JP2009054324A - 電気絶縁油及びその製造方法 - Google Patents
電気絶縁油及びその製造方法 Download PDFInfo
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- JP2009054324A JP2009054324A JP2007217482A JP2007217482A JP2009054324A JP 2009054324 A JP2009054324 A JP 2009054324A JP 2007217482 A JP2007217482 A JP 2007217482A JP 2007217482 A JP2007217482 A JP 2007217482A JP 2009054324 A JP2009054324 A JP 2009054324A
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 34
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 32
- 239000011593 sulfur Substances 0.000 claims abstract description 32
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 30
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 26
- 125000003118 aryl group Chemical group 0.000 claims abstract description 20
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010735 electrical insulating oil Substances 0.000 claims description 67
- 239000002199 base oil Substances 0.000 claims description 59
- -1 triazole compound Chemical class 0.000 claims description 11
- 239000013256 coordination polymer Substances 0.000 claims description 10
- 150000001412 amines Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000994 depressogenic effect Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 239000010779 crude oil Substances 0.000 description 16
- 239000003921 oil Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 7
- 150000002430 hydrocarbons Chemical group 0.000 description 7
- 101000823778 Homo sapiens Y-box-binding protein 2 Proteins 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 description 6
- 239000012964 benzotriazole Substances 0.000 description 5
- FCQAFXHLHBGGSK-UHFFFAOYSA-N 4-nonyl-n-(4-nonylphenyl)aniline Chemical compound C1=CC(CCCCCCCCC)=CC=C1NC1=CC=C(CCCCCCCCC)C=C1 FCQAFXHLHBGGSK-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 3
- YNLGQWRNZWQQMD-UHFFFAOYSA-N C(CCCCCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCCCCC)CCCCCCCCC)CCCCCCCCC Chemical compound C(CCCCCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCCCCC)CCCCCCCCC)CCCCCCCCC YNLGQWRNZWQQMD-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- LVZUNTGFCXNQAF-UHFFFAOYSA-N n-nonyl-n-phenylaniline Chemical compound C=1C=CC=CC=1N(CCCCCCCCC)C1=CC=CC=C1 LVZUNTGFCXNQAF-UHFFFAOYSA-N 0.000 description 3
- 239000002530 phenolic antioxidant Substances 0.000 description 3
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 150000001565 benzotriazoles Chemical class 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CLTHBVPJKLDVAS-UHFFFAOYSA-N 1,3-ditert-butyl-5-ethylbenzene Chemical compound CCC1=CC(C(C)(C)C)=CC(C(C)(C)C)=C1 CLTHBVPJKLDVAS-UHFFFAOYSA-N 0.000 description 1
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- OPLCSTZDXXUYDU-UHFFFAOYSA-N 2,4-dimethyl-6-tert-butylphenol Chemical compound CC1=CC(C)=C(O)C(C(C)(C)C)=C1 OPLCSTZDXXUYDU-UHFFFAOYSA-N 0.000 description 1
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 description 1
- LHPPDQUVECZQSW-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4,6-ditert-butylphenol Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC(N2N=C3C=CC=CC3=N2)=C1O LHPPDQUVECZQSW-UHFFFAOYSA-N 0.000 description 1
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 description 1
