CN112342071A - Base oil composition with high HTHS performance and preparation method thereof - Google Patents
Base oil composition with high HTHS performance and preparation method thereof Download PDFInfo
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- CN112342071A CN112342071A CN202011155492.3A CN202011155492A CN112342071A CN 112342071 A CN112342071 A CN 112342071A CN 202011155492 A CN202011155492 A CN 202011155492A CN 112342071 A CN112342071 A CN 112342071A
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- 239000002199 base oil Substances 0.000 title claims abstract description 99
- 239000000203 mixture Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 24
- 229920001577 copolymer Polymers 0.000 claims abstract description 24
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 24
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 18
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 13
- 239000003599 detergent Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 229930195734 saturated hydrocarbon Natural products 0.000 claims abstract description 11
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 26
- 230000018044 dehydration Effects 0.000 claims description 23
- 238000006297 dehydration reaction Methods 0.000 claims description 23
- 229960002317 succinimide Drugs 0.000 claims description 17
- 229920002367 Polyisobutene Polymers 0.000 claims description 14
- 229920000193 polymethacrylate Polymers 0.000 claims description 10
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 238000005984 hydrogenation reaction Methods 0.000 claims description 6
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 3
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 229940077388 benzenesulfonate Drugs 0.000 claims description 3
- -1 calcium alkyl benzene Chemical class 0.000 claims description 3
- 229920013639 polyalphaolefin Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 21
- 239000010705 motor oil Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 239000010687 lubricating oil Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 7
- 238000011282 treatment Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—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
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
-
- 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
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
-
- 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/086—Imides [having hydrocarbon substituents containing less than thirty carbon atoms]
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
- C10M2215/28—Amides; Imides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention belongs to the technical field of petrochemical industry, and particularly relates to a base oil composition with high HTHS (high-temperature high-hydrogen HS) performance and a preparation method thereof. The present invention provides a base oil composition comprising: 50-100 parts of Fischer-Tropsch synthesis base oil; 0-30 parts of group III hydrogenated base oil; 1-10 parts of an olefin copolymer; 1-10 parts of a detergent dispersant; 0.1-0.5 part of pour point depressant; the kinematic viscosity at 100 ℃ of the Fischer-Tropsch synthesis base oil is 11-13.5 mm2The viscosity index is more than or equal to 145, the pour point is less than or equal to minus 45 ℃, and the saturated hydrocarbon containsThe amount is more than or equal to 99 wt%; the olefin copolymer is selected from one or more of ethylene-propylene copolymer, hydrogenated styrene-butadiene copolymer and hydrogenated styrene-isoprene copolymer. The Fischer-Tropsch synthesis base oil with a special chemical structure is matched with the low-content olefin copolymer type sticking agent, so that the high-temperature high-shear viscosity (HTHS) of the base oil composition is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry, and particularly relates to a base oil composition with high HTHS (high-temperature high-hydrogen HS) performance and a preparation method thereof.
Background
The High Temperature High shear viscosity (HTHS) is an index of viscosity stability of engine lubricating oil under High Temperature and High shear, and reflects the oil film strength retention capacity of the engine oil under High Temperature and High shear conditions, and the larger the index value is, the better the High Temperature and High speed resistance of the engine oil is. The normal working temperature of the engine is high, at the moment, an oil film between the friction pairs is thin, the shearing pressure of a piston ring on a cylinder wall is extremely high, in addition, the high-speed running is adopted, serious boundary friction is easy to occur, if the oil film is broken due to insufficient strength, the sealing performance of the interior of the cylinder caused by the aggravation of abrasion is reduced, engine oil can be overflowed to a combustion chamber to be burnt, and the problem of engine oil burning is caused. For some automobile engines or general aviation piston engines with long service lives and after overhaul, because the fit clearance between the piston and the cylinder wall is larger, the engine oil is more easily burnt, and the engine oil with higher HTHS is selected as an effective solution for preventing the engine oil burning fault. Therefore, it is necessary to develop an engine oil having excellent HTHS performance.
