CN86100480A - The lubricant additive that is used with Aalcohols fuel - Google Patents
The lubricant additive that is used with Aalcohols fuel Download PDFInfo
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- CN86100480A CN86100480A CN 86100480 CN86100480A CN86100480A CN 86100480 A CN86100480 A CN 86100480A CN 86100480 CN86100480 CN 86100480 CN 86100480 A CN86100480 A CN 86100480A CN 86100480 A CN86100480 A CN 86100480A
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Abstract
The invention provides a kind of lubricant additive that is used with Aalcohols fuel, the major part of its composition is polyalkylene glycol (being made of the alkene that contains 2～3 carbon atoms), sub-fraction is a kind of aliphatic amide, a kind of ring grease amine or the mixture of the two, and another small portion is a phosphoric acid ester.Its amine component can comprise a kind of one-level arylamine, a kind of secondary aromatic amine or the mixture of the two.Best composition is: the described polyalkylene glycol of about 94～98.5% (weight), about described amine of 1.0～4.0% (weight) and the described phosphoric acid ester of about 0.5～2.0% (weight).
Description
Content of the present invention is a kind of additive of automobile conventional lubricants, can make lubricant be applicable to that with alcohols (for example methyl alcohol or ethanol) be the oil engine of fuel with it.
Normally used automotive lubricant, effect is bad in the engine that with the alcohols is fuel, the surface be engine scuffing excessively and the growth gradually of lubricant spending rate.One of its reason is that the chemical reactivity of the fuel Products of gasoline and two kinds of automobile fuel systems of alcohols is very different.In the Aalcohols fuel system, some lubricant degradation reactions can take place, and DeR can not occur in the Fuel Petroleum system.These chemical reactions cause the corrosive increase of Aalcohols fuel.For example, methyl alcohol is easy to oxidation and forms formaldehyde and formic acid.This reacts as the formula (1):
Great majority use the vehicles of methanol fuels, all since cylinder corrosion of over-drastic top and bearing wear that the formic acid of methyl alcohol burning generation causes suffer a loss.The organic amine additive that is used as antioxidant, corrosion inhibitor and antiwear agents in formic acid and the common automotive lubricant reacts.The amine additive can in and formic acid.But, common additive as if can not be fully in and the amount of formic acid that generated of methyl alcohol burning.These reactions are suc as formula shown in (2) and the formula (3):
The ability of formaldehyde and phenols and glycols additive reaction is high.Formaldehyde with react as the phenols of antioxidant with as the hydroxyl polymer-containing of ashless dispersant.These are reflected under the acidic conditions and take place, and along with the organic amine depletion of additive in the reaction of formic acid in and strengthen.These formaldehyde reactions have played tangible effect for the degraded of lubricating oil in the methanol fuel system as shown in formula (4):
Therefore need a kind of like this lubricant additive, it can generate methyl alcohol the oxidizing reaction of formaldehyde and formic acid and over-drastic formaldehyde reaction and formic acid reaction and be reduced to a minimum, and purpose is to prolong those because the life-span of the lubricant additives that consume rapidly with formaldehyde and formic acid reaction.Similarly, the overreaction that also needs a kind of lubricant additive ethanol can be generated the oxidizing reaction of acetaldehyde and acetate and these components is reduced to a minimum.
Another important problem of Aalcohols fuel system is: be used in the main multifunction additive zinc dialkyl dithiophosphate in the most frequently used lubricating oil, play transesterification reaction rapidly, thereby lose its abrasion resistance greatly.These transesterification reactions comprise the alkyl of alcohols (for example methyl alcohol or ethanol) and a kind of original ester (for example zinc dialkyl dithiophosphate) exchange and generate a kind of reaction of new ester.Transesterification reaction is as the formula (5):
（5）
Transesterification reaction is an acid catalyzed reaction, and therefore, aldehydes that is generated in amido additive in lubricant and the combustion processes and acids react and just take place after consuming.Transesterification reaction is not the dominant mechanism that lubricating oil is degraded in the hydrocarbon fuels system, but the preliminary mechanism that lubricating oil is degraded in methyl alcohol and other Aalcohols fuel system.For example, when methyl alcohol and ethanol mixed with gasoline, the pure content in the importance of its transesterification reaction and the mixture was proportional.
