CN110283574A - Food-grade conduction oil - Google Patents
Food-grade conduction oil Download PDFInfo
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- CN110283574A CN110283574A CN201910468656.9A CN201910468656A CN110283574A CN 110283574 A CN110283574 A CN 110283574A CN 201910468656 A CN201910468656 A CN 201910468656A CN 110283574 A CN110283574 A CN 110283574A
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- 239000003921 oil Substances 0.000 claims abstract description 109
- 239000000654 additive Substances 0.000 claims abstract description 35
- 230000000996 additive effect Effects 0.000 claims abstract description 35
- 150000001875 compounds Chemical class 0.000 claims abstract description 35
- 239000007866 anti-wear additive Substances 0.000 claims abstract description 30
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 30
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 30
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002199 base oil Substances 0.000 claims abstract description 21
- 238000005536 corrosion prevention Methods 0.000 claims abstract description 21
- 239000013556 antirust agent Substances 0.000 claims description 14
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000002184 metal Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000036541 health Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000021060 food property Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The present invention provides a kind of food-grade conduction oils, it is formed according to weight percent are as follows: hydroisomerizing dewaxing three classes base oil accounts for 95.9-96.1%, high-temperature antioxidant accounts for 1.9-2.1%, extreme pressure anti-wear additives account for 0.4-0.6%, corrosion prevention rust preventer accounts for 0.4-0.6%, matal deactivator accounts for 0.4-0.6%, and ashless recycle oil compound additive accounts for 0.4-0.6%.Due to being added to corrosion prevention rust preventer; make food-grade is hydraulic to have with good anticorrosive property and rust-preventing characteristic, to realize the protection to equipment, and then realizes equipment and can also provide smooth starting after long-time is shut down; to reduce labour cost and material cost, the usage experience of product is improved；By adding ashless recycle oil compound additive, food-grade conduction oil is set to keep effect for a long time, to reduce inventory and raw material deposit overall cost.
Description
Technical field
The present invention relates to conduction oil technical fields, in particular to a kind of food-grade conduction oil.
Background technique
Currently, in the related art, in a device by the addition of existing conduction oil, since existing conduction oil is without good anti-
Corrosivity and rust-preventing characteristic, therefore after equipment is shut down for a long time, equipment will be unable to smooth starting, it is needed at this time by hydraulic by emptying,
Add new conduction oil again again, this has resulted in the raising of labour cost and material cost, reduces the usage experience of product.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the present invention proposes a kind of food-grade conduction oil.
In view of this, being formed according to weight percent are as follows: hydroisomerizing the present invention provides a kind of food-grade conduction oil
Dewaxing three classes base oil accounts for 95.9-96.1%, and high-temperature antioxidant accounts for 1.9-2.1%, and extreme pressure anti-wear additives account for 0.4-0.6%, anti-corrosion
Antirust agent accounts for 0.4-0.6%, and matal deactivator accounts for 0.4-0.6%, and ashless recycle oil compound additive accounts for 0.4-0.6%.
In the technical scheme, by making hydroisomerizing dewaxing three classes base oil account for 95.9-96.1%, make high-temperature antioxidant
1.9-2.1% is accounted for, extreme pressure anti-wear additives is made to account for 0.4-0.6%, corrosion prevention rust preventer is made to account for 0.4-0.6%, accounts for matal deactivator
0.4-0.6% makes ashless recycle oil compound additive account for 0.4-0.6%, and is mixed and to form food-grade conduction oil.It is formed
Food-grade conduction oil has excellent high temperature and thermo oxidative stability energy, greatly prolongs oil product oil change interval, reduces maintenance service
Cost；And the food-grade conduction oil formed also has good water separable performance energy, and effective protection lubricating system is in wet environment
With quick separating when encountering moisture, it is provided simultaneously with low-down ash content and carbon deposit deposition properties, effectively inhibits oxidates raw
At extension service life of equipment.Due to being added to corrosion prevention rust preventer, make food-grade is hydraulic to have with good anticorrosive property and prevent
Rust property to realize the protection to equipment, and then realizes equipment and can also provide smooth starting after long-time is shut down, with drop
Low labour cost and material cost improve the usage experience of product；By adding ashless recycle oil compound additive, make food
Grade conduction oil keeps effect for a long time, to reduce inventory and raw material deposit overall cost.
