CN104694219A - Production method for high-grade naphthenic transformer oil - Google Patents
Production method for high-grade naphthenic transformer oil Download PDFInfo
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- CN104694219A CN104694219A CN201310655136.1A CN201310655136A CN104694219A CN 104694219 A CN104694219 A CN 104694219A CN 201310655136 A CN201310655136 A CN 201310655136A CN 104694219 A CN104694219 A CN 104694219A
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Abstract
The invention relates to a production method for high-grade naphthenic transformer oil. The production method comprises the following steps: preparing base oil 1 from naphthenic crude atmospheric and vacuum fraction by using combined process of high pressure hydrotreatment-high pressure hydrodewaxing-high pressure hydrofinishing-distillation; preparing base oil 2 from naphthenic crude or paraffinic crude fraction by using combined process of high pressure hydrotreatment or cracking-high pressure hydroisomerization-high pressure hydrofinishing-distillation; and blending the base oil 1 with the base oil 2 in proportion, adding 0.3 to 0.40% of 2,6-di-t-butyl p-cresol (DBPC) anti-oxidant and carrying out blending. The high-grade naphthenic transformer oil meets requirements on I -30 DEG C transformer oil (special) prescribed in the standards GB2536-2011 and IEC60296-2012; and the produced transformer oil has the gassing property of + 35 mu L/min, an aniline point of no more than 84 DEG C, a CP value in carbon type analysis of less than 50%, good electrical performance and anti-gassing performance, excellent antioxidation performance and good dissolving performance.
Description
Technical field
The present invention relates to a kind of production method of high-level cycloalkyl transformer oil, belong to hydrogenation type lubrication oils.
Background technology
Transformer oil is in the electric installation such as transformer, reactor, and main rising is insulated and cooling effect.For ensureing the safe operation of electric installation long period, transformer oil must possess excellent low-temperature performance, meets the requirement of electric installation cold-starting; Lower kinematic viscosity and viscosity index, be conducive to the cooling of electric installation; Excellent electric property; Meet insulation of electrical installation requirement; Good anti-gassing property energy, absorbs the hydrogen because shelf depreciation produces thus prevents the insulation that bubble-discharge destroys electric installation; Good oxidation stability, slows down the oxidation of oil product as far as possible, reduces the generation of greasy filth, is conducive to long-term, the safe operation of electric installation.Suitable dissolved sludge performance (weighing with aniline point), ensures to dissolve the greasy filth that formed in electric installation long-term operation process and avoids destroying insulating material and impact heat transfer; Lower normal paraffin content, prevents from producing microbial contamination in transformer oil operational process.In the above-mentioned performance of transformer oil, electric property, antioxidant property and anti-gassing property energy, solubility property are conflicting, and namely will ensure good electric property and antioxidant property, transformer oil needs deep refining, and aromaticity content is low, aniline point is high; And anti-gassing property energy and solubility property will be ensured, need the aromatic hydrocarbons retaining certain content in transformer oil.Therefore above performance be to meet, in transformer oil composition, the naphthenic hydrocarbon containing high level, suitable aromaticity content needed.The transformer oil of a high-quality be actually solubility property, anti-gassing property can with the balance of antioxidant property, only have adopt naphthenic base crude be raw material, by suitable complete processing just may produce properties balance high-quality cycloalkyl transformer oil (carbon type analysis analyze in C
pvalue is less than 50%), and paraffinic base transformer oil (carbon type analysis analyze in C
pvalue is greater than 50%) even if when aromaticity content is higher, its aniline point still up to more than 95 DEG C, though have the requirement that good electric property and antioxidant property can not meet solubility property.
Existing cycloalkyl transformer oil production technique mainly contains two kinds, and a kind of is traditional " solvent treatment combination process ", sees accompanying drawing 1; Another kind is " high-pressure hydrogenation combination process ", sees accompanying drawing 2.
Traditional " solvent treatment combination process " adopts naphthenic base crude appropriate fractions to be raw material, adopt pre-refining, reduce the acid number of raw material, then refine through solvent (as furfural, phenol, N-Methyl pyrrolidone etc.), remove the lubricating oil undesirable components such as colloid, polycyclic aromatic hydrocarbons, sulphur, nitrogen compound, namely obtain transformer oil base oil finally by clay finishing except desolventizing, basic nitrogen, then add additive mediation and obtain transformer oil.