Be that another reason that corrosion increases in the engine of fuel is that the solubleness of carbonic acid gas in alcohols increases with the alcohols.For example, the solubleness of carbonic acid gas in methyl alcohol is than big in water.Water and methyl alcohol come across as products of combustion usually crankcase than cold spots.Moisture content and fuel combustion product such as SO
3, NO
2And CO
2Reaction generates corresponding acids: sulfuric acid, nitric acid and carbonic acid, shown in (6), (7) and (8):
These can with the acids of metal reaction in the engine, be corrosive one of the main reasons in the oil engine.The alkaline additive of lubricant commonly used in the hydrocarbon fuels system, as organic amine and alkali metal compound, above-mentioned acid effectively can neutralize.But, because CO
2The cause that solubleness in alcohols is bigger, the content of carbonic acid is than much higher in the Fuel Petroleum system in methyl alcohol or other Aalcohols fuel system.Equally, NO
2The nitric acid that consumes and generate also is like this.The absorption of carbonic acid gas obviously is the major reason that Aalcohols fuel has inconceivable highly corrosive.
The analysis revealed of lubricating oil: the corrosion inhibitor of forming by sulfonate, naphthenate or other alkaline metal salt since with carbonic acid (generating when the insoluble alkaline carbonate precipitation) reaction mass consumption.This precipitin reaction is suc as formula shown in (9) and the formula (10):
This precipitin reaction and carbonic acid are competed by organic amine neutral reacting phase.Though neutralization reaction is very fast and more easily generation, the reaction of alkaline metal salt aggravates along with the consumption of organic amine.So, need a kind of like this lubricant additive, it can make the organic amine additive be used for and formic acid or acetate and make the consumption rate of carbonic acid slower, thereby has reduced an alkali metal salt owing to carrying out the possibility that precipitin reaction that formula (9) and formula (10) illustrate consumes.
Catalogue of the present invention, providing a kind of being used for the alcohols is the lubricant additive of the oil engine of fuel, this additive can protect and stop for corrosive nature that is caused by alcohols and engine scuffing effect.
Another object of the present invention provides and a kind ofly has in the enhanced and the lubricant additive of acids ability.
Further purpose of the present invention provides the lubricant additive that a kind of antiwear agents of not degraded by methyl alcohol or ethanol is formed.
The invention provides a kind of lubricant additive, it is added to formed lubricant in the common automotive lubricant, be applicable to that with methyl alcohol or ethanol be the engine of fuel, main part during this additive is formed is the polyalkylene glycol that a kind of alkene that contains 2～3 carbon atoms constitutes, and sub-fraction is a kind of aliphatic amide, ring grease amine or the mixture of the two; Another small portion is a phosphoric acid ester.Lubricant additive of the present invention preferably contains 94～98.5%(weight of having an appointment) polyalkylene glycol (alkene by 2～3 carbon constitutes); About 1.0～4.0%(weight) aliphatic amide, ring grease amine or the mixture of the two; About 0.5～2.0%(weight) phosphoric acid ester.Amine composition in the lubricant additive of the present invention also can comprise a kind of one-level arylamine, secondary aromatic amine or the mixture of the two.
Polyalkylene glycol comprises preferably: polypropylene glycol, poly-Isopropanediol and polyoxyethylene glycol.Better polyalkylene glycol is the polypropylene glycol (hereinafter all using polypropylene glycol 2000) that molecular weight is about 2000 gram/moles.
