CN108359532A - A kind of method that gutter oil prepares electric insulation oil - Google Patents
A kind of method that gutter oil prepares electric insulation oil Download PDFInfo
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- CN108359532A CN108359532A CN201810137300.2A CN201810137300A CN108359532A CN 108359532 A CN108359532 A CN 108359532A CN 201810137300 A CN201810137300 A CN 201810137300A CN 108359532 A CN108359532 A CN 108359532A
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B13/00—Recovery of fats, fatty oils or fatty acids from waste materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
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Abstract
The present invention relates to renewable resources to recycle, fats and oils processing and Electric insulation material technical field, provides a kind of method that gutter oil prepares electric insulation oil.Including：Step 1: combination degumming；Step 2: decoloration removal of impurities；Step 3: vacuum strips；Step 4: compounding alkali refining；Step 5: washing removes soap；Step 6: dry fractionation.Combination degumming technique proposed by the invention effectively can remove hydrated phospholipid and non-hydratable phospholipid simultaneously, and degumming is efficient, and effect of settling is good, and contributes to the refining effect of subsequent technique；Vacuum strips and compounding alkali refining cooperation, and the acid value of grease can be greatly lowered；And dry fractionation, the condensation point of grease can be further decreased according to specific requirements.
Description
【Technical field】
The present invention relates to renewable resources to recycle, fats and oils processing and Electric insulation material technical field, especially relates to
And a kind of method that gutter oil prepares electric insulation oil.
【Background technology】
Gutter oil refers to the very poor unedible oil fat of quality, while also including the grease through repeatedly decocting, being discarded after fried food,
And oil-containing waste water, after oil water separator or oil separator separation, the grease that can not be eaten again of generation is conceptually returned
Belong to the scope of kitchen garbage.Therefore the management and improvement of gutter oil are very urgent, and urgent need finds rational gutter oil utilization and arranges
It applies, to promote the development of food security, it is ensured that human lives' health.
And insulating oil is as a kind of liquid insulating medium, is insulating materials important in oil-filled electric equipment, mineral insulation
Oil is widely used in the high voltage installation of oil immersion insulation because of its good electric insulating quality, cooling performance and cheap cost
In.But the burning point of mineral insulating oil is low, it is difficult to meet the manufacture requirement of high fire protecting performance electrical equipment, biodegradability
Difference, once leakage, which occurs, can pollute the soil and water source of surrounding, while its source petroleum resources is also increasingly in short supply.In these factors
Under the influence of, need to find one kind has a very big potentiality on oil sources is opened up, and burning point is high, a kind of New insulated that can be degradable
Oil.
Some researches show that vegetable insulating oils to have good electric property at present, and burning point is high, and biological degradation rate is good, meets
The requirement of electrical equipment fire protecting performance is the good environment-friendly liquid dielectric of the following alternative ore insulating oil.But plant
The refining of insulating oil generally requires good vegetable oil and does raw material, if mass production, be easy to cause shortage and the valence of edible oil
Lattice wave is dynamic.Cost of material is higher, determines that the insulating oil cost of refining is high, limits its application.
And conventional gutter oil refining treatment, it is extremely difficult to the requirement of electric insulation oil.If using esterification, hydrogenation
Etc. techniques, further relate to the factors such as the separation and recovery of catalyst, alcohol, increase operation difficulty.
In the prior art, number of patent application 200910103710.6,201010622031.2,201310086039.5,
201510620556.9 being for preparing environmentally friendly insulating oil from vegetable oil or edible oils with 201210353570.X several patents
Carried out the publicity of related art scheme.Wherein, preceding two patents are mainly the research to the refinement scheme of conventional plant oil,
Existing production cost is higher, there is lack of raw materials etc. that reasons analyze in the above content for its.Then three patents then with this
The theme of application prepares environmentally friendly insulating oil using gutter oil and is closely related, but above-mentioned three are individually present certain problem.
Such as：The document that number of patent application is 201310086039.5, wherein having referred only in the preparation method that it is used
The acid value of gutter oil is reduced the purpose is to neutralize the aliphatic acid to dissociate in ditch oil including depickling processing and decolorization, adsorbs color
Element and impurity.However, it carries out alkali neutralization reaction only with lye (sodium hydroxide and potassium hydroxide solution), it can make part
Neutral oil saponification, and the gleditsia sinensis sinking speed generated in neutralization reaction is slow, causes reaction time long, washes oil loss and increases,
And this method deacidification efficiency is limited, if wanting to drop to acid value extremely low, long-time alkali refining or multiple alkali refining need to be carried out, in increasing
Property oil loss, cause unnecessary waste, the acid value in embodiment also can difficulty be reduced to 0.06mgKOH/g hereinafter, not meeting
The relevant criterion of vegetable insulating oil requires (DT/T1360-2014, IEEEC57.147-2008, ASTM D6871-2003), thus
The final product quality of obtained insulating oil needs to be further improved.
