WO2024105947A1 - 再生油組成物の製造方法および再生工業油組成物の製造方法 - Google Patents

再生油組成物の製造方法および再生工業油組成物の製造方法 Download PDF

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WO2024105947A1
WO2024105947A1 PCT/JP2023/029246 JP2023029246W WO2024105947A1 WO 2024105947 A1 WO2024105947 A1 WO 2024105947A1 JP 2023029246 W JP2023029246 W JP 2023029246W WO 2024105947 A1 WO2024105947 A1 WO 2024105947A1
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oil composition
industrial oil
industrial
recycled
mass
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French (fr)
Japanese (ja)
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祐司 赤尾
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Citizen Watch Co Ltd
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Citizen Watch Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/38—Heterocyclic nitrogen compounds
    • C10M133/40—Six-membered ring containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond

Definitions

  • the present invention relates to a method for producing a recycled oil composition, a recycled oil composition, and a recycled industrial oil composition.
  • Patent Document 1 describes a waste oil recycling system that obtains recycled heavy oil from waste oil, which is a used industrial oil composition. Specifically, Patent Document 1 describes a waste oil recycling system that includes an impurity removal process that removes impurities from the waste oil by centrifugation, and a distillation process that heats the waste oil from which the impurities have been removed, and further evaporates and removes the impurities that were mixed in the waste oil, and obtains recycled heavy oil by distillation. The recycled heavy oil obtained here is used as fuel oil.
  • an object of the present invention is to provide a method for producing a recycled oil composition that can contribute to reducing CO2 emissions.
  • the method for producing a recycled oil composition of the present invention is a method for producing a recycled oil composition by a refining process in which a used industrial oil composition used for machine lubrication or metal processing is refined, and the refining process is performed by adsorption, hydrodesulfurization, or reduced pressure distillation.
  • the industrial oil composition before use for machine lubrication or metal processing and the used industrial oil composition used for machine lubrication or metal processing contain mineral oil (A1), synthetic oil (A2), or vegetable oil or a derivative thereof (A3) as a base oil, a neutral phosphite derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C) as antioxidants, and functional additives, and the used industrial oil composition used for machine lubrication or metal processing has a lower content of the functional additives than the industrial oil composition before use for machine lubrication or metal processing.
  • R b21 to R b24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms
  • R b25 to R b28 each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms
  • R b291 and R b292 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms
  • the total number of carbon atoms of R b291 and R b292 is 1 to 5.
  • R c1 is a straight-chain or branched alkyl group having 1 to 12 carbon atoms.
  • the method for producing a recycled oil composition of the present invention can contribute to reducing CO2 emissions.
  • FIG. 1 shows the results of measurement by high performance liquid chromatography for a used industrial oil composition (2-1').
  • FIG. 2 shows the results of measurement by high performance liquid chromatography for the recycled oil composition (2-1-1).
  • the reclaimed oil composition is produced by a refining process in which a used industrial oil composition that has been used for machine lubrication or metal processing is refined.
  • an adsorption process is carried out as the refining process.
  • the industrial oil composition before use for mechanical lubrication or metal processing contains a mineral oil (A1), a synthetic oil (A2), or a vegetable oil or a derivative thereof (A3) as a base oil.
  • A1 mineral oil
  • A2 synthetic oil
  • A3 vegetable oil or a derivative thereof
  • the industrial oil composition before use for mechanical lubrication or metal processing is also simply referred to as the industrial oil composition before use.
  • the industrial oil composition before use for mechanical lubrication is also referred to as the industrial oil composition before use for mechanical lubrication
  • the industrial oil composition before use for metal processing is also referred to as the industrial oil composition before use for metal processing.
  • mineral oils (A1) include base oils belonging to Group 1, Group 2, and Group 3 in the base oil categories defined by the American Petroleum Institute (API).
  • Base oils belonging to Group 1 are, for example, base oils obtained by solvent refining.
  • Base oils belonging to Group 2 are, for example, base oils obtained by hydrotreating.
  • Base oils belonging to Group 3 are, for example, base oils obtained by hydrocracking.
  • Specific examples of synthetic oils (A2) include base oils belonging to Groups 4 and 5, etc. in the base oil categories defined by the American Petroleum Institute.
  • Base oils belonging to Group 4 are, for example, polyalphaolefins (PAOs) obtained by chemical synthesis. Hydrogenated vegetable oils may be used as vegetable oils or derivatives thereof (A3).
  • the base oil may be used alone or in combination of two or more kinds.
  • the industrial oil composition before use also contains a neutral phosphite derivative and a 2,6-di-t-butylphenol derivative as antioxidants.
  • the neutral phosphite derivative is represented by the following formula (B).
  • the neutral phosphite derivative may be used alone or in combination of two or more types. Since the neutral phosphite derivative is a dimer, it is difficult to evaporate and can efficiently exhibit antioxidant properties.
  • R b21 to R b24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms.
  • the aliphatic hydrocarbon group having 10 to 16 carbon atoms may be a straight-chain, branched or cyclic aliphatic hydrocarbon group, and may be a saturated or unsaturated aliphatic hydrocarbon group.
  • As the aliphatic hydrocarbon group having 10 to 16 carbon atoms specifically, straight-chain alkyl groups such as decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl and hexadecyl (cetyl) groups are preferably used.
  • R b25 to R b28 each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms.
  • straight-chain or branched alkyl groups having 1 to 6 carbon atoms include methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, isopropyl, sec-butyl, isobutyl, t-butyl, isopentyl, t-pentyl, neopentyl, and isohexyl.
  • the neutral phosphite has specific substituents in R b25 to R b28 , and therefore has excellent anti-wear properties in addition to antioxidant performance. This is thought to be because the presence of specific substituents in R b25 to R b28 makes the film of the industrial oil composition adhered to the sliding parts stronger.
  • R b25 and R b27 are linear alkyl groups having 1 to 6, preferably 1 to 3, carbon atoms
  • R b26 and R b28 are branched alkyl groups having 3 to 6, preferably 3 to 4, carbon atoms
  • R b291 and R b292 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms.
  • straight-chain or branched alkyl groups having 1 to 5 carbon atoms include methyl, ethyl, n-propyl, n-butyl, n-pentyl, isopropyl, sec-butyl, isobutyl, t-butyl, isopentyl, t-pentyl, and neopentyl.
  • R b291 and R b292 are 1 to 5. Therefore, for example, when R b291 is a hydrogen atom, R b292 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms, when R b291 is a methyl group, R b292 is a straight-chain or branched alkyl group having 1 to 4 carbon atoms, and when R b291 is an ethyl group, R b292 is a straight-chain or branched alkyl group having 2 to 3 carbon atoms.
  • R b291 is a hydrogen atom and R b292 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms.
  • the 2,6-di-t-butylphenol derivative is represented by the following formula (C).
  • the 2,6-di-t-butylphenol derivative may be used alone or in combination of two or more types.