Adopt the transformer oil base oil antioxidant property of above explained hereafter poor, metal passivator (also claiming metal passivator) and oxidation inhibitor compound need be added, I-30 DEG C of transformer oil (special) antioxidant property index request in GB2536-2011 standard could be met, current research shows, the negative effect of metal passivator meeting mask erosion sulfide, and then affect the reliability of transformer oil active sulfur detected result, many electric installation manufacturerss do not allow to add in transformer oil, IEC60296-2012 standard has required not allow containing metal passivator, even if consult to add with user, but oxidation stability test also requires to evaluate before interpolation metal passivator.
Modern " high-pressure hydrogenation combination process " is combined by high-pressure hydrogenation process or cracking-high-pressure hydrogenation isomerization-high-pressure hydrogenation post-refining-distil process, for raw material with naphthenic base crude appropriate fractions, adopt high-pressure hydrogenation process or hydrocracking process, remove the sulphur in raw material, nitrogen and aromatic hydrocarbons, then normal paraffin is made to be converted into isoparaffin through hydroisomerisation process, reduce pour point, stability is improved finally by high-pressure hydrogenation post-refining, after fractionation, obtain transformer oil base oil, add additive mediation and obtain transformer oil.
Adopt " high-pressure hydrogenation combination process " transformer oil of producing due to refining depth high, aromaticity content is low, aniline point is high, although after adding oxidation inhibitor, there is good antioxidant property, I-30 DEG C of transformer oil (special) anti-oxidative stability index request in GB2536-2011 and IEC60296-2012 standard can be met, but degassing property is+50 ~ 60 μ L/min, comparatively high 30 ~ 40 μ L/min of conventional solvent process for refining, anti-gassing property can be poor, aniline point is conventional solvent process for refining height 5-8 DEG C comparatively, solubility property is poor, affect the long period safe operation of electric installation.
The production method of the high-level cycloalkyl transformer oil that the present invention relates to, both the defect that transformer oil antioxidant property that tradition " solvent treatment combination process " produces is poor had been solved, also the defect of the transformer oil solubility property difference that " high-pressure hydrogenation combination process " is produced is solved, can the good solubility property of balancing transformer oil and the contradiction of antioxidant property.
Summary of the invention
The object of this invention is to provide a kind of production method of high-level cycloalkyl transformer oil, the transformer oil adopting present method to produce can meet the requirement of I-30 DEG C of transformer oil (special) in GB2536-2011 and IEC60296-2012 standard, has better solubility property and superior oxidation resistance energy.
Production process route of the present invention is shown in accompanying drawing 3.
The production method of described a kind of high-level cycloalkyl transformer oil, is characterized in that: base oil is in harmonious proportion by base oil 1 and base oil 2, and harmonic proportion (quality) is 20-40%:80-60%, controls aniline point not higher than 84 DEG C; Add 2,6 ditertiary butyl p cresol (DBPC) oxidation inhibitor of 0.3-0.40%.
