Lubricating oil oxidation stability additive composition and preparation method thereof

A technology of oxidation stability and composition, which is applied in the direction of lubricating composition, additives, petroleum industry, etc., can solve the problems such as unsatisfactory oxidation stability, achieve the effect of improving oxidation stability, excellent effect, and simple preparation method

Active Publication Date: 2009-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strict restrictions on the phosphorus content in high-quality engine lubricating oils, the use of ZDDP alone cannot meet the requirements of oxidation stability, so the development of highly efficient non-phosphorus antioxidants has become a new hot spot

Method used

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  • Lubricating oil oxidation stability additive composition and preparation method thereof
  • Lubricating oil oxidation stability additive composition and preparation method thereof
  • Lubricating oil oxidation stability additive composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0029] Examples 1-6 The additive composition of the present invention was prepared and its main properties were measured accordingly. Add alkyl diphenylamine (component I) and ester-type shielding phenol (component II) into the blending container in different proportions, heat and stir under normal pressure, the blending conditions and the properties of the obtained product are shown in Table 1.

[0030] Among them, T534 is an alkyl diphenylamine antioxidant product produced by Beijing Sanlian Fine Chemical Co., Ltd.; L57 is produced by CIBA Fine Chemical. Both T534 and L57 are mixtures of two alkyl diphenylamines represented by the following formula:

[0031]

[0032] where R 1 , R 2 and R 3 independently selected from C 4 or C 8 of alkyl.

[0033] LZ5150A is produced by LUBRIZOL.CO, and its structure is shown in the following formula:

[0034]

[0035] where R 1 , R 2 for the same C 9 branched chain alkyl.

[0036] T512 is an ester-type shielded phenol antio...

Embodiment 7

[0042] The rotary oxygen bomb test is a common method for rapid screening and determination of the oxidation stability of engine oils and industrial lubricating oils. In this example, the rotating oxygen bomb test ASTM D2272 method is used to evaluate the anti-oxidation effect of lubricating oil. The test instrument consists of a pressure bomb and an oil bath, the pressure bomb rotates 30° with the horizontal plane, and the oil bath has a constant temperature of 150°C. Put 50 grams of test oil, 5 grams of water and copper ring catalyst into the glass together, oxygenate 620kPa (90psi) at room temperature, put the oxygen bomb into the oil bath, the oxygen pressure rises rapidly and remains constant, and the oxygen pressure drops to 175kPa (25psi) time, as the oil sample oxidation induction period. The oil used in the test was 150SN base oil produced by PetroChina Dalian Petrochemical Company. The results are shown in Table 2.

[0043] Table 2

[0044]

[0045] As ...

Embodiment 8

[0047] The Procedure IIIE test method is an engine test method for evaluating the resistance of internal combustion engine oils to high-temperature oxidation, high-temperature sludge and varnish formation tendency, and anti-wear properties. This method is one of several test methods for evaluating the performance of SG, SH, SJ, GF-1, GF-2 gasoline engine oils.

[0048]This embodiment is a high-temperature oxidation test of program III E engine evaluation SH grade gasoline engine oil. The engine is a Buick 3.8L V-6; the 10W / 40 SH grade gasoline engine oil developed by the Academy of Petrochemical Sciences is used; the test oil temperature is 149°C; the total dosage is 10.8% by weight; the phosphorus content is 0.12% by weight, and the formula is implemented using the present invention The additive composition in Example 3 was used in an amount of 0.8% by weight. The test runs continuously for 64 hours under the test conditions specified in the method, and oil samples are colle...

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Abstract

The invention discloses a lubricating oil additive composite with oxidation stability and it comprises alkyl diphenylamine and ester shielding phenol.

Description

technical field [0001] The invention relates to a lubricating oil additive composition, more specifically, to a lubricating oil oxidation stability additive composition composed of two types of compounds. Background technique [0002] In recent decades, the impact of vehicle exhaust emissions on the environment and its solutions have been the focus of research. Existing options include the use of unleaded gasoline, oxygenated fuels, and the use of catalytic converters. At present, gasoline-fueled vehicles are generally equipped with catalytic converters, whose function is to convert the exhaust gas produced by the combustion or partial combustion of hydrocarbons into carbon dioxide and water through the catalyst therein. One problem with using catalytic converters is that the catalyst can become poisoned and thus reduce the effectiveness of the catalytic conversion. Therefore, if the on-board catalytic converter is used for a long time and is not replaced in time, after th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M133/12
Inventor 李新华杨永璧张辉
Owner CHINA PETROLEUM & CHEM CORP
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