EP1092760B1 - Lubricant for vapor compression refrigerator using hydrocarbon coolant - Google Patents

Lubricant for vapor compression refrigerator using hydrocarbon coolant Download PDF

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Publication number
EP1092760B1
EP1092760B1 EP00909736A EP00909736A EP1092760B1 EP 1092760 B1 EP1092760 B1 EP 1092760B1 EP 00909736 A EP00909736 A EP 00909736A EP 00909736 A EP00909736 A EP 00909736A EP 1092760 B1 EP1092760 B1 EP 1092760B1
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EP
European Patent Office
Prior art keywords
lubricant
mineral oil
fluid composition
refrigeration system
hydrocarbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP00909736A
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German (de)
English (en)
French (fr)
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EP1092760A1 (en
EP1092760A4 (en
Inventor
Takashi Japan Energy Corp. KAIMAI
Hitoshi Japan Energy Corp. TAKAHASHI
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Eneos Corp
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Japan Energy Corp
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • 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
    • 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
    • C10M129/14—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring containing at least 2 hydroxy groups
    • 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
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
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    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • C10M171/008—Lubricant compositions compatible with refrigerants
    • C—CHEMISTRY; METALLURGY
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
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    • C10M2203/1025—Aliphatic fractions used as base material
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/104—Aromatic fractions
    • C10M2203/1045—Aromatic fractions used as base material
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/106—Naphthenic fractions
    • C10M2203/1065—Naphthenic fractions used as base material
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    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/108—Residual fractions, e.g. bright stocks
    • C10M2203/1085—Residual fractions, e.g. bright stocks used as base material
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    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
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    • C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
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    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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    • C10M2207/027—Neutral salts thereof
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    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
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    • C10M2215/065—Phenyl-Naphthyl amines
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    • C10M2215/066—Arylene diamines
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/36—Release agents or mold release agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/38—Conveyors or chain belts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/40—Generators or electric motors in oil or gas winning field
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/42—Flashing oils or marking oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/44—Super vacuum or supercritical use
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/50—Medical uses

