CN106520351A - Environment-friendly and energy-saving engine lubricant with good pour point depressing effect and preparation method thereof - Google Patents
Environment-friendly and energy-saving engine lubricant with good pour point depressing effect and preparation method thereof Download PDFInfo
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- CN106520351A CN106520351A CN201610868836.2A CN201610868836A CN106520351A CN 106520351 A CN106520351 A CN 106520351A CN 201610868836 A CN201610868836 A CN 201610868836A CN 106520351 A CN106520351 A CN 106520351A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/05—Metals; Alloys
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/401—Fatty vegetable or animal oils used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
- C10M2215/224—Imidazoles
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/64—Environmental friendly compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention discloses an environment-friendly and energy-saving engine lubricant with a good pour point depressing effect and a preparation method thereof. The environment-friendly and energy-saving engine lubricant is characterized by being prepared by the following raw materials, by weight, of 1-2 parts of fumarate, 50-70 parts of rapeseed oil, 1-2 parts of vinyl acetate, 15-25 parts of polymerized alpha olefin PAO6, 5-15 parts of polyol esters PriEco3000, 1-2 parts of vinyl imidazole, 4-8 parts of sulfur powder, 0.5-1 part of tungsten powder, 5-10 parts of zeolite ZIF-8, 2-3 parts of linoleic acid, 15-20 parts of dimethyl sulfoxide, 4-7 parts of ethylene-propylene copolymers T618, 15-20 parts of deionized water and an appropriate amount of absolute ethyl alcohol. According to the preparation method, the hydrophobic-oleophylic material zeolite ZIF-8 is introduced and can serve as a carrier of tungsten disulfide particles to further improve the fusion property of the tungsten disulfide particles and base oil; and by means of compounding of the raw materials, the prepared lubricant is good in dispersity and excellent in stability.
Description
Technical field
A kind of a kind of the present invention relates to engine lubricating oil and its preparation, more particularly to the environmental protection and energy saving that depression effeCt is good
Motivation lubricating oil and preparation method thereof.
Background technology
Lubricating oil also has pole in industries such as aviation, automobile, machining, transportation, metallurgy, coal, building, light industrys
For being widely applied.With the high speed development of industry, the demand of lubricating oil is risen year by year.And it is traditional based on mineral oil
The lubricant of oil, not only pollutes environment, while also exacerbating lack of energy.While which is widely used, unavoidably
Ground can by transport, reveal, sputtering, overflow or it is inappropriate discharge etc. number of ways flow into environment, severe contamination soil and
Water resource, destruction ecological environment and ecological balance.Green Lubricants are also called environmentally friendly or environmental compatible type lubricating oil, its
Including both sides implication:One is that its performance must is fulfilled for working condition requirement;Two is ecological effect, i.e., itself and its decompose
Product will not work the mischief to ecological environment, or be friendly to environment to a certain extent in certain limit.
Shi Chen is in its Ph.D. Dissertation《Nanometer WS2The development and its performance study of environmental protection energy-saving engine lubricating oil》
In, using Oleum Brassicae campestriss, polyalphaolefin PAO6, polyol ester PriEco3000 and WS2A kind of engine lubricating oil is prepared for, but
Its bearing capacity, abrasion-resistance need to be improved.
The content of the invention
Thinking based on more than, the present invention is intended to provide a kind of environmental protection and energy saving with high-mechanic performance, high-wear resistance
Engine lubricating oil and preparation method thereof.
The technical problem to be solved is realized using following technical scheme:
The good environmental protection energy-saving engine lubricating oil of a kind of depression effeCt, it is characterised in that be made up of the raw material of following weight portion:
Fumarate 1-2, Oleum Brassicae campestriss 50-70, vinylacetate 1-2, polyalphaolefin PAO6 15-25, polyol ester
PriEco3000 5-15, vinyl imidazole 1-2, sulphur powder 4-8, tungsten powder 0.5-1, zeolite ZIF-8 5-10, linoleic acid 2-3, diformazan
Base sulfoxide 15-20, ethylene-propylene copolymer T618 4-7, deionized water 15-20, appropriate dehydrated alcohol.
