO 2023037180 A1 WO2023037180 A1 WO 2023037180A1 IB 2022057438 W IB2022057438 W IB 2022057438W WO 2023037180 A1 WO2023037180 A1 WO 2023037180A1
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- hydrocarbon mixture
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/02—Well-defined hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/02—Well-defined hydrocarbons
- C10M105/04—Well-defined hydrocarbons aliphatic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/36—Esters of polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/38—Esters of polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
- C10M107/10—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation containing aliphatic monomer having more than 4 carbon atoms
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/003—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/02—Well-defined aliphatic compounds
- C10M2203/0206—Well-defined aliphatic compounds used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
- C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
- C10M2207/2835—Esters of polyhydroxy compounds used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/285—Esters of aromatic polycarboxylic acids
- C10M2207/2855—Esters of aromatic polycarboxylic acids used as base material
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/017—Specific gravity or density
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/071—Branched chain compounds
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
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- 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
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- 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
- C10N2030/64—Environmental friendly compositions
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- 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
- C10N2030/74—Noack Volatility
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
Definitions
- a renewable based fluid for electric vehicles comprising high performance, hydrocarbon mixtures which possess unique compositional characteri tics and demonstrate improved electric drive efficiency.
- Base stocks are commonly used to produce various lubricants, including lubricating oils for automobiles, industrial oils, turbine oils, greases, metal working fluids, etc. They are also used as process oils, white oils, and heat transfer fluids. Finished lubricants generally consist of two components, base oils and additives. Base oil, which could be one or a mixture of base stocks, is the major constituent in these finished lubricants and contributes significantly to their performances, such as viscosity and viscosity index, volatility, stability, and low temperature performance. In general, a few base stocks are used to manufacture a wide variety of finished lubricants by varying the mixtures of individual base stocks and individual additives.
- the American Petroleum Institute categorizes base stocks in five groups based on their saturated hydrocarbon content, sulfur level, and viscosity index (Table 1 below).
- Group I, II, and III base stocks are mostly derived from crude oil via extensive processing, such as solvent refining for Group I, and hydroprocessing for Group II and Group III.
- Group III base stocks can also be produced from synthetic hydrocarbon liquids via a Gas-to-Liquids process (GTL), and are obtained from natural gas, coal or other fossil resources.
- Group IV base stocks, the polyalphaolefins (PAO) are produced by oligomerization of alpha olefins, such as 1 -decene.
- Group V base stocks include everything that does not belong to Groups I - IV, such as naphthenic base stocks, polyalkylene glycols (PAG), and esters. Most of the feedstocks for large-scale base stock manufacturing are nonrenewable.
- esters and some Group III hydrocarbon base stocks (US9862906B2) of renewable and biological origin have been used in applications such as refrigeration compressor lubricants, hydraulic oils and metal working fluids, and more recently in automotive and industrial lubricants (US20170240832A1).
- Common biological sources for hydrocarbons are natural oils, which can be derived from plant sources such as canola oil, castor oil, sunflower seed oil, rapeseed oil, peanut oil, soybean oil, and tall oil, or palm oil.
- Other commercial sources of hydrocarbons include engineered microorganisms such as Algae or Yeast.
- the present invention relates to a renewable and efficient e-Drive fluid that is based on (1) base oil described herein, (2)a highly branched isoparaffmic polyalphaolefin exhibiting a Kinematic Viscosity of about 2.5 cSt @ 100°C, 212°F as determined by ASTM D7042 or D445 and (3) an ester wherein the fluid demonstrates improved traction properties.
- the carbon atoms in the olefin feedstocks described herein may originate from renewable carbon sources.
- An embodiment of the invention relates to the fluid composition containing a base oil possessing a saturated hydrocarbon mixture with well-controlled structural characteristics that address the performance requirements driven by the stricter environmental and fuel economy regulations for automotive engine oils.
- the branching characteristics of the hydrocarbon molecules are controlled to consistently provide a composition that has a surprising CCS viscosity at -35°C (ASTM D5329) and Noack volatility (ASTM D5800) relationship.
- a further embodiment of the invention is that the fluid consists of a saturated hydrocarbon mixture having greater than 80% of the molecules with an even carbon number according to FIMS, with the mixture exhibiting a branching characteristic of BP/BI > -0.6037 (Internal alkyl branching per molecule) + 2.0, and when the hydrocarbon mixture is analyzed by carbon NMR as a whole, has on average at least 0.3 to 1.5 5+ methyl branches per molecule.
