WO2002100986A1 - Additif de deparaffinage et procede de deparaffinage - Google Patents

Additif de deparaffinage et procede de deparaffinage Download PDF

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Publication number
WO2002100986A1
WO2002100986A1 PCT/JP2002/005643 JP0205643W WO02100986A1 WO 2002100986 A1 WO2002100986 A1 WO 2002100986A1 JP 0205643 W JP0205643 W JP 0205643W WO 02100986 A1 WO02100986 A1 WO 02100986A1
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Prior art keywords
mineral oil
dewaxing
polymer
weight
alkyl
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PCT/JP2002/005643
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English (en)
Japanese (ja)
Inventor
Kenichi Hasegawa
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Sanyo Chemical Industries, Ltd.
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Priority claimed from JP2001175105A external-priority patent/JP3920594B2/ja
Application filed by Sanyo Chemical Industries, Ltd. filed Critical Sanyo Chemical Industries, Ltd.
Publication of WO2002100986A1 publication Critical patent/WO2002100986A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
    • C10G73/02—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils
    • C10G73/04—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils with the use of filter aids

Definitions

  • the present invention relates to a dewaxing additive, a mineral oil composition and a dewaxing method.
  • the present invention relates to an oil composition and a dewaxing method.
  • Mineral oil contains wax components, and if it contains wax, it has a high pour point and cannot be used as such as lubricating oil. For this reason, conventionally, mineral oil has been used in which a solvent and, if necessary, a dewaxing additive are added, mixed, and cooled to precipitate a wax component and filter to remove the wax.
  • Conventional mineral oil dewaxing additives include a combination of a polymer of alkyl (C 10-26) acrylate and a polymer of linear alkyl (C 10- 20) methacrylate (US Pat. 4, 45 1, 35 3 specification)
  • alkyl (C10-26) represents an alkyl group having 10-26 carbon atoms, and the same expression will be used hereinafter.
  • a combination of a linear tetracosylmethacrylate polymer and an alkyl (C8-20) (meth) acrylate polymer (US Pat. No. 4,728,414), an alkyl (C10-40)
  • a combination of an acrylate polymer and an alkyl (Cl-40) methacrylate polymer containing 10% by weight or more of branches (US Pat. No. 5,098,550) has been proposed. I don't need these All of them had insufficient filterability.
  • An object of the present invention is to provide a dewaxing additive having an excellent filterability improving action.
  • Still another object of the present invention is to provide a mineral oil composition having improved filterability.
  • Still another object of the present invention is to provide a method for dewaxing mineral oil with improved filterability.
  • the total amount of the alkyl (Cl-16) methacrylate (a) and the alkyl (C18-22) acrylate (b) is 80% by weight of all the constituent monomers. %,
  • the weight ratio of (a) / (b) is 5/9, 5 to 80/20, and has a crystallization onset temperature of 20 to 50 ° C (hereinafter abbreviated as Tc). It consists of a polymer (A).
  • the mineral oil composition of the present invention comprises a wax-containing mineral oil, a dewaxing additive comprising the polymer (A), and a solvent (S).
  • the mineral oil composition of the present invention is dissolved at 30 ° C. or higher, the obtained solution is cooled to ⁇ 10 ° C. or lower, and the cooled product is filtered and dewaxed. It consists of separating wax from mineral oil.
  • the polymer (A) used in the present invention generally has a temperature of 20 to 50 ° C, preferably 25 to 50 ° C, more preferably 30 to 50 ° C, and particularly preferably 35 to 50 ° C. ⁇ Has Tc measured by scanning calorimeter.
  • a polymer having a Tc lower than 20 ° C or higher than 50 ° C does not improve the filterability at the time of dewaxing.
  • T c was measured using a differential scanning calorimeter (“RD C 220” manufactured by Seiko Instruments Inc.) with 5 mg of polymer (A) as the sample at a constant cooling rate of 10 ° CZ. This is the crystallization onset temperature observed when cooling from 100 ° C to 150 ° C.
  • Methacrylates (a) include straight-chain or branched alkyl (Cl 16, preferably C 12 16, particularly preferably C 12 15) methacrylates, and include natural or synthetic alcohols (Ziegler alcohols). Methacrylate), oxalcol, secondary alcohol, etc.). Alkyl (C ⁇ 17) methacrylate does not improve filterability during dewaxing.