The document that number of patent application is 201510620556.9, wherein it is mainly reaction kettle to obtain insulating oil process content
Then sodium hydroxide and EDTA is added in interior addition crude oil, being sufficiently stirred makes sodium hydroxide and EDTA be completely dissolved；Cycloalkanes is added
Acid, phosphate, sodium nitrite, triethanolamine, the stirring of phenylhydrazine triazole are warming up to 70 DEG C of progress homogeneous, are finally cooled to room temperature
Obtain insulating oil.For the preparation method, main purpose is to reduce insulating oil pour point and viscosity, but the progress of these substances is added
After chemical modification, it will influence the burning point of insulating oil, it is difficult to reach the requirement of fire resistant oil (300 DEG C of ＞).
Number of patent application is the document of 201210353570.X, wherein there is more detailed description for preparation process, it will
Low temperature dewaxing technique is placed on the first step, in order to improve condensation point.But not pretreated gutter oil, it directly carries out low
Temperature dewaxing, not only consumes energy larger, but also yield is relatively low, and there is also the gutter oils that can largely recycle in wax crystalline substance, for no other reason than that
The reasons such as impurity and crystallize in advance, if first carrying out degumming, removal of impurities, processing, the condensation point such as depickling can make moderate progress in fact.And
And will be mixed again with flowable oil after high wax point ester progress esterification, process complexity is increased, and esterification is related to
The recycling of catalyst, alcohol, burning point, flash-point the technical problems such as reduction.
In consideration of it, it is the art urgent problem to be solved to overcome the defect present in the prior art.
【Invention content】
The technical problem to be solved by the present invention is to refining treatments conventional in the prior art, are extremely difficult to electric insulation oil
Requirement.Further, the treatment process such as the depickling of use in the prior art and decoloration, there is no in view of in gutter oil
The middle influence there are glue constituents for the oil quality that insulate.Also, gutter oil usually all passes through high temperature frying or prolonged acid
It loses, not only acid value is high, and rich in a large amount of peptized impurities such as phosphatide, protein, mucilaginous substance and glycosyl diglycerides, influences essence
The technological effect of refining and deep processing.
The present invention adopts the following technical scheme that：
The present invention provides a kind of methods that gutter oil prepares electric insulation oil, including by staticly settling, float excludes
With the gutter oil of thick grade filtration treatment recycling, thick grade gutter oil is obtained, method further includes：
Step 1: combination degumming, including after the thick grade gutter oil is first preheating to 65 DEG C~75 DEG C, it is oil that quality, which is added,
The phosphoric acid or citric acid for weighing 0.05%~0.3% are stirred to react 20~60min postcoolings to 35~45 DEG C；Adding quality is
The NaOH solution of oily weight 3%~8%, concentration 3%~6% is heated to 65 DEG C~75 DEG C standings after being stirred to react 20~60min
After precipitation, lower layer's solution is released, is added 70 DEG C~80 DEG C, quality is soft water 20~30min of washing that oil weighs 3%~8%, and is subtracted
Press distillation dehydration；Obtain degummed oil；
Step 2: decoloration removal of impurities, be included in the degummed oil be added oil weigh 1~2% atlapulgite and 0.1~
0.2% activated carbon, decoloration oil temperature are set as 80~100 DEG C, and bleaching time is set as 20~30min, and vacuum degree is set as
0.08~0.094MPa, mixing speed are set as 15~35r/min, bleached oil are filtered out after the completion of decoloration；
Step 3: vacuum strips, including bleached oil is warming up to 200~250 DEG C, 0.097~0.1MPa of vacuum, directly steamed
Vapour dosage is the 3~5% of oily weight, 1~2h of air lift；Obtain stripped oil；
Step 4: compounding alkali refining, including configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45~75 DEG C；Keep oil temperature
At 40~70 DEG C, 5~10 DEG C of compounding lye higher than oil temperature is added, is stirred 20~30min, stands 2~6h, releases lower layer
Soap stock；Wherein, caustic dosage is determined according to the acid value of stripped oil in step 3；
Step 5: washing removes soap, including oil is warming up to 85~90 DEG C, is added 90~95 DEG C of soft water, washing 20~
1~3h is stood after 30min releases lower layer's soap stock, and vacuum distillation dehydration；
Step 6: after dry fractionation, including cooled to room temperature, start slow cooling, while cooperation mixes slowly 10
~15r/min, oil sample are cooled to after 10 DEG C, are quickly cooled to 0 DEG C, keep 12~for 24 hours；Then -15~18 DEG C are refrigerated to, together
Shi Peihe mixes slowly 10~20r/h, persistently stirs 1~2h after reaching set temperature, is finally obtained by filtration under heat-retaining condition
Insulating oil.