  • R c1 is a linear or branched alkyl group having 1 to 12 carbon atoms.
  • Examples of the linear or branched alkyl group having 1 to 12 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a t-butyl group, an isobutyl group, an n-pentyl group, an isopentyl group, a t-pentyl group, a neopentyl group, a hexyl group, a heptyl group, an isoheptyl group, an n-octyl group, an isooctyl group, a 2-ethylhexyl group, a nonyl group, and a decyl group.
  • the neutral phosphite derivative is preferably contained in an amount of 0.001 to 6 parts by mass per 100 parts by mass of base oil.
  • the 2,6-di-t-butylphenol derivative is preferably contained in an amount of 0.001 to 6 parts by mass per 100 parts by mass of base oil.
  • the above-mentioned industrial oil composition before use further contains a hindered amine compound as an antioxidant.
  • the hindered amine compound is represented by the following formula (D).
  • the hindered amine compound may be used alone or in combination of two or more types.
  • R d21 and R d22 each independently represent an aliphatic hydrocarbon group having 1 to 10 carbon atoms.
  • the aliphatic hydrocarbon group having 1 to 10 carbon atoms may be a straight-chain, branched or cyclic aliphatic hydrocarbon group, and may be a saturated or unsaturated aliphatic hydrocarbon group.
  • aliphatic hydrocarbon group having 1 to 10 carbon atoms specifically, a straight-chain or branched alkyl group such as a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, a neopentyl group, an isohexyl group, or a 2-ethylhexyl group is preferably used.
  • a straight-chain or branched alkyl group having 5 to 10 carbon atoms is more preferable from the viewpoint of improving durability.
  • R d23 represents a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms.
  • divalent aliphatic hydrocarbon groups having 1 to 10 carbon atoms divalent linear or branched alkylene groups such as methylene, 1,2-ethylene, 1,3-propylene, 1,4-butylene, 1,5-pentylene, 1,6-hexylene, 1,7-heptylene, 1,8-octylene, 1,9-nonylene, 1,10-decylene, and 3-methyl-1,5-pentylene are preferably used. Of these, divalent linear or branched alkylene groups having 5 to 10 carbon atoms are more preferred from the viewpoint of improving durability.
  • the sum of the numbers of carbon atoms of R d21 , R d22 and R d23 is 16 to 30 among the above.
  • a hindered amine compound When a hindered amine compound is used in an industrial oil composition prior to use, it is preferably contained in an amount of 0.002 parts by mass or more and 5 parts by mass or less per 100 parts by mass of base oil.
  • the industrial oil composition before use further contains functional additives since it is used for machine lubrication or metal processing.
  • functional additives such as an oiliness agent and a metal deactivator.
  • the oiliness agent contained in the industrial oil composition before use as a machine lubricant includes a sulfur compound.
  • zinc dialkyldithiophosphate is preferably used as the oiliness agent.
  • zinc dialkyldithiophosphate is contained in the industrial oil composition before use as a machine lubricant, the sliding properties are improved and wear can be prevented even when used at high temperatures.
  • benzotriazole derivatives are preferably used as the metal deactivator contained in the industrial oil composition before use as a machine lubricant.
  • benzotriazole derivatives are contained in the industrial oil composition before use as a machine lubricant, the metal surface can be protected and corrosion can be prevented even when used at high temperatures.
  • the above oiliness agent and metal deactivator are combined in the industrial oil composition before use as a machine lubricant, the machine can be lubricated for a longer period of time.
  • the alkyl group of zinc dialkyldithiophosphate may be a primary type alkyl group or a secondary type alkyl group.
  • a single molecule may have both a primary type alkyl group and a secondary type alkyl group.
  • the alkyl group may be linear or branched. There is no particular restriction on the number of carbon atoms in the alkyl group, but from the viewpoint of preventing wear, it is preferably 3 to 12, and more preferably 3 to 8.
  • Zinc dialkyldithiophosphate may be used alone or in combination of two or more types.
  • the benzotriazole derivative is preferably represented by the following formula (E).
  • E The benzotriazole derivative
  • R e1 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms
  • R e2 and R e3 each independently represent an alkyl group having 1 to 18 carbon atoms.
  • the benzotriazole derivatives may be used alone or in combination of two or more kinds.
  • the oiliness agent is preferably contained in an amount of 0.1 parts by mass or more and 5 parts by mass or less per 100 parts by mass of base oil.
  • the metal deactivator is preferably contained in an amount of 0.01 parts by mass or more and 5 parts by mass or less per 100 parts by mass of base oil.
  • the composition contains, in addition to the base oil and antioxidant, functional additives such as extreme pressure agents and metal deactivators.
  • a sulfur compound is preferably used as the extreme pressure agent contained in the industrial oil composition before use for metal processing.
  • an active sulfur compound can be mentioned.
  • the metal deactivator contained in the industrial oil composition before use for metal processing for example, a thiadiazole derivative is preferably used.
  • a thiadiazole derivative is contained in the industrial oil composition before use for metal processing, the metal surface can be protected and corrosion can be prevented even when used at high temperatures.
  • processing of copper-based metals is also possible.
  • the active sulfur compound may be any compound that contains active sulfur in the molecule.
  • the active sulfur compound refers to, for example, a compound that contains sulfur atoms but does not contain metal atoms or phosphorus atoms, and that has a copper plate corrosion of 2 to 4 when diluted with refined mineral oil to a sulfur content of 1% by mass, as measured according to JIS K2513 (Petroleum products - copper plate corrosion test method; test tube method, heated at 100°C for 1 hour).
  • a compound that contains sulfur atoms but does not contain metal atoms or phosphorus atoms and has a copper plate corrosion of 1 in the above test method is called an inactive sulfur compound.
  • active sulfur compounds examples include polysulfides, sulfurized oils and fats, powdered sulfur, sulfurized mineral oil, sulfurized esters, and sulfurized olefins. Of these, sulfurized olefins are preferably used.
  • the active sulfur compounds may be used alone or in combination of two or more types. Even if the raw materials and sulfur content of these active sulfur compounds are similar, they may be inactive sulfur compounds depending on the manufacturing conditions, etc.
  • the thiadiazole derivative is preferably 2,5-bis(alkyldithio)-1,3,4-thiadiazole, and is represented by the following formula (F).
  • F 2,5-bis(alkyldithio)-1,3,4-thiadiazole
  • R f1 and R f2 each independently represent an alkyl group having 1 to 20 carbon atoms, and a and b each independently represent 1, 2, or 3.
  • the thiadiazole derivative may be used alone or in combination of two or more kinds.
  • the extreme pressure agent is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less per 100 parts by mass of base oil.
  • the metal deactivator is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less per 100 parts by mass of base oil.
  • the industrial oil composition before use for metal processing does not contain the above-mentioned metal deactivators, it can be suitably used for processing metals other than copper-based metals, such as metals containing iron.