Good environmental protection energy-saving engine lubricating oil of described a kind of depression effeCt and preparation method thereof, it is characterised in that by
Following steps are made:
A. sulphur powder and tungsten powder are mixed, forms mixture, the mixture is reacted at a temperature of 110-260 DEG C, then
Reactant is crystallized at a temperature of 500-700 DEG C in nonoxidizing atmosphere, that is, is obtained tungsten disulphide powder and remaining
Sulphur powder mixture;
B. mixture obtained by step a is mixed with deionized water, adds linoleic acid, obtain suspension, adopt in strong ultrasonic field
Ball grinding stirring processes feeding after suspension 8-12h, and lyophilization obtains ultra-fine tungsten disulfide and sulfur mix powder;
C. mix powder obtained by step b is scattered in dimethyl sulfoxide solvent, and is added thereto to zeolite ZIF-8, stirred
Proceed in ptfe autoclave after uniform, after placing 5-10 days under the conditions of 80-120 DEG C, filter and washed with dehydrated alcohol
Wash 2-4 time, after drying at room temperature, obtain adsorbing ultra-fine tungsten disulfide and sulfur powder, and have the zeolite ZIF-8 of dimethyl sulfoxide filling
Mixture;
D. by Oleum Brassicae campestriss, polyalphaolefin PAO6, polyol ester PriEco3004 mixing, fumarate, vinylacetate, second are added
Thiazolinyl imidazoles, at 50-150 DEG C reacts 6-10h, obtains product;
E. by step d products therefrom, ethylene-propylene copolymer T618, mixture mixing obtained by step c, in proceeding to blender, stir 30-
90min.
Good environmental protection energy-saving engine lubricating oil of described a kind of depression effeCt and preparation method thereof, it is characterised in that stir
The rotating speed for mixing machine is 200-400r/min.
The invention has the beneficial effects as follows:The present invention hangs tungsten disulfide using strong ultrasound and the compound action of ball grinding stirring
Floating particles granularity is close to nano tungsten disulfide grain graininess, then carries out moditied processing by linoleic acid to particle surface, effectively anti-
Stopped it is intergranular reunite again so that tungsten disulfide granule keeps stable dispersion in base oil, improve its stability;
Hydrophobic lipophilic material zeolite ZIF-8 is introduced, and is soaked with dimethyl sulfoxide, not only can be using zeolite ZIF-8 as tungsten disulfide
The carrier of granule, further improves its amalgamation with base oil, at the same zeolite ZIF-8 can as excellent lubricating additive,
With tungsten disulfide together to strengthen the bearing capacity and antiwear and antifriction ability of lubricating oil, and dimethyl sulfoxide then promotes zeolite
The fusion faculty of ZIF-8 carriers and lubricating oil.It is used as subjective basis oil by Oleum Brassicae campestriss, improves the feature of environmental protection of the lubricating oil
Can, environmental friendliness;By the compounding of raw material, obtained lubricating oil favorable dispersibility, excellent in stability is made.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.
Embodiment
The good environmental protection energy-saving engine lubricating oil of a kind of depression effeCt, it is characterised in that by the raw material system of following weight portion
Into:
Fumarate 2, Oleum Brassicae campestriss 70, vinylacetate 2, polyalphaolefin PAO6 25, polyol ester PriEco3000 15, ethylene
Base imidazoles 2, sulphur powder 8, tungsten powder 1, zeolite ZIF-8 10, linoleic acid 3, dimethyl sulfoxide 20, ethylene-propylene copolymer T618 7, deionization
Water 20, appropriate dehydrated alcohol.
Good environmental protection energy-saving engine lubricating oil of described a kind of depression effeCt and preparation method thereof, it is characterised in that by
Following steps are made:
A. sulphur powder and tungsten powder are mixed, forms mixture, the mixture is reacted at a temperature of 110-260 DEG C, then
Reactant is crystallized at a temperature of 500-700 DEG C in nonoxidizing atmosphere, that is, is obtained tungsten disulphide powder and remaining
Sulphur powder mixture;
B. mixture obtained by step a is mixed with deionized water, adds linoleic acid, obtain suspension, adopt in strong ultrasonic field
Ball grinding stirring processes feeding after suspension 8-12h, and lyophilization obtains ultra-fine tungsten disulfide and sulfur mix powder;
C. mix powder obtained by step b is scattered in dimethyl sulfoxide solvent, and is added thereto to zeolite ZIF-8, stirred
Proceed in ptfe autoclave after uniform, after placing 5-10 days under the conditions of 80-120 DEG C, filter and washed with dehydrated alcohol
Wash 2-4 time, after drying at room temperature, obtain adsorbing ultra-fine tungsten disulfide and sulfur powder, and have the zeolite ZIF-8 of dimethyl sulfoxide filling
Mixture;
D. by Oleum Brassicae campestriss, polyalphaolefin PAO6, polyol ester PriEco3004 mixing, fumarate, vinylacetate, second are added
Thiazolinyl imidazoles, at 50-150 DEG C reacts 6-10h, obtains product;
E. by step d products therefrom, ethylene-propylene copolymer T618, mixture mixing obtained by step c, in proceeding to blender, stir 30-
90min.