Preferably, the step 1 to step 6 is implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 65 DEG C, it is that oil weighs 0.2% that quality, which is added,
Phosphoric acid is stirred to react 30min postcoolings to 35 DEG C；It is the NaOH solution that oil weighs 5%, concentration 4% to add quality, is stirred to react
Be heated to after 30min 70 DEG C staticly settle after, after releasing lower layer solution, be added 75 DEG C, quality is the soft water washing that oil weighs 5%
30min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 30min, and vacuum degree is set as 0.08MPa, and mixing speed is set as 30r/min, is taken off
Bleached oil is filtered out after the completion of color；
250 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
5%, air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45 DEG C；It keeps oil temperature at 40 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；12 Baume degrees of concentration of lye, lye amount are oil weight
9%；
It is warming up to 85 DEG C in the step 5, by oil, 90 DEG C of soft water are added, 3h releasings lower layer is stood after washing 30min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 10r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 12h；Then -15 DEG C are refrigerated to, while coordinating the speed of 10r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Preferably, the step 1 to step 6 is implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, it is the phosphorus that oil weighs 0.1% that quality, which is added,
Acid is stirred to react 20min postcoolings to 40 DEG C；It is the NaOH solution that oil weighs 3%, concentration 4% to add quality, is stirred to react
Be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is the soft water washing that oil weighs 4%
20min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1.5% atlapulgite and 0.1% activated carbon,
Oil temperature of decolourizing is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.085MPa, and mixing speed is set as 30r/
Min filters out bleached oil after the completion of decoloration；
220 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3%, air lift 1.5h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；10 Baume degrees of concentration of lye, lye amount are oil weight
7%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 2h releasings lower layer is stood after washing 20min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -15 DEG C are refrigerated to, while coordinating the speed of 15r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Preferably, the step 1 to step 6 is implemented as：
In the step 1, after the thick grade trench is first preheating to 70 DEG C, it is the lemon that oil weighs 0.15% that quality, which is added,
Lemon acid is stirred to react 20min postcoolings to 45 DEG C；It is the NaOH solution that oil weighs 5%, concentration 3.5% to add quality, and stirring is anti-
Answer be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer's solution, be added 80 DEG C, quality is the soft water water that oil weighs 5%
Wash 30min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 2% atlapulgite and 0.2% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.09MPa, and mixing speed is set as 30r/min, is taken off
Bleached oil is filtered out after the completion of color；
240 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3.5%, air lift 1h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, adds
Enter to compound lye, be stirred 30min, stand 4h, releases lower layer's soap stock；7 Baume degrees of concentration of lye, lye amount are oil weight
6%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer is stood after washing 30min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -18 DEG C are refrigerated to, while coordinating the speed of 15r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Preferably, the step 1 to step 6 is implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, it is that oil weighs 0.05% that quality, which is added,
Phosphoric acid is stirred to react 40min postcoolings to 45 DEG C；It is the NaOH solution that oil weighs 3%, concentration 3% to add quality, is stirred to react
Be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is the soft water washing that oil weighs 4%
20min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.092MPa, and mixing speed is set as 30r/min,
Bleached oil is filtered out after the completion of decoloration；
200 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3%, air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 60 DEG C；It keeps oil temperature at 55 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；6 Baume degrees of concentration of lye, lye amount are oil weight
6%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer is stood after washing 20min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -12 DEG C are refrigerated to, while coordinating 10r/min's
Speed stirs, and persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Compared with prior art, the method that a kind of gutter oil proposed by the invention prepares electric insulation oil has with following
Beneficial effect：
Combination degumming technique proposed by the invention effectively can remove hydrated phospholipid and non-hydratable phospholipid, degumming simultaneously
Efficient, effect of settling is good, and contributes to the refining effect of subsequent technique；Vacuum strips and compounding alkali refining cooperation, can be substantially
Degree reduces the acid value of grease；And dry fractionation, the condensation point of grease can be further decreased according to specific requirements.
Further, the insulating oil good insulation preformance of preparation provided by the present invention, burning point is high, green environmental protection degradable,
The production application of electric insulation oil can be promoted.
Further, using the gutter oil of low cost as raw material, the environment-friendly electric insulating oil of high-flash, insulation performance are prepared
Good, recovery utilization rate is high, and process operability is strong.Electric insulation oil is made in gutter oil, can not only reduce gutter oil into food
Object chain ensures people's health；It can also turn waste into wealth, open up new application field, and reduce cost of material, promote electricity
The development of power insulating oil meets the trend of present energy shortages, meets the concept of economical environment-protective now.