- Figure 1 illustrates the relationship between BP/BI and Internal Alkyl Branches per Molecule for various hydrocarbons, including low-viscosity PAO manufactured from 1- decene and 1 -dodecene, GTL base oils, and hydroisomerized hexadecene oligomers.
- Figure 2 illustrates the relationship between BP/BI and 5+ Methyl Branches per Molecule for various hydrocarbons, including low-viscosity PAO manufactured from 1- decene and 1 -dodecene, GTL base oils, and hydroisomerized hexadecene oligomers. It demonstrates that the 5+ Methyl Branches per Molecules for the hydrocarbon mixtures disclosed in this patent fall in a unique range of 0.3 - 1.5.
- Figure 3 illustrates the relationship between NOACK volatility and CCS at -35°C for various hydrocarbons, including low-viscosity PAO manufactured from 1 -decene and 1- dodecene, GTL base oils, Group III base oils, and hydroisomerized hexadecene oligomers.
- Figure 4 is an enlarged view of FIG. 3 in the range of 800 - 2,800 cP of CCS at - 35°C.
- Figure 5 is a graph of the efficiency differences of three candidates vs. commercial ATF (6.0 cSt) in Hub-Dyno Vehicle Tests.
- a fluid composition for electric vehicles comprising a renewable base oil as described herein, PAO 2.5 and ester.
- PAO 2.5 was used to lower the base oil viscosity so that we can achieve the finished fluid viscosity around 4.5 cSt at lOOoC.
- An ester was added to achieve lower traction value to achieve better frictional performance, thereby improving efficiency of e-Drives.
- the base oil component of the fluid composition herein referred to as hydrocarbon mixture is at 4 cSt.
- the hydrocarbon mixture is adjusted to 4 cSt via the other non-ester additives set forth herein.
- Electric drive or E-drive refers to reduction gear, motor, electronic control system and inverter components.
- Traction coefficient is a fluid property that relates to efficiency of a fluid when fluid is in a loaded zone. Fluids with low traction coefficients will improve efficiency as they require less energy to overcome adhesive and cohesive forces in a concentrated contact zone, thereby reducing oil temperatures.
- the resultant composition exhibits better film forming while providing traction lowering properties as demonstrated in situ with actual vehicle tests.
- NV Noack volatility
- Hydrocarbon mixture may be up to 75%, Ester up to 25% and PAO 2.5 cSt up to 25% wherein the resulting hydrocarbon mixture is 4 cSt.
- the PAO of 2.5 cSt as described herein has the properties of Density, lb/gal.: 6.723; Flash Point (COC), °C (°F): 180° (355°); Pour Point, °C (°F): -52° (-62°); Specific Gravity: 0.8064; Viscosity, Kinematic, 100°C, cSt:2.4; Viscosity, Kinematic, 40°C, cSt:8.3.
- the fluid composition as described herein may be used in e-Drive components comprising the electric motor- rolling bearings, brushes/slip rings; transmission-gears, dynamic seals; constant velocity joints; suspension-ball joints, shock absorbers; wheel bearings.
- a preferred embodiment is use of the fluids described herein as a cooling fluid for an electrical motor or a battery pack. In high-current situations, the electric motor and the battery pack of an electrically-powered vehicle or a hybrid vehicle can reach a high temperature if not properly cooled.
- the low-viscosity, high thermal conductivity of the fluid as described herein can provide excellent cooling efficacy for the electric motor and/or battery packs.
- the renewable base as disclosed herein is a saturated hydrocarbon mixture having a unique branching structure as characterized by NMRthat makes it suitable to be used as a high-quality synthetic base stock.
- Suitable base stocks are presented in U.S. 10,961,167 and U.S. 11,041,133 and herein incorporated by reference.
- the hydrocarbon mixture has outstanding properties including extremely low volatility, good low-temperature properties, etc., which are important performance attributes of high-quality base stocks. To be specific, the mixture comprises greater than 80% of the molecules with an even carbon number according to FIMS.
- the branching characteristics of the hydrocarbon mixture by NMR comprises a BP/BI in the range > -0.6037 (Internal alkyl branching per molecule) + 2.0.
