Additive composition for improving fuel economy as well as preparation method and application of additive composition

Abstract

The invention discloses an additive composition for improving fuel economy and a preparation method and application thereof, and the additive composition comprises the following components by mass: 20-60 parts of a fuel economy improver; 20 to 50 parts of an antioxidant; 1-10 parts of an auxiliary antioxidant; 1-5 parts of a detergent; 1-5 parts of an ashless dispersant; and the balance of base oil. The engine oil has the beneficial effects that the organic molybdenum additive is selected and can play a synergistic anti-friction and anti-wear effect with ZDDP in engine oil, noise is reduced, and oil consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricating oil additives, and in particular relates to an additive composition for improving fuel economy, a preparation method and an application thereof. Background Art

[0002] In the field of traditional fuel additives, single-type antioxidants (such as amine or phenol) often have the problem of limited temperature applicability: phenol-type antioxidants can effectively terminate free radical chain reactions in the low-temperature range (<100°C), but are easily deactivated under high-temperature conditions; while amine-type antioxidants perform well in the high-temperature range (above 120°C), they are insufficient in inhibiting low-temperature oxidation. Existing technologies usually adopt the method of increasing the dosage of a single component or simple compounding, which not only increases costs, but may also lead to the formation of high-temperature deposits or a sudden drop in low-temperature antioxidant efficiency due to insufficient synergistic effects between antioxidants. This temperature response defect seriously restricts the oxidation stability of the fuel system under all operating conditions. It is urgent to achieve breakthroughs in molecular structure design and compounding technology to achieve efficient synergistic inhibition of free radical chain reactions in a wide temperature range. Summary of the Invention

[0003] In view of this, the present invention aims to provide an additive composition for improving fuel economy, a preparation method thereof, and an application thereof, so as to solve at least one technical problem in the background technology.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An additive composition for improving fuel economy, comprising the following components by mass percentage:

[0006] 20-60 parts of fuel economy improver;

[0007] 20-50 parts of antioxidant;

[0008] 1 to 10 parts of auxiliary antioxidant;

[0009] 1 to 5 parts of detergent;

[0010] 1-5 parts of ashless dispersant;

[0011] The balance is base oil.

[0012] Furthermore, the fuel economy improver includes one or more of a molybdenum amine compound, a molybdenum dialkyldithiophosphate, or a molybdenum dialkyldithiocarbamate.

[0013] Furthermore, the antioxidant includes one or more of diphenylamine and its derivatives.

[0014] Preferably, the antioxidant includes one or more of diphenylamine, 4,4'-diisooctyldiphenylamine, octyl / nonyldiphenylamine, thiodiphenylamine, and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0015] Furthermore, the auxiliary antioxidant includes one or more of a polymer phenol antioxidant or a modified polymer phenol antioxidant.

[0016] Preferably, the auxiliary antioxidant includes one or more of 2,6-di-tert-butyl-p-cresol, 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, octyl / nonylphenol derivatives, hydroquinone derivatives, and 4,4'-thiobis(6-tert-butyl-3-methylphenol).

[0017] Furthermore, the detergent is high-base calcium sulfonate, the ashless dispersant is high-molecular-weight succinimide, and the base oil is deeply hydrogenated mineral oil or synthetic polyalphaolefin.

[0018] Furthermore, the preparation of the modified polymer phenol antioxidant as a homemade additive comprises the following steps:

[0019] A1: Add resorcinol and acetaldehyde to a mixed solution of ethanol and water, purge with nitrogen to displace the air, add concentrated hydrochloric acid dropwise and react, then increase the temperature to continue the reaction, cool to room temperature, and purify to obtain the intermediate;

[0020] A2: Add the intermediate, acetaldehyde solution and 1-undecaprol to a solvent, dissolve them, add triethylamine, heat and react for a period of time, and then purify to obtain a modified polymer phenol antioxidant.

[0021] Furthermore, the solvent in step A2 is a mixed solution of ethanol and chloroform;

[0022] and / or, the time for blowing nitrogen to replace air in step A1 is 25-35 minutes;

[0023] and / or, the reaction time of dropwise addition of concentrated hydrochloric acid in step A1 is 15-25 min;

[0024] And / or, the temperature for continuing the reaction in step A1 is 70-80°C and the time is 2.5-3.5h;

[0025] And / or, after the dropwise addition in step A2 is completed, the temperature is raised to 55-65° C. and the reaction is carried out for 22-26 hours.

[0026] The above-mentioned method for preparing an additive composition for improving fuel economy includes the following steps: heating the base oil, adding a fuel economy improver, a detergent, an ashless dispersant, an auxiliary antioxidant, and an antioxidant in proportion, and stirring to obtain an additive composition for improving fuel economy.