Definitions

  • the present invention relates to a working fluid composition comprising a hydrocarbon refrigerant and a lubricant for a compression type refrigeration system in which a hydrocarbon refrigerant is used, which does not have the fear of ozone layer depletion, and which comprises a lower hydrocarbon having global warming ability that is much lower than that of a halogen-containing hydrocarbon refrigerant. Further, the present invention relates to a refrigeration system which is filled with the working fluid composition.
  • a compression type refrigeration system is constructed by a compressor, a condenser, an expansion mechanism (such as an expansion valve), an evaporator and others, and conducts refrigeration by utilizing such a property that when a refrigerant with high volatility evaporates, the refrigerant robs evaporation heat from the circumference.
  • the compression type refrigeration system is used in a refrigerator, a freezer, an air conditioner, a showcase, a vending machine of beverages or ice creams, and the like. In the case of air conditioner, vendingmachine, and the like, by utilizing heat generated upon condensing, room heating or heating and maintaining of the beverages or foods is carried out.
  • chlorine-containing chlorofluorocarbons or hydrochlorofluorocarbons such as trichlorofluoromethane (R11), dichlorodifluoromethane (R12) or chlorodifluoromethane (R22) have been used as the refrigerants.
  • JP-A-580 764 97 describes a refrigerator oil for use with a chlorofluorocarbon as a refrigerant.
  • US-A-4 983 313 describes a refrigerating machine oil composition comprising an alkyl benzene, a paraffin-based mineral oil and a naphthene-based mineral oil.
  • HFC non-chlorine type hydrofluorocarbons
  • R32 difluoromethane
  • R134 or R134a tetrafluoroethane
  • R152 or R152a difluoroethane
  • naphthene type or paraffin type mineral oils and synthetic oils such as alkylbenzene oil, ether oil, ester oil or fluorine oil are exemplified as the lubricants for refrigerants including the above-mentioned hydrocarbons.
  • synthetic oils are generally expensive. Therefore, mineral oils, which are inexpensive and are easily available, are expected from the standpoint practical use.
  • Low molecular weight hydrocarbons as the refrigerant and mineral oils as the lubricant have compatibility. However, if their gravity difference is large, there may be the case where it is difficult for them to be mixed by only spontaneous diffusion. In a refrigeration system, it frequently happens that those are placed in the state being difficult to be mixed each other. For example, in case of filling a refrigerant in a compressor, there occurs a state that a refrigerant with relatively low density is deposited on a lubricant with high density, which is already filled. Further, this state also occurs when the refrigerant returns into a compressor in the state of liquid during stop of the compressor, i.e., in the case of a so-called flooding.
  • the lubricant gathers outside of rotation by a centrifugal force, and the lubricant does not sufficiently reach a sliding portion such as an inner bearing that requires lubrication. As a result, there is a problem that abrasion occurs at a sliding portion, or seizure easily occurs. For this reason, as a lubricant for a refrigeration system using a low molecular weight hydrocarbon refrigerant, a lubricant with excellent lubricating properties is required and eagerly desired. Further, a chlorine type fluorinated hydrocarbon refrigerant may exert an extreme pressure effect due to chlorine present in the molecule.
  • a hydrocarbon refrigerant itself has a low molecular weight, and therefore a lubricating performance is not expected at all. This also promotes the need to require excellent lubricating properties for a lubricant for a refrigeration system using a hydrocarbon refrigerant.
  • the lubricants for a refrigeration system are exposed to a refrigeration cycle where high temperature and low temperature always repeat, even though they are generally used in a closed system. For this reason, a lubricant having good stability and durability is desired.
  • the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide working fluid compositions comprising lubricants for a refrigeration system using a low molecular weight hydrocarbon refrigerant, the lubricant having excellent compatibility with the hydrocarbon refrigerant, excellent lubricating properties and stability.
  • the inventors of the present invention carried out extensive investigations and discussions on mineral oil type lubricants having good compatibility with a hydrocarbon refrigerant, and have found that lubricants comprising as a main component a mineral oil having specific physical properties and the composition has excellent compatibility with a hydrocarbon refrigerant and is excellent in stability and lubricating properties in the presence of a hydrocarbon refrigerant, and have completed the present invention.
  • the present invention is a working fluid composition
  • a lubricant for a refrigeration system using a hydrocarbon refrigerant wherein the lubricant comprises as a main component a mineral oil having a kinematic viscosity at 40°C of 5-150 mm 2 /s(cSt), a pour point of -25°C or lower, a viscosity index of 50 or higher, %C P and %C A by n-d-M ring analysis of 50 or more and 12 or less, respectively, a nitrogen content of 20 ppm or lower, a sulfur content of 0.02-0.3% and an iodine value of 10 gI 2 /100 g or lower.