In addition, the food-grade conduction oil in above-mentioned technical proposal provided by the invention can also have following supplementary technology special
Sign:
In the above-mentioned technical solutions, it is preferable that food-grade conduction oil is formed according to weight percent are as follows: hydroisomerizing dewaxing
Three classes base oil accounts for 96%, and high-temperature antioxidant accounts for 2%, and extreme pressure anti-wear additives account for 0.5%, and corrosion prevention rust preventer accounts for 0.5%, metal passivation
Agent accounts for 0.5%, and ashless recycle oil compound additive accounts for 0.5%.
In the above-mentioned technical solutions, it is preferable that hydroisomerizing dewaxes III class base oil as No. 5 white oils of food-grade.
In the technical scheme, by the way that hydroisomerizing is dewaxed III class base oil as No. 5 white oils of food-grade, lead food-grade
Hot oil has edible characteristic, works as food-grade conduction oil in food processing enterprises in use, even if eating to realize
Grade conduction oil is revealed from the device, and food-grade conduction oil will not have an impact food, and then to improve the safety of food
Property, and ensure the health right and interest of consumer, to improve the applicability of product, expand the scope of application of product.
In the above-mentioned technical solutions, it is preferable that high-temperature antioxidant is food-grade high-temperature antioxidant；Extreme pressure anti-wear additives are food
Grade extreme pressure anti-wear additives；Corrosion prevention rust preventer is food-grade corrosion-resistant antirust agent；Ashless recycle oil compound additive, which is that food-grade is ashless, to follow
Ring oil compound additive.
In the technical scheme, in the technical scheme, by setting food-grade high-temperature antioxidant for high-temperature antioxidant,
Food-grade extreme pressure anti-wear additives are set by extreme pressure anti-wear additives, food-grade corrosion-resistant antirust agent are set by corrosion prevention rust preventer, by metal
Passivator is set as grade metal passivator, and it is compound to set the ashless recycle oil of food-grade for ashless recycle oil compound additive
Additive, further realizing makes food-grade conduction oil have edible characteristic, to realize when food-grade conduction oil is in food
In use, being revealed from the device even if food-grade conduction oil occurs, food-grade conduction oil will not produce food in processing enterprise
It is raw to influence, so to improve the safety of food, and ensure the health right and interest of consumer, to improve the applicability of product, expand
The scope of application of product.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
To better understand the objects, features and advantages of the present invention, below with regard to specific embodiment pair
The present invention is further described in detail.It should be noted that in the absence of conflict, embodiments herein and implementation
Feature in example can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Embodiment 1
The present embodiment 1 provides a kind of food-grade conduction oil, forms according to weight percent are as follows: hydroisomerizing dewaxing three
Class base oil accounts for 95.9%, and high-temperature antioxidant accounts for 2.1%, and extreme pressure anti-wear additives account for 0.4%, and corrosion prevention rust preventer accounts for 0.4%, metallic blunt
Agent accounts for 0.6%, and ashless recycle oil compound additive accounts for 0.6%.
In the technical scheme, by making hydroisomerizing dewaxing three classes base oil account for 95.9%, account for high-temperature antioxidant
2.1%, so that extreme pressure anti-wear additives is accounted for 0.4%, corrosion prevention rust preventer is made to account for 0.4%, matal deactivator is made to account for 0.6%, makes ashless circulation
Oily compound additive accounts for 0.6%, and is mixed and to form food-grade conduction oil.The food-grade conduction oil of formation has excellent height
Mild thermo oxidative stability energy, greatly prolongs oil product oil change interval, reduces maintenance service cost；And the food-grade formed is thermally conductive
Oil also has good water separable performance energy, and effective protection lubricating system is in wet environment and quick separating when encountering moisture, simultaneously
Have low-down ash content and carbon deposit deposition properties, effectively oxidates is inhibited to generate, extends service life of equipment.Due to adding
Corrosion prevention rust preventer is added, has made food-grade is hydraulic to have with good anticorrosive property and rust-preventing characteristic, to realize the guarantor to equipment
It protects, and then realize equipment can also provide smooth starting after long-time is shut down, to reduce labour cost and material cost, is promoted
The usage experience of product；By the ashless recycle oil compound additive of addition, food-grade conduction oil is made to keep effect for a long time, thus
Reduce inventory and raw material deposit overall cost.