- a saturated hydrocarbon with this unique branching structure exhibits a surprising cold crank simulated viscosity (CCS) vs. Noack volatility relationship that is beneficial for blending low-viscosity automotive engine oils.
- CCS cold crank simulated viscosity
- the hydrocarbon mixtures described herein are the product of oligomerization of olefins and a subsequent hydroisomerization.
- C14 to C20 olefins are oligomerized to form an oligomer distribution consisting of unreacted monomer, dimers (C28-C40), and trimers and higher oligomers (>C42).
- the unreacted monomers are distilled off for possible re-use in a subsequent oligomerization.
- the remaining oligomers are then hydroisomerized to achieve the final branching structures described herein which consistently impart a surprising cold crank simulated viscosity (CCS) vs. Noack volatility relationship.
- CCS cold crank simulated viscosity
- Viscosity is the physical property that measures the fluidity of the base stock.
- Viscosity is a strong function of temperature. Two commonly used viscosity measurements are dynamic viscosity and kinematic viscosity. Dynamic viscosity measures the fluid’s internal resistance to flow. Cold cranking simulator (CCS) viscosity at -35°C for engine oil is an example of dynamic viscosity measurements.
- the SI unit of dynamic viscosity is Pa-s. The traditional unit used is centipoise (cP), which is equal to 0.001 Pa-s (or 1 m Pa-s). The industry is slowly moving to SI units.
- Kinematic viscosity is the ratio of dynamic viscosity to density. The SI unit of kinematic viscosity is mm 2 /s.
- centistokes at 40°C (KV40) and 100°C (KV100) and Saybolt Universal Second (SUS) at 100°F and 210°F.
- 1 mm 2 /s equals 1 cSt.
- ASTM D5293 and D445 are the respective methods for CCS and kinematic viscosity measurements.
- Viscosity Index is an empirical number used to measure the change in the base stock’s kinematic viscosity as a function of temperature. The higher the VI, the less relative change is in viscosity with temperature. High VI base stocks are desired for most of the lubricant applications, especially in multigrade automotive engine oils and other automotive lubricants subject to large operating temperature variations. ASTM D2270 is a commonly accepted method to determine VI.
- pour point is the lowest temperature at which movement of the test specimen is observed. It is one of the most important properties for base stocks as most lubricants are designed to operate in the liquid phase. Uow pour point is usually desirable, especially in cold weather lubrication. ASTM D97 is the standard manual method to measure pour point. It is being gradually replaced by automatic methods, such as ASTM D5950 and ASTM D6749. ASTM D5950 with 1°C testing interval is used for pour point measurement for the examples in this patent.
- Boiling point distribution is the boiling point range that is defined by the True Boiling Points (TBP) at which 5% and 95% materials evaporates. It is measured by ASTM D2887 herein.
- Branching parameters measured by NMR spectroscopy for the hydrocarbon characterization include: [0033] Branching Index (BI): the percentage of methyl hydrogens appearing in the chemical shift range of 0.5 to 1.05 ppm among all hydrogens appearing in the 1H NMR chemical range 0.5 to 2.1 ppm in an isoparaffmic hydrocarbon.
- BI Branching Index
- Branching Proximity the percentage of recurring methylene carbons which are four or more number of carbon atoms removed from an end group or branch appearing at 13 C NMR chemical shift 29.8 ppm.
- Internal Alkyl Carbons is the number of methyl, ethyl, or propyl carbons which are three or more carbons removed from end methyl carbons, that includes 3 -methyl, 4-methyl, 5+ methyl, adjacent methyl, internal ethyl, n-propyl and unknown methyl appearing between 13 C NMR chemical shift 0.5 ppm and 22.0 ppm, except end methyl carbons appearing at 13.8 ppm.
- Methyl Carbons is the number of methyl carbons attached to a methine carbon which is more than four carbons away from an end carbon appearing at 13C NMR chemical shift 19.6 ppm in an average isoparaffmic molecule.
- the NMR spectra were acquired using Bruker AVANCE 500 spectrometer using a 5 mm BBI probe. Each sample was mixed 1 : 1 (wt:wt) with CDCh. The 3 H NMR was recorded at 500.11 MHz and using a 9.0 ps (30°) pulse applied at 4 s intervals with 64 scans co-added for each spectrum. The 13 C NMR was recorded at 125.75 MHz using a 7.0 ps pulse and with inverse gated decoupling, applied at 6 sec intervals with 4096 scans co-added for each spectrum. A small amount of 0.1 M Cr(acac)? was added as a relaxation agent and TMS was used as an internal standard.