  • the working fluid composition for a compression type refrigeration system comprises at least one kind of hydrocarbon refrigerants comprising hydrocarbon compounds having 1-5 carbon atoms.
  • the present invention is a refrigeration system filling the working fluid composition.
  • lubricant ones further containing extreme pressure agents comprising phosphate, and/or phenol type or amine type antioxidants are preferable.
  • the lubricant comprising as a main component such a mineral oil has excellent compatibility with the hydrocarbon refrigerant, has high abrasion resistance regarding to a compressor slidingmember, and further shows excellent stability.
  • the mineral oil used in the lubricant of the present invention has a kinematic viscosity at 40°C of 3-150 mm 2 /s. If the kinematic viscosity is low, sealing property and lubricity decrease in a compressor, whereas if it becomes high, a pour point is too high, or energy efficiency lowers. Preferably, it is 5-100 mm 2 /s.
  • the mineral oil has a pour point of -25°C or lower. If the pour point is too high, the fluidity of the lubricant discharged from a compressor together with a refrigerant decreases in an expansion mechanism or an evaporator, and the lubricant deposits at a low temperature part of refrigeration system. This may result in decrease of heat transfer efficiency or causing abrasion or seizure of bearing due to shortage of lubricant in the compressor.
  • the mineral oil has a viscosity index of 50 or more.
  • the lubricant In a refrigeration cycle, the lubricant has high temperature at discharge of a compressor, and is then exposed to low temperature at an outlet of an expansion mechanism. Thus, the lubricant is used in relatively wide temperature range. Therefore, a lubricant having high viscosity index that is small in viscosity change depending on the temperature, i.e., a mineral oil having high viscosity' index, is desired.
  • a lubricant containing a large amount of long-chain hydrocarbons has high viscosity index, resulting in increasing lubricating performance. Viscosity index of the mineral oil is more preferably 80 or more.
  • the mineral oil has %C P and %C A by n-d-M ring analysis of 50 or more and 12 or less, respectively.
  • the lubricity of the lubricant increases as the amount of chain hydrocarbons in the lubricant increases, in other words, as a mineral oil having larger %C P value is used. Therefore, sufficient lubricity can be maintained even if the lubricant is diluted with low molecular weight hydrocarbon refrigerants having poor lubricating properties, and abrasion or seizure of bearing is difficult to occur.
  • %C P is preferably 80 or more. Further, the value of %C A greatly affects the viscosity index, and if it is large, the viscosity index decreases, which is not preferable.
  • %C A is preferably 10 or less.
  • %C P and %C A can be determined by n-d-M ring analytical method defined in ASTM D3238.
  • nitrogen content and sulfur content contained in mineral oil influence characteristics of the lubricant. If the nitrogen content exceeds 20 ppm by weight, color stability deteriorates. Therefore, the nitrogen content is 20 ppm by weight or less. Further, the sulfur content is 0.02-0.3% by weight, preferably 0.02-0.1% by weight. If the sulfur content is large, corrosion property increases, and if it is small, its lubricity decreases. Therefore, it is important to keep the sulfur content in the above-mentioned range.
  • iodine value of the mineral oil used in the lubricant for refrigeration system of the present invention is 10 gI 2 /100 g or less in order to secure stability to deterioration. If the iodine value exceeds 10 gI 2 /100 g, stability deteriorates.
  • the hydrocarbon refrigerant used with the lubricant of the present invention is low molecular weight hydrocarbon compounds having 1-5 carbon atoms. Specific examples thereof include alkane compounds such as methane, ethane, propane, n-butane, i-butane, n-pentane, i-pentane or neopentane, and cycloparaffin compounds such as cyclopropane, cyclobutane or cyclopentane. Further, derivatives of the above-mentioned compounds in which a part of carbon bonds is a double bond (olefins corresponding to the above-mentioned compounds) can also be used. As the hydrocarbon refrigerant, those compounds can be used alone or as mixtures appropriately mixing two kinds or more.
  • the effect of the present invention is exhibited by using the mineral oil having above-mentioned physical properties to the compression type refrigeration system using low molecular weight hydrocarbon refrigerant. That is, the above-mentioned mineral oil shows the above-mentioned good lubricating property and stability in the presence of hydrocarbon refrigerant, and also shows good compatibility because the mineral oil has a molecular structure very similar to that of the hydrocarbon refrigerant as compared with ester oils or ether oils. Further, the mineral oil is inexpensive as compared with ester oils or ether oils, and therefore is very useful in practical aspect.
  • the lubricant of the working fluid composition of the present invention may optionally contain other components, if necessary.
  • conventional lubricant base oils for refrigeration system such as mineral oils other than the above-mentioned mineral oils used in the present invention (e.g., naphthene type mineral oils), or synthetic oils (e.g., alkylbenzene oils, ether oils, ester oils or fluorinated oils) and conventional additives may appropriately be compounded.