  • the degree of branching of (a) is generally 0 to 60%, preferably 0 to 40%, particularly 10 to 40% (% is not particularly limited in the following). As long as it represents weight%).
  • Preferred examples of (a) include linear or branched dodecyl, tridecyl, tetradecyl, pendudecyl or hexadecyl methacrylate (hereinafter abbreviated as C12M, C13M, C14M, C15M and C16M, respectively). Particular preference is given to C12M, C13M. C14M and C15M having a degree of branching of 20 to 40%, and mixtures of two or more thereof.
  • (a) examples include methyl, ethyl, 11-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl, neopentyl, n-hexyl, isohexyl, n-heptyl, n-octyl , 2-ethylhexyl, nonyl, decyl, or decylmethacrylate.
  • (a) preferably contains at least 80%, in particular 90 to 98% or more, of alkyl (C12 to 16) methacrylate.
  • (a) is preferably a combination of two or more alkyl methacrylates having different carbon numbers, particularly 2 to 4 alkyl methacrylates.
  • New Preferred examples of the combination include, for example, C12M / C15M, C13M / C14M, C12M / C13M / C14M, C12MZC14MZC15M, C13M / C14M / C15M or C12M / C13M / C14M / C15M.
  • Can be The alkyl group of each methacrylate may be linear, branched or a mixture of both.
  • the content ratio of each alkyl methacrylate is preferably 10 to 90%, more preferably 30 to 70%, and particularly preferably 30 to 70%, based on the total weight of (a). Is from 35 to 65%, preferably from 10 to 80%, more preferably from 20 to 60%, particularly preferably from 30 to 45%, in the case of a combination of three kinds, and preferably from 5 to 50% in the case of a combination of four kinds. It is selected from the range of 75%, more preferably from 10 to 60%, particularly preferably from 15 to 55%.
  • Acrylates (b) include linear or branched alkyl (C18-22) acrylates, including acrylates of natural or synthetic alcohols. Acrylates having 17 or less or 23 or more carbon atoms in the alkyl group cannot exhibit the effect of improving filterability. .
  • the degree of branching (content of branched alkyl acrylate) of (b) is usually 0 to
  • Examples of (b) include linear or branched octyl decyl, eicosyl or docosyl acrylate.
  • (b) is preferably a combination of two or more, particularly three, alkyl acrylates having different carbon numbers.
  • the alkyl group of each acrylate is It may be linear, branched or a mixture of both.
  • the content ratio of each alkyl acrylate in the case of combined use is preferably from 10 to 90%, more preferably from 30 to 70%, particularly preferably from 30 to 70% in the case of combined use of the two, based on the total weight of (b). It is preferably from 35 to 65%, more preferably from 2 to 60%, more preferably from 4 to 55%, particularly preferably from 6 to 50% when three kinds are used in combination.
  • the weight ratio of (a) / (b) is usually 5/95 to 80/20, preferably 5/95 to 45Z55.
  • (b) is less than 20 or more than 95, the precipitated wax and the polymer (A) do not co-crystallize and the filterability is not improved.
  • the weight ratio of (a) / (b) is calculated according to the average carbon number of the alkyl group in each of (a) and (b) (arithmetic average value based on weight, hereinafter abbreviated as C). More preferably, it is within the range.
  • Alkyl group alkyl group preferably more preferably particularly preferably
  • Tc of (A) increases the value of (a) and / or (b) Or higher by increasing the weight ratio of (b), and conversely, lowering by decreasing the C of (a) and Z or (b), or decreasing the weight ratio of (b) It is in.
  • the polymer (A) may be composed of another radically polymerizable monomer (c) in addition to (a) and (b).
  • Other monomers include the following.
  • alkyl (C18-32) methacrylate for example, octadecyl methacrylate, eicosyl methacrylate, docosyl methacrylate, tricosyl methacrylate, tetracosyl methacrylate or octacosyl methacrylate, etc.
  • (meth) acrylate means "acrylate and / or methacrylate", and so on.
  • Alkyl (C l-16) acrylate [eg methyl, ethyl, n-butyl, 2-ethylhexyl, n-butyl decyl, decyl, dodecyl, tridecyl, tetradecyl, pendecyl or hexadecyla Crelet, etc.],
  • dialkyl (C 1-24 per alkyl group) maleate for example, di-n-butyl, di-n-octyl, di-2-ethylhexyl, diradiryl or distearyl maleate]
  • Dialkyl (C 1-24 per alkyl group) fumarate for example, di-n-butyl, di-n-butyloctyl, di-2-ethylhexyl, dilauryl or distearyl fumarate]
  • dialkyl (C1-24 per alkyl group) itaconate for example, di-n-butyl, di-n-butyloctyl, di-2-ethylhexyl, diperyl or distearylitaconate, etc.