  • an inactive sulfur compound may be used as the extreme pressure agent instead of an active sulfur compound.
  • the industrial oil composition before use may further contain other functional additives.
  • other functional additives include chlorinated paraffin. It is preferable that the other functional additives are contained in the industrial oil composition before use to the extent that they do not interfere with the effects of long-term use, etc.
  • the industrial oil composition before use for mechanical lubrication preferably has a kinetic viscosity at 40°C (JIS K 2283) of 15 cSt or more and 100 cSt or less, and more preferably 32 cSt or more and 68 cSt or less.
  • the industrial oil composition before use for metal processing preferably has a kinetic viscosity at 40°C (JIS K 2283) of 2 cSt or more and 40 cSt or less.
  • the industrial oil composition before use for cutting processing more preferably has a kinetic viscosity at 40°C (JIS K 2283) of 10 cSt or more and 40 cSt or less.
  • the industrial oil composition before use can be used in a known manner as turbine oil, hydraulic oil, bearing oil, gear oil, compressor oil, or traction oil.
  • the industrial oil composition before use can be used in a known manner as cutting oil, rolling oil, drawing/drawing oil, cleaning oil, plastic processing oil, punching oil, heat treatment oil, or heat transfer oil.
  • the industrial oil composition before use becomes a used industrial oil composition that has been used for machine lubrication or metal processing.
  • the used industrial oil composition that has been used for machine lubrication or metal processing is also simply referred to as a used industrial oil composition.
  • the used industrial oil composition may be mixed with flushing oil, which is used when replacing the used industrial oil composition used for machine lubrication. It is preferable that the flushing oil also contains the above-mentioned base oil and antioxidant.
  • used industrial oil compositions In used industrial oil compositions, it is generally believed that most of the functional additives have been consumed.
  • used industrial oil compositions generally contain deteriorated components, such as functional additives, base oils, and antioxidants, which have been altered and lost their functions due to decomposition, chemical synthesis, etc. during use.
  • used industrial oil compositions generally contain impurity components such as solids, such as metals, that are generated and mixed in during use. Used industrial oil compositions are often colored brown or similar because they contain deteriorated components and impurity components.
  • used industrial oil compositions generally also contain base oils, antioxidants, and functional additives that remain in the same state as before use. The reason why a high proportion of base oil and antioxidants can remain in used industrial oil compositions is that the antioxidants themselves are highly stable, and the antioxidants suppress the deterioration of the base oil.
  • the used industrial oil composition used in the above-mentioned machine lubrication or metal processing is subjected to a refining process, i.e., an adsorption process.
  • the adsorbent used in the adsorption treatment is, for example, acid clay, activated clay, or a silica-magnesia-based preparation.
  • Acid clay is a clay mainly composed of a clay mineral of the montmorillonite genus having a three-layer structure of silica-alumina-silica and soluble silicic acid.
  • Activated clay is a compound obtained by treating naturally occurring acid clay (montmorillonite clay) with a mineral acid such as sulfuric acid, and has a porous structure with a large specific surface area and adsorption capacity. Activated clay is preferably in the form of particles.
  • the particle size of activated clay is preferably, for example, 0.1 ⁇ m or more and 100 ⁇ m or less, and more preferably 10 ⁇ m or more and 50 ⁇ m or less.
  • the particle size of activated clay is the median size measured on a volume basis measured by a laser diffraction/scattering method.
  • the specific surface area of activated clay is preferably 1 m 2 /g or more and 500 m 2 /g or less, and more preferably 50 m 2 /g or more and 350 m 2 /g or less.
  • the specific surface area of the activated clay is a value measured by the BET method.
  • the silica-magnesia-based preparation contains a silica component and a magnesia component.
  • the silica-magnesia-based preparation a three-layer structure in which a silica component layer sandwiches a magnesia component layer is formed in a matrix phase made of silica fine particles.
  • the adsorbent can selectively adsorb substances having polar groups. From the viewpoint of the ability to remove degenerated components and impurity components, it is preferable to use activated clay or a silica-magnesia-based preparation. Furthermore, since the amount of use can be reduced due to the high ability to remove degenerated components and impurity components, it is more preferable to use a silica-magnesia-based preparation.
  • the adsorbent may be used alone or in combination of two or more types.
  • the used industrial oil composition is brought into contact with an adsorbent.
  • the degree of coloration is reduced in the regenerated oil composition obtained by the adsorbent process.
  • the adsorbent partially removes impurity components (sulfur-containing components) originally contained in the base oil, as well as altered components that result from the alteration of these impurity components during use.
  • an adsorbent is first added to the used industrial oil composition to obtain a mixture.
  • the mixture is then stirred.
  • Stirring methods include stirring with a stirrer, propeller stirring, planetary stirring by rotation and revolution, stirring with a stirring rod, and continuous stirring by flowing through a pipe that induces stirring.
  • the stirring time may be any condition that allows sufficient contact between the adsorbent and the used industrial oil composition in the mixture, and is preferably 5 minutes or more.
  • Stirring is preferably performed at room temperature (e.g., 15°C) or higher, and more preferably at 80°C to 130°C. If the stirring temperature is too low, the viscosity may be high and the stirring efficiency may decrease. On the other hand, if the stirring temperature is too high, the functional additives may thermally decompose, resulting in the generation of new altered components.
  • solids such as the adsorbent that has adsorbed the altered components and impurity components are separated and removed from the mixture to obtain a regenerated oil composition.
  • Methods for separation and removal include centrifugation and filter filtration. There are no particular restrictions on the conditions for centrifugation or the aperture of the filter, as long as the solids can be separated and removed. For example, it is preferable that the aperture of the filter is 4 ⁇ m or less. In the case of centrifugal filtration, the conditions should be such that the solids can settle and be separated from the supernatant (liquid) components.
  • the above-mentioned adsorption treatment may be carried out multiple times. In this case, it is preferable to contact the adsorbent used multiple times in a total amount of 10 parts by mass or more per 100 parts by mass of the used industrial oil composition, and it is more preferable to contact the adsorbent in an amount of 10 parts by mass or more and 100 parts by mass or less.
  • the adsorbent used in the adsorption treatment can be used as a heat source and a bulking agent during cement production.
  • the functional additive used in the industrial oil composition before use contains sulfur (specifically, if a sulfur compound containing sulfur is used as the functional additive), it is preferable to further include a sulfur amount measurement step for measuring the amount of sulfur in the used industrial oil composition.
  • the amount of sulfur can be measured by ICP analysis. Note that the amount of sulfur measured in the sulfur amount measurement step is usually considered to be derived from sulfur compounds, their altered components, and the base oil.
  • the above-mentioned refining process is carried out.
  • the amount of sulfur obtained in the sulfur amount measurement process is taken as 100 parts by mass
  • the adsorption process is carried out multiple times, it is preferable to use the adsorbent in such a way that the total amount used in the multiple times is the above amount.