[0027] Furthermore, the base oil is heated to a temperature of 55 to 65°C;

[0028] And / or, the stirring time shall not be less than 30 minutes each time new raw materials are added, and stirring shall be continued for 90 minutes after all raw materials are added.

[0029] The additive composition for improving fuel economy is applied to lubricating oil for shunting or lubricating oil for finished vehicles, and the amount added to the lubricating oil for finished vehicles is 1% to 5%.

[0030] Compared with the prior art, the additive composition for improving fuel economy, the preparation method and application thereof of the present invention have the following advantages:

[0031] 1. This application uses organic molybdenum additives, which can synergistically reduce friction and anti-wear effects with ZDDP in engine oil, reduce noise, and lower fuel consumption.

[0032] 2. This application effectively prevents the free radical chain reaction at different temperatures by combining amine and phenolic antioxidants. The combination of multiple oxidants can provide hydrogen atoms to capture free radicals, terminate the chain reaction, and decompose peroxides through auxiliary antioxidants, inhibiting further oxidation reactions.

[0033] 3. The present application uses a combination of multiple antioxidants to produce a synergistic effect. The highly active antioxidant can provide active hydrogen atoms, thereby terminating the ROO chain reaction, and the generated antioxidant free radical can obtain an H atom from the less active antioxidant and regenerate, thereby making the highly active antioxidant effective for a long time.

[0034] 4. The organic molybdenum oil used in this application has excellent solubility, so a deeply saturated base oil is selected. This type of base oil has poor solubility for additives but excellent oxidation resistance, which can complement the selected organic molybdenum, ensuring that the composition has both good lubricity and oxidation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 is the PDSC oxidation induction time of Shell Helix 0W-20;

[0037] Figure 2 It is the PDSC oxidation induction time of Shell Helix 0W-20+4% Example 1. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0040] In the following examples, non-sulfur and phosphorus oil-soluble organic molybdenum QT402 was purchased from Super Smooth Technology Foshan Co., Ltd., and non-sulfur and phosphorus oil-soluble organic molybdenum Molyvan855 was purchased from Vanderbilt Corporation;

[0041] Overbased calcium sulfonate RF1106D was purchased from Xinxiang Ruifeng New Materials Co., Ltd.;

[0042] High molecular weight succinimide RF1161H was purchased from Xinxiang Ruifeng New Materials Co., Ltd.;

[0043] Antioxidants Vanlube 7723 and Vanlube 961 were purchased from Vanderbilt. Antioxidant Vanlube 7723 is 4,4'-thiobis(6-tert-butyl-3-methylphenol), and Vanlube 961 is 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0044] Base oil 150N was purchased from Ssangyong of South Korea, base oils Yubase 4Plus, Yubase 4A, and Yubase6 were purchased from SK Group of South Korea, base oil PAO4 was purchased from Mobil, and base oil AN5 was purchased from Absorbene Technology (Hangzhou) Co., Ltd.

[0045] The preparation steps of modified polymer phenol antioxidant QT539 are as follows:

[0046] (1) To a mixed solution of 200 ml of ethanol and 200 ml of water, add 0.4 mol of resorcinol and 0.4 mol of acetaldehyde, introduce nitrogen gas for 30 min to displace the air, add 100 ml of concentrated hydrochloric acid dropwise and react for 20 min, then heat to 75°C and continue the reaction for 3 h. Cool to room temperature and filter to obtain the intermediate.

[0047] (2) 11 g of the intermediate, 11 g of acetaldehyde, and 18 g of 1-undecaprol were added to a mixed solution of 200 ml of ethanol and 200 ml of chloroform. After dissolution, 11 g of triethylamine was added dropwise. After the addition was completed, the temperature was raised to 60°C and the reaction was continued for 24 hours. After the reaction was completed, the modified polymer phenol antioxidant (code-named QT539) was obtained by purification.

[0048] Example

[0049] After heating the base oil to 60°C, a fuel economy improver, a detergent, an ashless dispersant, an auxiliary antioxidant, and an antioxidant are added in proportion. The stirring time is at least 30 minutes after each addition of new raw materials. After all the raw materials are added, stirring is continued for 90 minutes to obtain a modified polymer phenol antioxidant.

[0050] Table 1 Components of Examples 1-9 and Comparative Example 6

[0051]

[0052]

[0053] Application Example 1

[0054] PDSC Oxidation Induction Time (OIT) tests were conducted at 210°C using 4% of the additive composition added to various gasoline engine oils. The OIT times in parentheses are those without the composition. Fuel consumption was then compared with gasoline engine oils without the additive composition in a road test, and the fuel consumption reduction was calculated.