  • additives examples include phenol type or amine type antioxidants such as 2,6-di-tertiary-butylphenol, 2,6-di-tertiary-butyl-p-cresol, 4,4-methylene-bis-(2,6-di-tertiary-butyl-p-cresol) or p,p'-di-octyl-di-phenylamine, stabilizers such as phenyl glycidyl ether or alkyl glycidyl ether, extreme pressure agents such as tricresyl phosphate or triphenyl phosphate, oilness agents such as glycerin monooleate , glycerin monooleyl ether or glycerin monolauryl ether, metal inactivators such as benzotriazole, and defoamers such as polydimethyl siloxane or polymethacryl acrylate.
  • antioxidants such as 2,6-di-tertiary-butyl
  • additives such as dispersants, viscosity index improvers, rust inhibitors, corrosion inhibitors or pour point depressants can also optionally be compounded.
  • Those additives may be mixed with the lubricant of the working fluid composition of the present invention in an amount of generally about 10 ppm to 10% by weight.
  • phenol type or amine type antioxidant is added in an amount of about 0.01-0.5% by weight, stability and durability of the lubricant are greatly improved.
  • phosphates such as tricresyl phosphate or triphenyl phosphate are useful as an extreme pressure agent, and its addition in very small amount (e.g., 0.05-1.0% by weight) effectively improves lubricating properties such as seizure load or abrasion resistance.
  • mineral oils 1-8 and hard type alkyl benzenes (HAB) 1-2 having physical properties and compositions shown in Table 1 and 2, respectively, were prepared, and used in evaluation tests described after.
  • mineral oils 1-3 and 6 correspond to a base oil of the lubricant of the working fluid composition of the present invention.
  • HAB 1 2 Color (ASTM) L0.5 L0.5 Kinematic viscosity (mm 2 /s) 14.97 9.99 Viscosity index -14 5 %C P - - %C A - - Pour point (°C) ⁇ -50.0 ⁇ -50.0 Nitrogen content (wtppm) ⁇ 1 ⁇ 1 Sulfur content (wt%) ⁇ 0.01 ⁇ 0.01 Total acid value (mgKOH/g) 0.01 0.01 Iodine value (gI 2 /100 g) - - " ⁇ XX" means less than XX.
  • Base oils of mineral oils 1-4 and HAB 1-2 were used as a lubricant, i-butane (R600a) was used as a refrigerant, and performance evaluation tests such as practical performance, lubricating property (Falex seizure load) and compatibility with refrigerant were conducted.
  • the performance evaluation test of practical performance of lubricant was conducted by durability test by using refrigeration cycle containing a compressor for refrigerator. That is, 200 g of each lubricant comprising the above-mentioned base oil and 15 g of R600a refrigerant were charged in the compressor, and operation was conducted for 1000 hours while maintaining compressor delivery pressure of 12 kgf/cm 2 and a compressor surface temperature of 80°C. After completion of the durability test, the compressor was opened. The lubricant after test, i.e., used oil, was sampled, and color and total acid value were measured. Further, the compressor was disassembled, and abrasion amount of piston, cylinder, connecting rod and bearing were measured.
  • the lubricants of the present invention showed that color was low as L1.0, total acid value was 0.01 mgKOH/g that was unchanged from the value of new oil, and abrasion amount of members (piston, cylinder, connecting rod and bearing) of compressor was all 1.0 ⁇ m or less. Contrary to this, mineral oil 4 and HAB 1-2, corresponding to comparative examples had almost all values being larger than those of the above examples, and deterioration of lubricant and abrasion of compressor members were observed.
  • the lubricants of the working fluid composition of the present invention showed satisfactory stability in all items, but the lubricants that do not satisfy any one or a plurality of values specified in this invention regarding viscosity index, %C P , nitrogen content, sulfur content % and iodine value (mineral oils 4-5 and 7-8) showed that color was poor as L2.0 or more, and discoloration of catalyst and precipitation of sludge were observed.
  • TCP tricresyl phosphate
  • DBPC 2,6-di-tertiary butyl-p-cresol
  • Test oils 1 2 3 Additive and its amount added (wt%) Antioxidant (DBPC) 0.5 - 0.5 Extreme pressure agent (TCP) - 0.1 0.1 Bomb test Color (ASTM) L1.5 L1.5 L1.5 Discoloration of catalyst Fe None None None Cu None None None Al None None None Sludge formation None None None Mineral oil 1 was used as a base oil.
  • DBPC Antioxidant
  • TCP Extreme pressure agent
  • ASTM Bomb test Color
  • the lubricant for the working fluid composition for a refrigeration system of the present invention is a lubricant comprising as a main component a mineral oil having specific physical properties and composition, so that it is excellent in compatibility with hydrocarbon refrigerants and also excellent in stability and lubricating properties under the presence of hydrocarbon refrigerants. Therefore, it is very useful as a lubricant for a refrigeration system using friendly hydrocarbon refrigerant to earth environment.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Lubricants (AREA)
EP00909736A 1999-04-02 2000-03-17 Lubricant for vapor compression refrigerator using hydrocarbon coolant Expired - Lifetime EP1092760B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9667599 1999-04-02
JP9667599 1999-04-02
PCT/JP2000/001675 WO2000060031A1 (fr) 1999-04-02 2000-03-17 Refrigerateur a compression de vapeur dans lequel une substance de refroidissement hydrocarbonee est utilisee