【Description of the drawings】
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described.It should be evident that drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the flow diagram for the method that a kind of gutter oil provided in an embodiment of the present invention prepares electric insulation oil.
【Specific implementation mode】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, the fingers such as term "inner", "outside", " longitudinal direction ", " transverse direction ", "upper", "lower", "top", "bottom"
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention rather than
It is required that the present invention must be with specific azimuth configuration and operation, therefore it is not construed as limitation of the present invention.
In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other not
Conflict is constituted to can be combined with each other.
Embodiment 1:
The present invention provides a kind of methods that gutter oil prepares electric insulation oil, including by staticly settling, float excludes
With the gutter oil of thick grade filtration treatment recycling, thick grade gutter oil is obtained, as shown in Figure 1, method further includes：
Step 1: combination degumming, including after the thick grade gutter oil is first preheating to 65 DEG C~75 DEG C, it is oil that quality, which is added,
The phosphoric acid or citric acid for weighing 0.05%~0.3% are stirred to react 20~60min postcoolings to 35~45 DEG C；Adding quality is
The NaOH solution of oily weight 3%~8%, concentration 3%~6% is heated to 65 DEG C~75 DEG C standings after being stirred to react 20~60min
After precipitation, lower layer's solution is released, is added 70 DEG C~80 DEG C, quality is soft water 20~30min of washing that oil weighs 3%~8%, and is subtracted
Press distillation dehydration；Obtain degummed oil.
Step 2: decoloration removal of impurities, be included in the degummed oil be added oil weigh 1~2% atlapulgite and 0.1~
0.2% activated carbon, decoloration oil temperature are set as 80~100 DEG C, and bleaching time is set as 20~30min, and vacuum degree is set as
0.08~0.094MPa, mixing speed are set as 15~35r/min, bleached oil are filtered out after the completion of decoloration.
Step 3: vacuum strips, including bleached oil is warming up to 200~250 DEG C, 0.097~0.1MPa of vacuum, directly steamed
Vapour dosage is the 3~5% of oily weight, 1~2h of air lift；Obtain stripped oil.
Step 4: compounding alkali refining, including configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45~75 DEG C；Keep oil temperature
At 40~70 DEG C, 5~10 DEG C of compounding lye higher than oil temperature is added, is stirred 20~30min, stands 2~6h, releases lower layer
Soap stock；Wherein, caustic dosage is determined according to the acid value of stripped oil in step 3.
Step 5: washing removes soap, including oil is warming up to 85~90 DEG C, is added 90~95 DEG C of soft water, washing 20~
1~3h is stood after 30min releases lower layer's soap stock, and vacuum distillation dehydration.
Step 6: after dry fractionation, including cooled to room temperature, start slow cooling, while cooperation mixes slowly 10
~15r/min, oil sample are cooled to after 10 DEG C, are quickly cooled to 0 DEG C, keep 12~for 24 hours；Then -15~18 DEG C are refrigerated to, together
Shi Peihe mixes slowly 10~20r/h, persistently stirs 1~2h after reaching set temperature, is finally obtained by filtration under heat-retaining condition
Insulating oil.
The combination degumming technique that the embodiment of the present invention is proposed effectively can remove hydrated phospholipid and nonhydratable phosphorus simultaneously
Fat, degumming is efficient, and effect of settling is good, and contributes to the refining effect of subsequent technique；Vacuum strips and compounding alkali refining cooperation, can
The acid value of grease is greatly lowered；And dry fractionation, the condensation point of grease can be further decreased according to specific requirements.
Further, the insulating oil good insulation preformance of preparation provided by the present invention, burning point is high, green environmental protection degradable,
The production application of electric insulation oil can be promoted.
Further, using the gutter oil of low cost as raw material, the environment-friendly electric insulating oil of high-flash, insulation performance are prepared
Good, recovery utilization rate is high, and process operability is strong.Electric insulation oil is made in gutter oil, can not only reduce gutter oil into food
Object chain ensures people's health；It can also turn waste into wealth, open up new application field, and reduce cost of material, promote electricity
The development of power insulating oil meets the trend of present energy shortages, meets the concept of economical environment-protective now.
In the background technology that compares for each patent, the method and step of the embodiment of the present invention just exists for frame realization
The larger difference of following two points：It is the combination degumming step in step 1 first, for the influence ignored in the prior art
The harmful components that insulating oil refines so that finally refine obtained insulating oil performance more preferably；In addition, the embodiment of the present invention is only
The compounding alkali refining that one of step 4 is also carried out after the vacuum stripping of the step 3 of wound formula, to which last ring grasps acid
Content, the prior art that compares only at the beginning wait carry out depickling processing, have further optimization and improvement.