  • the adsorbent is used in the above amount, in addition to sulfur compounds and their altered components, antioxidants and functional additives and their altered components that remain in the state before use can also be suitably removed.
  • a sulfur amount confirmation step in which the amount of sulfur in the reclaimed oil composition obtained in the refining process is measured and it is confirmed that the sulfur has been reduced. Note that the extent to which the amount of sulfur has been reduced after the refining process can also be confirmed by measuring the amount of sulfur in the same manner as described above. Furthermore, the amount of sulfur measured in the sulfur amount confirmation step is usually considered to be derived from the base oil, since sulfur compounds and their altered components have usually been removed.
  • the regenerated oil composition is obtained.
  • the industrial oil composition before use contains at least a neutral phosphite derivative and a 2,6-di-t-butylphenol derivative as antioxidants. That is, the antioxidant allows the base oil to remain at a high rate even when used for mechanical lubrication or metal processing.
  • a hindered amine compound is contained as an antioxidant, the deterioration of the base oil can be further suppressed even when used for mechanical lubrication or metal processing.
  • the antioxidant since the antioxidant has high stability, it remains at a high rate even when used for mechanical lubrication or metal processing.
  • a regenerated oil composition is obtained that is mostly composed of the base oil remaining in the state before the industrial oil composition was used (note that the regenerated oil composition also contains a trace amount of the adsorbent that could not be completely separated.). Since the base oil contained in the regenerated oil composition is the same as the base oil contained in the industrial oil composition before use, it is also possible to use it as it is to produce a regenerated industrial oil composition.
  • the recycled oil composition when used to produce a recycled industrial oil composition, may be used by adding the above-mentioned base oil as new oil, or the recycled oil compositions may be mixed together. Therefore, according to embodiment 1, the recycled oil composition can be used as a recycled industrial oil composition for machine lubrication or metal processing, rather than a recycled industrial oil composition for fuel as in the past, and can contribute to reducing CO2 .
  • the conventional regenerated oil composition is subject to rapid deterioration of the industrial oil composition after use, it is often used as fuel oil as in Patent Document 1 even after regeneration.
  • a large amount of new base oil must be mixed in order to obtain the desired performance.
  • the regeneration process for obtaining a conventional regenerated oil composition cannot contribute to reducing CO2 .
  • a reclaimed oil composition is produced by a refining process in which a used industrial oil composition used for machine lubrication or metal processing is refined.
  • the refining process includes adsorption and then vacuum distillation.
  • embodiment 2 differs from embodiment 1 in that a reclaimed oil composition is produced by performing adsorption followed by vacuum distillation. The following describes the differences from embodiment 1. Note that the same points as embodiment 1 will not be described for embodiment 2.
  • a vacuum distillation process is performed on the used industrial oil composition that has been subjected to the adsorption process (adsorbed industrial oil composition).
  • the vacuum distillation process is preferably performed at a vacuum level of 24 mmHg or less, and at a heating temperature of 230°C to 280°C.
  • a base oil with a kinetic viscosity at 40°C (JIS K 2283) of 10 cSt to 80 cSt boils at around 240°C, and the base oil can be distilled.
  • the vacuum distillation process has the advantage that deteriorated components and impurity components remaining in the adsorbed industrial oil composition can be further removed.
  • the reclaimed oil composition obtained through such adsorption and vacuum distillation processes is mostly composed of base oil that remains in the state before the industrial oil composition was used (note that the reclaimed oil composition also contains a small amount of adsorbent that was not completely separated).
  • the refining process may involve performing an adsorption process, adding the above-mentioned antioxidant to the adsorption-treated industrial oil composition, and then performing a vacuum distillation process.
  • the adsorption-treated industrial oil composition is mostly composed of base oil remaining in the state it was in before the industrial oil composition was used. Adding the above-mentioned antioxidant to this increases the stability of the base oil. If a vacuum distillation process is performed on the adsorption-treated industrial oil composition to which such an antioxidant has been added, deterioration of the base oil can be suitably suppressed even if it is heated during the vacuum distillation process. In particular, deterioration can be suppressed even for base oils that boil at high temperatures (for example, temperatures above 240°C, preferably 260°C to 280°C) during the vacuum distillation process.
  • the above-mentioned recycled oil composition can be obtained according to embodiment 2.
  • the recycled oil composition obtained in embodiment 2 can be used as a recycled industrial oil composition for machine lubrication or metal processing, rather than as a fuel as in the past, and can contribute to reducing CO2 emissions.
  • a reclaimed oil composition is produced by a refining process in which a used industrial oil composition used for machine lubrication or metal processing is refined.
  • a refining process hydrodesulfurization is performed, or hydrodesulfurization is followed by vacuum distillation.
  • embodiment 3 differs from embodiments 1 and 2 in that a hydrodesulfurization process is performed instead of an adsorption process to produce a reclaimed oil composition.
  • the following describes the differences from embodiments 1 and 2. Note that the same points as embodiments 1 and 2 for embodiment 3 will not be described.
  • Hydrodesulfurization is carried out using a hydrodesulfurization catalyst under high temperature and pressure. This makes it possible to remove modified and impurity components, along with antioxidants and functional additives that remain in the used industrial oil composition in the state they were in before use. As a result, the degree of coloration is reduced in the reclaimed oil composition obtained by hydrodesulfurization. Note that hydrodesulfurization is particularly capable of removing sulfur compounds and their modified components that remain in the used industrial oil composition. It is believed that the majority of the reclaimed oil composition obtained through such hydrodesulfurization is composed of base oil that remains in the state it was in before the industrial oil composition was used.
  • the hydrodesulfurized industrial oil composition may be subjected to a vacuum distillation process.
  • Vacuum distillation has the advantage that deteriorated components and impurities remaining in the hydrodesulfurized industrial oil composition can be further removed. It is believed that the regenerated oil composition obtained through such hydrodesulfurization and vacuum distillation processes is largely composed of base oil remaining in the state it was in before the industrial oil composition was used.
  • the above-mentioned recycled oil composition can be obtained according to embodiment 3.
  • the recycled oil composition obtained in embodiment 3 can be used as a recycled industrial oil composition for machine lubrication or metal processing, rather than for fuel as in the past, and can contribute to reducing CO2 emissions.
  • a reclaimed oil composition is produced by a refining process in which a used industrial oil composition used for machine lubrication or metal processing is refined.
  • a vacuum distillation process is performed as the refining process.
  • embodiment 4 differs from embodiment 1 in that a vacuum distillation process is performed instead of an adsorption process to produce a reclaimed oil composition. The following describes the differences from embodiment 1. Note that the same points as embodiment 1 will not be described for embodiment 4.
  • the vacuum distillation process is preferably performed at a vacuum level of 24 mmHg or less, and at a heating temperature of 230°C to 280°C.
  • a base oil having a kinetic viscosity (JIS K 2283) of 10 cSt to 80 cSt at 40°C boils at around 240°C, and the base oil can be distilled.