Good environmental protection energy-saving engine lubricating oil of described a kind of depression effeCt and preparation method thereof, it is characterised in that stir
The rotating speed for mixing machine is 200-400r/min.
The present invention technical parameter be:Average friction coefficient >=0.62;The addition of tungsten disulphide powder makes engine piston
The wear extent of ring reduces >=27.6%.
Claims (3)
1. the good environmental protection energy-saving engine lubricating oil of a kind of depression effeCt, it is characterised in that be made up of the raw material of following weight portion:
Fumarate 1-2, Oleum Brassicae campestriss 50-70, vinylacetate 1-2, polyalphaolefin PAO6 15-25, polyol ester
PriEco3000 5-15, vinyl imidazole 1-2, sulphur powder 4-8, tungsten powder 0.5-1, zeolite ZIF-8 5-10, linoleic acid 2-3, diformazan
Base sulfoxide 15-20, ethylene-propylene copolymer T618 4-7, deionized water 15-20, appropriate dehydrated alcohol.
2. good environmental protection energy-saving engine lubricating oil of a kind of depression effeCt according to claim 1 and preparation method thereof, its
It is characterised by, is made up of following steps:
A. sulphur powder and tungsten powder are mixed, forms mixture, the mixture is reacted at a temperature of 110-260 DEG C, then
Reactant is crystallized at a temperature of 500-700 DEG C in nonoxidizing atmosphere, that is, is obtained tungsten disulphide powder and remaining
Sulphur powder mixture;
B. mixture obtained by step a is mixed with deionized water, adds linoleic acid, obtain suspension, adopt in strong ultrasonic field
Ball grinding stirring processes feeding after suspension 8-12h, and lyophilization obtains ultra-fine tungsten disulfide and sulfur mix powder;
C. mix powder obtained by step b is scattered in dimethyl sulfoxide solvent, and is added thereto to zeolite ZIF-8, stirred
Proceed in ptfe autoclave after uniform, after placing 5-10 days under the conditions of 80-120 DEG C, filter and washed with dehydrated alcohol
Wash 2-4 time, after drying at room temperature, obtain adsorbing ultra-fine tungsten disulfide and sulfur powder, and have the zeolite ZIF-8 of dimethyl sulfoxide filling
Mixture;
D. by Oleum Brassicae campestriss, polyalphaolefin PAO6, polyol ester PriEco3004 mixing, fumarate, vinylacetate, second are added
Thiazolinyl imidazoles, at 50-150 DEG C reacts 6-10h, obtains product;
E. by step d products therefrom, ethylene-propylene copolymer T618, mixture mixing obtained by step c, in proceeding to blender, stir 30-
90min.
3. good environmental protection energy-saving engine lubricating oil of a kind of depression effeCt according to claim 2 and preparation method thereof, its
It is characterised by, the rotating speed of blender is 200-400r/min.
Priority Applications (1)
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CN201610868836.2A CN106520351A (en) | 2016-09-30 | 2016-09-30 | Environment-friendly and energy-saving engine lubricant with good pour point depressing effect and preparation method thereof |
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CN201610868836.2A CN106520351A (en) | 2016-09-30 | 2016-09-30 | Environment-friendly and energy-saving engine lubricant with good pour point depressing effect and preparation method thereof |
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CN201610868836.2A Withdrawn CN106520351A (en) | 2016-09-30 | 2016-09-30 | Environment-friendly and energy-saving engine lubricant with good pour point depressing effect and preparation method thereof |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105038905A (en) * | 2015-07-09 | 2015-11-11 | 太原理工大学 | Lubricating oil, lubricating oil additive and preparation method therefor |
-
2016
- 2016-09-30 CN CN201610868836.2A patent/CN106520351A/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105038905A (en) * | 2015-07-09 | 2015-11-11 | 太原理工大学 | Lubricating oil, lubricating oil additive and preparation method therefor |
Non-Patent Citations (4)
Title |
---|
(苏)彼特罗夫: "《发动机燃料化学》", 30 September 1957, 石油工业出版社 * |
朱廷彬 等: "《润滑脂技术大全》", 30 April 2005, 中国石化出版社 * |
杨兰春: "《齿轮工程词典》", 30 November 1994, 机械工业出版社 * |
石琛: "纳米WS2环保节能发动机润滑油的研制及其性能研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
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