The refinement parameter value interval value given in each step given in the embodiment of the present invention 1 is to be directed to feasible scheme
The possibility interblock space of offer.And for different application scenarios, especially corresponding to different performance indicator parameters, there are one
Group or multigroup optimal refinement combining parameter values.Embodiment 2- embodiments 5 below are to be directed to above-mentioned various application scenarios
Under parameter index demand, optimal refinement combining parameter values provided, also, each embodiment has also been carried out by embodiment 6
Performance of the insulating oil of middle acquisition in each performance parameter test.
Embodiment 2:
A kind of mode to be administered refined combining parameter values and belong to the golden mean of the Confucian school in various embodiments of the present invention of the embodiment of the present invention,
Its such as burning point/DEG C, frequency breakdown voltage/kV, dielectric loss/%, pour point/DEG C, acid value mgKOH/g and kinematic viscosity (40
DEG C) in/performance parameter of (mm2/s) performance belong to intermediate scope, obtained insulating oil is suitable for more conventional demand
Field.Specifically, the method based on each step in embodiment 1 is realized, accordingly show as in embodiments of the present invention：
In the step 1, after the thick grade gutter oil is first preheating to 65 DEG C, it is the phosphorus that oil weighs 0.2% that quality, which is added,
Acid is stirred to react 30min postcoolings to 35 DEG C；It is the NaOH solution that oil weighs 5%, concentration 4% to add quality, is stirred to react
Be heated to after 30min 70 DEG C staticly settle after, after releasing lower layer solution, be added 75 DEG C, quality is the soft water washing that oil weighs 5%
30min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 30min, and vacuum degree is set as 0.08MPa, and mixing speed is set as 30r/min, is taken off
Bleached oil is filtered out after the completion of color；
250 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
5%, air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45 DEG C；It keeps oil temperature at 40 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；12 Baume degrees of concentration of lye, lye amount are oil weight
9%；
It is warming up to 85 DEG C in the step 5, by oil, 90 DEG C of soft water are added, 3h releasings lower layer is stood after washing 30min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 10r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 12h；Then -15 DEG C are refrigerated to, while coordinating the speed of 10r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Embodiment 3:
It is weaker that refinement combining parameter values to be administered of the embodiment of the present invention belong to characteristic performance in various embodiments of the present invention
A kind of mode, such as burning point/DEG C, frequency breakdown voltage/kV, dielectric loss/%, pour point/DEG C, acid value mgKOH/g and fortune
In the performance parameter of kinetic viscosity (40 DEG C)/(mm2/s), showed on burning point and frequency breakdown voltage worst, what is obtained is exhausted
Edge oil is suitable for requiring lower field to burning point and frequency breakdown voltage.Specifically, the method based on each step in embodiment 1
It realizes, accordingly shows as in embodiments of the present invention：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, it is the phosphorus that oil weighs 0.1% that quality, which is added,
Acid is stirred to react 20min postcoolings to 40 DEG C；It is the NaOH solution that oil weighs 3%, concentration 4% to add quality, is stirred to react
Be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is the soft water washing that oil weighs 4%
20min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1.5% atlapulgite and 0.1% activated carbon,
Oil temperature of decolourizing is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.085MPa, and mixing speed is set as 30r/
Min filters out bleached oil after the completion of decoloration；
220 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3%, air lift 1.5h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；10 Baume degrees of concentration of lye, lye amount are oil weight
7%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 2h releasings lower layer is stood after washing 20min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -15 DEG C are refrigerated to, while coordinating the speed of 15r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
For the embodiment that compares 2, refinement combining parameter values described in embodiment 3 not only compare on refining cost
There is increase to a certain extent for embodiment 2, also, the performance parameter for the insulating oil that combining parameter values are obtained is refined by it
Performance is not as good as the insulating oil in embodiment 2, therefore, for the embodiment that compares 2, refinement parameter value group described in embodiment 3
Conjunction belongs to occurrences option.It can see by the test experiments of embodiment 6,3 obtained insulating oil of the embodiment of the present invention is moving
Numerical value in terms of viscosity is that embodiment 2- is optimal in implementing 5.