The production method of described a kind of high-level cycloalkyl transformer oil, is characterized in that: base oil 1 production technique is (A) raw material, naphthenic base crude Atmospheric vacuum cut; (B) high-pressure hydrogenation process, removes the compounds such as the polar aromatics in raw material, sulphur, nitrogen, meets the requirement of Hydrodewaxing catalyst to charging; (C) high-pressure hydro pour point depression, removes content of wax compound, reduces pour point; (D) high-pressure hydrogenation post-refining, improves the stability of base oil; (E) distill, by atmospheric and vacuum distillation, make boiling range meet base oil requirement.Base oil 1 Con trolling index: 40 DEG C of kinematic viscosity 7-11mm
2/ s, flash-point (remaining silent) is not less than 135 DEG C, C in carbon type composition
avalue is not less than 5%, C
pvalue is not higher than 50%;
The production method of described a kind of high-level cycloalkyl transformer oil, is characterized in that: base oil 2 production technique is (A) raw material, the deasphalted oil that naphthenic base crude or paraffinic crude Atmospheric vacuum cut or vacuum residuum obtain through solvent deasphalting; (B) high-pressure hydrogenation process or process, removes the sulphur in raw material, nitrogen compound and aromatic hydroxy compound, meets the rigors of subsequent technique to charging; (C) high-pressure hydrogenation isomerization process, makes the normal paraffin in raw material be converted into isoparaffin, reduces the pour point of raw material; (D) high-pressure hydrogenation post-refining process, improves stability; (E) distill, by atmospheric and vacuum distillation, make base oil boiling range meet base oil requirement fractionation, base oil 2 Con trolling index is 40 DEG C of kinematic viscosity 7-11mm
2/ s, flash-point (remaining silent) is not less than 135 DEG C, C in carbon type composition
avalue is not higher than 2%;
The present invention has following characteristics: 2,6 ditertiary butyl p cresol (DBPC) oxidation inhibitor that the base oil that is in harmonious proportion only adds 0.3-0.40% just can produce the I-30 DEG C of transformer oil (special) meeting GB2536-2011 and IEC60296-2012 standard-required.The degassing property of transformer oil produced for being less than+35 μ L/min, aniline point not higher than 84 DEG C, C in carbon type analysis
pvalue is less than 50%, have electric property and anti-gassing property can good, antioxidant property is excellent, has good solubility property simultaneously.
Accompanying drawing explanation
Fig. 1: " solvent treatment combination process " production cycloalkyl transformer oil process flow sheet
Fig. 2: " high-pressure hydrogenation combination process " production cycloalkyl transformer oil process flow sheet
Fig. 3: high-level cycloalkyl transformer oil production technological process
Embodiment
Embodiment 1
With naphthenic base crude Atmospheric vacuum cut for raw material, adopt " high-pressure hydrogenation process-high-pressure hydro pour point depression-high-pressure hydrogenation post-refining-distillation " combination process, the base oil A obtained; With naphthenic base crude To Propane Deasphalting Oil for raw material, adopt " high-pressure hydrocracking-high-pressure hydrogenation isomerization-high-pressure hydrogenation post-refining-distillation " combination process, obtain base oil C; Base oil A and base oil C is in harmonious proportion in 20:80 ratio, and 2,6 ditertiary butyl p cresol (DBPC) the oxidation inhibitor mediation then adding 0.35% obtains high-level transformer oil.
This transformer oil meets I-30 DEG C of transformer oil (special) index request in GB2536-2011 and IEC60296-2012 standard, and degassing property is+34 μ L/min, and aniline point is 83.8 DEG C, C in carbon type analysis
pvalue is less than 50%, has good solubility property.
Embodiment 2
With naphthenic base crude Atmospheric vacuum cut for raw material, adopt " high-pressure hydrogenation process-high-pressure hydro pour point depression-high-pressure hydrogenation post-refining-distillation " combination process, the base oil B obtained; With paraffinic crude reduced pressure distillate for raw material, adopt " high-pressure hydrocracking-high-pressure hydrogenation isomerization-high-pressure hydrogenation post-refining-distillation " combination process, obtain base oil D; Base oil B and base oil D is in harmonious proportion in 50:50 ratio, and 2,6 ditertiary butyl p cresol (DBPC) the oxidation inhibitor mediation then adding 0.35% obtains high-level transformer oil.
This transformer oil meets I-30 DEG C of transformer oil (special) index request in GB2536-2011 and IEC60296-2012 standard, and degassing property is+29 μ L/min, and aniline point is 82.9 DEG C, C in carbon type analysis
pvalue is less than 50%, has good solubility property.
Claims (4)
1. a high-level cycloalkyl transformer oil production method, is characterized in that: first with naphthenic base crude Atmospheric vacuum cut for raw material, adopt " high-pressure hydrogenation process-high-pressure hydro pour point depression-high-pressure hydrogenation post-refining-distillation " combination process obtain base oil 1; With naphthenic base crude or paraffinic crude cut for raw material, " high-pressure hydrogenation process or cracking-high-pressure hydrogenation isomerization-high-pressure hydrogenation post-refining-distillation " combination process is adopted to obtain base oil 2; Two kinds of base oils are in harmonious proportion in proportion, and 2,6 ditertiary butyl p cresol (DBPC) oxidation inhibitor adding 0.3%-0.40% is in harmonious proportion and forms.