- ABMULKFGWTYIIK-UHFFFAOYSA-N 2-hexylphenol Chemical compound CCCCCCC1=CC=CC=C1O ABMULKFGWTYIIK-UHFFFAOYSA-N 0.000 description 1
- PFANXOISJYKQRP-UHFFFAOYSA-N 2-tert-butyl-4-[1-(5-tert-butyl-4-hydroxy-2-methylphenyl)butyl]-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(CCC)C1=CC(C(C)(C)C)=C(O)C=C1C PFANXOISJYKQRP-UHFFFAOYSA-N 0.000 description 1
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
- PRWJPWSKLXYEPD-UHFFFAOYSA-N 4-[4,4-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butan-2-yl]-2-tert-butyl-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(C)CC(C=1C(=CC(O)=C(C=1)C(C)(C)C)C)C1=CC(C(C)(C)C)=C(O)C=C1C PRWJPWSKLXYEPD-UHFFFAOYSA-N 0.000 description 1
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 description 1
- TVDZNGHKRSKPCD-UHFFFAOYSA-N 4-heptyl-n-(4-heptylphenyl)aniline Chemical compound C1=CC(CCCCCCC)=CC=C1NC1=CC=C(CCCCCCC)C=C1 TVDZNGHKRSKPCD-UHFFFAOYSA-N 0.000 description 1
- ZVVFVKJZNVSANF-UHFFFAOYSA-N 6-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]hexyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCCCCCCOC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 ZVVFVKJZNVSANF-UHFFFAOYSA-N 0.000 description 1
- WEYUPWIARAHDBV-UHFFFAOYSA-N C(C)C(CC=1C(=C(C=CC1)C)C=1N=NNC1CN)CCCC Chemical compound C(C)C(CC=1C(=C(C=CC1)C)C=1N=NNC1CN)CCCC WEYUPWIARAHDBV-UHFFFAOYSA-N 0.000 description 1
- DWLMIYNUGWGKQW-UHFFFAOYSA-N C(CCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCC)CCCC)CCCC Chemical compound C(CCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCC)CCCC)CCCC DWLMIYNUGWGKQW-UHFFFAOYSA-N 0.000 description 1
- WFHKDFKMMXNXBE-UHFFFAOYSA-N C(CCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCC)CCCCCC)CCCCCC Chemical compound C(CCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCC)CCCCCC)CCCCCC WFHKDFKMMXNXBE-UHFFFAOYSA-N 0.000 description 1
- QZHGURFFNXQTML-UHFFFAOYSA-N C(CCCCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCCCC)CCCCCCCC)CCCCCCCC Chemical compound C(CCCCCCC)C=1C(=C(C(=C(C=1)NC1=CC=CC=C1)CCCCCCCC)CCCCCCCC)CCCCCCCC QZHGURFFNXQTML-UHFFFAOYSA-N 0.000 description 1
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 1
- QAPVYZRWKDXNDK-UHFFFAOYSA-N P,P-Dioctyldiphenylamine Chemical compound C1=CC(CCCCCCCC)=CC=C1NC1=CC=C(CCCCCCCC)C=C1 QAPVYZRWKDXNDK-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- XUMOVISJJBHALN-UHFFFAOYSA-N n-butyl-n-phenylnaphthalen-1-amine Chemical compound C=1C=CC2=CC=CC=C2C=1N(CCCC)C1=CC=CC=C1 XUMOVISJJBHALN-UHFFFAOYSA-N 0.000 description 1
- VCQJSMBSGMLFKI-UHFFFAOYSA-N n-heptyl-n-phenylnaphthalen-1-amine Chemical compound C=1C=CC2=CC=CC=C2C=1N(CCCCCCC)C1=CC=CC=C1 VCQJSMBSGMLFKI-UHFFFAOYSA-N 0.000 description 1
- UMKFCWWZAONEEQ-UHFFFAOYSA-N n-nonyl-n-phenylnaphthalen-1-amine Chemical compound C=1C=CC2=CC=CC=C2C=1N(CCCCCCCCC)C1=CC=CC=C1 UMKFCWWZAONEEQ-UHFFFAOYSA-N 0.000 description 1
- RQVGZVZFVNMBGS-UHFFFAOYSA-N n-octyl-n-phenylaniline Chemical compound C=1C=CC=CC=1N(CCCCCCCC)C1=CC=CC=C1 RQVGZVZFVNMBGS-UHFFFAOYSA-N 0.000 description 1
- ZLNMGXQGGUZIJL-UHFFFAOYSA-N n-octyl-n-phenylnaphthalen-1-amine Chemical compound C=1C=CC2=CC=CC=C2C=1N(CCCCCCCC)C1=CC=CC=C1 ZLNMGXQGGUZIJL-UHFFFAOYSA-N 0.000 description 1
- NCEGDHPVRKYIJN-UHFFFAOYSA-N n-pentyl-n-phenylnaphthalen-1-amine Chemical compound C=1C=CC2=CC=CC=C2C=1N(CCCCC)C1=CC=CC=C1 NCEGDHPVRKYIJN-UHFFFAOYSA-N 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- 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