Embodiment 4:
Refinement combining parameter values to be administered of the embodiment of the present invention belong to one kind the most outstanding in various embodiments of the present invention
Mode, such as burning point/DEG C, frequency breakdown voltage/kV, dielectric loss/%, pour point/DEG C, acid value mgKOH/g and movement it is viscous
It spends in the performance parameter of (40 DEG C)/(mm2/s), is showed on burning point, pour point and frequency breakdown voltage optimal, what is obtained is exhausted
Edge oil is suitable for burning point, pour point and the more demanding extreme career field of frequency breakdown voltage.Specifically, being based on embodiment 1
In each step method realize, accordingly show as in embodiments of the present invention：
In the step 1, after the thick grade trench is first preheating to 70 DEG C, it is the lemon that oil weighs 0.15% that quality, which is added,
Lemon acid is stirred to react 20min postcoolings to 45 DEG C；It is the NaOH solution that oil weighs 5%, concentration 3.5% to add quality, and stirring is anti-
Answer be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer's solution, be added 80 DEG C, quality is the soft water water that oil weighs 5%
Wash 30min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 2% atlapulgite and 0.2% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.09MPa, and mixing speed is set as 30r/min, is taken off
Bleached oil is filtered out after the completion of color；
240 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3.5%, air lift 1h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, adds
Enter to compound lye, be stirred 30min, stand 4h, releases lower layer's soap stock；7 Baume degrees of concentration of lye, lye amount are oil weight
6%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer is stood after washing 30min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -18 DEG C are refrigerated to, while coordinating the speed of 15r/h
Degree stirring, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Embodiment 5:
A kind of mode to be administered refined combining parameter values and belong to the golden mean of the Confucian school in various embodiments of the present invention of the embodiment of the present invention,
Its such as burning point/DEG C, frequency breakdown voltage/kV, dielectric loss/%, pour point/DEG C, acid value mgKOH/g and kinematic viscosity (40
DEG C) in/performance parameter of (mm2/s), showed in dielectric loss optimal, obtained insulating oil is suitable for dielectric loss
More demanding field.Specifically, the method based on each step in embodiment 1 is realized, accordingly show in embodiments of the present invention
For：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, it is that oil weighs 0.05% that quality, which is added,
Phosphoric acid is stirred to react 40min postcoolings to 45 DEG C；It is the NaOH solution that oil weighs 3%, concentration 3% to add quality, is stirred to react
Be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is the soft water washing that oil weighs 4%
20min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, takes off
Color oil temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.092MPa, and mixing speed is set as 30r/min,
Bleached oil is filtered out after the completion of decoloration；
200 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3%, air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 60 DEG C；It keeps oil temperature at 55 DEG C, adds
Enter to compound lye, be stirred 20min, stand 2h, releases lower layer's soap stock；6 Baume degrees of concentration of lye, lye amount are oil weight
6%；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer is stood after washing 20min
Soap stock, vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir
It mixes, oil sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -12 DEG C are refrigerated to, while coordinating 10r/min's
Speed stirs, and persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
Embodiment 6:
The embodiment of the present invention is for the insulation that refinement parameter combination obtains used by above-described embodiment 2- embodiments 5
Oil carries out that each performance parameter value is tested as a result, as shown in the table：
Specifeca tion speeification compares
Corresponding analysing content is illustrated accordingly in the above embodiments, can therefrom obtain each embodiment
In the realization method most preferably (considered from cost performance angle) belong to the refinement parameter combination that embodiment 4 proposed.It compares
For, there is also its own performance parameters outstanding for other each embodiments 3 and embodiment 5, are needing to be applied to respective performances
When the application scenarios of parameter request harshness, the corresponding insulating oil for refining parameter combination realization different performance performance can be selected
It refines.