Preferably, hydroisomerizing dewaxes III class base oil as No. 5 white oils of food-grade.
As an example, the manufacturer of No. 5 white oils of food-grade can are as follows: PetroChina Company Ltd., but the present invention
It is without being limited thereto.
Preferably, high-temperature antioxidant is food-grade high-temperature antioxidant；Extreme pressure anti-wear additives are food-grade extreme pressure anti-wear additives；Anti-corrosion
Antirust agent is food-grade corrosion-resistant antirust agent；Ashless recycle oil compound additive is the ashless recycle oil compound additive of food-grade.
In this embodiment, by the way that hydroisomerizing is dewaxed III class base oil for No. 5 white oils of food-grade, by high-temperature antioxidant
It is set as food-grade high-temperature antioxidant, food-grade extreme pressure anti-wear additives is set by extreme pressure anti-wear additives, sets corrosion prevention rust preventer to
Matal deactivator is set grade metal passivator by food-grade corrosion-resistant antirust agent, and ashless recycle oil compound additive is set
It is set to the ashless recycle oil compound additive of food-grade, makes food-grade conduction oil that there is edible characteristic to realize, to realize
When food-grade conduction oil in food processing enterprises in use, even if occur food-grade conduction oil reveal from the device, food-grade
Conduction oil will not have an impact food, and then to improve the safety of food, and ensure the health right and interest of consumer, to mention
The applicability of high product expands the scope of application of product.
Embodiment 2
The present embodiment 2 provides a kind of food-grade conduction oil, forms according to weight percent are as follows: hydroisomerizing dewaxing three
Class base oil accounts for 96.1%, and high-temperature antioxidant accounts for 1.9%, and extreme pressure anti-wear additives account for 0.6%, and corrosion prevention rust preventer accounts for 0.6%, metallic blunt
Agent accounts for 0.4%, and ashless recycle oil compound additive accounts for 0.4%.
In the technical scheme, by making hydroisomerizing dewaxing three classes base oil account for 96.1%, account for high-temperature antioxidant
1.9%, so that extreme pressure anti-wear additives is accounted for 0.6%, corrosion prevention rust preventer is made to account for 0.6%, matal deactivator is made to account for 0.4%, makes ashless circulation
Oily compound additive accounts for 0.4%, and is mixed and to form food-grade conduction oil.The food-grade conduction oil of formation has excellent height
Mild thermo oxidative stability energy, greatly prolongs oil product oil change interval, reduces maintenance service cost；And the food-grade formed is thermally conductive
Oil also has good water separable performance energy, and effective protection lubricating system is in wet environment and quick separating when encountering moisture, simultaneously
Have low-down ash content and carbon deposit deposition properties, effectively oxidates is inhibited to generate, extends service life of equipment.Due to adding
Corrosion prevention rust preventer is added, has made food-grade is hydraulic to have with good anticorrosive property and rust-preventing characteristic, to realize the guarantor to equipment
It protects, and then realize equipment can also provide smooth starting after long-time is shut down, to reduce labour cost and material cost, is promoted
The usage experience of product；By the ashless recycle oil compound additive of addition, food-grade conduction oil is made to keep effect for a long time, thus
Reduce inventory and raw material deposit overall cost.
Preferably, hydroisomerizing dewaxes III class base oil as No. 5 white oils of food-grade.
As an example, the manufacturer of No. 5 white oils of food-grade can are as follows: PetroChina Company Ltd., but the present invention
It is without being limited thereto.
Preferably, high-temperature antioxidant is food-grade high-temperature antioxidant；Extreme pressure anti-wear additives are food-grade extreme pressure anti-wear additives；Anti-corrosion
Antirust agent is food-grade corrosion-resistant antirust agent；Ashless recycle oil compound additive is the ashless recycle oil compound additive of food-grade.