  • JIS K 2283 kinetic viscosity
  • the regenerated oil composition obtained by the vacuum distillation process has a reduced degree of coloration. It is believed that the regenerated oil composition obtained through such a vacuum distillation process is mostly composed of the base oil that remains in the state before the industrial oil composition was used.
  • the used industrial oil composition contains antioxidants that remain in the same state as before use, deterioration of the base oil can be suppressed even if it is heated during the reduced pressure distillation process.
  • deterioration can be suppressed even for base oils that boil at high temperatures (for example, temperatures above 240°C, preferably 260°C or higher and 280°C or lower) during the reduced pressure distillation process.
  • the above-mentioned antioxidants may be added to the used industrial oil composition before the reduced pressure distillation process. This makes it possible to further suppress deterioration of the base oil even if it is heated during the reduced pressure distillation process.
  • the above-mentioned recycled oil composition can be obtained according to embodiment 4.
  • the recycled oil composition obtained in embodiment 4 can be used as a recycled industrial oil composition for machine lubrication or metal processing, not for fuel as in the past, and can contribute to reducing CO2 .
  • the manufacturing methods of embodiments 1 to 4 When producing a regenerated oil composition from a used industrial oil composition, which of the manufacturing methods of embodiments 1 to 4 is used may be determined based on whether or not the functional additive used in the industrial oil composition before use contains a sulfur compound. Specifically, if no sulfur compound is contained, any of the manufacturing methods of embodiments 1 to 4 may be used. Also, if a sulfur compound with a decomposition temperature of 260°C or higher is contained, any of the manufacturing methods of embodiments 1 to 4 may be used. On the other hand, if a sulfur compound with a decomposition temperature of less than 260°C is contained, it is preferable to use any of the manufacturing methods of embodiments 1 to 3. If a sulfur compound with a decomposition temperature of less than 260°C is contained, and a reduced pressure distillation process is performed first as in embodiment 4, the inside of the apparatus used for reduced pressure distillation may become black due to the sulfur compound.
  • the refining process may be carried out using defective products or dead stock that arise during the manufacturing of the industrial oil composition, instead of the used industrial oil composition. This allows the defective products or dead stock to be reused.
  • the method for producing a regenerated industrial oil composition of embodiment 5 includes an additive addition step of adding the above-mentioned antioxidant and functional additive to the regenerated oil composition obtained by the method for producing the regenerated oil composition of embodiments 1 to 4.
  • the antioxidant is a neutral phosphite derivative represented by the above formula (B) and a 2,6-di-t-butylphenol derivative represented by the above formula (C). It is also preferable to use a hindered amine compound represented by the above formula (D).
  • an antioxidant and a functional additive to the regenerated oil composition obtained in embodiments 1 to 4 so that the amount of the antioxidant and functional additive is the above-mentioned amount in the regenerated industrial oil composition. This makes it suitable for use in machine lubrication or metal processing.
  • the base oil described above may be added as new oil or another recycled oil composition may be added to the recycled industrial oil composition to which the antioxidant and functional additives have been added.
  • the additive addition process may be carried out after adding the base oil described above as new oil to the recycled oil composition or after mixing the recycled oil compositions together. This allows the viscosity of the recycled industrial oil composition to be adjusted.
  • a new regenerated oil composition can be obtained. If the additive addition process is subsequently performed, a new regenerated industrial oil composition can be obtained. In this way, it is possible to repeat the cycle of use and refining, which can further contribute to reducing CO2 emissions.
  • the method for producing the regenerated oil composition can contribute to reducing CO 2 .
  • R b21 to R b24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms
  • R b25 to R b28 each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms
  • R b291 and R b292 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and the total number of carbon atoms of R b291 and R b292 is 1 to 5.
  • R c1 is a linear or branched alkyl group having 1 to 12 carbon atoms.
  • the method for producing the reclaimed oil composition can contribute to further reduction of CO2 emissions.
  • R d21 and R d22 each independently represent an aliphatic hydrocarbon group having 1 to 10 carbon atoms
  • R d23 represents a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms.
  • the adsorption treatment is carried out, The method for producing a reclaimed oil composition according to [1], wherein the adsorption treatment is a treatment in which the used industrial oil composition is brought into contact with an adsorbent such as acid clay, activated clay or a silica-magnesia-based preparation.
  • the refining treatment can suitably remove altered components and impurities.
  • the refining treatment can more effectively remove altered components and impurity components.
  • the refining treatment can more effectively remove altered components and impurity components.
  • the adsorbent is used in the above amount, altered components and impurity components can be more effectively removed.
  • the method for producing the reclaimed oil composition according to [3] or [4] further comprises a sulfur amount measurement step for measuring the amount of sulfur in the used industrial oil composition, and a sulfur amount confirmation step for measuring the amount of sulfur in the reclaimed oil composition obtained in the refining treatment step and confirming that the sulfur has been reduced.
  • a method for producing a recycled industrial oil composition comprising the step of adding a neutral phosphite derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C) as antioxidants, and a functional additive, to the recycled oil composition obtained by the method for producing a recycled oil composition according to [1] or [2].
  • the resulting recycled industrial oil composition can be suitably used for machine lubrication or metal processing.
  • R b21 to R b24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms
  • R b25 to R b28 each independently represent a linear or branched alkyl group having 1 to 6 carbon atoms
  • R b291 and R b292 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and the total number of carbon atoms of R b291 and R b292 is 1 to 5.
  • R c1 is a linear or branched alkyl group having 1 to 12 carbon atoms.
  • Example 1 The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples.
  • a base oil belonging to Group 1 having a kinematic viscosity at 40°C (JIS K 2283) of 30 cSt (product name: 150 NEUTRAL, manufactured by ENEOS Corporation) and a base oil belonging to Group 1 having a kinematic viscosity at 40°C (JIS K 2283) of 74 cSt (product name: 350 NEUTRAL, manufactured by ENEOS Corporation) were mixed to obtain a mineral oil (A1-1).
  • the mineral oil (A1-1) had a kinematic viscosity at 40°C (JIS K 2283) of 68 cSt.
  • the sulfur concentration of the mineral oil (A1-1) measured by ICP analysis was 0.42 mass%.
  • the neutral phosphite derivative had a concentration of 0.1 mass%
  • the 2,6-di-t-butylphenol derivative had a concentration of 0.5 mass%
  • the hindered amine compound had a concentration of 0.1 mass%
  • the sulfurized oil and fat had a concentration of 4 mass%.
  • An industrial oil composition (1-1a) before use was also prepared in the same manner as in Preparation Example 1-1, except that a different rod of a base oil belonging to Group 1 (product name: 350 NEUTRAL, manufactured by ENEOS Corporation) having a kinematic viscosity at 40 ° C. (JIS K 2283) of 68 cSt was used for the industrial oil composition (1-1) before use.