As can be seen from the above embodiments, present invention process is simple, and operability is strong, and refining effect is good.The electric power of preparation
Insulating oil, burning point is high, excellent in insulation characteristic, can be widely used in the insulation application of power equipment, be used for example as transformer,
Insulation and cooling of cable, switch and capacitor etc. etc. are purpose liquid insulating medium.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of method that gutter oil prepares electric insulation oil, including by staticly settling, float excludes and thick grade filtration treatment
The gutter oil of recycling obtains thick grade gutter oil, which is characterized in that method further includes：
Step 1: combination degumming, including after the thick grade gutter oil is first preheating to 65 DEG C~75 DEG C, it is oil weight that quality, which is added,
0.05%~0.3% phosphoric acid or citric acid is stirred to react 20~60min postcoolings to 35~45 DEG C；It is oil to add quality
The NaOH solution for weighing 3%~8%, concentration 3%~6% is stirred to react after 20~60min and is heated to 65 DEG C~75 DEG C and staticly settles
Afterwards, lower layer's solution is released, is added 70 DEG C~80 DEG C, quality is soft water 20~30min of washing that oil weighs 3%~8%, and depressurizes steaming
Evaporate dehydration；Obtain degummed oil；
Step 2: decoloration removal of impurities, is included in and the atlapulgite and 0.1~0.2% that oil weighs 1~2% is added in the degummed oil
Activated carbon, decoloration oil temperature are set as 80~100 DEG C, and bleaching time is set as 20~30min, and vacuum degree is set as 0.08~
0.094MPa, mixing speed are set as 15~35r/min, bleached oil are filtered out after the completion of decoloration；
Step 3: vacuum strips, including is warming up to 200~250 DEG C, 0.097~0.1MPa of vacuum by bleached oil, direct steam is used
Amount is the 3~5% of oily weight, 1~2h of air lift；Obtain stripped oil；
Step 4: compounding alkali refining, including configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45~75 DEG C；Keep oil temperature 40
~70 DEG C, 5~10 DEG C of compounding lye higher than oil temperature is added, is stirred 20~30min, stands 2~6h, releases lower layer's soap
Foot；Wherein, caustic dosage is determined according to the acid value of stripped oil in step 3；
Step 5: washing removes soap, including oil is warming up to 85~90 DEG C, 90~95 DEG C of soft water are added, washed quiet after 20~30min
It sets 1~3h and releases lower layer's soap stock, and vacuum distillation dehydration；
Step 6: after dry fractionation, including cooled to room temperature, start slow cooling, at the same cooperation mix slowly 10~
15r/min, oil sample are cooled to after 10 DEG C, are quickly cooled to 0 DEG C, keep 12~for 24 hours；Then -15~18 DEG C are refrigerated to, simultaneously
Cooperation mixes slowly 10~20r/h, and 1~2h is persistently stirred after reaching set temperature, is finally obtained by filtration under heat-retaining condition absolutely
Edge oil.
2. the method that gutter oil according to claim 1 prepares electric insulation oil, which is characterized in that the step 1 to step
Rapid six are implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 65 DEG C, the phosphoric acid that addition quality weighs 0.2% for oil stirs
Reaction 30min postcoolings are mixed to 35 DEG C；It is the NaOH solution that oil weighs 5%, concentration 4% to add quality, after being stirred to react 30min
Be heated to 70 DEG C staticly settle after, after releasing lower layer solution, be added 75 DEG C, quality is that oil weighs 5% soft water and washes 30min, and
Vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, bleached oil
Temperature is 90 DEG C, and bleaching time is set as 30min, and vacuum degree is set as 0.08MPa, and mixing speed is set as 30r/min, has decolourized
Bleached oil is filtered out after；
250 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is the 5% of oily weight,
Air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 45 DEG C；It keeps oil temperature at 40 DEG C, is added multiple
With lye, it is stirred 20min, stands 2h, releases lower layer's soap stock；12 Baume degrees of concentration of lye, lye amount are the 9% of oily weight；
It is warming up to 85 DEG C in the step 5, by oil, 90 DEG C of soft water are added, 3h releasings lower layer soap stock is stood after washing 30min,
Vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 10r/min being coordinated to stir, oil
Sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 12h；Then -15 DEG C are refrigerated to, while the speed of 10r/h being coordinated to stir
It mixes, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
3. the method that gutter oil according to claim 1 prepares electric insulation oil, which is characterized in that the step 1 to step
Rapid six are implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, the phosphoric acid that addition quality weighs 0.1% for oil stirs
Reaction 20min postcoolings are mixed to 40 DEG C；It is the NaOH solution that oil weighs 3%, concentration 4% to add quality, after being stirred to react 30min
Be heated to 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is that oil weighs 4% soft water and washes 20min, and
Vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1.5% atlapulgite and 0.1% activated carbon, decolourizes
Oil temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.085MPa, and mixing speed is set as 30r/min, is taken off
Bleached oil is filtered out after the completion of color；
220 DEG C, vacuum 0.097MPa are warming up in the step 3, by bleached oil, direct steam dosage is the 3% of oily weight,
Air lift 1.5h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, is added multiple
With lye, it is stirred 20min, stands 2h, releases lower layer's soap stock；10 Baume degrees of concentration of lye, lye amount are the 7% of oily weight；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 2h releasings lower layer soap stock is stood after washing 20min,
Vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir, oil
Sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -15 DEG C are refrigerated to, while the speed of 15r/h being coordinated to stir
It mixes, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
4. the method that gutter oil according to claim 1 prepares electric insulation oil, which is characterized in that the step 1 to step
Rapid six are implemented as：
In the step 1, after the thick grade trench is first preheating to 70 DEG C, it is the citric acid that oil weighs 0.15% that quality, which is added,
20min postcoolings are stirred to react to 45 DEG C；It is the NaOH solution that oil weighs 5%, concentration 3.5% to add quality, is stirred to react
Be heated to after 30min 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is the soft water washing that oil weighs 5%
30min, and vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 2% atlapulgite and 0.2% activated carbon, bleached oil
Temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.09MPa, and mixing speed is set as 30r/min, has decolourized
Bleached oil is filtered out after；
240 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is oil weight
3.5%, air lift 1h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 50 DEG C；It keeps oil temperature at 45 DEG C, is added multiple
With lye, it is stirred 30min, stands 4h, releases lower layer's soap stock；7 Baume degrees of concentration of lye, lye amount are the 6% of oily weight；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer soap stock is stood after washing 30min,
Vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir, oil
Sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -18 DEG C are refrigerated to, while the speed of 15r/h being coordinated to stir
It mixes, persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
5. the method that gutter oil according to claim 1 prepares electric insulation oil, which is characterized in that the step 1 to step
Rapid six are implemented as：
In the step 1, after the thick grade gutter oil is first preheating to 75 DEG C, it is the phosphoric acid that oil weighs 0.05% that quality, which is added,
40min postcoolings are stirred to react to 45 DEG C；It is the NaOH solution that oil weighs 3%, concentration 3% to add quality, is stirred to react 30min
After be heated to 75 DEG C staticly settle after, after releasing lower layer solution, be added 80 DEG C, quality is that oil weighs 4% soft water and washes 20min,
And vacuum distillation dehydration；Obtain degummed oil；
Oil is added in the step 2, in the degummed oil and weighs 1% atlapulgite and 0.1% activated carbon, bleached oil
Temperature is 90 DEG C, and bleaching time is set as 20min, and vacuum degree is set as 0.092MPa, and mixing speed is set as 30r/min, decoloration
Bleached oil is filtered out after the completion；
200 DEG C, vacuum 0.098MPa are warming up in the step 3, by bleached oil, direct steam dosage is the 3% of oily weight,
Air lift 2h；Obtain stripped oil；
In the step 4, configuration NaOH and Na2SiO3Lye is compounded, is preheated to 60 DEG C；It keeps oil temperature at 55 DEG C, is added multiple
With lye, it is stirred 20min, stands 2h, releases lower layer's soap stock；6 Baume degrees of concentration of lye, lye amount are the 6% of oily weight；
It is warming up to 90 DEG C in the step 5, by oil, 95 DEG C of soft water are added, 1h releasings lower layer soap stock is stood after washing 20min,
Vacuum distillation dehydration after washing 2 times；
In the step 6, after cooled to room temperature, start slow cooling, while the speed of 15r/min being coordinated to stir, oil
Sample is cooled to after 10 DEG C, is quickly cooled to 0 DEG C, keeps 16h；Then -12 DEG C are refrigerated to, while coordinating the speed of 10r/min
Stirring persistently stirs 1h after reaching set temperature, insulating oil finally is obtained by filtration under heat-retaining condition.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109628213A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A method of transformer oil is prepared using vegetable oil |
| CN109628214A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A kind of process improving plant insulating transformer oil electric property |
| CN109628212A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A method of transformer oil is produced using kitchen waste grease |
| CN112725079A (en) * | 2020-11-11 | 2021-04-30 | 广东电网有限责任公司 | Decoloring process for producing kitchen waste grease-based natural ester insulating oil |
| CN113186031A (en) * | 2020-11-11 | 2021-07-30 | 广东电网有限责任公司 | Pour point depressing process for preparing kitchen waste grease-based natural ester insulating oil |
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| CN109628213A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A method of transformer oil is prepared using vegetable oil |
| CN109628214A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A kind of process improving plant insulating transformer oil electric property |
| CN109628212A (en) * | 2018-12-27 | 2019-04-16 | 安徽嘉旗粮油工程技术有限公司 | A method of transformer oil is produced using kitchen waste grease |
| CN112725079A (en) * | 2020-11-11 | 2021-04-30 | 广东电网有限责任公司 | Decoloring process for producing kitchen waste grease-based natural ester insulating oil |
| CN113186031A (en) * | 2020-11-11 | 2021-07-30 | 广东电网有限责任公司 | Pour point depressing process for preparing kitchen waste grease-based natural ester insulating oil |
| CN114045186A (en) * | 2021-10-29 | 2022-02-15 | 广东电网有限责任公司广州供电局 | Illegal cooking oil base insulating oil and preparation method thereof |
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| CN114045186B (en) * | 2021-10-29 | 2024-06-18 | 广东电网有限责任公司广州供电局 | Illegal cooking oil-based insulating oil and preparation method thereof |
| CN115197779A (en) * | 2022-06-23 | 2022-10-18 | 武汉泽电新材料有限公司 | Composite decoloring method for preparing electric insulating oil from deep-color kitchen waste grease |
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Application publication date: 20180803 |