  • linear and branched 1-alkenes [C2-27; for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methylpentene-1, 1-octene, 1-dodecene , 1-tetradecene or 1-octane decene, etc.],
  • alicyclic hydrocarbon-based vinyl monomers [C 5-24; for example, cyclohexene, (di) cyclopentadiene, norpolene, pinene, indene or vinylcyclohexene],
  • Alkyl alkenyl ether [alkyl (C 1-22) alkenyl (C 2-6) ether having a linear or branched alkyl group (for example, methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether, octyl) Vinyl ether, dodecyl vinyl ether, stearyl bier ether, methylaryl ether, ethylaryl ether, butylaryl ether, octylaryl ether or dodecylaryl ether, etc.)]
  • alkyl alkenyl ether alkyl (C 1-22) alkenyl (C 2-6) ether having a linear or branched alkyl group (for example, methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether, octyl) Vinyl ether, dodecyl vinyl ether, stearyl bier ether, methylaryl ether, ethylaryl ether, but
  • aryl (C 6-18) vinyl ether for example, phenyl vinyl ether
  • Aromatic hydrocarbon-based vinyl monomers [C8-18; for example, styrene or vinyltoluene]
  • Vinyl ketones [Hyd mouth carbyl (C1-18; alkyl, aryl or aralkyl) vinyl ketone, for example, methyl vinyl ketone, butyl vinyl ketone or phenyl vinyl ketone]
  • alkadiene [C 4-12; for example, butadiene, isoprene, 1,4-pentyl or 1,7-octyl, etc.],
  • N-vinyl carboxylic acid amide for example, N-vinyl formamide, N-vinyl acetoamide or N-pierpyrrolidone, etc.
  • hydroxyalkyl (C2-30) (meth) acrylate for example, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate or ⁇ -hydroxydodecyl (meth) acrylate Related
  • Alkenol (C2-22) [for example, vinyl alcohol (formed by hydrolysis of vinyl carbonate unit), aryl alcohol, (iso) propenyl alcohol, 1-octenol or 1-octadecenol etc.], (17) Primary to tertiary amino group-containing monomer [alkenyl (C2-6) amine (eg, vinylamine, arylamine or crotylamine), amino group-containing aromatic bier monomer (N, N-dimethylaminostyrene) ), And a nitrogen-containing heterocyclic-containing vinyl monomer (eg, bierpyridine or vinylcarbazole)],
  • alkenyl (C2-6) amine eg, vinylamine, arylamine or crotylamine
  • amino group-containing aromatic bier monomer N, N-dimethylaminostyrene
  • a nitrogen-containing heterocyclic-containing vinyl monomer eg, bierpyridine or vinylcarbazole
  • nitrile or nitro group-containing vinyl monomers eg (meth) a acrylonitrile, cyanostyrene or nitrostyrene
  • Epoxy group-containing vinyl monomers for example, glycidyl (meth) aryl ether or glycidyl (meth) acrylate.
  • the sum of (a) and (b) among the monomers constituting (A) is usually at least 80%, preferably at least 90%, of all the monomers constituting the monomer from the viewpoint of improving the filterability. It is at least 95%, particularly preferably at least 100%.
  • the content is 95% or more, the effect of improving the filterability is particularly exhibited.
  • the solubility parameter (A) of (A) is preferably from 8.7 to 10.5, more preferably from 8.8 to 1 from the viewpoint of controlling the crystal shape of the precipitated wax. It is 0. SP is a value calculated by the Fedors method [Pollym. Eng. Sci. 14 (2) 15 2, (1974)].
  • the HLB of (A) is preferably from 0.5 to 9.6, more preferably from 0.8 to 6.5, from the viewpoint of controlling the crystal shape of the deposited wax.
  • HLB is a value calculated by the concept of inorganic Z organicity of organic compounds according to the Oda method ("New Introduction to Surface Active Agents J T. FUJIMOTO, SANYO CHEMICAL I NDUSTRIES, LTD. P197-201").
