Low-ash lubricating oil composition

A technology of lubricating oil composition and ashless dispersant, which is applied in the direction of lubricating composition and petroleum industry to achieve good cleaning and dispersing properties, high temperature dispersibility, excellent viscosity-temperature characteristics, and excellent anti-wear effects

Active Publication Date: 2018-06-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, it will be a big challenge for gas engine oil to pas

Method used

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  • Low-ash lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Table 1 has provided the impact of different detergent formulation systems on CBT to further illustrate the present invention. In table 1, embodiment 11 and embodiment 12 are middle alkali value alkyl salicylate calcium and high alkali value sulfurized alkyl phenate calcium system, comparative example 11-comparative example 14 are other detergent systems, comparative example and embodiment all On the basis of meeting the requirements of sulfate ash and alkali value. Table 2 shows the results of the CBT test.

[0080] Table 1

[0081]

[0082] Table 2

[0083]

[0084]

[0085] As can be seen from Table 1 and Table 2, different detergent formulation systems have different influences on the anti-corrosion properties of oil products. What the embodiment adopted were medium-alkali value calcium alkyl salicylate and high-alkali value sulfurized alkylphenate calcium detergents. system, compared with other detergent systems, the CBT result of the oil is better, ind...

Embodiment 2

[0087] Table 3 shows the effect of specific corrosion inhibitors on CBT to further illustrate the invention. Examples 21 to 24 in Table 3 show the effects of adding different amounts of corrosion inhibitors on CBT. Table 4 shows the results of the CBT test.

[0088] table 3

[0089]

[0090] Table 4

[0091]

[0092] It can be seen from Table 3 and Table 4 that the addition of octadecylamine salt of isooctyl acid phosphate, which is usually used as an extreme pressure and antiwear agent, as a specific corrosion inhibitor can effectively improve the corrosion performance of oil products. Examples 22 and 23 When the addition amount of octadecylamine salt of isooctyl acid phosphate is 0.2 and 0.4, they all pass the CBT test. However, the addition amount increases again, and when it is 0.6, it cannot pass the CBT test, indicating that the addition amount of isooctyl acid phosphate octadecylamine salt cannot be too large.

Embodiment 3

[0094] Table 5 provides a series of experimental formulations to further illustrate the present invention. In Table 5, Comparative Example 31 is a commercial oil formulated with a commercially available compounding agent, which is currently the most widely used gas compounding agent in the world and is used as a standard for evaluating other oil products. Embodiment 31 and embodiment 32 are all-component 10W-40 low ash type gas engine lubricating oils of the present invention, and it contains middle base value alkyl salicylate, high base value sulfurized alkyl phenate, corrosion inhibitor, Borated dienyl succinimide ashless dispersant, polymer ashless dispersant, zinc dialkyldithiophosphate, phenolic auxiliary antioxidant and amine auxiliary antioxidant, etc. The components and contents are shown in Table 5, and the typical data thus obtained are listed in Table 6 and Table 7.

[0095] table 5

[0096]

[0097] Table 6

[0098]

[0099]

[0100] It can be seen from...

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Abstract

The invention relates to a low-ash lubricating oil composition. The lubricating oil composition comprises a detergent system consisting of 150-160 mg KOH/g of medium alkalinity alkyl salicylate and greater than or equal to 240 mg KOH/g of high alkalinity alkylphenol sulfide, a corrosion inhibitor, an ashless dispersing agent, an antioxidant preservative ZDDP, an auxiliary antioxidant, a pour pointdepressant, a viscosity index improver and base oil. The lubricating oil composition has sulfate ash content of less than or equal to 0.5wt% and alkalinity of greater than or equal to 5 mg KOH/g, satisfies the corrosion test (CBT) requirements, has the excellent oxidation resistance, nitrification resistance, abrasion resistance and corrosion resistance, and can provide good lubrication for heavy-duty high-power four-stroke mobile gas engines at home and abroad. The lubricating oil composition has a simple formula, realizes a low cost and is easy to prepare.

Description

technical field [0001] The invention relates to a low ash type lubricating oil composition, the sulfate ash content is not more than 0.5% (weight ratio), the alkali value is not less than 5mgKOH / g, has good corrosion resistance, passes the corrosion test (CBT), and meets the heavy The load mobile gas engine oil meets the requirements of CF level in GB11122-2006, and belongs to the technical field of lubricating oil and lubricating oil additives. Background technique [0002] In recent years, with the emergence of the world's energy crisis and the enhancement of people's awareness of environmental protection, natural gas, an alternative clean fuel, has received increasing attention. With the advancement of gas engine technology and the improvement of supporting facilities, gas engines are widely used. [0003] The operating conditions of gas engines are very different from those of ordinary fuel (gasoline or diesel) engines. Therefore, traditional engine oils are difficult t...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/25C10N10/04C10N30/12C10N30/10C10N30/08C10N30/06C10N30/04C10N30/02
CPCC10M169/048C10M2203/1006C10M2205/02C10M2205/022C10M2205/024C10M2207/144C10M2215/28C10M2219/044C10M2219/088C10M2219/089C10M2223/04C10M2223/045C10M2229/00C10N2010/04C10N2030/02C10N2030/04C10N2030/06C10N2030/08C10N2030/10C10N2030/12C10N2040/25C10N2030/45C10N2030/52
Inventor 张勤汤仲平李丽霞金鹏赵正华
Owner PETROCHINA CO LTD
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