- FIMS Analysis The hydrocarbon distribution of the current invention is determined by FIMS (field ionization mass spectroscopy). FIMS spectra were obtained on a Waters GCT-TOF mass spectrometer. The samples were introduced via a solid probe, which was heated from about 40°C to 500°C at a rate of 50°C per minute. The mass spectrometer was scanned from m/z 40 to m/z 1000 at a rate of 5 seconds per decade. The acquired mass spectra were summed to generate one averaged spectrum which provides carbon number distribution of paraffins and cycloparaffms containing up to six rings.
- the unique branching structure of the hydrocarbon mixtures disclosed herein are characterized by NMR parameters, such as BP, BI, internal alkyl branching, and 5+ methyls.
- BP/BI of the hydrocarbon mixtures are in the range of > -0.6037 (Internal alkyl branching per molecule) + 2.0.
- the 5+ methyls of the hydrocarbon mixtures average from 0.3 to 1.5 per molecule.
- the hydrocarbon mixture can be classified into two carbon ranges based on the carbon number distribution, C28 to C40 carbons, and greater than or equal to C42.
- each hydrocarbon mixture has carbon numbers within the specified range.
- Representative molecular structures for the C28 to C40 range can be proposed based on the NMR and FIMS analysis. Without wishing to be bound to any one particular theory, it is believed that the structures made by oligomerization and hydroisomerization of olefins has methyl, ethyl, butyl branches distributed throughout the structure and the branch index and branch proximity contribute to the surprisingly good low temperature properties of the product.
- Exemplary structures in the present hydrocarbon mixture are as follows:
- the unique branching structure and narrow carbon distribution of the hydrocarbon mixtures makes them suitable to be used as high-quality synthetic base oils, especially for low-viscosity engine oil applications.
- the hydrocarbon mixtures exhibit:
- KV100 in the range of 3.0 - 10.0 cSt
- KV100 in the range of 3.0 - 5.0 cSt, upon addition of polyalphaolephin and ester
- the Noack and CCS relationship for the hydrocarbon mixtures are shown in Figures 3 and 4.
- Hydrocarbon mixtures that are closer to the origin in figure 3 and 4 have been found more advantageous for low viscosity engine oils due to the low volatility and decreased viscosity at -35°C.
- a hydrocarbon mixture in accordance with the present invention with carbon numbers in the range of C28 to C40, and in another embodiment carbon numbers in the range of from C28 to C36, or in another embodiment molecules with a carbon number of C32, will generally exhibit the following characteristics in addition to the characteristics of BP/BI, Internal alkyl branches per molecule, 5+ methyl branches per molecule, and Noack/CCS relationship described above:
- the KV100 for the C28 - C40 hydrocarbon mixture ranges from 3.2 to 5.5 cSt; in another embodiment the KV100 ranges from 4.0 to 5.2 cSt; and from 4.1 to 4.5 c St in another embodiment.
- the VI for the C28-C40 hydrocarbon mixture ranges from 125 to 155 in one embodiment and from 135 to 145 in another embodiment.
- the Pour Point of the hydrocarbon mixture in one embodiment ranges from 25 to - 55°C and from 35 to -45°C in another embodiment.
- the boiling point range of the C28-C40 hydrocarbon mixture in one embodiment is no greater than 125°C (TBP at 95% - TBP at 5%) as measured by ASTM D2887; no greater than 100°C in another embodiment; no greater than 75°C in one embodiment; no greater than 50°C in another embodiment; and no greater than 30°C in one embodiment.
- those with a boiling point range no greater than 50 °C, and even more preferably no greater than 30°C give a surprisingly low Noack Volatility (ASTM D5800) for a given KV100.
- the C28 - C40 hydrocarbon mixture in one embodiment has a Branching Proximity (BP) in the range of 14-30 with a Branching Index (BI) in the range of 15 - 25; and in another embodiment a BP in the range of 15 - 28 and a BI in the range of 16 - 24.