Amine component in the lubricant additive of the present invention can be the mixture of a kind of aliphatic amide, ring grease amine or a kind of aliphatic amide and a kind of ring grease amine.Preferably: the amine composition is a kind of aliphatic amide; A kind of ring grease amine; The mixture of a kind of aliphatic amide and a kind of ring grease amine; Or a kind of aliphatic amide or ring grease amine (or the two together) are with the mixture of a kind of one-level or secondary aromatic amine (or the two).Adopt a kind of aliphatic amide better separately as the amine composition.
Preferably with aliphatic amide or ring grease amine mutually blended one-level arylamine comprise: adjacent, and Ursol D, adjacent, and para-totuidine, aniline, xylidine, naphthylamines, benzylamine, tolylene diamine and naphthylene diamine.Better the one-level arylamine is an O-Phenylene Diamine.Preferably with aliphatic amide or ring grease amine mutually the blended secondary aromatic amine comprise: N-phenyl-2-naphthylamines, phenyl-a-naphthylamine, Phenyl beta naphthylamine, tolyl naphthylamines, pentanoic, diformazan for pentanoic, phenyltolyl amine, 4,4 '-diamino-diphenylamine and methylphenylamine.Better secondary aromatic amine is N-phenyl-2-naphthylamines.
Used aliphatic amide preferably in the lubricant additive of the present invention is the aliphatic amide with 10～30 carbon atoms.Better aliphatic amide has 12～30 carbon atoms.Best aliphatic amide is an octadecylamine.Ring grease amine comprises hexahydroaniline and methyl cyclohexylamine preferably.
Phosphoric acid fat comprises preferably: tricresyl phosphate (adjacent toluene) ester, tricresyl phosphate (toluene) ester, tricresyl phosphate (to toluene) ester, DBPP, tributyl phosphate, tri-2-ethylhexyl phosphate, trioctyl phosphate, ortho-phosphoric acid diphenyl ester, ortho-phosphoric acid two (toluene) ester, ortho-phosphoric acid three (dodecyl) ester and ortho-phosphoric acid three (octadecyl) ester.Better phosphoric acid ester is ortho-phosphoric acid three (toluene) ester.
Better composition of the present invention comprises: about 94～98.5%(weight) polypropylene glycol 2000, about 1.0～4.0%(weight) octadecylamine and about 0.5～2.0%(weight) tricresyl phosphate (adjacent toluene) ester.
Above-mentioned all compounds all have Industrial products.When preparing lubricant additive of the present invention, a large amount of polyalkylene glycol (being made of the alkene that contains 2～3 carbon atoms), in a small amount aliphatic amide, ring grease amine or the mixture of the two, in a small amount phosphoric acid ester are mixed together and form.When preparing lubricant additive of the present invention, preferably with about 94～98.5%(weight) above-mentioned polyalkylene glycol, about 1.0～4.0%(weight) above-mentioned amine and about 0.5～2.0%(weight) above-mentioned phosphoric acid ester is mixed together and forms.One one-level arylamine, secondary aromatic amine or the mixture of the two can be incorporated in the amine component of this lubricant additive.
When using lubricant additive of the present invention, can in 5 quarts of new apply oils, add about 1 pint of lubricant additive.Lubricant additive of the present invention will provide effective protection to corrosion and the engine scuffing that is caused by methyl alcohol or ethanol in the oil draining period that (can reach 6000 miles sometimes) more than 4000 miles.
The effect of polyalkylene glycol (preferably polypropylene glycol) is methyl alcohol or alcoholic acid solubilizing agent, and is the scavenging agent of ashless dispersant and aldehydes.Require such solubilizing agent can dissolve a large amount of, in combustion processes, introduce methyl alcohol or ethanol in the lubricant.Polyalkylene glycol makes methyl alcohol or ethanol solubilising, thereby prevents to produce dry spot on top cylinder and the supporting surface.If there is not glycols to exist, then methyl alcohol or ethanol are insoluble in the hydrocarbon polymer lubricant, and produce dry spot.In addition, polyalkylene glycol contains hydroxyl, and these hydroxyls react with the aldehydes that forms in methyl alcohol or oxidation of ethanol.The product of polyalkylene glycol and formaldehyde or acetaldehyde reaction also is methyl alcohol or alcoholic acid good solvent, and has continued the effect of methyl alcohol or ethanol solubilizing agent.
