Engine oil composition capable of reducing PM and PN values, engine oil and preparation method of engine oil
阅读说明：本技术 一种降低pm和pn值的发动机油组合物、发动机油及其制备方法 (Engine oil composition capable of reducing PM and PN values, engine oil and preparation method of engine oil ) 是由 李程 朱和菊 孙瑞雨 水琳 雷凌 金佳佳 付丽雪 赵磊 于 2021-06-30 设计创作，主要内容包括：本发明涉及一种降低PM和PN值的发动机油组合物、发动机油及其制备方法。按重量份计,以100重量份所述发动机油组合物为基准,该发动机油组合物包括：70-90重量份的基础油、7-20重量份的发动机油复合剂、2-8重量份的黏度指数改进剂、0.3-1重量份的摩擦改进剂和0.3-1重量份的降凝剂；其中,所述基础油包括III类基础油、III类+基础油、CTL基础油和PAO基础油,所述III类基础油、III类+基础油、CTL基础油和PAO基础油的重量比为(1-5)：(10-15)：(0.1-2)：1。本发明的发动机油满足PSA欧洲发动机油B71 2009规格要求,可有效降低汽车尾气中PM和PN值,并具有较低黏度。(The invention relates to an engine oil composition for reducing PM and PN values, an engine oil and a preparation method thereof. The engine oil composition comprises the following components in parts by weight based on 100 parts by weight of the engine oil composition: 70-90 parts of base oil, 7-20 parts of engine oil complexing agent, 2-8 parts of viscosity index improver, 0.3-1 part of friction improver and 0.3-1 part of pour point depressant; wherein the base oil comprises group III base oil, group III + base oil, CTL base oil and PAO base oil, and the weight ratio of the group III base oil, the group III + base oil, the CTL base oil and the PAO base oil is (1-5): (10-15): (0.1-2): 1. the engine oil disclosed by the invention meets the specification requirement of PSA European engine oil B712009, can effectively reduce PM and PN values in automobile exhaust, and has low viscosity.)
1. An engine oil composition, characterized by comprising, based on 100 parts by weight of the engine oil composition: 70-90 parts of base oil, 7-20 parts of engine oil complexing agent, 2-8 parts of viscosity index improver, 0.3-1 part of friction improver and 0.3-1 part of pour point depressant;
wherein the base oil comprises group III base oil, group III + base oil, CTL base oil and PAO base oil, and the weight ratio of the group III base oil, the group III + base oil, the CTL base oil and the PAO base oil is (1-5): (10-15): (0.1-2): 1.
2. the engine oil composition of claim 1, wherein the base oil has a viscosity designation No. 4 or No. 6 as specified by Q/SH PRD 0731-2018.
3. The engine oil composition of claim 1, wherein the base oil comprises a III4+ base oil, a III6 base oil, a CTL4 base oil, and a PAO6 base oil.
4. The engine oil composition of claim 1, wherein the weight ratio of the CTL base oil to the viscosity index improver is (0.6-1.5): 1.
5. the engine oil composition of claim 1, comprising, based on 100 parts by weight of the engine oil composition: 58-66 parts of III4+ base oil, 6-12 parts of III6 base oil, 3-6 parts of CTL4 base oil, 3-6 parts of PAO6 base oil, 14-17 parts of engine oil complexing agent, 4-6 parts of viscosity index improver, 0.5-0.8 part of friction improver and 0.3-0.5 part of pour point depressant.
6. The engine oil composition of claim 1, wherein the viscosity index improver comprises a PMA-type viscosity index improver.
7. The engine oil composition of claim 1, wherein the friction modifier comprises a molybdenum dialkyldithiocarbamate.
8. The engine oil composition of claim 1, wherein the pour point depressant comprises a PMA pour point depressant and/or a fumarate pour point depressant.