- the Noack volatility (ASTM D5800) of the C28 - C40 hydrocarbon mixture is less than 16 wt% in one embodiment; less than 12 wt% in one embodiment; less than 10 wt% in one embodiment; less than 8 wt% in one embodiment and less than 7 wt% in one embodiment.
- the C28 - C40 hydrocarbon mixture in one embodiment also has a CCS viscosity at -35°C of less than 2700 cP; of less than 2000 cP in another embodiment; of less than 1700 cP in one embodiment; and less than 1500 cP in one embodiment.
- the hydrocarbon mixture with the carbon number range of C42 and greater will generally exhibit the following characteristics, in addition to the characteristics of BP/BI, internal alkyl branches per molecule, 5+ methyl branches per molecule, and Noack and CCS at -35°C relationship described above:
- the hydrocarbon mixture comprising C42 carbons or greater in one embodiment has a KV100 in the range of 8.0 to 10.0 cSt, and in another embodiment from 8.5 to 9.5 cSt.
- the VI of the hydrocarbon mixture having > 42 carbons is 140 - 170 in one embodiment; and, from 150 - 160 in another embodiment.
- the pour point in one embodiment ranges from -15 to -50°C; and, from -20 to -40°C in another embodiment.
- the hydrocarbon mixture comprising > 42 carbons has a BP in the range of 18 - 28 with a BI in the range of 17 - 23. In another embodiment, the hydrocarbon mixture has a BP in the range of 18 - 28 and a BI in the range of 17 - 23.
- Polyalphaolefins are produced by the polymerization of alphaolefins in the presence of a Friedel Crafts catalyst such as A1C13, BF3, or BF3 complexes.
- a Friedel Crafts catalyst such as A1C13, BF3, or BF3 complexes.
- 1 -octene, 1 -decene, and 1 -dodecene have been used to manufacture PAOs that have a wide range of viscosities, varying from low molecular weight and low viscosity of about 2 cSt at 100°C, to high molecular weight, viscous materials with viscosities exceeding 100 cSt at 100°C.
- the polymerization reaction is typically conducted in the absence of hydrogen; the lubricant range products are thereafter polished or hydrogenated to reduce the residual unsaturation.
- a preferred embodiment of the invention is the use of highly branched isoparaffinic polyalphaolefin exhibiting a Kinematic Viscosity of about 2.5 cSt @ 100°C, 212°F as determined by ASTM D7042 or D445 (such as SYNFLUID PAO 2.5).
- the PAO can be a dimer, a trimer, a tetramer, or any other oligomer or polymer comprising two or more structure units derived from one or more alpha-olefin monomer(s).
- the PAO molecule can be highly regio-regular, such that the bulk material exhibits an isotacticity, or a syndiotacticity when measured by Supl3/SupC NMR.
- the PAO molecule can be highly regio-irregular, such that the bulk material is substantially atactic when measured by Supl3/SupC NMR.
- a PAO material made by using a metallocene-based catalyst system is typically called a metallocene -PAO (“mPAO”), and a PAO material made by using traditional non-metallocene-based catalysts (e.g., Lewis acids, supported chromium oxide, and the like) is typically called a conventional PAO (“cPAO”).
- mPAO metallocene -PAO
- cPAO conventional PAO
- esters known to one of skill in the art of medium to high polarity including complex esters may be employed in the composition as described herein.
- a preferred embodiment is an ester selected from the group consisting of adipate, neopolyol, phthalate and trimellitate esters.
- the ester may comprise up to 25 wt% of the fluid composition.
- novel hydrocarbon mixtures disclosed herein can be synthesized via olefin oligomerization to achieve the desired carbon chain length, followed by hydroisomerization to improve their cold-flow properties, such as pour point and CCS, etc.
- olefins of C 14 to C20 in length are oligomerized using an acid catalyst to form an oligomer mixture.
- the olefins can be sourced from natural occurring molecules, such as crude oil or gas based olefins, or from ethylene polymerizations. In some variations, about 100% of the carbon atoms in the olefin feedstocks described herein may originate from renewable carbon sources.
- an alpha-olefin co-monomer may be produced by oligomerization of ethylene derived from dehydration of ethanol produced from a renewable carbon source.
- an alpha-olefin co-monomer may be produced by dehydration of a primary alcohol other than ethanol that is produced from a renewable carbon source. Said renewable alcohols can be dehydrated into olefins, using gamma alumina or sulfuric acid.
