Anti-oxidation lubricating oil composition

A lubricating oil composition and lubricating oil technology, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problems of limited amount of additives, insufficient to meet the requirements of use, etc., and achieve the effect of good compatibility

Inactive Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The upgrade of oil products, especially the limitation of phosphorus content and sulfur content, makes the additive amount of zinc dialkyldithiophosphate (ZDDP) as the main antioxidant component in the internal combustion engine oil formula limited, and the use of ZDDP alone is not enough Meet the use requirements

Method used

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  • Anti-oxidation lubricating oil composition
  • Anti-oxidation lubricating oil composition
  • Anti-oxidation lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0036] Examples 1-5 are additive products and main properties of the present invention. Add each component I and component II into a mixing container in proportion, heat at 60-90°C under normal pressure, and stir for 1-2 hours to obtain a uniform transparent light yellow viscous liquid, which is the product of the present invention. The results are shown in Table 1.

[0037] Table 1

[0038] serial number

[0039] Example 5

Embodiment 6

[0041] In this example, the anti-oxidation effect of lubricating oil is evaluated according to the method of rotating oxygen bomb test ASTM D2272. The rotating oxygen bomb test is a rapid screening method and is a commonly used experiment for evaluating the oxidation stability of engine oil and industrial lubricating oil. The test instrument consists of a pressure bomb and an oil bath. The pressure bomb is rotated at 30° with the horizontal plane. The oil bath is kept at a constant temperature of 150°C. 50 grams of test oil, 5 grams of water and a copper ring catalyst are added to the glass together, and oxygenated at room temperature. 620kPa (90psi), put the oxygen bomb into the oil bath, the oxygen pressure rises rapidly and remains constant, record the time when the oxygen pressure drops 170kPa (25psi) from the highest point, as the oil sample oxidation induction period. The oil used in the test was 150N hydrogenated base oil produced by Sinopec Gaoqiao Petrochemical Company...

Embodiment 7

[0046]In the prepared SJ gasoline engine oil 5W / 30 test oil, a dosage of 0.38% of antioxidant and 6.62% of the remaining additives were added, and the thin layer oxidation test (TFOUT) was carried out, and the pressure differential thermal scanning test was carried out. (PDSC), high temperature sediment evaluation test (TEOST) and IIIE simulation test (VIT); among them, thin layer oxidation test (TFOUT) is carried out according to ASTM D2272; PDSC set temperature is 220 ℃; IIIE simulation test (VIT) for viscosity growth Investigate that the test conditions are 160°C, the oxygen flow rate is 5L / h, and calculate the time when the viscosity growth rate is 375%. The specific results are shown in Table 3.

[0047] table 3

[0048]

[0049] It can be seen from Table 3 that at a high temperature of 220°C, the composite antioxidant effectively improves the oxidation induction period (PDSC) of the oil, and the oxidation induction period of the oil in the comparative example is usua...

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PUM

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Abstract

The invention provides a lubricating oil composite antioxidant by using synergy generated by compounding among antioxidants of different types. The composite antioxidant at least comprises the following components: (1) alkylated diphenylamine antioxidant; (2) thiophenolic ester antioxidant; and (3) thioether phenolic antioxidant. The invention also provides a lubricating oil composition with oxidation stability. The invention also provides a method for improving oxidation stability of lubricating oil. The composite antioxidant does not contain diluent, can partially replace the consumption of zinc dialkyldithio-phosphate (ZDDP), has predominant effect of controlling the viscosity increment of oil, has obvious inhibiting effect on generation of sediments, and particularly has cleaning effect on the surface of a piston. The composite antioxidant has good compatibility with other component additives, and can be prepared into the lubricating oil composition such as hydraulic oil, steam turbine oil, gear oil, heat conducting oil and the like.

Description

technical field [0001] The present invention relates to a lubricating oil composition, more precisely, a lubricating oil composition having good oxidation stability. Background technique [0002] Environmental protection and energy saving are the main driving forces to promote the upgrading of internal combustion engine oil. With the continuous stringent emission regulations, the requirements for engine emissions are becoming more and more stringent, which greatly accelerates the pace of upgrading internal combustion engine oil. The product specifications of gasoline engine oil are gradually changed from GF-2 is upgraded to GF-4, and GF-5 will be launched soon, which also puts forward higher requirements for lubricating oil additives. The upgrade of oil products, especially the limitation of phosphorus content and sulfur content, makes the additive amount of zinc dialkyldithiophosphate (ZDDP) as the main antioxidant component in the internal combustion engine oil formula lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/08C10M133/12C10M135/24C10N30/10
Inventor 张辉李新华段庆华李华杨永璧
Owner CHINA PETROLEUM & CHEM CORP
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