Disclosure of Invention
In view of the above, the present invention aims to provide a base oil composition with high HTHS performance and a preparation method thereof, and the base oil composition provided by the present invention has excellent high temperature resistance and shear resistance, can provide sufficient oil film strength under the conditions of high temperature and high rotation speed of an engine, is beneficial to inhibiting the conventional engine oil burning problem, can meet the engine application occasions with special internal structures (the fit clearance between a piston and a cylinder wall is large), and has a wide market application prospect.
The invention provides a base oil composition with high HTHS performance, which comprises the following components in parts by weight:
the kinematic viscosity at 100 ℃ of the Fischer-Tropsch synthesis base oil is 11-13.5 mm2The viscosity index is more than or equal to 145, the pour point is less than or equal to minus 45 ℃, and the content of saturated hydrocarbon is more than or equal to 99 wt%;
the olefin copolymer is selected from one or more of ethylene-propylene copolymer, hydrogenated styrene-butadiene copolymer and hydrogenated styrene-isoprene copolymer.
Preferably, the kinematic viscosity of the III-class hydrogenated base oil at 100 ℃ is 4-10 mm2The viscosity index is 120-130, the pour point is-15 to-20 ℃, and the content of saturated hydrocarbon is 95-99.5 wt%.
Preferably, the detergent dispersant is one selected from calcium alkyl benzene sulfonate, calcium alkyl phenol, succinimide, polyisobutylene mono-succinimide and polyisobutylene di-succinimide.
Preferably, the pour point depressant is selected from one or more of polymethacrylates, polyacrylates, acrylic styrene copolymers, styrene maleic anhydride copolymers, alkylated polystyrenes, and poly-alpha-olefins.
Preferably, the hydrogenated styrene-isoprene copolymer has the designation SV 261.
Preferably, the base oil composition comprises, in parts by weight:
the invention provides a preparation method of a base oil composition with high HTHS performance, which comprises the following steps:
mixing Fischer-Tropsch synthesis base oil, III type hydrogenation base oil, olefin copolymer, detergent dispersant and pour point depressant to obtain the base oil composition.
Preferably, the mixing process specifically includes:
a) mixing Fischer-Tropsch synthesis base oil and III type hydrogenation base oil, and dehydrating under vacuum to obtain a dehydrated mixture;
b) and mixing the dehydrated mixture, the olefin copolymer, the detergent dispersant and the pour point depressant to obtain the base oil composition.
Preferably, in the step a), the pressure of the dehydration is less than-0.1 MPa, the temperature of the dehydration is 80-90 ℃, and the time of the dehydration is 0.5-2 h.
Preferably, in the step b), the mixing temperature is 50-60 ℃; the mixing time is 0.5-2 h.