  • the weight average molecular weight (hereinafter, abbreviated as Mw) of (A) is preferably from 5,000 to 500,000, more preferably from 10,000, to 300,000, from the viewpoint of controlling the crystal shape of the deposited wax. 000.
  • Mw is the molecular weight converted to polystyrene by gel permeation chromatography (the same measurement method is used below).
  • (A) can be obtained by a known method.
  • it can be obtained by radical polymerization of the monomers [(a), (b) and, if necessary, (c)] in a solvent or in the absence of a solvent.
  • the polymerization initiator an azo-based initiator (for example, azobisisobutyronitrile, azobis-valeronitrile, etc.) or a peroxide-based initiator (for example, diisopropylpa Benzoyl peroxide, cumyl peroxide, lauryl peroxide, di-t-butyl peroxide, etc.).
  • Solvents used in the polymerization include C 6-18 aliphatic hydrocarbons (eg, hexane, heptane, octane, cyclohexane, etc.) and C 6-16 aromatic hydrocarbons [eg, toluene, xylene , Ethylbenzene, C9 aromatic mixed solvent (mixture of trimethylbenzene, ethyltoluene, etc.), C10-11 aromatic mixed solvent, etc.], Ketones (acetone, methylethylketone, methylisobutylketone) ) Or mineral oil. These solvents can be distilled off after the completion of the polymerization, but can also be left as a polymer solution.
  • C 6-18 aliphatic hydrocarbons eg, hexane, heptane, octane, cyclohexane, etc.
  • C 6-16 aromatic hydrocarbons eg, toluene, xylene
  • the polymer (A) of the present invention is added to mineral oil as it is or as a solution.
  • the latter is preferred from the viewpoint of the workability of addition to the mineral oil.
  • mineral oils such as a normal pressure distillation fraction and a vacuum distillation fraction (hereinafter abbreviated as a fraction) starting from crude oil are used.
  • a fraction mineral oils
  • kerosene base material component, light oil base material component, heavy oil base material component, lubricating oil base material component, etc. component obtained by solvent-purifying the fraction (for example, extraction and removal of aromatic components with an aromatic solvent such as furfural) Components, etc.), a component obtained by hydrocracking the solvent-purified component, a component obtained by hydrocracking the fraction, and a fraction purified by solvent, and an aromatic component extracted by the solvent and a fraction dewaxed.
  • aromatic solvents having 6 to 18 carbon atoms (eg, toluene, xylene, furfural, etc.), fatty acids having 10 to 24 carbon atoms (eg, oleic acid, linoleic acid, linolenic acid, etc.), And aliphatic alcohols having 8 to 20 carbon atoms (for example, oleyl alcohol and the like).
  • the polymer solution containing the solvent used in the polymerization step (A) can be used as it is.
  • mineral oil obtained by solvent-refining the fraction a component obtained by hydrocracking the solvent-purified component, a component obtained by hydrocracking the fraction, and a solvent-refined fraction extracted with the solvent.
  • This is the component from which the aromatic components and the fractions are deaerated and wax-removed.
  • components obtained by hydrocracking the fraction and components obtained by dewaxing the fraction to remove wax are particularly preferred.
  • (D) has an SP of preferably 6 to 13, more preferably 6.5 to 12, and particularly preferably 7 to 11, from the viewpoint of solubility of the polymer.
  • SP is 6 or more or 13 or less, it is difficult to separate the polymer, so that a stable additive can be added in the deaeration step.
  • (D) is preferably 1 to: L 0 Omn ⁇ Zs, more preferably 1 to 80 mm 2 Zs, particularly preferably 1 to 60 mm 2 / s from the viewpoint of workability at 100 ° C.
  • (D) has a pour point of preferably 20 ° C or lower, more preferably 10 ° C or lower, particularly preferably 0 ° C or lower from the viewpoint of workability.
  • the kinematic viscosity at 100 ° C. is a value measured by the method of JISK-2283, and the pour point is a value measured by the method of JISK-2269.
  • the dewaxing additive of the present invention preferably contains the polymer (A) in an amount of 1 to 90%, more preferably 5 to 80%, particularly preferably 10 to 80%. Contains 70% concentration. If it is 90% or less, it is preferable because it easily becomes liquid, and if it is 1% or more, the addition ratio of the additive to the mineral oil is not excessively high, so that it is preferable from the viewpoint of workability.