- modified or partially hydrogenated terpene feedstocks derived from renewable resources are coupled with one or more olefins that are derived from renewable resources.
- an olefin monomer between C14 to C20 is oligomerized in the presence of BFs and/or BFs promoted with a mixture of an alcohol and/or an ester, such as a linear alcohol and an alkyl acetate ester, using a continuously stirred tank reactor (CSTR) with an average residence time of 60 to 400 minutes.
- CSTR continuously stirred tank reactor
- the C 14 to C20 olefin monomers are oligomerized in the presence of BFs and/or promoted BFs using a continuously stirred tank reactor with an average residence time of 90 to 300 minutes.
- the C14 to C20 the olefin monomers are oligomerized in the presence of BFs and/or promoted BFs using a continuously stirred tank reactor with an average residence time of 120 to 240 minutes.
- the temperature of the oligomerization reaction may be in a range of from 10 °C to 90 °C. However, in one preferred embodiment, the temperature is maintained in the range of from 15 to 75 °C, and most preferably 20 °C to 40 °C, for the duration of the reaction.
- Suitable Lewis acids catalysts for the oligomerization process include metalloid halides and metal halides typically used as Friedel-Crafts catalysts, e.g., AlCh, BFs, BFs complexes, BCh, AlBrs, TiCh, TiCh, SnCh. and SbCh. Any of the metalloid halide or metal halide catalysts can be used with or without a co-catalyst protic promoter (e.g., water, alcohol, acid, or ester).
- a co-catalyst protic promoter e.g., water, alcohol, acid, or ester.
- the oligomerization catalyst is selected from the group consisting of zeolites, Friedel-Crafts catalysts, Bronsted acids, Lewis acids, acidic resins, acidic solid oxides, acidic silica aluminophosphates, Group IVB metal oxides, Group VB metal oxides, Group VIB metal oxides, hydroxide or free metal forms of Group VIII metals, and any combination thereof.
- the unsaturated oligomer product is distilled to remove the unreacted monomer.
- the unreacted monomer may be separated from the oligomer product, such as via distillation, and can be recycled back into the mixture of the first and/or second feedstocks for oligomerization thereof.
- the oligomer product is then hydroisomerized to provide the additional internal alkyl branches required to achieve the ideal branching characteristics.
- the whole oligomer product including both the dimers (C28 - C40) and heavier oligomers (>C42), are hydroisomerized prior to separation by distillation.
- the hydroisomerized product is then separated into the final hydrocarbon products by distillation.
- the dimers and heavier oligomers are fractionated and hydroisomerized separately.
- Hydroisomerization catalysts useful in the present invention usually comprises a shape-selective molecular sieve, a metal or metal mixture that is catalytically active for hydrogenation, and a refractory oxide support.
- Typical catalytically active hydrogenation metals include chromium, molybdenum, nickel, vanadium, cobalt, tungsten, zinc, platinum, and palladium. Platinum and palladium are especially preferred, with platinum mostly preferred. If platinum and/or palladium is used, the metal content is typically in the range of 0.1 to 5 weight percent of the total catalyst, usually from 0. 1 to 2 weight percent, and not to exceed 10 weight percent.
- Hydroisomerization catalysts are discussed, for example, in U.S. Patent Nos. 7,390,763 and 9,616,419, as well as U.S. Patent Application Publications 2011/0192766 and 2017/0183583.
- the conditions for hydroisomerization are tailored to achieve an isomerized hydrocarbon mixture with specific branching properties, as described above, and thus will depend on the characteristics of feed used.
- the reaction temperature is generally between about 200°C and 400°C, preferably between 260°C to 370°C, most preferably between 288°C to 345°C, at a liquid hourly space velocity (UHSV) generally between about 0.5 hr 1 and about 20 hr 1 .
- UHSV liquid hourly space velocity
- the pressure is typically from about 15 psig to about 2500 psig, preferably from about 50 psig to about 2000 psig, more preferably from about 100 psig to about 1500 psig.
- Uow pressure provides enhanced isomerization selectivity, which results in more isomerization and less cracking of the feed, thus leading to an increased yield.
- Hydrogen is present in the reaction zone during the hydroisomerization process, typically in a hydrogen to feed ratio from about 0.1 to 10 MSCF/bbl (thousand standard cubic feet per barrel), preferably from about 0.3 to about 5 MSCF/bbl. Hydrogen may be separated from the product and recycled to the reaction zone.