Compared with the prior art, the invention provides the base oil composition with high HTHS performance and the preparation method thereof. The invention provides a base oil composition which comprises the following components in parts by weight: 50-100 parts of Fischer-Tropsch synthesis base oil; 0-30 parts of group III hydrogenated base oil; 1-10 parts of an olefin copolymer; 1-10 parts of a detergent dispersant; 0.1-0.5 part of pour point depressant; the kinematic viscosity at 100 ℃ of the Fischer-Tropsch synthesis base oil is 11-13.5 mm2The viscosity index is more than or equal to 145, the pour point is less than or equal to minus 45 ℃, and the content of saturated hydrocarbon is more than or equal to 99 wt%; the olefin copolymer is selected from one or more of ethylene-propylene copolymer, hydrogenated styrene-butadiene copolymer and hydrogenated styrene-isoprene copolymer. The Fischer-Tropsch synthesis base oil with a special chemical structure is matched with the low-content olefin copolymer type sticking agent, so that the high-temperature high-shear viscosity (HTHS) of the base oil composition is remarkably improved. Experimental results show that on the basis of meeting the performances of SAE15W-50 engine oil, such as 100-DEG C kinematic viscosity, low-temperature dynamic viscosity and low-temperature pumping viscosity, the HTHS can reach above 4.8mPa.s, and the base oil composition has excellent high-temperature resistance and shear resistance, can provide sufficient oil film strength under the conditions of high temperature and high rotating speed of an engine, is beneficial to inhibiting the engine oil burning problem of a conventional engine, can meet the engine application occasions of special internal structures (large fit clearance between a piston and a cylinder wall), and has wide market application prospects.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a base oil composition with high HTHS performance, which comprises the following components in percentage by weight:
in the base oil composition provided by the invention, the Fischer-Tropsch synthesis base oil is high-viscosity base oil prepared by taking coal or natural gas as a raw material through a Fischer-Tropsch synthesis method, and the kinematic viscosity of the Fischer-Tropsch synthesis base oil at 100 ℃ is preferably 11-13.5 mm2S; the viscosity index of the Fischer-Tropsch synthesis base oil is preferably more than or equal to 145, and can be 145, 146, 147, 148, 149 or 150; the pour point of the Fischer-Tropsch synthesis base oil is preferably less than or equal to-45 ℃, and specifically can be at-45 ℃, 46 ℃, 47 ℃, 48 ℃, 49 ℃ or-50 ℃; the content of saturated hydrocarbon of the Fischer-Tropsch synthesis base oil is preferably more than or equal to 99 wt%, and more preferably more than or equal to 99.9 wt%; the content of the Fischer-Tropsch synthesis base oil in the base oil composition is 50-100 parts by weight, and specifically may be 50 parts by weight, 52 parts by weight, 55 parts by weight, 57 parts by weight, 60 parts by weight, 62 parts by weight, 65 parts by weight, 65.8 parts by weight, 67 parts by weight, 70 parts by weight, 72 parts by weight, 75 parts by weight, 77 parts by weight, 80 parts by weight, 82 parts by weight, 85 parts by weight, 87 parts by weight, 90 parts by weight, 92 parts by weight, 95 parts by weight, 97 parts by weight, or 100 parts by weight.
In the base oil composition provided by the invention, the III-type hydrogenated base oil is base oil obtained by hydrofining mineral oil, and the kinematic viscosity of the III-type hydrogenated base oil at 100 ℃ is preferably 4-10 mm2A specific value of 4 mm/s2/s、4.5mm2/s、5mm2/s、5.5mm2/s、6mm2/s、6.5mm2/s、7mm2/s、7.5mm2/s、8mm2/s、8.5mm2/s、9mm2/s、9.5mm2S or 10mm2S; the preferable viscosity index of the III-class hydrogenated base oil is 120-130, and the viscosity index can be 120, 121, 122, 123, 124, 125126, 127, 128, 129, or 130; the pour point of the III-type hydrogenated base oil is-15 to-20 ℃, and specifically can be-15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃ or-20 ℃; the content of saturated hydrocarbon of the III-type hydrogenated base oil is preferably 95-99.5 wt%, and specifically can be 95 wt%, 95.5 wt%, 96 wt%, 96.5 wt%, 97 wt%, 97.5 wt%, 98 wt%, 98.5 wt%, 99 wt% or 99.5 wt%; the content of the group III hydrogenated base oil in the base oil composition is 0-30 parts by weight, and specifically may be 1 part by weight, 2 parts by weight, 5 parts by weight, 7 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, 17 parts by weight, 20 parts by weight, 22 parts by weight, 25 parts by weight, 27 parts by weight or 30 parts by weight.
In the base oil composition provided by the present invention, the olefin copolymer is selected from one or more of an ethylene-propylene copolymer, a hydrogenated styrene-butadiene copolymer and a hydrogenated styrene-isoprene copolymer, the hydrogenated styrene-isoprene copolymer having a trade name of SV261, the trade name of the hydrogenated styrene-isoprene copolymer being preferably provided by infinium corporation; the content of the olefin copolymer in the base oil composition is 1 to 10 parts by weight, and specifically may be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, or 10 parts by weight.