9. A method for producing an engine oil, characterized by using the engine oil composition according to any one of claims 1 to 8, comprising the steps of:
(1) preheating the friction modifier for 8-10h at 50-80 ℃;
(2) adding the base oil, the engine oil complexing agent, the viscosity index improver and the pour point depressant into a blending kettle and heating to 50-80 ℃;
(3) adding the preheated friction modifier in the step (1) into the blending kettle in the step (2), and stirring at the temperature of 50-80 ℃;
optionally, the stirring is mechanical stirring for more than 60min or pulsed stirring for more than 100 min.
10. An engine oil prepared by the method of claim 9;
optionally, the engine oil has a viscosity grade of 0W-20 or 5W-30.
Technical Field
The invention relates to the technical field of gasoline engine oil, and discloses an engine oil composition for reducing PM and PN values, engine oil and a preparation method thereof.
Background
The automobile exhaust emission refers to harmful substances such as CO (carbon monoxide), HC + NOx (hydrocarbon and nitrogen oxide), particulate matters and the like discharged from exhaust, wherein the fine particulate matter index is characterized by PM (particulate matter mass) and PN (particulate matter quantity). They are all harmful substances produced by the engine in the process of combustion and work, and the reasons for producing the harmful substances are different. CO is an intermediate product of incomplete fuel oil oxidation, CO is generated when oxygen is insufficient, and CO in exhaust gas is increased due to high concentration and uneven mixture. HC is unburned fuel, and part of the fuel is discharged without being burned in time due to uneven mixture, cold combustion chamber wall, and the like. NOx is a substance produced by fuel (gasoline) during combustion, and particulate matter is also a substance produced by oxygen deficit during fuel combustion.
With the increasing severity of automobile exhaust pollution, corresponding regulation and regulation are established for automobile exhaust emission in six and seventies in countries of the world, the progress of automobile emission control technology is promoted by strict regulation, and with the continuous improvement of automobile emission control technology, the formulation of higher standards becomes possible. Table 1 lists the national five national six standards and the euro six d standard emissions limit requirements comparison. As can be seen from Table 1, the national emission standards were established with reference to European emission standards, and the national fifth and European sixth compares the national sixth to CO and N without limitation on PN2Two indexes of O are tightened, and the national Liu b further treats CO, THC, NMHC and NO on the basis of the national Liu axAnd PM.
TABLE 1 comparison of emissions limits for the national Standard of five and six and the European Standard of six
The current regulation requires PN23, and future European seven emission regulations will add to the requirements of PN10, so that the particulate matter will be increasingly restricted, and therefore, the research on the emission pollutants from the engine oil point of view is necessary.
Disclosure of Invention
The invention aims to provide an engine oil composition for reducing PM and PN values, an engine oil and a preparation method thereof.
In order to achieve the above object, a first aspect of the present disclosure provides an engine oil composition comprising, based on 100 parts by weight of the engine oil composition: 70-90 parts of base oil, 7-20 parts of engine oil complexing agent, 2-8 parts of viscosity index improver, 0.3-1 part of friction improver and 0.3-1 part of pour point depressant;
wherein the base oil comprises group III base oil, group III + base oil, CTL base oil and PAO base oil, and the weight ratio of the group III base oil, the group III + base oil, the CTL base oil and the PAO base oil is (1-5): (10-15): (0.1-2): 1.
optionally, the base oil has a viscosity designation No. 4 or No. 6 as specified by Q/SH PRD 0731-2018.
Alternatively, the base oil comprises III4+ base oil, III6 base oil, CTL4 base oil, and PAO6 base oil.
Optionally, the weight ratio of the CTL base oil to the viscosity index improver is (0.6-1.5): 1.
optionally, the engine oil composition comprises, based on 100 parts by weight of the engine oil composition: 58-66 parts of III4+ base oil, 6-12 parts of III6 base oil, 3-6 parts of CTL4 base oil, 3-6 parts of PAO6 base oil, 14-17 parts of engine oil complexing agent, 4-6 parts of viscosity index improver, 0.5-0.8 part of friction improver and 0.3-0.5 part of pour point depressant.