In this embodiment, by the way that hydroisomerizing is dewaxed III class base oil for No. 5 white oils of food-grade, by high-temperature antioxidant
It is set as food-grade high-temperature antioxidant, food-grade extreme pressure anti-wear additives is set by extreme pressure anti-wear additives, sets corrosion prevention rust preventer to
Matal deactivator is set grade metal passivator by food-grade corrosion-resistant antirust agent, and ashless recycle oil compound additive is set
It is set to the ashless recycle oil compound additive of food-grade, makes food-grade conduction oil that there is edible characteristic to realize, to realize
When food-grade conduction oil in food processing enterprises in use, even if occur food-grade conduction oil reveal from the device, food-grade
Conduction oil will not have an impact food, and then to improve the safety of food, and ensure the health right and interest of consumer, to mention
The applicability of high product expands the scope of application of product.
The present embodiment 3 provides a kind of food-grade conduction oil, forms according to weight percent are as follows: hydroisomerizing dewaxing three
Class base oil accounts for 96%, and high-temperature antioxidant accounts for 2%, and extreme pressure anti-wear additives account for 0.5%, and corrosion prevention rust preventer accounts for 0.5%, matal deactivator
0.5% is accounted for, ashless recycle oil compound additive accounts for 0.5%.
In the technical scheme, by make hydroisomerizing dewax three classes base oil account for 96%, so that high-temperature antioxidant is accounted for 2%,
So that extreme pressure anti-wear additives is accounted for 0.5%, corrosion prevention rust preventer is made to account for 0.5%, matal deactivator is made to account for 0.5%, keeps ashless recycle oil compound
Additive accounts for 0.5%, and is mixed and to form food-grade conduction oil.The food-grade conduction oil of formation has excellent high temperature and heat
Oxidation-stabilized performance greatly prolongs oil product oil change interval, reduces maintenance service cost；And the food-grade conduction oil formed also has
There is good water separable performance energy, effective protection lubricating system is provided simultaneously with non-in wet environment and quick separating when encountering moisture
Often low ash content and carbon deposit deposition properties effectively inhibits oxidates to generate, and extends service life of equipment.It is anti-due to being added to
Rotten antirust agent makes food-grade is hydraulic to have with good anticorrosive property and rust-preventing characteristic, to realize the protection to equipment, in turn
Smooth starting can also be provided after long-time is shut down by realizing equipment, to reduce labour cost and material cost, improve product
Usage experience；By adding ashless recycle oil compound additive, food-grade conduction oil is set to keep effect for a long time, to reduce
Inventory and raw material lay in overall cost.
Preferably, hydroisomerizing dewaxes III class base oil as No. 5 white oils of food-grade.
As an example, the manufacturer of No. 5 white oils of food-grade can are as follows: PetroChina Company Ltd., but the present invention
It is without being limited thereto.
Preferably, high-temperature antioxidant is food-grade high-temperature antioxidant；Extreme pressure anti-wear additives are food-grade extreme pressure anti-wear additives；Anti-corrosion
Antirust agent is food-grade corrosion-resistant antirust agent；Ashless recycle oil compound additive is the ashless recycle oil compound additive of food-grade.
In this embodiment, by the way that hydroisomerizing is dewaxed III class base oil for No. 5 white oils of food-grade, by high-temperature antioxidant
It is set as food-grade high-temperature antioxidant, food-grade extreme pressure anti-wear additives is set by extreme pressure anti-wear additives, sets corrosion prevention rust preventer to
Matal deactivator is set grade metal passivator by food-grade corrosion-resistant antirust agent, and ashless recycle oil compound additive is set
It is set to the ashless recycle oil compound additive of food-grade, makes food-grade conduction oil that there is edible characteristic to realize, to realize
When food-grade conduction oil in food processing enterprises in use, even if occur food-grade conduction oil reveal from the device, food-grade
Conduction oil will not have an impact food, and then to improve the safety of food, and ensure the health right and interest of consumer, to mention
The applicability of high product expands the scope of application of product.