In the base oil composition provided by the invention, the detergent dispersant is preferably one selected from calcium alkyl benzene sulfonate, calcium alkyl phenol, succinimide, polyisobutylene mono-succinimide and polyisobutylene di-succinimide; the polyisobutylene bis-succinimide is preferably provided under the designation T154, which is preferably provided by tin-free southern lubricating oil additives limited; the content of the detergent dispersant in the base oil composition is 1 to 10 parts by weight, and specifically may be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, or 10 parts by weight.
In the base oil composition provided by the present invention, the pour point depressant is preferably selected from one or more of a polymethacrylic acid ester, a polyacrylic acid ester, an acrylic styrene copolymer, a styrene maleic anhydride copolymer, an alkylated polystyrene, and a poly-alpha olefin; the polymethacrylate is preferably available under the designation viscoplex1-300, which is preferably available from Evonik corporation; the content of the pour point depressant in the base oil composition is 0.1 to 0.5 part by weight, and specifically may be 0.1 part by weight, 0.15 part by weight, 0.2 part by weight, 0.25 part by weight, 0.3 part by weight, 0.35 part by weight, 0.4 part by weight, 0.45 part by weight, or 0.5 part by weight.
The invention also provides a preparation method of the base oil composition with high HTHS performance, which comprises the following steps:
mixing Fischer-Tropsch synthesis base oil, III type hydrogenation base oil, olefin copolymer, detergent dispersant and pour point depressant to obtain the base oil composition.
In the preparation method provided by the invention, the Fischer-Tropsch synthesis base oil, the III type hydrogenated base oil, the olefin copolymer, the detergent dispersant and the pour point depressant are uniformly mixed according to the mass ratio to obtain the base oil composition provided by the invention. Wherein, the mixing process specifically comprises: a) mixing Fischer-Tropsch synthesis base oil and III type hydrogenation base oil, and dehydrating under vacuum to obtain a dehydrated mixture; b) and mixing the dehydrated mixture, the olefin copolymer, the detergent dispersant and the pour point depressant to obtain the base oil composition.
In the above mixing process provided by the present invention, in step a), the pressure of dehydration is preferably less than-0.1 MPa, and specifically may be-0.08 MPa, the temperature of dehydration is preferably 80 to 90 ℃, and specifically may be 80 ℃, 82 ℃, 85 ℃, 87 ℃ or 90 ℃, and the time of dehydration is preferably 0.5 to 2 hours, and specifically may be 0.5 hour, 1 hour, 1.5 hours or 2 hours; in the step b), the mixing temperature is preferably 50-60 ℃, and specifically can be 50 ℃, 52 ℃, 55 ℃, 57 ℃ or 60 ℃; the mixing time is preferably 0.5-2 h, and specifically can be 0.5h, 1h, 1.5h or 2 h.
The Fischer-Tropsch synthesis base oil with a special chemical structure is matched with the low-content olefin copolymer type sticking agent, so that the high-temperature high-shear viscosity (HTHS) of the base oil composition is remarkably improved. Experimental results show that on the basis of meeting the performances of SAE15W-50 engine oil, such as 100-DEG C kinematic viscosity, low-temperature dynamic viscosity and low-temperature pumping viscosity, the HTHS can reach above 4.8mPa.s, and the base oil composition has excellent high-temperature resistance and shear resistance, can provide sufficient oil film strength under the conditions of high temperature and high rotating speed of an engine, is beneficial to inhibiting the engine oil burning problem of a conventional engine, can meet the engine application occasions of special internal structures (large fit clearance between a piston and a cylinder wall), and has wide market application prospects.
For the sake of clarity, the following examples are given in detail.