- C10M171/02—Specified values of viscosity or viscosity index
-
- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
-
- 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
- C10N2040/14—Electric or magnetic purposes
- C10N2040/16—Dielectric; Insulating oil or insulators
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
Abstract
【解決手段】流動点が-45℃以下であり、動粘度(40℃)が6〜10mm2/sであり、引火点(PM)が135℃以上であり、密度(20℃)が0.895kg/L以下であり、アニリン点が63〜90℃であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が5質量%以上であり、かつ酸化防止剤を0.05〜0.5質量%含有することを特徴とする電気絶縁油である。
【選択図】なし
Description
前記ナフテン系基油(N)と前記パラフィン系基油(P)との質量比(N/P)が95/5〜30/70であり、
前記ナフテン系基油は、%CNが55以上であり、%CPが40以下であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が5質量%以上30質量%未満であり、流動点が-50℃以下であり、動粘度(40℃)が7〜10mm2/sであり、かつ粘度指数が50以下であり、
前記パラフィン系基油は、%CPが60以上であり、%CNが40以下であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が3質量%未満であり、流動点が-30℃以下であり、動粘度(40℃)が6〜10mm2/sであり、かつ粘度指数が90以上であることを特徴とする。
(1)ナフテン系原油を水素化精製することにより、硫黄分が3質量ppm未満のナフテン系基油(%CN=62.2、%CP=32.9、硫黄分=1質量ppm未満、窒素分=1質量ppm未満、塩基性窒素=1質量ppm未満、芳香族分=17.1質量%、流動点=-57.5℃、動粘度(40℃)=8.820mm2/s、粘度指数=29)を得た。
次に、上記ナフテン系基油及び/又はパラフィン系基油を用い、以下のようにして実施例1〜4及び比較例1〜4の電気絶縁油を調製した。
上記(1)で得たナフテン系基油90質量%と上記(2)で得たパラフィン系基油10質量%との混合基油に、酸化防止剤として2,6-ジ-t-ブチル-4-メチルフェノール(DBPC)を0.3質量%添加して、電気絶縁油Aを調製した。
上記(1)で得たナフテン系基油80質量%と上記(2)で得たパラフィン系基油20質量%との混合基油に、酸化防止剤として2,6-ジ-t-ブチル-4-メチルフェノール(DBPC)を0.3質量%添加して、電気絶縁油Bを調製した。
実施例1で用いたのと同じ混合基油に、酸化防止剤として4,4'-ジノニルジフェニルアミン(ADPA)を0.3質量%添加して、電気絶縁油Cを調製した。
実施例1で調製した電気絶縁油Aに、更に帯電防止剤としてベンゾトリアゾール(BTA)を10質量ppm添加して、電気絶縁油Dを調製した。
上記(1)で得たナフテン系基油に、酸化防止剤として2,6-ジ-t-ブチル-4-メチルフェノール(DBPC)を0.3質量%添加して、電気絶縁油Eを調製した。
上記(1)で得たナフテン系基油20質量%と上記(2)で得たパラフィン系基油80質量%との混合基油に、酸化防止剤として2,6-ジ-t-ブチル-4-メチルフェノール(DBPC)を0.3質量%添加して、電気絶縁油Fを調製した。
上記(2)で得たパラフィン系基油に、酸化防止剤として2,6-ジ-t-ブチル-4-メチルフェノール(DBPC)を0.3質量%添加して、電気絶縁油Gを調製した。
上記(1)で得たナフテン系基油90質量%と上記(2)で得たパラフィン系基油10質量%とを混合して、電気絶縁油Hを調製した。
実施例及び比較例の電気絶縁油の特性の測定結果を表1及び2に示す。なお、表1及び表2に示す各物性は、次に示す試験方法に準じて求めた。
・動粘度、粘度指数:JIS K 2283
・流動点:JIS K 2269
・引火点(PM:ペンスキーマルテンス密閉式):JIS K 2265
・引火点(COC:クリーブランド開放式):JIS K 2265
・屈折率(20℃):JIS K 0062
・硫黄分:JIS K 2541(紫外蛍光法)
・窒素分:JIS K 2609
・塩基性窒素分:米国UOP社試験法(UOP Method)No. 313-70「Nitrogen Bases in Distillates by Indicator Titration」で規定する方法
・n-d-M環分析(%CA, %CN, %CP):ASTM D3238
・芳香族分:ASTM D2007
・酸化安定性(RPVOT(140℃)):ASTM D2112
・絶縁破壊電圧(BDV):JIS C 2101
・体積抵抗率:JIS C 2101
・誘電正接:JIS C 2101
・腐食性硫黄:ASTM D1275−06(Method B:150℃、48時間)
Claims (4)
- 流動点が-45℃以下であり、動粘度(40℃)が6〜10mm2/sであり、引火点(PM)が135℃以上であり、密度(20℃)が0.895kg/L以下であり、アニリン点が63〜90℃であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が5質量%以上であり、かつ酸化防止剤を0.05〜0.5質量%含有することを特徴とする電気絶縁油。
- 前記酸化防止剤がフェノール系酸化防止剤及び/又はアミン系酸化防止剤であることを特徴とする請求項1に記載の電気絶縁油。
- 更に、トリアゾール化合物の1種以上を合計で1000質量ppm以下含有することを特徴とする請求項1又は2に記載の電気絶縁油。
- ナフテン系基油とパラフィン系基油とを混合する工程を含む請求項1に記載の電気絶縁油の製造方法であって、
前記ナフテン系基油(N)と前記パラフィン系基油(P)との質量比(N/P)が95/5〜30/70であり、
前記ナフテン系基油は、%CNが55以上であり、%CPが40以下であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が5質量%以上30質量%未満であり、流動点が-50℃以下であり、動粘度(40℃)が7〜10mm2/sであり、かつ粘度指数が50以下であり、
前記パラフィン系基油は、%CPが60以上であり、%CNが40以下であり、硫黄分が3質量ppm未満であり、窒素分が3質量ppm以下であり、塩基性窒素が1質量ppm以下であり、芳香族分が3質量%未満であり、流動点が-30℃以下であり、動粘度(40℃)が6〜10mm2/sであり、かつ粘度指数が90以上であることを特徴とする電気絶縁油の製造方法。
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