The amine component plays the base number additive, can neutralize since methyl alcohol or oxidation of ethanol and water with carbon dioxide reaction and respectively generation formic acid or acetate and carbonic acid.The amine component also can play antioxidant, and methyl alcohol or the oxidation of ethanol reaction for its corresponding aldehyde and acids is reduced to a minimum.
The content of organic amine in the lubricant additive of the present invention (about 1.0～4.0 weight %) is big than the content in the common lubricant additive (about 0.25 weight %), the consumption of alkaline metal salt such as naphthenate and Sulfonates can be reduced to a minimum.Alkaline metal salt consumes when generating insoluble carbonate with the carbonic acid reaction, and this competes mutually with the neutralization reaction of carbonic acid.This neutralization reaction is very fast also more easily carries out, but just becomes a problem when organic amine consumes the postprecipitation reaction.If there is more organic amine to exist, so the more carbonic acid that then can neutralize is can be just less with the carbonic acid of alkaline metal salt reaction.
Phosphoric acid ester (preferably tricresyl phosphate (adjacent toluene) ester) plays antiwear agents, and is when being used with methyl alcohol or alcohol fuel, better than common antiwear agents zinc dialkyl dithiophosphate.Zinc dialkyl dithiophosphate almost generally is used for the used automotive lubricant of gasoline-fueled engine, but be in the engine of fuel with methyl alcohol or ethanol, since it easily and these alcohol carry out transesterification reaction, thereby lose its wear resistance very soon.
Lubricant additive can be estimated according to the quantity of abrasion element such as iron, lead and copper.Its quantity can be checked by the spectrochemical analysis of candidate oil after certain mileage of travelling behind the engine oil change.These metals or abrasion element occur in lubricant, are the results of these metal some engine pack excessive corrosion or damage and normal mechanical wearing and tearing.
List the standard of estimating lubricant abrasion element data in the table 1.Listed primary and less important source and every kind of average quantity (showing with the ppm numerical table) that wears away element of various abrasion elements in the engine in the table, these elements can be found out in lubricating oil in " break-in " point or " back break-in " point.The wearing and tearing grade of engine between run-in period is generally quite high.After engine was finished break-in, the wearing and tearing grade reached a flation, kept stable in about 50,000 miles, and these characteristics and Level Of Maintenances on vehicle are decided.For common engine, " break-in " point generally is positioned in 0～10,000 mile range.The judgement criteria of finding out in table 1 can be used for the data that provide in the evaluation example 1 to 4.
Base number is the yardstick of weighing the peace and quiet effect of lubricating oil and suppressing corrosive power.The base number of novel motor oil normally 4～5.For any lubricating oil, its value is 1 or when lower, the deposit of expression additive has had been depleted to hazard level.Base number is 2, is commonly referred to be the suitable boundary in gasoline-fueled engine.
Example 1
A candidate oil consist of common automotive lubricant and 10%(weight) lubricant additive of the present invention.Consisting of of this additive: polypropylene glycol 2000 about 97%(weight), about 1.0%(weight) Octadecane base amine, about 1%(weight) N-phenyl-2-naphthylamines and about 1%(weight) tricresyl phosphate (adjacent toluene) ester.It takes from methyl alcohol the crankcase of the engine C that is fuel.This engine C suitable 20,551 miles distance of having travelled was changed lubricating oil before 3942 miles.