  • the sulfur concentration of the mineral oil (A1-1) with the different rod was measured by ICP analysis and was 0.43 mass%.
  • Preparation Example 1-2 An industrial oil composition (1-2) prior to use was obtained in the same manner as in Preparation Example 1-1, except that a sulfurized oil (product name: S-220, manufactured by DIC Corporation), which is an inactive sulfur compound, was used instead of the sulfurized oil (product name: GS-110, manufactured by DIC Corporation), which is an inactive sulfur compound.
  • a sulfurized oil product name: S-220, manufactured by DIC Corporation
  • GS-110 sulfurized oil
  • Preparation Example 1-3 An industrial oil composition (1-3) prior to use was obtained in the same manner as in Preparation Example 1-1, except that a sulfurized olefin (product name: GS-450, manufactured by DIC Corporation), which is an inactive sulfur compound, was used instead of the sulfurized oil and fat (product name: GS-110, manufactured by DIC Corporation), which is an inactive sulfur compound.
  • a sulfurized olefin product name: GS-450, manufactured by DIC Corporation
  • GS-110 sulfurized oil and fat
  • Preparation Example 1-4 An industrial oil composition (1-4) prior to use was obtained in the same manner as in Preparation Example 1-1, except that a sulfurized olefin (product name: IS-30, manufactured by DIC Corporation), which is an inactive sulfur compound, was used instead of the sulfurized oil and fat (product name: GS-110, manufactured by DIC Corporation), which is an inactive sulfur compound.
  • a sulfurized olefin product name: IS-30, manufactured by DIC Corporation
  • GS-110 sulfurized oil and fat
  • Preparation Example 1-6 A pre-used industrial oil composition (1-6) was obtained in the same manner as in Preparation Example 1-3, except that the concentration of sulfurized olefin (product name: GS-450, manufactured by DIC Corporation) in the pre-used industrial oil composition (1-1) was adjusted to 1 mass % instead of 4 mass %.
  • Preparation Example 1-7 A mineral oil (A1-1), 4,4'-butylidenebis(3-methyl-6-t-butylphenyl ditridecyl phosphite) as a neutral phosphite derivative, octyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate (CAS 125643-61-0, product name: Irganox (registered trademark) L135, manufactured by BASF Japan Ltd.) as a 2,6-di-t-butylphenol derivative, and a sulfurized oil and fat (product name: GS-110, manufactured by DIC Corporation), which is an inactive sulfur compound, were mixed together to obtain an industrial oil composition (1-7) prior to use.
  • a sulfurized oil and fat product name: GS-110, manufactured by DIC Corporation
  • the neutral phosphite derivative was mixed at a concentration of 0.1 mass%
  • the 2,6-di-t-butylphenol derivative was mixed at a concentration of 0.5 mass%
  • the sulfurized oil and fat was mixed at a concentration of 4 mass%.
  • Preparation Example 2-1 A base oil belonging to Group 1 having a kinematic viscosity at 40°C (JIS K 2283) of 30 cSt (product name: 150 NEUTRAL, manufactured by ENEOS Corporation) and a base oil belonging to Group 1 having a kinematic viscosity at 40°C (JIS K 2283) of 68 cSt (product name: 350 NEUTRAL, manufactured by ENEOS Corporation) were mixed to obtain a mineral oil (A1-2).
  • the mineral oil (A1-2) had a kinematic viscosity at 40°C (JIS K 2283) of 32 cSt.
  • the sulfur concentration of the mineral oil (A1-2) measured by ICP analysis was 0.34 mass%.
  • a sulfurized oil and fat product name: GS-110, manufactured by DIC Corporation
  • the neutral phosphite derivative had a concentration of 0.1 mass%
  • the 2,6-di-t-butylphenol derivative had a concentration of 0.5 mass%
  • the hindered amine compound had a concentration of 0.1 mass%
  • the sulfurized oil and fat had a concentration of 4 mass%.
  • Preparation Examples 2-2 to 2-7 Used industrial oil compositions (2-2) to (2-7) were obtained in the same manner as in Preparation Examples 1-2 to 1-7, respectively, except that mineral oil (A1-2) was used instead of mineral oil (A1-1).
  • the industrial oil composition (1-1) before use was subjected to a simulation of use in machine lubrication or metal processing. That is, the industrial oil composition (1-1) before use was held in the atmosphere at 290°C for 1 hour. The industrial oil composition (1-1) before use that had been held at this high temperature was designated as a used industrial oil composition (1-1').
  • Used industrial oil compositions (1-1'), (1-1a'), (1-2') to (1-7'), (1-8'-1) to (1-8'-6), (1-9'-1) to (1-9'-6), and (2-1) to (2-7) were obtained in the same manner as above, except that the used industrial oil compositions (1-1a), (1-2) to (1-7), (1-8-1) to (1-8'-6), (1-9'-1) to (1-9'-6), and (2-1') to (2-7') were used instead of the used industrial oil composition (1-1).
  • a recycled oil composition (1-1-1) was produced from a used industrial oil composition (1-1').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (1-1').
  • the sulfur concentration in the used industrial oil composition (1-1') was 0.77 mass%.
  • 30 parts by mass of an adsorbent product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.
  • adsorbent product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.
  • Activated Clay R-15 Japan Activated Clay Co., Ltd.
  • a sulfur content confirmation step was carried out to measure the amount of sulfur in the treated industrial oil composition (1-1-1A), treated industrial oil composition (1-1-1B), and regenerated oil composition (1-1-1).
  • the concentrations of sulfur in the treated industrial oil composition (1-1-1A), treated industrial oil composition (1-1-1B), and regenerated oil composition (1-1-1) were 0.57% by mass, 0.40% by mass, and 0.36% by mass, respectively. It is believed that the sulfur other than that derived from the base oil was removed by three adsorption treatments (amount of adsorbent used: total of 90 parts by mass).
  • the regenerated oil composition (1-1-1) has been removed from the antioxidant and functional additives remaining in the state before use, as well as many of the altered components and impurity components, and is believed to be composed mostly of the base oil remaining in the state before the industrial oil composition was used.
  • the recycled industrial oil composition (1-1-1') was mixed so that the concentration of the neutral phosphite ester derivative was 0.1 mass%, the concentration of the 2,6-di-t-butylphenol derivative was 0.5 mass%, the concentration of the hindered amine compound was 0.1 mass%, and the concentration of the sulfurized oil and fat was 4 mass%.
  • a reclaimed oil composition (1-1a-1) was produced from a used industrial oil composition (1-1a').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (1-1a').
  • the sulfur concentration in the used industrial oil composition (1-1a') was 0.74 mass%.
  • 10 parts by mass of an adsorbent product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.
  • the concentrations of sulfur in the treated industrial oil composition (1-1a-1A), treated industrial oil composition (1-1a-1B), and regenerated oil composition (1-1a-1) were 0.65% by mass, 0.57% by mass, and 0.50% by mass, respectively. It is believed that the three adsorption treatments (amount of adsorbent used: a total of 30 parts by mass) were able to remove almost all sulfur other than that derived from the base oil.