- an additional step of hydrogenation is added before the hydroisomerization to protect the downstream hydroisomerization catalyst.
- an additional step of hydrogenation or hydrofinishing is added after the hydroisomerization to further improve the saturation and stability of the hydrocarbon mixture.
- the hydroisomerized hydrocarbon mixtures are comprised of dimers having carbon numbers in the range of C28-C40, and a mixture of trimers+ having carbon numbers of C42 and greater.
- Each of the hydrocarbon mixtures will exhibit a BP/BI in the range of > -0.6037 (internal alkyl branching) ⁇ 2.0 per molecule, and, on average, from 0.3 to 1.5 methyl branches on the fifth or greater position per molecule.
- at least 80% of the molecules in each composition also have an even carbon number as determined by FIMS.
- each of the hydrocarbon compositions will also exhibit a Noack and CCS at - 35 °C relationship such that the Noack is between 2750 (CCS at-35 °C) ( '° 8) ⁇ 2. These characteristics allow for the formulation of low-viscosity engine oils as well as many other high-performance lubricant products.
- C16 olefins are used as the feed for the oligomerization reaction.
- the hydroisomerized dimer product When using C16 olefins as the feed, the hydroisomerized dimer product generally exhibits a KV100 of 4.3 cSt with ⁇ 8% Noack loss and a CCS at -35°C of approximately 1,700 cP.
- the extremely low Noack volatility is due to the high starting boiling point and narrow boiling point distribution when compared other 3.9 to 4.4 cSt synthetic base stocks. This makes it ideal for use in low viscosity engine oils with strict volatility requirements.
- the excellent CCS and pour point characteristics are due to the branching characteristics discussed above.
- the material has a pour point of ⁇ -40 °C. This is required to pass critical engine oil formulation requirements for 0W formulations, including Mini-Rotary Viscosity (ASTM D4684) and Scanning Brookfield Viscosity (ASTM D2983) specifications.
- lubricant compositions comprising a hydrocarbon mixture described herein.
- the lubricant compositions comprise a base oil comprising at least a portion of a hydrocarbon mixture produced by any of the methods described herein, and one or more additives selected from the group of antioxidants, viscosity modifiers, pour point depressants, foam inhibitors, detergents, dispersants, dyes, markers, rust inhibitors or other corrosion inhibitors, antiwear agents, friction modifiers, thermal stability improvers, multifunctional additives (e.g., an additive that functions as both an antioxidant and a dispersant) or any combination thereof.
- Lubricant compositions may comprise hydrocarbon mixtures described herein and any lubricant additive, combination of lubricant additives, or available additive package.
- any of the compositions described herein that are used as a base stock may be present at greater than about 1% based on the total weight of a finished lubricant composition.
- the amount of the base stock in the formulation is greater than about 2, 5, 15 or 20 wt% based on the total weight of the formulation.
- the amount of the base oil in the composition is from about 1-99%, from about 1-80%, from about 1-70%, from about 1-60%, from about 1-50%, from about 1-40%, from about 1-30%, from about 1-20%, or from about 1-10% based on the total weight of the composition.
- the amount of base stock in formulations provided herein is about 1%, 5%, 7%, 10%, 13%, 15%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or 99% based on total weight of the formulation.
- lubricant additives are selected in combination with a base oil so that the finished lubricant composition meets certain industry standards or specifications for specific applications.
- concentration of each of the additives in the composition when used, may range from about 0.001 wt.% to about 20 wt.%, from about 0.01 wt.% to about 10 wt.%, from about 0. 1 wt.% to about 5 wt.% or from about 0.1 wt.% to about 2.5 wt.%, based on the total weight of the composition.
- the total amount of the additives in the composition may range from about 0.001 wt.% to about 50 wt.%, from about 0.01 wt% to about 40 wt%, from about 0.01 wt% to about 30 wt%, from about 0.01 wt.% to about 20 wt.%), from about 0.1 wt.% to about 10 wt.%, or from about 0.1 wt.% to about 5 wt.%, based on the total weight of the composition.
- the dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MRE structure type catalyst bound with alumina.
- the reaction was carried out in a fixed bed reactor at 500 psig and 307°C. Cracked molecules were separated from the hydroisomerized C16 dimer using an online stripper.
