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Diesel engine lubricating oil composition and preparation method thereof

A technology of lubricating oil composition and lubricating oil base oil, which is applied in the direction of lubricating composition and petroleum industry, and can solve problems such as vehicle burning, diesel engine soot load increase, and unqualified lubricating oil performance

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past 20 years, in order to avoid catastrophic accidents caused by vehicle start failure in winter, low temperature pumpability has always been an important indicator of engine oil, but initially it was only for new oil
Due to the continuous improvement of the engine, the anti-oxidation load of oil products has increased, and the soot load of diesel engine oil has continued to increase, resulting in the unqualified low-temperature pumping performance of the lubricating oil in the later stage of the actual service period, causing accidents such as burning of the vehicle

Method used

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  • Diesel engine lubricating oil composition and preparation method thereof
  • Diesel engine lubricating oil composition and preparation method thereof
  • Diesel engine lubricating oil composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0096] The present invention will be described in further detail below using examples, but the present invention is not limited to these examples.

[0097] In the following examples and comparative examples, the respective content of copolymer and diluent oil and the content of each monomer in the copolymer are calculated according to the charging amount.

[0098] In the context of the present invention, including in the following Examples and Comparative Examples, each measurement method and calculation method were performed as follows.

[0099] 1. Gel permeation chromatography (GPC) resolution method

[0100] Operating instrument: Model 1515 gel permeation chromatography produced by Waters Corporation of the United States. The detector is a Waters2414 differential refractive index detector. The used solvent of configuring standard product is the chromatographically pure tetrahydrofuran produced by Acros Company. The chromatographic column is provided by Waters Company, wh...

Embodiment A

[0133] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 270kg of the first monomer (decyl methacrylate ester / lauryl methacrylate / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate mixture, where C 10 = 61%, C 12 = 20%, C 14 = 12%, C 16 = 5%, C 18 =2%, X=11.1), the mixture A of 1.35kg benzoyl peroxide and 1.08kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 150kg (tetradecyl methacrylate ester / cetyl methacrylate / octadecyl methacrylate / eicosyl methacrylate mixture, where C 14= 27% by weight, C 16 = 42%, C 18 = 24%, C 20 =7% by weight, X=16.0), the mixture B of 0.75kg benzoyl peroxide and 0.6kg dodecyl mercaptan is added dropwise in the reactor. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A to the dr...

Embodiment B

[0137] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 50kg of the first monomer (methacrylic acid hexyl ester / octyl methacrylate / decyl methacrylate mixture, where C 6 =71%, C 8 = 21%, C 10 =8%, X=6.6), the mixture A of 0.32kg benzoyl peroxide and 0.21kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 370kg (dodecyl methacrylate ester / myristyl methacrylate / cetyl methacrylate mixture where C 12 = 55% by weight, C 14 = 17% by weight, C 16 =28% by weight, X=13.3), the mixture B of 1.8kg benzoyl peroxide and 1.5kg dodecylmercaptan was added dropwise in the reactor. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A and the dropping amount (kg / hour) of mixture B is 7:1, and the sum of the two is 12kg / hour, then A / B gradually dec...

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Abstract

The invention provides a diesel engine lubricating oil composition and a preparation method thereof. The diesel engine lubricating oil composition of the present invention comprises gradient copolymer, viscosity index improver, dispersant, detergent, zinc dialkyldithiophosphate, antioxidant and lubricating oil base oil. The diesel engine lubricating oil composition of the invention has very excellent low-temperature performance and anti-oxidation performance, and can meet the requirements of CI-4 and above high-grade diesel engine lubricating oil.

Description

technical field [0001] The present invention relates to a lubricating oil composition, in particular to a diesel engine lubricating oil composition. Background technique [0002] The requirements of environmental protection and energy saving have promoted the development of engine technology, and also promoted the continuous upgrading of diesel engine oil. The performance requirements of oil products in soot dispersion, anti-oxidation, anti-wear, high temperature cleaning and low temperature are also getting higher and higher. . [0003] In the past 20 years, in order to avoid catastrophic accidents caused by vehicle start failure in winter, low temperature pumpability has always been an important indicator of engine oil, but initially it was only for new oil. Due to the continuous improvement of the engine, the anti-oxidation load of oil products has increased, and the soot load of diesel engine oil has continued to increase, resulting in the unqualified low-temperature pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M145/12C10M145/14C10M145/16C10M169/04C08F220/18C10N30/06C10N30/08C10N30/10C10N40/25
CPCC10M145/12C10M145/14C10M145/16C10M169/048C08F220/18C10M2227/00C10M2203/1025C10M2205/024C10M2205/022C10M2215/086C10M2215/064C10M2219/068C10M2219/087C08F220/1806C08F220/1811C08F220/1808C10N2030/06C10N2030/08C10N2030/10C10N2040/252C08F220/1812C08F220/1818C10N2010/04
Inventor 徐杰张耀段庆华武志强张倩刘依农夏青虹张峰
Owner CHINA PETROLEUM & CHEM CORP
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