CN106753689B - The method for improving oxidation stability of transformer oil - Google Patents
The method for improving oxidation stability of transformer oil Download PDFInfo
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- CN106753689B CN106753689B CN201611056437.2A CN201611056437A CN106753689B CN 106753689 B CN106753689 B CN 106753689B CN 201611056437 A CN201611056437 A CN 201611056437A CN 106753689 B CN106753689 B CN 106753689B
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- transformer oil
- hydrogenation catalyst
- method described
- isoparaffin
- nano
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 12
- 230000003647 oxidation Effects 0.000 title claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 37
- 238000005984 hydrogenation reaction Methods 0.000 claims abstract description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 239000011787 zinc oxide Substances 0.000 claims abstract description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 150000004325 8-hydroxyquinolines Chemical class 0.000 claims description 2
- 238000000975 co-precipitation Methods 0.000 claims description 2
- 238000001802 infusion Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 150000001924 cycloalkanes Chemical class 0.000 abstract description 7
- 230000003026 anti-oxygenic effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 61
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 5
- 235000006708 antioxidants Nutrition 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000002199 base oil Substances 0.000 description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011943 nanocatalyst Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- QZYDAIMOJUSSFT-UHFFFAOYSA-N [Co].[Ni].[Mo] Chemical compound [Co].[Ni].[Mo] QZYDAIMOJUSSFT-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- OUUQCZGPVNCOIJ-UHFFFAOYSA-N hydroperoxyl Chemical compound O[O] OUUQCZGPVNCOIJ-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical compound [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/02—Well-defined aliphatic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/04—Well-defined cycloaliphatic compounds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Catalysts (AREA)
Abstract
A method of oxidation stability of transformer oil is improved, is included in transformer oil and adds 3-10wt% isoparaffin and 0.5-5wt% nano hydrogenation catalyst；The carbon chain lengths of the cycloalkane are 5-30, preferably 8-20；The nano hydrogenation catalyst is the zinc oxide/alumina catalyst of nickel-loaded and cerium；The isoparaffin is that carbon chain lengths are 8-20, and preferably carbon chain lengths are 12-18；Additive amount in the transformer oil of the nano hydrogenation catalyst after treatment is preferably 1-2wt%；Additive amount in the transformer oil of the isoparaffin after treatment is preferably 5-8wt%.Transformer oil only needs that a small amount of nano hydrogenation catalyst and isoparaffin is added, so that it may greatly improve the anti-breakdown performance and anti-gassing property energy of transformer oil, have better antioxygenic property, extend the service life of transformer oil.
Description
Technical field
The present invention relates to the methods for improving oxidation stability of transformer oil, belong to transformer oil technical field.
Background technique
Transformer oil mainly plays insulation and heat spreading function in transformer, is important necessary to oil-immersed transformer manufacture
Basic material.Its quality is related to the safe operation and service life of transformer.Transformer oil in use, because
By the effect of temperature, electric field, oxygen and moisture and metal etc., occurs to aoxidize, crack and be carbonized etc. to react, generate certain oxidations
Product and its condensation product-greasy filth generate hydrogen and low molecular hydrocarbon gas and solid x are cured etc..This process is the bad of referred to as oil
Change.
Following reaction process can be briefly described into the deterioration principle of transformer oil.The electronic action generated in the electric field
Lower hydrocarbon molecule ionizes, and generates alkyl diradical, encounters the oxygen of dissolution in the oil and then generates more active peroxidating freedom
Base, peroxylradicals and hydrocarbon reaction generate hydroperoxide, are then being decomposed to form more free radicals, are making oxidation reaction
It continues, this using free free radical as the reaction of active centre is a kind of chain reaction, as long as there is feelings existing for free radical
Condition will continue to down the external world does not resupply energy response, and speed can be getting faster.Antioxidant (inertia is only added
Group) can just reaction chain be made to be broken.Therefore on the one hand the cracking that delay transformer oil will be added antioxidant and block free radical
On the other hand chain reaction needs to reduce the content of the impurity such as oxygen gas and water in transformer oil.
Since the oxidation resistance of transformer foundation oil itself is limited, it usually needs added in transformer oil suitable anti-
Oxidant extends the service life of transformer oil.But most of industrial antioxidant have potential environmental threat, part is anti-
Oxygen agent also has adverse effect for breakdown voltage and oil flow electrification.These all limit antioxidant makes in transformer oil
With.
In China's transformer oil standard, the main distinction of common transformer oil and ultrahigh voltage transformer oil is embodied in anti-analysis
Gas performance, while electric property also slightly improves.Ultrahigh voltage transformer oil needs in oil product due to improving anti-gassing property energy
Increase arene content, therefore the Oxidation Stability index of ultrahigh voltage transformer oil base oil decreases.That is, China
Ultrahigh voltage transformer oil be that its anti-gassing property energy is improved under the premise of sacrificing transformer oil base oil oxidation stability.