  • the regenerated oil composition (1-1a-1) has been removed of many of the antioxidants and functional additives remaining in the state before use, as well as the altered components and impurity components, and is believed to be composed mostly of the base oil remaining in the state before the industrial oil composition was used.
  • the recycled industrial oil composition (1-1a-1') was mixed so that the concentration of neutral phosphite derivative was 0.1 mass%, the concentration of 2,6-di-t-butylphenol derivative was 0.5 mass%, the concentration of hindered amine compound was 0.1 mass%, and the concentration of sulfurized oil and fat was 4 mass%.
  • a reclaimed oil composition (1-1a-2) was produced from a used industrial oil composition (1-1a').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (1-1a').
  • the sulfur concentration in the used industrial oil composition (1-1a') was 0.74 mass%.
  • 10 parts by mass of an adsorbent product name: activated clay, Galleon Earth (registered trademark) V2, Mizusawa Industrial Chemicals Co., Ltd.
  • adsorbent product name: activated clay Galleon Earth V2, Mizusawa Industrial Chemicals
  • 10 parts by mass of an adsorbent was added to 100 parts by mass of the treated industrial oil composition (1-1a-2B) to obtain a mixture.
  • This mixture was stirred at room temperature for 5 minutes with a stirrer.
  • the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (1-1a-2C) (reclaimed oil composition (1-1a-2)).
  • the adsorption treatment was carried out three times.
  • a sulfur content confirmation step was carried out to measure the amount of sulfur in the treated industrial oil composition (1-1a-2A), treated industrial oil composition (1-1a-2B), and regenerated oil composition (1-1a-2).
  • the concentrations of sulfur in the treated industrial oil composition (1-1a-2A), treated industrial oil composition (1-1a-2B), and regenerated oil composition (1-1a-2) were 0.63% by mass, 0.52% by mass, and 0.40% by mass, respectively. It is believed that the sulfur other than that derived from the base oil was removed by three adsorption treatments (amount of adsorbent used: total of 30 parts by mass).
  • the regenerated oil composition (1-1a-2) has been removed from the antioxidant and functional additives remaining in the state before use, as well as many of the altered components and impurity components, and is believed to be composed mostly of the base oil remaining in the state before the industrial oil composition was used.
  • the recycled industrial oil composition (1-1a-2') was mixed so that the concentration of neutral phosphite derivative was 0.1 mass%, the concentration of 2,6-di-t-butylphenol derivative was 0.5 mass%, the concentration of hindered amine compound was 0.1 mass%, and the concentration of sulfurized oil and fat was 4 mass%.
  • Example 1-1a-3 (Production of Reclaimed Oil Composition)
  • a reclaimed oil composition (1-1a-3) was produced from a used industrial oil composition (1-1a').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (1-1a').
  • the sulfur concentration in the used industrial oil composition (1-1a') was 0.74 mass%.
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • This mixture was stirred at room temperature for 5 minutes with a stirrer.
  • the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (1-1a-3A).
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • This mixture was stirred at room temperature for 5 minutes with a stirrer.
  • the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (1-1a-3B).
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • adsorbent product name: silica-magnesia preparation Mizuka Life (registered trademark) F-2G, Mizusawa Industrial Chemicals Co., Ltd.
  • This mixture was stirred at room temperature for 5 minutes with a stirrer.
  • the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (1-1a-3C) (reclaimed oil composition (1-1a-3)). In this manner, the adsorption treatment was carried out three times.
  • a sulfur content confirmation step was carried out to measure the amount of sulfur in the treated industrial oil composition (1-1a-3A), treated industrial oil composition (1-1a-3B), and regenerated oil composition (1-1a-3).
  • concentrations of sulfur in the treated industrial oil composition (1-1a-3A), treated industrial oil composition (1-1a-3B), and regenerated oil composition (1-1a-3) were 0.61% by mass, 0.50% by mass, and 0.35% by mass, respectively. It is believed that the sulfur other than that derived from the base oil was removed by three adsorption treatments (amount of adsorbent used: total of 30 parts by mass).
  • the regenerated oil composition (1-1a-3) has been removed from many of the antioxidants and functional additives remaining in the state before use, as well as the altered components and impurity components, and is believed to be composed mostly of the base oil remaining in the state before the industrial oil composition was used.
  • the recycled industrial oil composition (1-1a-3') was mixed so that the concentration of neutral phosphite derivative was 0.1 mass%, the concentration of 2,6-di-t-butylphenol derivative was 0.5 mass%, the concentration of hindered amine compound was 0.1 mass%, and the concentration of sulfurized oil and fat was 4 mass%.
  • a recycled oil composition (2-1-1) was produced from a used industrial oil composition (2-1').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (2-1').
  • the sulfur concentration in the used industrial oil composition (2-1') was 0.45 mass%.
  • 30 parts by mass of an adsorbent product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.
  • the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (2-1-1A). Also, 30 parts by mass of an adsorbent (product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.) was added to 100 parts by mass of the treated industrial oil composition (2-1-1A) to obtain a mixture. This mixture was stirred at room temperature for 5 minutes with a stirrer. Next, the adsorbent was separated by centrifugation to obtain a treated industrial oil composition (2-1-1B). Furthermore, 30 parts by mass of an adsorbent (product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.) was added to 100 parts by mass of the treated industrial oil composition (2-1-1B) to obtain a mixture.
  • an adsorbent product name: Activated Clay R-15, Japan Activated Clay Co., Ltd.
  • Figures 1 and 2 show the results of measurement by high performance liquid chromatography for a used industrial oil composition (2-1') and a reclaimed oil composition (2-1-1), respectively.
  • a used industrial oil composition (2-1') peaks derived from the mineral oil (A2-1), antioxidants, sulfur compounds, etc. are observed.
  • the reclaimed oil composition (2-1-1) only peaks derived from the mineral oil (A2-1) are observed.
  • the adsorption treatment has removed from the reclaimed oil composition (2-1-1) the antioxidants and functional additives remaining in the state before use, as well as many of the altered components and impurities, and that the majority of the reclaimed oil composition (2-1-1) is composed of the base oil remaining in the state before the industrial oil composition was used.
  • the recycled industrial oil composition (2-1-1') was mixed so that the concentration of the neutral phosphite ester derivative was 0.1 mass%, the concentration of the 2,6-di-t-butylphenol derivative was 0.5 mass%, the concentration of the hindered amine compound was 0.1 mass%, and the concentration of the sulfurized oil and fat was 4 mass%.
  • a recycled oil composition (2-5-1) was produced from a used industrial oil composition (2-5').
  • a sulfur amount measurement step was carried out to measure the amount of sulfur in the used industrial oil composition (2-5').
  • the sulfur concentration in the used industrial oil composition (2-5') was 0.48 mass%.