The total basicnumber of this sample is 3.36.Its spectrochemical analysis is checked out and is contained the abrasion element of number of columns down in this candidate oil: iron 75ppm, plumbous 27ppm, copper 25ppm, chromium 1ppm, aluminium 9ppm, nickel 3ppm and tin 11ppm.This engine suitable 20.551 miles distance of having travelled, this is " back break-in " mileage.Therefore, this sample can use " back break-in " standard in the table 1 to estimate.
Base number 3.36 has been much higher than thinks suitable base number 2.These explanation Octadecane base amine and N-phenyl-two kinds of amine of 2-naphthylamines do not exhaust as yet, still can in formic acid and carbonic acid with prevent that methanol oxidation from becoming formaldehyde and formic acid.
According to table 1, the iron in this sample, lead, copper and chromium content are positioned at the average and permissible level scope of the corresponding abrasion element of " back break-in " mileage.Aluminium content 9ppm is than mean value height, but the excessive value 30ppm interior than " back break-in " mileage is also much lower.Nickel content 3ppm is than mean value height, but the excessive value 4ppm interior than " back break-in " mileage is also much lower.Tin content 11ppm is than mean value height, but the excessive value 15ppm interior than " back break-in " mileage is also much lower.
The data declaration that provides in the example 1: used lubricant additive of the present invention can will reduce to minimum degree effectively by containing corrosion and the engine scuffing that methanol fuel causes.
Example 2
A candidate oil consist of common automotive lubricant and 10%(weight) lubricant additive of the present invention.Consisting of of this lubricant: polypropylene glycol 2000 about 98%(weight), about 1.0%(weight) n-hexadecyl amine and about 1.0%(weight) tricresyl phosphate (adjacent toluene) ester.This sample is taken from methyl alcohol the crankcase of the engine B that is fuel.This engine B suitable 46.153 miles distance of having travelled was changed lubricating oil before about 3.421 miles.
The total basicnumber of this sample is 2.91.Its spectrochemical analysis is checked out and is contained the abrasion element of number of columns down in this sample: iron 87.7ppm, plumbous 67ppm, copper 96ppm, chromium 12ppm, aluminium 12ppm, nickel 4ppm and tin 11ppm.This engine suitable 46,153 miles distance of having travelled, this is " back break-in " mileage.Therefore, " back break-in " standard in this sample free list 1 is estimated.
Base number 2.91 has substantially exceeded suitable base number (base number 2), and this explanation amine component n-hexadecyl does not exhaust as yet, still can in and formic acid and carbonic acid, and can prevent that methanol oxidation from becoming formaldehyde and formic acid.
According to table 1, the content of iron, lead, copper and aluminium is positioned at the average and permissible level scope of the corresponding abrasion element of " back break-in " mileage.Because piston ring and the valve outofkilter of engine B, chromium and nickel content are higher than mean value.Piston ring and valve are the primary sources of abrasion elemental chromium and nickel, and this has just illustrated that these abrasion elements contain the reason that is higher than average content most in this candidate oil.
The low levels of main abrasion elemental iron, lead and copper and above-mentioned base number have illustrated that lubricant additive of the present invention can will be reduced to a minimum effectively by containing corrosion and the engine scuffing that methanol fuel causes.
Example 3
A candidate oil consist of common automotive lubricant and 10%(weight) lubricant additive of the present invention.Consisting of of this additive: polypropylene glycol 2000 about 98.0%(weight), about 1.0%(weight) Octadecane base amine and about 1.0%(weight) tricresyl phosphate (adjacent toluene) ester.This sample is taken from methyl alcohol the crankcase of the engine D that is fuel.This engine D suitable 73.395 miles distance of having travelled was changed lubricating oil before about 4,375 miles.
The total basicnumber of this sample is 2.46.Its spectrochemical analysis is checked out, contains the abrasion element of number of columns down in this sample: iron 73ppm, plumbous 20ppm, copper 64ppm, chromium 2ppm, aluminium 11ppm, nickel 2ppm and tin 0ppm.Actual service life is " back break-in " mileage, so " back break-in " standard in this sample free list 1 is estimated.