- Example 1 The oligomerization and subsequent distillation were performed identically to Example 1.
- the dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MRE structure type catalyst bound with alumina.
- the reaction was carried out in a fix bed reactor at 500 psig and 313°C. Cracked molecules were separated from the hydroisomerized C16 dimers using an online stripper.
- Example 2 The oligomerization and subsequent distillation were performed identically to Example 1.
- the dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MRE structure type catalyst bound with alumina.
- the reaction was carried out in a fix bed reactor at 500 psig and 324 °C. Cracked molecules were separated from the hydroisomerized C16 dimers using an online stripper.
- Example 2 The oligomerization and subsequent distillation were performed identically to Example 1.
- the dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MTT structure type catalyst bound with alumina.
- the reaction was carried out in a fix bed reactor at 500 psig and 316 °C. Cracked molecules were separated from the hydroisomerized C16 dimers using an online stripper.
- Example 6 The oligomerization and subsequent distillation were performed identically to Example 1. The dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MTT structure type catalyst bound with alumina. The reaction was carried out in a fix bed reactor at 500 psig and 321 °C. Cracked molecules were separated from the hydroisomerized C16 dimers using an online stripper.
- Example 6
- Example 2 The oligomerization and subsequent distillation were performed identically to Example 1.
- the dimers were then hydroisomerized with a noble-metal impregnated aluminoslicate of MTT structure type catalyst bound with alumina.
- the reaction was carried out in a fix bed reactor at 500 psig and 332 °C. Cracked molecules were separated from the hydroisomerized C16 dimers using an online stripper.
- trimer and higher oligomers (trimer+) cut was then hydroisomerized with a noble-metal impregnated aluminoslicate of MRE structure type catalyst bound with alumina.
- the reaction was carried out in a fixed bed reactor at 500 psig and 313 °C. Cracked molecules were separated from the hydroisomerized C16 trimer+ using an online stripper.
- Example 10 The oligomerization and subsequent distillations were performed identically to Example 7.
- the trimer+ cut was then hydroisomerized with a noble-metal impregnated aluminoslicate of MRE structure type catalyst bound with alumina.
- the reaction was carried out in a fix bed reactor at 500 psig and 324 °C. Cracked molecules were separated from the hydroisomerized C16 trimer+ using an online stripper.
- Figure 1 illustrates the relationship between BP/BI and Internal Alkyl Branches per Molecule for the various hydrocarbon mixtures.
- the straight line in the plot depicts the equation of BP/BI -0.6037 (Internal alkyl branching per molecule) + 2.0. All of the hydrocarbon mixtures of the present invention are above the line. While a few of the prior art hydrocarbon mixtures are also above the line, they do not meet other important characteristics of the present hydrocarbon mixtures, as shown in Figures 2 - 4.
- Figure 2 illustrates the relationship between BP/BI and 5+ Methyl Branches per Molecule for the various hydrocarbon mixtures. It demonstrates that the 5+ Methyl Branches per Molecules for the present hydrocarbon mixtures fall in a unique range of 0.3 - 1.5. All of the prior art mixtures fall outside the range.
- Figures 3 and 4 illustrate the relationship between NOACK volatility and CCS at -35 °C for the various hydrocarbon mixtures.
- Figure 4 is an enlarged view of Figure 3 in the range of 800 - 2,800 cP of CCS at -35 °C.
- a preferable base stock will fall as close as possible to the origin of Figures 3 and 4, as a lower Noack volatility for a given CCS viscosity at -35 °C is ideal for modem engine oil formulations such as 0W-20 through 0W-8 formulations.
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Abstract
Description
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CA3231730A CA3231730A1 (en) | 2021-09-09 | 2022-08-10 | Renewable based e-drive fluids |
KR1020247011241A KR20240056569A (en) | 2021-09-09 | 2022-08-10 | Renewable-based E-Drive Fluids |
CN202280066836.4A CN118055998A (en) | 2021-09-09 | 2022-08-10 | Renewable base electronically driven fluid |
EP22761612.5A EP4399267A1 (en) | 2021-09-09 | 2022-08-10 | Renewable based e-drive fluids |
AU2022342402A AU2022342402A1 (en) | 2021-09-09 | 2022-08-10 | Renewable based e-drive fluids |
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