Optionally, the viscosity index improver comprises a PMA type viscosity index improver.
Optionally, the friction modifier comprises molybdenum dialkyldithiocarbamate.
Optionally, the pour point depressant includes a PMA pour point depressant and/or a fumarate pour point depressant.
In a second aspect of the present disclosure, there is provided a method for preparing an engine oil, using the engine oil composition according to the first aspect of the present disclosure, the method comprising the steps of:
(1) preheating the friction modifier for 8-10h at 50-80 ℃;
(2) adding the base oil, the engine oil complexing agent, the viscosity index improver and the pour point depressant into a blending kettle and heating to 50-80 ℃;
(3) adding the preheated friction modifier in the step (1) into the blending kettle in the step (2), and stirring at the temperature of 50-80 ℃;
optionally, the stirring is mechanical stirring for more than 60min or pulsed stirring for more than 100 min.
A third aspect of the present disclosure is an engine oil prepared by the method of the second aspect of the present disclosure;
optionally, the engine oil has a viscosity grade of 0W-20 or 5W-30.
By the technical scheme, the engine oil composition, the engine oil and the preparation method thereof are provided, and the engine oil meets the specification requirement of PSA European engine oil B712009 by adopting a mixture of III base oil, III + base oil, CTL base oil and PAO base oil as the base oil, can reduce the PM value and the PN value in automobile exhaust emission to a greater extent, and has lower viscosity.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The first aspect of the present disclosure provides an engine oil composition, which includes, based on 100 parts by weight of the engine oil composition: 70-90 parts of base oil, 7-20 parts of engine oil complexing agent, 2-8 parts of viscosity index improver, 0.3-1 part of friction improver and 0.3-1 part of pour point depressant;
wherein the base oil comprises group III base oil, group III + base oil, CTL base oil and PAO base oil, and the weight ratio of the group III base oil, the group III + base oil, the CTL base oil and the PAO base oil is (1-5): (10-15): (0.1-2): 1. the base oil prepared by using the combination has low viscosity, and can effectively reduce PM and PN values in automobile exhaust emission.
In one embodiment of the disclosure, the weight ratio of CTL base oil to viscosity index improver is (0.6-1.5): 1, preferably (0.8-1.3): 1.
in one embodiment of the present disclosure, the base oil comprises III6 base oil, III4+ base oil, CTL4 base oil, and PAO6 base oil; further, the engine oil composition comprises the following components in parts by weight based on 100 parts by weight of the engine oil composition: 58-66 parts of III4+ base oil, 6-12 parts of III6 base oil, 3-6 parts of CTL4 base oil, 3-6 parts of PAO6 base oil, 14-17 parts of engine oil complexing agent, 4-6 parts of viscosity index improver, 0.5-0.8 part of friction improver and 0.3-0.5 part of pour point depressant. The preferable formula can effectively improve the index of the particulate matter discharged by the tail gas.
In order to obtain an engine oil with excellent overall performance, in a preferred embodiment of the present disclosure, the viscosity grades of the four base oils used herein are No. 4 or No. 6 as specified in Q/SH PRD 0731-2018.
To further improve the overall performance of the engine oil, in one embodiment of the present disclosure, the viscosity index improver may be a PMA type viscosity index improver, preferably a PMA type viscosity index improver manufactured by winning companies.
To further improve the overall performance of the engine oil, in one embodiment of the disclosure, the friction modifier comprises a molybdenum dialkyldithiocarbamate, preferably an S525 friction modifier manufactured by ADEKA corporation or a T1002 friction modifier manufactured by POUPC corporation.
To further improve the overall performance of the composition, in one embodiment of the disclosure, the pour point depressant comprises a PMA pour point depressant and/or a fumarate pour point depressant, preferably a PMA pour point depressant manufactured by Woods.
In one embodiment of the present disclosure, the engine oil complex used in the present disclosure is preferably an engine oil complex that meets the requirements of the specification of PSA european engine oil B712009, produced by luyinji corporation.