Base number 2.46 has substantially exceeded suitable base number 2, and this explanation amine component Octadecane base amine does not exhaust as yet, still can in and first carbonic acid and carbonic acid, and can prevent that methanol oxidation from being formaldehyde and formic acid.
According to table 1, the content of iron, lead, copper, chromium, al and ni is positioned at the average and permissible level scope of the corresponding abrasion element of " back break-in " mileage.Tin content is lower than the average content scope of tin.
Data declaration in the example 3, lubricant additive of the present invention can will be reduced to a minimum effectively by containing corrosion and the engine scuffing that methanol fuel causes.
Example 4
A candidate oil consist of common automotive lubricant and 10%(weight) lubricant additive of the present invention described in the example 3.This sample is taken from methyl alcohol the crankcase of the engine D that is fuel.This engine suitable 76.636 miles distance of having travelled was changed lubricating oil before about 4.164 miles.
The total basicnumber of this sample is 3.30, and its spectrochemical analysis is checked out, contains the abrasion element of number of columns down in this sample: iron 50ppm, plumbous 10ppm, copper 56ppm, chromium 2ppm, aluminium 7ppm, nickel 0ppm and tin 0ppm.
Base number 3.30 is much higher than suitable base number 2, illustrates that amine component Octadecane base amine does not exhaust as yet, still can in and formic acid and carbonic acid, and can prevent that methanol oxidation from being formaldehyde and formic acid.
According to table 1, the content of iron, lead, copper, chromium and aluminium, these wear away the average and tolerable limit of elements to be positioned at " back break-in " mileage.Nickel and tin content subaverage.
The data declaration that provides in the example 4, lubricant additive of the present invention can be minimized the engine scuffing and the corrosion that are caused by the fuel that contains methyl alcohol effectively.
Claims (18)
1, the lubricant additive that is used with Aalcohols fuel, the major part that it is characterized in that its composition is a kind of polyalkylene glycol (being made of the alkene that contains 2～3 carbon atoms); Sub-fraction is a kind of amine, amine described herein is a kind of aliphatic amide, a kind of ring grease amine, the mixture of a kind of aliphatic amide and a kind of ring grease amine, or a kind of aliphatic amide, a kind of ring grease amine or the two is together with a kind of one-level arylamine, a kind of secondary aromatic amine or the mixture of the two; Another small portion is a phosphoric acid ester.
2, the lubricant additive described in the claim 1, wherein said polyalkylene glycol content is about 94.0～98.5%(weight), described amine content is about 1.0～4.0%(weight), described phosphate ester content is about 0.5～2.0%(weight).
3, the lubricant additive described in the claim 1, wherein said polyalkylene glycol content is about 97.0～98.5%(weight), described amine content is about 1.0～2.0%(weight), described phosphate ester content is about 0.5～1.0%(weight).
4, the lubricant additive described in the claim 1, wherein said amine are a kind of aliphatic amides.
5, the lubricant additive described in the claim 1, wherein said amine are the mixtures of a kind of aliphatic amide and a kind of ring grease amine.
6, the lubricant additive described in the claim 1, wherein said amine are the mixtures of a kind of aliphatic amide and a kind of arylamine, and wherein said arylamine is a kind of one-level arylamine, a kind of secondary aromatic amine or the mixture of the two.
7, the lubricant additive described in the claim 1, wherein said polyalkylene glycol are polypropylene glycol, poly-Isopropanediol or polyoxyethylene glycol.
8, the lubricant additive described in the claim 7, wherein said polyalkylene glycol is a polypropylene glycol.
9, the lubricant additive described in the claim 8, the molecular weight that wherein said polypropylene glycol has is about 2000 gram/moles.