  • the dewaxing additive of the present invention is preferably 10 to 1000 mm 2 Zs, more preferably 10 to 80 mm, from the viewpoint of workability.
  • 0 mm 2 / s particularly preferably has a kinematic viscosity at 1 0 0 ° C for 1 0 ⁇ 6 0 0m m 2 / s, preferably below 50 ° C, more preferably 45 ° C or less, particularly preferably Has a pour point below 40 ° C.
  • the mineral oil composition of the present invention comprises the wax-containing mineral oil, the dewaxing additive and the solvent (S).
  • solvent (S) represents a substance used in a dewaxing step in a solvent dewaxing method of a wax-containing mineral oil
  • diiluent (D) represents a dewaxing additive. Represents a diluent for the preparation of).
  • Examples of the solvent (S) include ketones having a total solubility of 3 to 9 carbon atoms having low solubility in waxes such as methyl ether ketone, methyl isobutyl ketone and acetone, and 6 to 6 carbon atoms having high solubility in waxes such as toluene and benzene.
  • Examples include, but are not limited to, 12 aromatic hydrocarbons, aliphatic hydrocarbons having 3 to 9 carbon atoms such as propane and butane, and mixtures of ketones and aromatic hydrocarbons. .
  • the wax-containing mineral oil to which the dewaxing additive of the present invention is added is usually prepared by distilling crude oil at atmospheric pressure or further followed by vacuum distillation, solvent extraction, solvent deasphalting or hydrorefining. It is one of the stages that was processed.
  • These waxy mineral oils, paraffin is a component of the mineral oil, of naphthenic and aromatic components, a mineral oil containing a relatively large amount of paraffin components, their mineral oils ordinarily 2 ⁇ 3 0 mm 2 / kinematic viscosity at 1 0 0 ° C of s, density at 0.8 5 to 0.92 1 of g / cm 3 5 ° C, and has a pour point of 5 ⁇ 8 0 ° C, limited to It is not something to be done.
  • the mixing ratio between the wax-containing mineral oil and the solvent (S) is usually 1Z1 to 1Z6 volume ratio.
  • the amount added to the wax-containing mineral oil as the polymer (A) is preferably 0.001 to 1%, more preferably 0.001 to 0.5%.
  • the mineral oil composition of the present invention as a polymer other than the polymer (A), further has a crystallization onset temperature of less than 20 ° C., and has an alkyl group having 1 to 24 carbon atoms such as alkyl acrylate or A polymer (B) containing at least 80% by weight of all constituent monomers containing an alkyl methacrylate (d), and a crystallization onset temperature exceeding 50 ° C, and having 18 carbon atoms in the alkyl group. It is preferable to contain at least one polymer selected from the group consisting of polymers (C) containing at least 80% by weight of all the constituent monomers of the alkyl acrylate (b).
  • Examples of the alkyl group having 1 to 24 carbon atoms in (d) constituting the polymer (B) include the same groups as the groups exemplified as the alkyl groups in the units (a) and (b), and combinations thereof. And preferably an alkyl group having 10 to 20 carbon atoms, more preferably 11 to 18 carbon atoms, and Two or more of them may be used in combination.
  • (B) may contain the above-mentioned (c) in addition to (d) as a constituent monomer, but (B) usually contains at least 80% of all constituent monomers
  • the content of (d) is preferably 85% or more, more preferably 100%, from the viewpoint of co-crystal with the wax.
  • (d) is 80% or more, it is preferable because it easily co-crystallizes with the precipitated wax, and the filterability at the time of dewaxing is improved.
  • the lower limit of Tc in ( ⁇ ) is preferably from 130 ° C, more preferably from ⁇ 25 ° C, and particularly preferably from 120 ° C, from the viewpoint of easiness of co-crystallization with the precipitated wax. is there.
  • T c is ⁇ 30 ° C. or higher, co-crystallization with precipitated wax is easy, and filterability at the time of dewaxing is improved.
  • the polymer (C) is composed of the above-mentioned (b) and, if necessary, (c) as constituent units, and (b) is used as a constituent unit of all constituent monomers in view of the easiness of co-crystallization with the precipitated wax. 80% or more, more preferably 85% or more, particularly preferably 100%.
  • (C) usually has a Tc above 50 ° C, preferably between 55 ° C and 70 ° C.
  • Tc above 50 ° C, preferably between 55 ° C and 70 ° C.