The composition has good synergistic effect, shows better effect of improving the exhaust emission particulate matters and has lower viscosity by optimizing the components and the dosage.
In a second aspect of the present disclosure, a method for preparing an engine oil, using the engine oil composition of the first aspect of the present disclosure, comprises the steps of:
(1) preheating the friction modifier for 8-10h at 50-80 ℃;
(2) adding base oil, an engine oil complexing agent, a viscosity index improver and a pour point depressant into a blending kettle, and heating to 50-80 ℃;
(3) adding the preheated friction modifier in the step (1) into the blending kettle in the step (2), and stirring at 50-80 ℃.
In order to ensure that the components can be sufficiently stirred and mixed in the step (3), in one embodiment of the disclosure, the stirring may be mechanical stirring or pulse stirring, wherein the mechanical stirring time is more than 60min, and the pulse stirring time is more than 100 min.
In the present disclosure, the blending kettle used is conventional in the art, and can accomplish the preparation of the engine oil of the present disclosure. The heating method in the steps (1) to (3) is conventional, for example, the heating method can be a water vapor heat exchange heating method, and no special requirement is made here.
A third aspect of the present disclosure provides an engine oil prepared using the method of the second aspect of the present disclosure.
In one embodiment of the present disclosure, the engine oil has a viscosity grade of 0W-20 or 5W-30, preferably 0W-20.
Examples 1 to 3 and comparative examples 1 to 5
The components were weighed according to table 2 and an engine oil was prepared as follows:
(1) preheating the friction modifier at 50-80 ℃ for 8-10 h;
(2) adding base oil, an engine oil complexing agent, a viscosity index improver and a pour point depressant into a blending kettle, and heating to 50-80 ℃;
(3) and (2) adding the preheated friction modifier in the step (1) into the blending kettle, and mechanically stirring for 60min at the temperature of 50-80 ℃.
The engine oil compositions, viscosity index improvers, friction modifiers, and pour point depressants used in examples 1-3 and comparative examples 1-5 above are all commercially available.
The engine oils prepared in examples 1-3 and comparative examples 1-5 were subjected to an exhaust particulate matter test using the PSA SOP 01418 — 19 — 00110 method of the PSA european engine oil B712009 specification, and the specific test results are shown in table 3.
TABLE 2 tables of formulations of examples and comparative examples
Content/part by weight
Example 1
Example 2
Example 3
Comparative example 1
Comparative example 2
Comparative example 3
Comparative example 4
Comparative example 5
III4+ base oil
59.3
57
60.5
79.6
64.3
60.3
59.3
59.3
III6 base oil
10
10
10
0
5
0
15
13
CTL4 base oil
5
6.9
3
0
0
4
5
5
PAO6 base oil
5
5
5
0
10
15
0
2
Engine oil complexing agent
15.4
15.4
15.4
15.4
15.4
15.4
15.4
15.4
Viscosity index improver
4.3
4.7
5.1
4
4.3
4.3
4.3
4.3
Friction modifiers
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
Pour point depressant
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Table 3 table of test results of particulate matters in exhaust gas of examples and comparative examples
Contaminants
PM，(mg/km)
PN10 (one/km)
PN23 (one/km)
Example 1
0.19
1.82×1012
1.15×1012
Example 2
0.20
1.87×1012
1.17×1012
Example 3
0.21
1.91×1012
1.18×1012
Comparative example 1
0.23
2.19×1012
1.20×1012
Comparative example 2
0.27
2.94×1012
1.74×1012
Comparative example 3
0.25
2.65×1012
1.58×1012
Comparative example 4
0.23
2.27×1012
1.29×1012
Comparative example 5
0.21
1.93×1012
1.20×1012
The viscosity grades of the engine oils prepared in the above examples 1 to 3 are 0W to 20, and meet the specification requirements of PSA european engine oil B712009, and as can be seen from the data in table 3, the engine oils prepared by using the engine oil composition of the present disclosure can effectively reduce the PM value and the PN value of the automobile exhaust.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
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