10, the lubricant additive described in the claim 1, wherein said one-level arylamine is O-Phenylene Diamine, mphenylenediamine, Ursol D, Ortho Toluidine, meta-aminotoluene, para-totuidine, aniline, xylidine, naphthylamines, benzylamine, tolylene diamine or naphthylene diamine.
11, the lubricant additive described in the claim 10, wherein said one-level arylamine is an O-Phenylene Diamine.
12, the lubricant additive described in the claim 1, wherein said secondary aromatic amine be N-phenyl-2-naphthylamines, phenyl-a-naphthylamine, Phenyl beta naphthylamine, tolyl-naphthylamines, pentanoic, diformazan for pentanoic, phenyltolyl amine, 4,4 '-diamino-diphenylamine or methylphenylamine.
13, the lubricant additive described in the claim 12, wherein said secondary aromatic amine are N-phenyl-2-naphthylamines.
14, the lubricant additive described in the claim 1, wherein said aliphatic amide are the aliphatic amides with 10～30 carbon atoms.
15, the lubricant additive described in the claim 14, wherein said aliphatic amide are octadecylamine or hexadecylamine.
16, the lubricant additive described in the claim 1, wherein said ring grease amine is hexahydroaniline or methyl cyclohexylamine.
17, the lubricant additive described in the claim 1, wherein said phosphoric acid ester are tricresyl phosphate (adjacent toluene) ester, tricresyl phosphate (toluene) ester, tricresyl phosphate (to toluene) ester, DBPP, tributyl phosphate, tricresyl phosphate (2-ethylhexyl) ester, trioctyl phosphate, ortho-phosphoric acid diphenyl ester, ortho-phosphoric acid two (toluene) ester, ortho-phosphoric acid three (octadecyl) ester or ortho-phosphoric acid three (dodecyl) ester.
18, the lubricant additive described in the claim 17, wherein said phosphoric acid ester are tricresyl phosphate (adjacent toluene) esters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86100480 CN86100480A (en) | 1984-05-01 | 1986-02-06 | The lubricant additive that is used with Aalcohols fuel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60588284A | 1984-05-01 | 1984-05-01 | |
| CN 86100480 CN86100480A (en) | 1984-05-01 | 1986-02-06 | The lubricant additive that is used with Aalcohols fuel |
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| Publication Number | Publication Date |
|---|---|
| CN86100480A true CN86100480A (en) | 1987-08-19 |
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ID=25742170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86100480 Pending CN86100480A (en) | 1984-05-01 | 1986-02-06 | The lubricant additive that is used with Aalcohols fuel |
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| CN (1) | CN86100480A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100471927C (en) * | 2004-03-09 | 2009-03-25 | 禾大国际股份公开有限公司 | Improved drilling fluids |
| CN102286300A (en) * | 2011-08-30 | 2011-12-21 | 山西华顿实业有限公司 | Metal corrosion inhibitor and preparation method thereof |
| CN109504514A (en) * | 2019-01-07 | 2019-03-22 | 大连理工大学 | A kind of method of convenient preparation carbon dots base lubricating fluid |
-
1986
- 1986-02-06 CN CN 86100480 patent/CN86100480A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100471927C (en) * | 2004-03-09 | 2009-03-25 | 禾大国际股份公开有限公司 | Improved drilling fluids |
| CN102286300A (en) * | 2011-08-30 | 2011-12-21 | 山西华顿实业有限公司 | Metal corrosion inhibitor and preparation method thereof |
| CN102286300B (en) * | 2011-08-30 | 2013-10-23 | 山西华顿实业有限公司 | Metal corrosion inhibitor and preparation method thereof |
| CN109504514A (en) * | 2019-01-07 | 2019-03-22 | 大连理工大学 | A kind of method of convenient preparation carbon dots base lubricating fluid |
| CN109504514B (en) * | 2019-01-07 | 2021-11-05 | 大连理工大学 | Method for conveniently preparing carbon dot-based lubricating liquid |
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