Example 1
Weighing Fischer-Tropsch synthesis base oil (the kinematic viscosity at 100 ℃ is 11-13.5 mm)287kg of unsaturated hydrocarbon with the viscosity index of 146, the pour point of-47 ℃ and the content of saturated hydrocarbon of more than or equal to 99.9 wt%) is added into a blending kettle, the vacuum is started to keep the pressure in the kettle at-0.08 MPa, the stirring is started, the temperature is raised to 80-90 ℃ for dehydration for 1h, the vacuum is closed after the dehydration is finished, the temperature is cooled to 55 ℃, 5kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis-succinimide (tin-free southern lubricating oil additive Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300) are sequentially added, the temperature is kept at 50-60 ℃ for stirring for 1h, the heating and the stirring are stopped, the mixture is naturally cooled to the room temperature, and post-treatment such as filtration and packaging is.
Example 2
Weighing Fischer-Tropsch synthesis base oil (the kinematic viscosity at 100 ℃ is 11-13.5 mm)265.8kg of group III hydrogenated base oil (with a kinematic viscosity of 9.5mm at 100 ℃), a viscosity index of 146, a pour point of-47 ℃, and a saturated hydrocarbon content of more than or equal to 99.9 wt.%)220 kg/s, viscosity index 126, pour point-18 ℃ and saturated hydrocarbon content 97.5 wt%) is added into a blending kettle, vacuum is started to keep the pressure in the kettle to be-0.08 MPa, stirring is started, the temperature is raised to 80-90 ℃ for dehydration for 1h, vacuum is closed after dehydration is finished, and cooling is carried outCooling to 55 ℃, sequentially adding 6kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis-succinimide (tin-free southern lubricating oil additive Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300), keeping the temperature at 50-60 ℃, stirring for 1h, stopping heating and stirring, naturally cooling to room temperature, filtering, packaging and other post-treatments.
Comparative example 1
Weighing 25kg of 600N hydrogenated base oil and 60kg of PAO10 base oil, adding the mixture into a blending kettle, starting vacuum to keep the pressure in the kettle at-0.08 MPa, starting stirring, heating to 80-90 ℃ for dehydration for 1h, closing the vacuum after dehydration, cooling to 55 ℃, sequentially adding 7kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis (succinimide) (Tannless southern lubricating oil additives Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300), stirring for 1h at constant temperature of 50-60 ℃, stopping heating and stirring, naturally cooling to room temperature, and performing post-treatment such as filtration and packaging.
Comparative example 2
42kg of HVIII +10 hydrogenated base oil and 42.5kg of PAO10 base oil are weighed and added into a blending kettle, the vacuum is started to keep the pressure in the kettle to be 0.08MPa, the stirring is started, the temperature is increased to 80-90 ℃ for dehydration for 1h, the vacuum is closed after the dehydration is finished, the temperature is cooled to 55 ℃, 7.5kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis-succinimide (tin-free southern lubricating oil additive limited company, T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300) are sequentially added, the temperature is kept at 50-60 ℃ for stirring for 1h, the heating and the stirring are stopped, the mixture is naturally cooled to the room temperature, and the post-treatment such as filtration and packaging is carried out.
Comparative example 3
Weighing 36.6kg of Ultra-S8 hydrogenated base oil and 47.4kg of PAO10 base oil, adding into a blending kettle, starting vacuum to keep the pressure in the kettle at-0.08 MPa, starting stirring, heating to 80-90 ℃ for dehydration for 1h, closing vacuum after dehydration, cooling to 55 ℃, sequentially adding 8kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis (succinimide) (Tansylless southern lubricating oil additives Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300), stirring for 1h at constant temperature of 50-60 ℃, stopping heating and stirring, naturally cooling to room temperature, and carrying out post-treatment such as filtration and packaging.
Comparative example 4
Weighing 84.5kg of PAO10 base oil, adding the base oil into a blending kettle, starting vacuum to keep the pressure in the kettle at-0.08 MPa, starting stirring, heating to 80-90 ℃ for dehydration for 1h, closing vacuum after dehydration, cooling to 55 ℃, sequentially adding 7.5kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis-succinimide (tin-free southern lubricating oil additive Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300), stirring for 1h at constant temperature of 50-60 ℃, stopping heating and stirring, naturally cooling to room temperature, filtering, packaging and other post-treatments.