Nano modification transformer oil is a hot spot of transformer oil research in recent years.Studies have shown that nano particle can be with
Improve the thermal conductivity and heat transference efficiency of transformer oil；On the other hand, due to the interfacial effect under nanoscale, nano particle is not
But not the insulation performance for destroying transformer oil, helps to improve its compressive resistance instead；Some researches show that, nano material can be with
Its pressure-resistant performance is significantly improved in transformer oil ageing.There is presently no researchs to be used to improve transformer oil for nano material
Anti-aging property.
CN103113963 A discloses a kind of ultrahigh voltage transformer oil and its production technology.The EHV transformer
Oil includes the component of following mass concentration: naphthenic base oils 75wt%-85wt%, detergent alkylate 12wt%-22wt%, gold
Belong to deactivation agent 10-200ppm, light stabilizer 0.1wt%-3wt%.Compared with prior art, the ultrahigh voltage transformer oil is at low cost
It is honest and clean, formula and simple production process, but can not solve the problems, such as EHV transformer gassing.
CN1438299 A discloses a kind of anti-evolving-gas additive of transformer oil, with boiling point for 250 to 500 DEG C of petroleum distillates
For raw material, use cobalt-molybdenum, nickel-molybdenum, tungsten-nickel, in molybdenum-cobalt-nickel hydrogenation catalyst any one or any one with
On catalyst, carry out hydroprocessing technique；Secondly, by the generation oil after hydroprocessing technique, frequent pressure fractionating goes out boiling point and is
280 to 360 DEG C of fraction obtains anti-evolving-gas additive of transformer oil；Common transformation is added in anti-evolving-gas additive of transformer oil
Device oil is concocted to obtain superelevation transformer oil；The anti-evolving-gas additive really increases cycloalkane in transformer oil
Content, so that the electrical insulation properties of transformer oil be significantly increased.
Summary of the invention
The inventors discovered that addition has the active nanocatalyst of low temperature hydrogenation in transformer oil, can not only increase
The electrical insulation properties of strong transformer oil, and can use 50-150 DEG C of the activated at generated under transformer working environment
The reactivity of catalyst, the hydrogenation catalyst after activation not only can capture the hydroperoxyl radical to dissociate in transformer oil, with change
Unsaturated hydro carbons in depressor oil reacts, thus the chain reaction that blocking transformer oil deteriorates；It is generally believed that alkane inclines
Point is high, and it is the undesirable components of transformer oil especially ultrahigh voltage transformer oil that low temperature flow is poor, and anti-gassing ability is poor,
But the present inventor is found surprisingly that, after transformer oil is added in isoparaffin, association well can occur with nanocatalyst
Same-action, saturation isomerism alkane can provide hydrogen source for hydrogenation catalyst, accelerate the hydrogenation reaction of free radical, to reduce change
The gassing of depressor oil occurs, and extends the service life of transformer oil.
A method of oxidation stability of transformer oil is improved, addition 3-10wt% isoparaffin in transformer oil is included in
With 0.5-5wt% nano hydrogenation catalyst；The carbon chain lengths of the cycloalkane are 5-30, preferably 8-20；The nano hydrogenation
Catalyst is the zinc oxide/alumina catalyst of nickel-loaded and cerium；The isoparaffin is that carbon chain lengths are 8-20, preferably carbochain
Length is 12-18；Additive amount in the transformer oil of the nano hydrogenation catalyst after treatment is preferably 1-2wt%；It is described
Additive amount in the transformer oil of isoparaffin after treatment is preferably 5-8wt%.
The load capacity of nickel is 5-20wt% in the nano hydrogenation catalyst, and the load capacity of cerium is 0.1-0.5wt%, oxidation
The mass ratio of zinc and aluminium oxide is 1:0.2-1.
The content of aromatic hydrocarbons is lower than 10wt%, preferably less than 5wt%, more preferably less than 2wt% in the transformer oil,
Aromatic hydrocarbon can be even free of.
The nano hydrogenation catalyst partial size is 10-500nm, preferably 50-200nm.
The nano hydrogenation catalyst is modified by 8-hydroxyquinoline derivative surface.
The preparation method of the nano hydrogenation catalyst includes preparing the compound load of zinc oxide-alumina using coprecipitation
Then body uses infusion process supported catalyst active component nickel and cerium, calcine 10-24h at 300-500 DEG C finally to get institute
State nano hydrogenation catalyst.
The invention has the advantages that transformer oil only needs that a small amount of nano hydrogenation catalyst and isoparaffin is added, so that it may
To greatly improve the anti-breakdown performance and anti-gassing property energy of transformer oil, there is better antioxygenic property, extend transformer oil
Service life.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1:
Including 90wt% cycloalkane, 9wt% isoparaffin and 1wt% nano hydrogenation catalyst.