In the description of the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly, term
The orientation or positional relationship of the instructions such as "upper", "lower", is merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention；Term " connection ", " installation ", " fixation " etc. shall be understood in a broad sense, for example, " connection " can be fixation
Connection, may be a detachable connection, or be integrally connected；It can be directly connected, the indirect phase of intermediary can also be passed through
Even.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Meaning.
In the description of the present invention, the description meaning of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Refer to that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present invention, schematic expression of the above terms are not necessarily referring to identical embodiment or example.And
And the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable
Mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of food-grade conduction oil, which is characterized in that it is formed according to weight percent are as follows:
Hydroisomerizing dewaxing three classes base oil accounts for 95.9-96.1%, and high-temperature antioxidant accounts for 1.9-2.1%, and extreme pressure anti-wear additives account for
0.4-0.6%, corrosion prevention rust preventer account for 0.4-0.6%, and matal deactivator accounts for 0.4-0.6%, and ashless recycle oil compound additive accounts for
0.4-0.6%.
2. food-grade conduction oil according to claim 1, which is characterized in that the food-grade conduction oil is according to weight percent
Than composition are as follows:
The hydroisomerizing dewaxing three classes base oil accounts for 96%, and the high-temperature antioxidant accounts for 2%, and the extreme pressure anti-wear additives account for
0.5%, the corrosion prevention rust preventer accounts for 0.5%, and the matal deactivator accounts for 0.5%, and the ashless recycle oil compound additive accounts for
0.5%.
3. food-grade conduction oil according to claim 2, it is characterised in that:
The hydroisomerizing dewaxes III class base oil as No. 5 white oils of food-grade.
4. food-grade conduction oil according to claim 3, it is characterised in that:
The high-temperature antioxidant is food-grade high-temperature antioxidant；
The extreme pressure anti-wear additives are food-grade extreme pressure anti-wear additives；
The corrosion prevention rust preventer is food-grade corrosion-resistant antirust agent；
The ashless recycle oil compound additive is the ashless recycle oil compound additive of food-grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468656.9A CN110283574A (en) | 2019-05-31 | 2019-05-31 | Food-grade conduction oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468656.9A CN110283574A (en) | 2019-05-31 | 2019-05-31 | Food-grade conduction oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110283574A true CN110283574A (en) | 2019-09-27 |
Family
ID=68003072
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| CN201910468656.9A Pending CN110283574A (en) | 2019-05-31 | 2019-05-31 | Food-grade conduction oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154194A (en) * | 2015-10-21 | 2015-12-16 | 中国石油化工股份有限公司 | Food-grade lubricating oil composition |
| CN105567385A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Food-grade high temperature chain oil composition mainly containing synthetic ester and preparation method thereof |
| CN106947574A (en) * | 2017-03-31 | 2017-07-14 | 烟台德高石油有限公司 | Composition for food-grade hydraulic oil and preparation method thereof and hydraulic oil comprising said composition and preparation method thereof |
| CN106947575A (en) * | 2017-03-31 | 2017-07-14 | 烟台德高石油有限公司 | Composition for food-grade gear oil and preparation method thereof and gear oil comprising said composition and preparation method thereof |
| CN109666529A (en) * | 2017-10-13 | 2019-04-23 | 中国石油化工股份有限公司 | A kind of food-grade pumping fluid composition based on synthetic oil |
-
2019
- 2019-05-31 CN CN201910468656.9A patent/CN110283574A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567385A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Food-grade high temperature chain oil composition mainly containing synthetic ester and preparation method thereof |
| CN105154194A (en) * | 2015-10-21 | 2015-12-16 | 中国石油化工股份有限公司 | Food-grade lubricating oil composition |
| CN106947574A (en) * | 2017-03-31 | 2017-07-14 | 烟台德高石油有限公司 | Composition for food-grade hydraulic oil and preparation method thereof and hydraulic oil comprising said composition and preparation method thereof |
| CN106947575A (en) * | 2017-03-31 | 2017-07-14 | 烟台德高石油有限公司 | Composition for food-grade gear oil and preparation method thereof and gear oil comprising said composition and preparation method thereof |
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| Title |
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| 张照明口述；张文庆整理, 光明日报出版社 * |
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Application publication date: 20190927 |
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