Comparative example 5
Weighing 80.5kg of PAO8 base oil, adding the base oil into a blending kettle, starting vacuum to keep the pressure in the kettle at-0.08 MPa, starting stirring, heating to 80-90 ℃ for dehydration for 1h, closing vacuum after dehydration, cooling to 55 ℃, sequentially adding 11.5kg of hydrogenated styrene-isoprene copolymer (Infineum, SV261), 4kg of polyisobutylene bis-succinimide (tin-free southern lubricating oil additive Co., Ltd., T154) and 0.2kg of polymethacrylate (Evonik, Viscoplex1-300), stirring for 1h at constant temperature of 50-60 ℃, stopping heating and stirring, naturally cooling to room temperature, filtering, packaging and other post-treatments.
Results of Performance testing
The base oil compositions obtained in examples 1 to 2 and comparative examples 1 to 5 were subjected to performance tests, and the results are shown in Table 1.
Table 1 performance test data for base oil compositions
For SAE15W-50 engine oil with the same viscosity grade, the high-temperature high-shear viscosity of comparative examples 1-5 is below 4.5 mPas, and the high-temperature high-shear viscosity of examples 1-2 is above 4.8 mPas, so that the engine oil has more excellent high-temperature and shear resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high HTHS performance base oil composition comprising, in parts by weight:
the kinematic viscosity at 100 ℃ of the Fischer-Tropsch synthesis base oil is 11-13.5 mm2The viscosity index is more than or equal to 145, the pour point is less than or equal to minus 45 ℃, and the content of saturated hydrocarbon is more than or equal to 99 wt%;
the olefin copolymer is selected from one or more of ethylene-propylene copolymer, hydrogenated styrene-butadiene copolymer and hydrogenated styrene-isoprene copolymer.
2. The base oil composition according to claim 1, wherein the group III hydrogenated base oil has a kinematic viscosity at 100 ℃ of 4 to 10mm2The viscosity index is 120-130, the pour point is-15 to-20 ℃, and the content of saturated hydrocarbon is 95-99.5 wt%.
3. The base oil composition of claim 1 wherein the detergent dispersant is selected from one of calcium alkyl benzene sulfonate, calcium alkyl phenate, succinimide, polyisobutylene mono-succinimide, and polyisobutylene bis-succinimide.
4. The base oil composition according to claim 1, wherein the pour point depressant is selected from one or more of polymethacrylates, polyacrylates, acrylic styrene copolymers, styrene maleic anhydride copolymers, alkylated polystyrenes, and poly-alpha olefins.
5. The base oil composition as claimed in claim 1, wherein the hydrogenated styrene-isoprene copolymer has a designation SV 261.
6. The base oil composition as claimed in claim 1, comprising, in parts by weight:
7. a method of making a high HTHS performance base oil composition according to any of claims 1 to 6, comprising the steps of:
mixing Fischer-Tropsch synthesis base oil, III type hydrogenation base oil, olefin copolymer, detergent dispersant and pour point depressant to obtain the base oil composition.
8. The method according to claim 7, wherein the mixing process comprises:
a) mixing Fischer-Tropsch synthesis base oil and III type hydrogenation base oil, and dehydrating under vacuum to obtain a dehydrated mixture;
b) and mixing the dehydrated mixture, the olefin copolymer, the detergent dispersant and the pour point depressant to obtain the base oil composition.
9. The method for preparing the compound of claim 8, wherein the pressure of the dehydration in the step a) is less than-0.1 MPa, the temperature of the dehydration is 80-90 ℃, and the time of the dehydration is 0.5-2 h.
10. The method according to claim 8, wherein the mixing temperature in step b) is 50 to 60 ℃; the mixing time is 0.5-2 h.
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