CN104087378A

CN104087378A - Dimethyl ether compression ignition type engine oil composition

Info

Publication number: CN104087378A
Application number: CN201410333146.8A
Authority: CN
Inventors: 黄福川; 黄孝平; 邓富康; 李康春; 黄伊琳; 马骁飞; 陈彪; 刘宇恒; 黄旖瑶
Original assignee: Guangxi University
Current assignee: NANNING YUYAN NEW ENERGY SCIENCE & TECHNOLOGY CO., LTD.
Priority date: 2014-07-14
Filing date: 2014-07-14
Publication date: 2014-10-08
Anticipated expiration: 2034-07-14
Also published as: CN104087378B

Abstract

The invention discloses a dimethyl ether compression ignition type engine oil composition. Gas to liquid (GTL) and poly internal olefin are adopted as base oil, and multiple compound additives, including an oiliness agent, an antioxidant preservative, an anti-foaming agent, a viscosity index improver, a metal passivator, a friction improver, a cleaning agent, a dispersing agent, an antioxidant and an antirust agent, are blended. The dimethyl ether compression ignition type engine oil composition has good cleanliness and dispersibility, viscosity-temperature characteristic, base number retainability and acid neutralization capacity, can inhibit generation of polar materials such as oil sludge; the dimethyl ether compression ignition type engine oil composition also has good high temperature oxidation stability, solubilizing and scooting capacity, wear resistance, shear resistance, antifriction and anticorrosion properties, good low temperature startability and low ash content, can be used for reducing generation of carbon deposit and paint films in an engine under the high temperature condition, abnormal wear and corrosion of a bearing bush during starting and accelerated service are prevented, and the service life and an oil draining period of the engine are prolonged.

Description

A kind of dme self-igniton engine oil compositions

Technical field

The invention belongs to internal combustion engine lubricant field, particularly a kind of dme self-igniton engine oil compositions.

Background technology

Dme (DME) can be from coal, Sweet natural gas and biorefinery out.Use DME as pressure combustion motor fuel, only the prime the fuel system of diesel engine is made improvements and can be used.DME engine is compared with using diesel oil, does not need to adopt scheme for exhaust gas circulation system and treatment unit, and its thermo-efficiency increases, NO _xquantity discharged obviously reduces, granular material discharged less, and useless cigarette discharge is almost nil, substantially can reach smokeless combustion.Therefore, the latent heat of vaporization of DME approaches the twice of diesel oil, because evaporation endothermic can reduce mixture temperature in cylinder, is conducive to suppress NO _xgeneration; Its cetane value is higher than diesel oil, is the Ideal Substitute of diesel oil, does not need need to adopt combustion-supporting measure as methyl alcohol, ethanol, liquefied petroleum gas (LPG) and Sweet natural gas; Its calorific value is lower, is only 64.7% of diesel oil, and chemically correct fuel is low, in order to meet the dynamic property of diesel engine, increase the fuel delivery per cycle of DME.DME is a kind of colourless inflammable gas under normal temperature, normal pressure, has slight ether taste.Nontoxic, non-corrosiveness, environmental friendliness, in air, long-term exposure can not form superoxide.It has good compatibility, is soluble in 3 kinds of organic solvents such as gasoline, tetracol phenixin, acetone, chlorobenzene and methyl acetate, adds a small amount of auxiliary agent, can dissolve each other with water usage ratio.DME has good combustionproperty, and dynamic performance is good, pollute less, press and be liquid a little, is easy to store.Therefore, exploitation dme self-igniton engine oil compositions is significant.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of have good detergent-dispersant performance, sticky-temperature characteristics, base number retentivity, acid neutralization capacity, can suppress the generation of greasy filth isopolarity material; Good high-temperature oxidation stability, solubilising soot ability, wear-resistant, anti-shearing and anti-friction and corrosion-resistant performance, cold cranking capacity is good, ash content is low, can reduce the generation of engine carbon deposit, paint film under hot conditions, prevent inordinate wear and the bearing insert corrosion of engine when startup and Accelerating running, the dme self-igniton engine oil compositions of increasing service life of engine and oil draining period.

For above-mentioned technical problem, the present invention adopts following technical scheme:

A dme self-igniton engine oil compositions, adopts natural gas synthetic oil and poly-internal olefin as base oil, coordinates multiple composite additive, and the mass percent of its each component is:

Component	Mass percent content
		Base oil	Surplus

Purification agent	3.0％～5.0％
		Dispersion agent	5.0％～8.0％
Antioxidant preservative	1.0％～2.0％
		Oxidation inhibitor	0.8％～1.2％
Oiliness improver	0.8％～1.0％
		Metal passivator	0.5％～1.0％
Friction improver	2.0％～3.0％
		Rust-preventive agent	0.5％～1.5％
Kilfoam	0.005％～0.008％
		Viscosity index improver	3.0％～5.0％

The mass percent summation of each component is 100%.

Base oil is that natural gas synthetic oil and 50%～60% the poly-internal olefin of mass ratio 50%～40% is compound.