  • 90 parts by mass of an adsorbent product name: Activated clay R-15, Japan Activated Clay Co., Ltd.
  • the adsorbent was separated by centrifugation to obtain a regenerated oil composition (2-5-1).
  • a sulfur content confirmation step was performed to measure the amount of sulfur in the regenerated oil composition (2-5-1).
  • the concentration of sulfur in the regenerated oil composition (2-5-1) was 0.32% by mass. It is believed that the adsorption treatment (amount of adsorbent used: 90 parts by mass) removed sulfur other than that derived from the base oil.
  • Example 2-1-1 the regenerated oil composition (2-5-1) was removed from many of the antioxidants and functional additives remaining in the state before use, as well as the altered components and impurity components, and is believed to be composed mostly of the base oil remaining in the state before the industrial oil composition was used.
  • the neutral phosphite derivative had a concentration of 0.1 mass%
  • the 2,6-di-t-butylphenol derivative had a concentration of 0.5 mass%
  • the hindered amine compound had a concentration of 0.1 mass%
  • the sulfurized oil and fat had a concentration of 1 mass%.
  • the industrial oil composition (2-5) before use and the recycled industrial oil composition (2-5-1') were measured for density (JIS K2249-1), flash point (JIS K2265-4), kinetic viscosity (40°C and 100°C, JIS K 2283), acid value (JIS K2501), copper plate corrosion test (JIS K2513), pressure resistance (ASTM D 2783), and friction coefficient (using a pendulum-type friction coefficient determination device).
  • the industrial oil composition (2-5) before use had a density of 0.876 g/ cm , a flash point of 218°C, a kinetic viscosity (40°C): 33 cSt, a kinetic viscosity (100°C): 5.6 cSt, an acid value of 0.01 mgKOH/g, a copper plate corrosion test of 1a, a pressure resistance of 200 kgf, and a friction coefficient of 0.14.
  • the recycled industrial oil composition (2-5-1') had a density of 0.874 g/ cm3 , a flash point of 202°C, a kinetic viscosity (40°C): 33 cSt, a kinetic viscosity (100°C): 5.6 cSt, an acid value of 0.01 mgKOH/g, a copper plate corrosion test of 1a, a pressure resistance of 200 kgf, and a friction coefficient of 0.12.
  • a density of 0.874 g/ cm3 a flash point of 202°C
  • a kinetic viscosity (100°C): 5.6 cSt an acid value of 0.01 mgKOH/g
  • a copper plate corrosion test of 1a a copper plate corrosion test of 1a
  • a pressure resistance of 200 kgf and a friction coefficient of 0.12.
  • the coloring of the recycled industrial oil composition (2-5-1') was slight. This shows that the recycled industrial oil
  • the production of the reclaimed oil composition was carried out in the same manner as in Example 1-1-1, except that the used industrial oil compositions (1-2') to (1-7'), (1-8'-1) to (1-8'-6), (1-9'-1) to (1-9'-6), (2-2') to (2-4'), (2-6'), and (2-7') were used.
  • the same types and amounts of antioxidants and functional additives as those in the industrial oil compositions before use were added to each of the recycled oil compositions to produce recycled industrial oil compositions.
  • mineral oil was used as an example of base oil.
  • synthetic oil, vegetable oil, or its derivatives e.g., hydrogenated vegetable oil and the above hydroisomerization reaction product
  • the same results as in the above examples were obtained.
  • the measured values of density, flash point, kinetic viscosity (40°C and 100°C), acid value, copper plate corrosion test, pressure resistance, and friction coefficient were compared for the industrial oil composition before use and the recycled industrial oil composition as in Example 2-5-1, and no changes were observed.
  • the color of the industrial oil composition before use and the recycled industrial oil composition were compared, the coloring of the recycled industrial oil composition was slight. This shows that the recycled industrial oil composition can be used for machine lubrication and metal processing.

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  • Combustion & Propulsion (AREA)
  • Lubricants (AREA)
PCT/JP2023/029246 2022-11-15 2023-08-10 再生油組成物の製造方法および再生工業油組成物の製造方法 Ceased WO2024105947A1 (ja)

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WO2026042369A1 (ja) * 2024-08-20 2026-02-26 株式会社日立製作所 油の再生装置、再生油の生産方法、添加剤及び吸着材のセット

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JPS6289796A (ja) * 1985-07-15 1987-04-24 ペトロ−カナダ　インク． 新規な組合せの安定化剤を含む潤滑油組成物
JPH06200285A (ja) * 1992-12-29 1994-07-19 Cosmo Sogo Kenkyusho:Kk 使用済潤滑油の再生処理方法
US5661117A (en) * 1995-04-14 1997-08-26 Dufresne; Peter Regeneration of phosphate ester lubricating fluids
JP2013147611A (ja) * 2012-01-23 2013-08-01 Toyota Motor Corp オイル添加物およびオイルフィルター
US20150001062A1 (en) * 2012-01-16 2015-01-01 Hydro Aluminium Deutschland Gmbh Method for Separating a Cooling Lubricant Agent from a Bearing Lubricant
JP2015034205A (ja) * 2013-08-08 2015-02-19 出光興産株式会社 再生処理用潤滑油組成物、及び潤滑油基油の製造方法
CN110317670A (zh) * 2019-03-19 2019-10-11 重庆众瑞晟科技有限责任公司 一种废润滑油再生利用的蒸馏过程中应用的阻焦剂及其制备方法

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JPS6289796A (ja) * 1985-07-15 1987-04-24 ペトロ−カナダ　インク． 新規な組合せの安定化剤を含む潤滑油組成物
JPH06200285A (ja) * 1992-12-29 1994-07-19 Cosmo Sogo Kenkyusho:Kk 使用済潤滑油の再生処理方法
US5661117A (en) * 1995-04-14 1997-08-26 Dufresne; Peter Regeneration of phosphate ester lubricating fluids
US5661117B1 (en) * 1995-04-14 2000-08-29 Peter Dufresne Regeneration of phosphate ester lubricating fluids
US20150001062A1 (en) * 2012-01-16 2015-01-01 Hydro Aluminium Deutschland Gmbh Method for Separating a Cooling Lubricant Agent from a Bearing Lubricant
JP2013147611A (ja) * 2012-01-23 2013-08-01 Toyota Motor Corp オイル添加物およびオイルフィルター
JP2015034205A (ja) * 2013-08-08 2015-02-19 出光興産株式会社 再生処理用潤滑油組成物、及び潤滑油基油の製造方法
CN110317670A (zh) * 2019-03-19 2019-10-11 重庆众瑞晟科技有限责任公司 一种废润滑油再生利用的蒸馏过程中应用的阻焦剂及其制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026042369A1 (ja) * 2024-08-20 2026-02-26 株式会社日立製作所 油の再生装置、再生油の生産方法、添加剤及び吸着材のセット

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