  • alkyl acrylates having an alkyl group such that the average carbon number C of the alkyl group is 21 to 22; By adjusting the temperature to 21 to 22, it is easy to obtain Tc exceeding 50 ° C.
  • (B) and (C) preferably have an SP of 8.7 to 10.5, more preferably 8.8 to: L0, from the viewpoint of controlling the crystal shape of the deposited wax.
  • (B) and (C) are preferably from 5,000 to 500,000, and more preferably from 10,000 to 300,000, from the viewpoint of controlling the crystal shape of the deposited wax. Has ⁇ .
  • the weight ratio of each polymer is at least 10%, preferably at least 20%, by weight, based on the total of the polymers.
  • the union (B) is 0 to 90%, preferably 0 to 80%, and the polymer (C) is 0 to 50%, preferably 0 to 30%.
  • the total amount of the polymer added to the wax-containing mineral oil is preferably 0.0001 to 1%, more preferably 0.001%. It is 1-0.5%.
  • the mineral oil composition of the present invention may further contain other additives.
  • additives include conventionally known dewaxing additives such as alkylated aromatic compounds (for example, Friedel of chlorinated paraffin hydrocarbons and aromatic compounds described in US Pat. No. 3,363,226). Kraft condensate) and dialkyl fumarate / vinyl acetate copolymer (for example, US Pat. No. 4,440,771).
  • alkylated aromatic compounds for example, Friedel of chlorinated paraffin hydrocarbons and aromatic compounds described in US Pat. No. 3,363,226). Kraft condensate
  • dialkyl fumarate / vinyl acetate copolymer for example, US Pat. No. 4,440,771.
  • the above polymer which may be added to the wax-containing mineral oil in the present invention.
  • each is dissolved in a diluent (D) and added in the form of a solution.
  • a dewaxing additive comprising a polymer (A) and a diluent (D);
  • the dewaxing method using the dewaxing additive of the present invention is generally performed as follows, but is not limited thereto.
  • wax-containing oil, dewaxing additives [if necessary (B), (C) and / or other additives] and solvent (S) at 30 ° C or more, preferably 40-60 ° C
  • cooler at a cooling rate of about -1 to 15 ° C at a cooling rate of -10 ° C or less, preferably up to 110 ° C to 45 ° C (ketones or 110 ° C to 130 ° C when using a mixture with aromatic hydrocarbons as a solvent (: from 125 ° C to 45 ° C when using aliphatic hydrocarbons as a solvent) Cooled.
  • the precipitated wax is filtered under reduced pressure at this temperature at a pressure difference of about 0.2 to 0.7 kg / cm 2 ⁇ G, and separated into wax and oil.
  • Each component, including the solvent, is desolvated in a stripper to form wax and dewaxed mineral oil (see “New Petroleum Refining Process”, published by Koshobo, First Edition, First Edition, pages 365-370).
  • the melting point as a typical property of the wax obtained by these dewaxing methods is usually 5 to 80 ° C, and the property of the dewaxed mineral oil is usually a kinematic viscosity at 100 ° C of 2 to 30 mm2Zs, The density at 15 is 0.85-0.92 cm 3 , and the pour point is -10 20 ° C.
  • the dewaxed mineral oil dewaxed using the dewaxing additive of the present invention includes various lubricating oils such as engine oil, gear oil, ATF (Automatic Transmission 'Fluid), hydraulic oil, and shock absorber. It can be used for busor oil, power steering oil and traction oil. Example Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
  • Table 1 shows Tc, SP, HLB and Mw of the obtained polymer.
  • the mixture in which the wax was precipitated was led to a nonwoven fabric filter having a filtration area of 1 cm 2 , and filtered under reduced pressure of 55 OmmHg for 0.5 minutes to collect a filtrate.
  • the collected filtrate was put in a dryer at 100 ° C. to dry and remove methyl ethyl ketone / toluene, and the residue was weighed to obtain a dewaxed oil amount.
  • the amount of dewaxed oil indicates the filterability, and the larger the amount of dewaxed oil, the better the filterability.
  • Wafer-containing mineral oil [100 ° C kinematic viscosity 4.4 mm 2 / s, pour point 35.0 ° C] 250 g of polymer solution and 0.75 g of polymer solution were charged into a 1 L beaker, The mixture was heated at 50 ° C for 30 minutes, and n-hexane 50 Om1 was added and uniformly dissolved. The homogeneous solution was placed in a 3 Om1 test tube, immersed in a methanol cooling bath at 20 ° C, allowed to stand for 10 minutes, and then cooled to -40 ° C at a rate of 2 ° CZ.