Purification agent is that low alkali value calcium alkylbenzenesulfonate, 25%～30% high base number calcium alkylbenzenesulfonate and 50%～40% the Overbased magnesium sulphonates of mass ratio 25%～30% is compound, and the mass percent summation of above-mentioned three components is 100%; Dispersion agent is that polyisobutylene-bis-succinimide T154, many succimides of polyisobutene T155 of 30%～35% and 40%～30% the boronation polyisobutylene-bis-succinimide T161B of mass ratio 30%～35% is compound, and the mass percent summation of above-mentioned three components is 100.

Antioxidant preservative is that the sulphur phosphorus brothers base zinc salt of the two octyl group basic zinc salt of the sulphur phosphorus of mass ratio 50%～60% and 50%～40% is compound; Oxidation inhibitor is 2 of mass ratio 40%～50%, and 6-di-t-butyl mixed ester and 60%～50% nonyl diphenylamine are compound.

Oiliness improver is alkylthio molybdenum phosphate.

Metal passivator is that 124 Triazole derivative and 60%～50% the thiadiazoles derivative of mass ratio 40%～50% is compound.

Friction improver is phosphoric acid ester.

Rust-preventive agent is that alkenyl succinic acid half ester and 60%～50% the benzotriazole of mass ratio 40%～50% is compound.

Kilfoam is that methyl-silicone oil and 60%～50% acrylate and the ether copolymer of mass ratio 40%～50% is compound.

Viscosity index improver is polymethacrylate.

Remarkable advantage of the present invention has: good detergent-dispersant performance, sticky-temperature characteristics, base number retentivity, acid neutralization capacity, can suppress the generation of greasy filth isopolarity material; Good high-temperature oxidation stability, solubilising soot ability, wear-resistant, anti-shearing and anti-friction and corrosion-resistant performance, cold cranking capacity is good, ash content is low, can reduce the generation of engine carbon deposit, paint film under hot conditions, prevent inordinate wear and bearing insert corrosion, increasing service life of engine and the oil draining period of engine when startup and Accelerating running.

Embodiment

Embodiment 1: each component of following mass percent is in harmonious proportion and is formed:

Embodiment 2: each component of following mass percent is in harmonious proportion and is formed:

Embodiment 3:

Each component of following mass percent is in harmonious proportion and is formed:

The main physical and chemical index of embodiment 1 product:

Claims

1. a dme self-igniton engine oil compositions, is characterized in that: adopt natural gas synthetic oil and poly-internal olefin as base oil, coordinate multiple composite additive, the mass percent of its each component is:

Component Mass percent content Base oil Surplus Purification agent 3.0％～5.0％ Dispersion agent 5.0％～8.0％ Antioxidant preservative 1.0％～2.0％ Oxidation inhibitor 0.8％～1.2％ Oiliness improver 0.8％～1.0％ Metal passivator 0.5％～1.0％ Friction improver 2.0％～3.0％ Rust-preventive agent 0.5％～1.5％ Kilfoam 0.005％～0.008％ Viscosity index improver 3.0％～5.0％

The mass percent summation of each component is 100% above.

2. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, base oil is that natural gas synthetic oil and 50%～60% the poly-internal olefin of mass ratio 50%～40% is compound.

3. a kind of dme self-igniton engine oil compositions as claimed in claim 1, it is characterized in that, purification agent is that low alkali value calcium alkylbenzenesulfonate, 25%～30% high base number calcium alkylbenzenesulfonate and 50%～40% the Overbased magnesium sulphonates of mass ratio 25%～30% is compound, and the mass percent summation of above-mentioned three components is 100%; Dispersion agent is that polyisobutylene-bis-succinimide T154, many succimides of polyisobutene T155 of 30%～35% and 40%～30% the boronation polyisobutylene-bis-succinimide T161B of mass ratio 30%～35% is compound, and the mass percent summation of above-mentioned three components is 100.

4. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, antioxidant preservative is that the sulphur phosphorus brothers base zinc salt of the two octyl group basic zinc salt of the sulphur phosphorus of mass ratio 50%～60% and 50%～40% is compound; Oxidation inhibitor is 2 of mass ratio 40%～50%, and 6-di-t-butyl mixed ester and 60%～50% nonyl diphenylamine are compound.

5. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, oiliness improver is alkylthio molybdenum phosphate.

6. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, metal passivator is that 124 Triazole derivative and 60%～50% the thiadiazoles derivative of mass ratio 40%～50% is compound.

7. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, friction improver is phosphoric acid ester.

8. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, rust-preventive agent is that alkenyl succinic acid half ester and 60%～50% the benzotriazole of mass ratio 40%～50% is compound.

9. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, kilfoam is that methyl-silicone oil and 60%～50% acrylate and the ether copolymer of mass ratio 40%～50% is compound.

10. a kind of dme self-igniton engine oil compositions as claimed in claim 1, is characterized in that, viscosity index improver is polymethacrylate.