Embodiment 2:
Including 90wt% cycloalkane, 5wt% isoparaffin and 5wt% nano hydrogenation catalyst.
Comparative example 1:
Including 95wt% cycloalkane, 5wt% nano hydrogenation catalyst.
Comparative example 2:
Including 90wt% cycloalkane, 5wt% aromatic hydrocarbons and 5wt% nano hydrogenation catalyst.
To the transformer oil that embodiment and comparative example obtains, it is tested for the property, as a result as shown in the table:
The transformer oil that can be seen that while being added to nano hydrogenation catalyst and isoparaffin from above-mentioned experimental result is anti-
Ageing properties and anti-breakdown performance are more preferable, and are only added to the transformer oil of nanometer additive then performance is slightly secondary.This illustrates nanometer
Additive and isoparaffin have good synergistic effect, produce unexpected technical effect.
The above is only implementation examples of the invention, are not limited in any way to protection scope of the present invention.It is all to use this
The technical solution that equivalent replacement well known to field or equivalent exchange are formed, is within the scope of the present invention.
Claims (10)
1. it is a kind of improve oxidation stability of transformer oil method, be included in transformer oil add 3-10wt% isoparaffin and
0.5-5wt% nano hydrogenation catalyst；The nano hydrogenation catalyst is the zinc oxide/alumina catalyst of nickel-loaded and cerium；
The isoparaffin is that carbon chain lengths are 8-20；Additive amount in the transformer oil of the nano hydrogenation catalyst after treatment is
1-2wt%；Additive amount in the transformer oil of the isoparaffin after treatment is 5-8wt%；The nano hydrogenation catalyst
The load capacity of middle nickel is 5-20wt%, and the load capacity of cerium is 0.1-0.5wt%, and the mass ratio of zinc oxide and aluminium oxide is 1:0.2-
1。
2. according to the method described in claim 1, it is characterized in that it is 12-18 that the isoparaffin, which is carbon chain lengths,.
3. according to the method described in claim 1, it is characterized in that the content of aromatic hydrocarbons is lower than 10wt% in the transformer oil.
4. according to the method described in claim 3, it is characterized in that the content of aromatic hydrocarbons is lower than 5wt% in the transformer oil.
5. according to the method described in claim 4, it is characterized in that the content of aromatic hydrocarbons is lower than 2wt% in the transformer oil.
6. according to the method described in claim 5, it is characterized in that the transformer oil is free of aromatic hydrocarbon.
7. according to the method described in claim 1, it is characterized in that the nano hydrogenation catalyst partial size is 10-500nm.
8. according to the method described in claim 7, it is characterized in that the nano hydrogenation catalyst partial size is 50-200nm.
9. according to the method described in claim 1, it is characterized in that the nano hydrogenation catalyst passes through 8-hydroxyquinoline derivative
Surface is modified.
10. according to the method described in claim 1, it is characterized in that the preparation method of the nano hydrogenation catalyst includes using
Coprecipitation prepares zinc oxide-alumina complex carrier, then uses infusion process supported catalyst active component nickel and cerium, finally
10-24h is calcined at 300-500 DEG C to get the nano hydrogenation catalyst.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611056437.2A CN106753689B (en) | 2016-11-25 | 2016-11-25 | The method for improving oxidation stability of transformer oil |
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| CN201611056437.2A CN106753689B (en) | 2016-11-25 | 2016-11-25 | The method for improving oxidation stability of transformer oil |
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| CN106753689B true CN106753689B (en) | 2019-10-18 |
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| CN201611056437.2A Active CN106753689B (en) | 2016-11-25 | 2016-11-25 | The method for improving oxidation stability of transformer oil |
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| CN107418678A (en) * | 2017-06-26 | 2017-12-01 | 国网山东省电力公司荣成市供电公司 | A kind of renewable transformer oil |
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| EP1893729B1 (en) * | 2005-06-23 | 2019-04-10 | Shell International Research Maatschappij B.V. | Electrical oil formulation |
| CN102660363B (en) * | 2012-05-23 | 2013-10-16 | 上海中孚特种油品有限公司 | Transformer oil and preparation method thereof |
| CN103952214B (en) * | 2014-04-16 | 2016-01-20 | 江苏倍尔科技发展有限公司 | A kind of heat conducting nano aluminum oxide transformer oil |
| CN105038927A (en) * | 2015-07-06 | 2015-11-11 | 天门市天宝化工科技有限公司 | Composite modified nano particle transformer oil, and preparation method thereof |
| CN105602690B (en) * | 2016-01-29 | 2021-12-10 | 青岛哇咔咔科技有限公司 | Transformer oil with gas inhibition function |
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