2. according to high-level cycloalkyl transformer oil production method according to claim 1, it is characterized in that: base oil 1, its raw material is the Atmospheric vacuum cut of naphthenic base crude, by adjustment high-pressure hydrogenation combination process condition, makes base oil control indexes be: 40 DEG C of viscosity 7-11mm
2/ s, pour point≤-40 DEG C, flash-point>=135 DEG C, C in carbon type composition
avalue>=5%, C
pvalue≤50%.
3. according to high-level cycloalkyl transformer oil production method according to claim 1, it is characterized in that: base oil 2, its raw material is the deasphalted oil that naphthenic base crude or paraffinic crude atmospheric and vacuum distillation cut or vacuum residuum obtain through solvent deasphalting; Base oil control indexes is 40 DEG C of viscosity 7-11mm
2/ s, pour point≤-40 DEG C, flash-point>=135 DEG C, C in carbon type composition
avalue≤2%.
4. according to high-level cycloalkyl transformer oil production method according to claim 1, it is characterized in that: " the transformer oil product of mediation ", two kinds of base oil mediation mass ratioes are 20-40%:80-60%, and its aniline point is not higher than 84 DEG C, degassing property≤+ 35 μ L/min, C in carbon type composition
pvalue≤50%.
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| CN201310655136.1A CN104694219A (en) | 2013-12-06 | 2013-12-06 | Production method for high-grade naphthenic transformer oil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165348A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | Cycloalkyl transformer oil composition |
| CN108165339A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | Cycloalkyl transformer oil composition |
| CN108977224A (en) * | 2018-08-01 | 2018-12-11 | 国家能源投资集团有限责任公司 | Transformer oil base oil and preparation method thereof |
| CN111117737A (en) * | 2019-11-30 | 2020-05-08 | 江苏双江能源科技股份有限公司 | Anti-combustion refrigerator oil with strong oil solubility and preparation method thereof |
| CN113930276A (en) * | 2020-07-14 | 2022-01-14 | 中国石油天然气股份有限公司 | Naphthenic transformer oil composition and application |
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| US5167847A (en) * | 1990-05-21 | 1992-12-01 | Exxon Research And Engineering Company | Process for producing transformer oil from a hydrocracked stock |
| CN101372645A (en) * | 2007-08-23 | 2009-02-25 | 株式会社日本能源 | Electrical insulation oil and preparation thereof |
| CN102239241A (en) * | 2008-10-07 | 2011-11-09 | 吉坤日矿日石能源株式会社 | Lubricant base oil and a process for producing the same, and lubricating oil composition |
| CN102311785A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for hydrogenating naphthenic base distillate to produce lubricating oil basic oil |
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2013
- 2013-12-06 CN CN201310655136.1A patent/CN104694219A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5167847A (en) * | 1990-05-21 | 1992-12-01 | Exxon Research And Engineering Company | Process for producing transformer oil from a hydrocracked stock |
| CN101372645A (en) * | 2007-08-23 | 2009-02-25 | 株式会社日本能源 | Electrical insulation oil and preparation thereof |
| CN102239241A (en) * | 2008-10-07 | 2011-11-09 | 吉坤日矿日石能源株式会社 | Lubricant base oil and a process for producing the same, and lubricating oil composition |
| CN102311785A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for hydrogenating naphthenic base distillate to produce lubricating oil basic oil |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165348A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | Cycloalkyl transformer oil composition |
| CN108165339A (en) * | 2016-12-08 | 2018-06-15 | 中国石油天然气股份有限公司 | Cycloalkyl transformer oil composition |
| CN108977224A (en) * | 2018-08-01 | 2018-12-11 | 国家能源投资集团有限责任公司 | Transformer oil base oil and preparation method thereof |
| CN111117737A (en) * | 2019-11-30 | 2020-05-08 | 江苏双江能源科技股份有限公司 | Anti-combustion refrigerator oil with strong oil solubility and preparation method thereof |
| CN113930276A (en) * | 2020-07-14 | 2022-01-14 | 中国石油天然气股份有限公司 | Naphthenic transformer oil composition and application |
| CN113930276B (en) * | 2020-07-14 | 2023-01-10 | 中国石油天然气股份有限公司 | Naphthenic transformer oil composition and application |
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Application publication date: 20150610 |