[0055] Table 2 PDSC oxidation induction period test results

[0056]

[0057]

[0058] Experimental data shows that the addition of an antioxidant (Vanlube 961) significantly increases the oxidation induction time (OIT) of gasoline engine oil, as shown in Example 1 (OIT = 42.5 min) compared to Comparative Example 1 (OIT = 36.0 min), demonstrating that antioxidants effectively delay oil oxidation. However, Comparative Example 3 (using Vanlube 7723) exhibits a lower OIT (36.2 min), indicating that different antioxidants have different performance characteristics and that Vanlube 961 is more suitable for this formulation. Furthermore, Comparative Example 4 (where the antioxidant content is reduced to 10%) exhibits an OIT of only 33.5 min, further demonstrating that a 30% antioxidant content is the preferred choice.

[0059] Fuel economy improver (QT401 or Molyvan 855) plays a key role in reducing fuel consumption. The fuel consumption reduction rate of Examples 1-3 all exceeded 6%, while the fuel consumption of Comparative Example 5 (no fuel economy improver) remained basically unchanged (-0.2%), indicating that this component is indispensable.

[0060] The secondary antioxidant (QT539) enhances oxidative stability. The OIT (34.7 min) of Comparative Example 6 (no secondary antioxidant) is lower than that of Example 1 (42.5 min), indicating a synergistic effect between QT539 and the primary antioxidant, further enhancing the oil's antioxidant capacity.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An additive composition for improving fuel economy, characterized in that: Calculated by mass percentage, it includes the following components: 20-60 parts of fuel economy improver; 20-50 parts of antioxidant; 1 to 10 parts of auxiliary antioxidant; 1 to 5 parts of detergent; 1-5 parts of ashless dispersant; The balance is base oil.

2. The additive composition for improving fuel economy according to claim 1, characterized in that: The fuel economy improver includes one or more of a molybdenum amine compound, a molybdenum dialkyldithiophosphate, or a molybdenum dialkyldithiocarbamate.

3. The additive composition for improving fuel economy according to claim 1, characterized in that: The antioxidant includes one or more of diphenylamine and its derivatives.

4. The additive composition for improving fuel economy according to claim 1, characterized in that: The auxiliary antioxidant includes one or more of a high molecular weight phenol antioxidant or a modified high molecular weight phenol antioxidant.

5. The additive composition for improving fuel economy according to claim 1, characterized in that: The detergent is high-alkalinity calcium sulfonate, the ashless dispersant is high-molecular-weight succinimide, and the base oil is deeply hydrogenated mineral oil or synthetic polyalphaolefin.

6. The additive composition for improving fuel economy according to claim 1, characterized in that: The preparation of modified polymer phenol antioxidant as a homemade additive includes the following steps: A1: Add resorcinol and acetaldehyde to a mixed solution of ethanol and water, purge with nitrogen to displace the air, add concentrated hydrochloric acid dropwise and react, then increase the temperature to continue the reaction, cool to room temperature, and purify to obtain the intermediate; A2: Add the intermediate, acetaldehyde solution and 1-undecaprol to a solvent, dissolve them, add triethylamine, heat and react for a period of time, and then purify to obtain a modified polymer phenol antioxidant.

7. The additive composition for improving fuel economy according to claim 6, characterized in that: The solvent in step A2 is a mixed solution of ethanol and chloroform; and / or, the time for blowing nitrogen to replace air in step A1 is 25-35 minutes; and / or, the reaction time of dropwise addition of concentrated hydrochloric acid in step A1 is 15-25 min; And / or, the temperature for continuing the reaction in step A1 is 70-80°C and the time is 2.5-3.5h; And / or, after the dropwise addition in step A2 is completed, the temperature is raised to 55-65° C. and the reaction is carried out for 22-26 hours.

8. A method for preparing an additive composition for improving fuel economy according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: heating the base oil, sequentially adding a fuel economy improver, a detergent, an ashless dispersant, an auxiliary antioxidant and an antioxidant in proportion, and stirring to obtain an additive composition for improving fuel economy.

9. The method for preparing the additive composition for improving fuel economy according to claim 8, characterized in that: The base oil is heated to a temperature of 55-65°C; And / or, the stirring time shall not be less than 30 minutes each time new raw materials are added, and stirring shall be continued for 90 minutes after all raw materials are added.

10. The additive composition for improving fuel economy according to any one of claims 1 to 7 is applied to lubricating oil for shunting or finished vehicle lubricating oil, characterized in that: The addition amount of finished automotive lubricant is 1% to 5%.

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