  • Polymer X2 28 parts Polymer X3 60 Diluent D 60 60 60 40 60 60 60 60 60 60 60 40 Pour point, ° C 32.5 ⁇ 7.5 7.5 25.0 32.5 5.0 2.5 ⁇ 2.5 7.5 -25.0-15.0 50.0 Kinematic viscosity, mmVs 186 180 191 235 100 180 218 208 220 1100 172 420 Dewaxing method 1 3.2 3.1 2.9'3.2 3.3 2.8 2.6 3.0 2.8 1. 0.8 1.
  • the dewaxing additive of the present invention has significantly improved filterability with respect to the wax-containing mineral oil as compared with the comparative example.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

La présente invention concerne un additif de déparaffinage des huiles minérales qui comprend un polymère (A) comprenant des unités dérivant (C1-16 alkyle) méthacrylate (a) et des unités dérivant d'un (C18-22 alkyle) acrylate (b), le total des unités (a) et (b) représentant au moins 80 % de l'ensemble des unités structurelles, et le rapport massique (a) / (b) se situant entre 5/95 et 80/20. En outre, la température d'amorce de la cristallisation set comprise entre 20 °C et 50 °C. L'invention concerne également une composition d'huile minérale contenant l'additif de déparaffinage. L'invention concerne enfin un procédé de déparaffinage en utilisant l'additif de déparaffinage. Cet additif de déparaffinage améliore considérablement la filtrabilité. Le procédé de déparaffinage des huiles minérales donne une filtrabilité accrue.
PCT/JP2002/005643 2001-06-11 2002-06-07 Additif de deparaffinage et procede de deparaffinage WO2002100986A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451353A (en) * 1982-09-29 1984-05-29 Exxon Research And Engineering Co. Solvent dewaxing waxy hydrocarbon distillates using a combination poly acrylate polymer and polymethacrylate polymer dewaxing aid
CA1171810A (fr) * 1980-07-30 1984-07-31 Takatoshi Kunihiro Methode de deparaffinage des huiles paraffinees venues d'hydrotraitement
JPS61188491A (ja) * 1985-02-18 1986-08-22 Idemitsu Kosan Co Ltd 脱ろう油の製造方法
US4728414A (en) * 1986-11-21 1988-03-01 Exxon Research And Engineering Company Solvent dewaxing using combination poly (n-C24) alkylmethacrylate-poly (C8 -C20 alkyl (meth-) acrylate dewaxing aid
JP2000336377A (ja) * 1999-03-25 2000-12-05 Sanyo Chem Ind Ltd 脱ろう助剤
JP2001040371A (ja) * 1999-08-04 2001-02-13 Sanyo Chem Ind Ltd 脱ろう助剤及び鉱物油組成物
JP2001040372A (ja) * 1999-07-28 2001-02-13 Sanyo Chem Ind Ltd 脱ろう助剤及び鉱物油組成物

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1171810A (fr) * 1980-07-30 1984-07-31 Takatoshi Kunihiro Methode de deparaffinage des huiles paraffinees venues d'hydrotraitement
US4451353A (en) * 1982-09-29 1984-05-29 Exxon Research And Engineering Co. Solvent dewaxing waxy hydrocarbon distillates using a combination poly acrylate polymer and polymethacrylate polymer dewaxing aid
JPS61188491A (ja) * 1985-02-18 1986-08-22 Idemitsu Kosan Co Ltd 脱ろう油の製造方法
US4728414A (en) * 1986-11-21 1988-03-01 Exxon Research And Engineering Company Solvent dewaxing using combination poly (n-C24) alkylmethacrylate-poly (C8 -C20 alkyl (meth-) acrylate dewaxing aid
JP2000336377A (ja) * 1999-03-25 2000-12-05 Sanyo Chem Ind Ltd 脱ろう助剤
JP2001040372A (ja) * 1999-07-28 2001-02-13 Sanyo Chem Ind Ltd 脱ろう助剤及び鉱物油組成物
JP2001040371A (ja) * 1999-08-04 2001-02-13 Sanyo Chem Ind Ltd 脱ろう助剤及び鉱物油組成物

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