Publications (3)

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EP1092760A1 EP1092760A1 (en) 2001-04-18
EP1092760A4 EP1092760A4 (en) 2002-07-31
EP1092760B1 true EP1092760B1 (en) 2005-02-09

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EP (1) EP1092760B1 (es)
JP (1) JP3933872B2 (es)
KR (1) KR100648186B1 (es)
CN (1) CN1183236C (es)
DE (1) DE60018005T2 (es)
ES (1) ES2233339T3 (es)
WO (1) WO2000060031A1 (es)

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JP3963311B2 (ja) * 2002-06-14 2007-08-22 株式会社ジャパンエナジー 冷凍機油組成物
JP4012441B2 (ja) * 2002-07-11 2007-11-21 株式会社ジャパンエナジー 冷媒圧縮式冷凍サイクル装置用潤滑油及び作動媒体
US8083965B2 (en) 2004-03-04 2011-12-27 Nippon Oil Corporation Refrigerating machine oil
JP4659373B2 (ja) * 2004-03-04 2011-03-30 Ｊｘ日鉱日石エネルギー株式会社 冷凍機油
EP2039746B1 (en) 2006-07-06 2013-10-09 Nippon Oil Corporation Refrigerator oil composition
JP5379345B2 (ja) * 2006-07-06 2013-12-25 Ｊｘ日鉱日石エネルギー株式会社 潤滑油組成物
JP4865428B2 (ja) * 2006-07-06 2012-02-01 Ｊｘ日鉱日石エネルギー株式会社 圧縮機油組成物
JP2008013677A (ja) * 2006-07-06 2008-01-24 Nippon Oil Corp 冷凍機油
JP5318358B2 (ja) * 2007-03-27 2013-10-16 Ｊｘ日鉱日石エネルギー株式会社 炭化水素冷媒用冷凍機油及びそれを用いた冷凍機システム
JP5550665B2 (ja) * 2012-02-08 2014-07-16 Ｊｘ日鉱日石エネルギー株式会社 冷凍機油
JP6195429B2 (ja) 2012-03-29 2017-09-13 Ｊｘｔｇエネルギー株式会社 冷凍機用作動流体組成物及び冷凍機油
JP2013209569A (ja) * 2012-03-30 2013-10-10 Jx Nippon Oil & Energy Corp 潤滑油組成物
CN106543964B (zh) * 2012-08-23 2020-03-03 中化蓝天集团有限公司 适用于hfc-161和含hfc-161混合工质的稳定剂组合物
JP5551295B2 (ja) * 2013-06-12 2014-07-16 Ｊｘ日鉱日石エネルギー株式会社 炭化水素冷媒用冷凍機油及びそれを用いた冷凍機システム
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JP2019104778A (ja) * 2017-12-08 2019-06-27 Ｊｘｔｇエネルギー株式会社 冷凍機油及び冷凍機用作動流体組成物
WO2023073826A1 (ja) 2021-10-27 2023-05-04 友光商事株式会社 冷媒圧縮式冷凍サイクル装置用作動媒体および該作動媒体を用いた冷凍サイクル装置

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JP3933872B2 (ja) 2007-06-20
WO2000060031A1 (fr) 2000-10-12
DE60018005D1 (de) 2005-03-17
KR20010052428A (ko) 2001-06-25
KR100648186B1 (ko) 2006-11-23
EP1092760A1 (en) 2001-04-18
DE60018005T2 (de) 2005-12-29
ES2233339T3 (es) 2005-06-16
EP1092760A4 (en) 2002-07-31
CN1297472A (zh) 2001-05-30
CN1183236C (zh) 2005-01-05

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