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Lubricating oil viscosity index improver as well as preparation method and application thereof

A viscosity index improvement and viscosity index technology, applied in lubricating compositions, petroleum industry, etc., can solve the problems of poor parallel reproducibility, wide relative molecular mass distribution, uncontrollable molecular mass, etc., and achieve excellent biodegradability, The relative molecular mass is controllable and the cost is low

Active Publication Date: 2020-06-19
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In foreign countries, traditional free radical polymerization of vegetable oil is generally carried out by azobisisobutyronitrile AIBN or benzoyl peroxide BPO initiator, but the copolymer obtained by traditional free radical reaction has uncontrollable molecular weight, wide relative molecular weight distribution and The problem of poor parallel reproducibility

Method used

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  • Lubricating oil viscosity index improver as well as preparation method and application thereof
  • Lubricating oil viscosity index improver as well as preparation method and application thereof
  • Lubricating oil viscosity index improver as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of viscosity index improver for lubricating oil, at room temperature, take 2.7g of styrene, 0.3g of soybean oil, 1.8×10 -5 mol catalyst, 5mL toluene in a dry three-necked round-bottom flask, anhydrous and oxygen-free operation, evacuated for 3 minutes, filled with nitrogen for 6 minutes, repeated twice, placed in a constant temperature oil bath, heated and stirred at 50°C for 30 minutes to obtain Homogeneous solution; inject the toluene solution of azobisisobutyronitrile in a nitrogen atmosphere, wherein the amount of azobisisobutyronitrile is 1% of the total monomer (styrene and soybean oil) quality, which is 0.03g, and it is dissolved In 3mL of toluene, react the reaction system in a constant temperature oil bath at 90°C for 8h; after the reaction, pour the solution in the flask into a beaker filled with 100mL of cold methanol at about 10°C, and filter it out after the solution is clarified. In the supernatant, the precipitate was vacuum-dried at ...

Embodiment 2

[0056] A preparation method of lubricating oil viscosity index improver, at room temperature, take 0.9g of styrene, 2.1g of castor oil, 1.8 × 10 -5 mol catalyst, 5mL toluene in a dry three-necked round-bottom flask, anhydrous and oxygen-free operation, evacuated for 3 minutes, filled with nitrogen for 6 minutes, repeated twice, placed in a constant temperature oil bath, heated and stirred at 50°C for 30 minutes to obtain Homogeneous solution; Then inject the toluene solution of azobisisobutyronitrile in a nitrogen atmosphere, wherein the amount of azobisisobutyronitrile is 0.1% of the total monomer (castor oil, styrene) quality, which is 0.0072g, which Dissolve in 5mL of toluene, and react the reaction system in a constant temperature oil bath at 90°C for 6 hours; after the reaction, pour the solution in the reaction tube into a beaker filled with 100mL of cold methanol at about 10°C, and filter it out after the solution is clarified In the supernatant, the precipitate was vac...

Embodiment 3

[0058] A preparation method of a viscosity index improver for lubricating oil, at room temperature, take 1.8g of styrene, 1.2g of soybean oil, 1.8×10 -5 mol catalyst, 5mL toluene in a dry three-necked round-bottom flask, anhydrous and oxygen-free operation, evacuated for 3 minutes, filled with nitrogen for 6 minutes, repeated twice, placed in a constant temperature oil bath, heated and stirred at 50°C for 30 minutes to obtain Homogeneous solution; inject the toluene solution of azobisisobutyronitrile in a nitrogen atmosphere, wherein the amount of azobisisobutyronitrile is 1% of the total monomer (styrene and soybean oil) quality, which is 0.03g, and it is dissolved In 3mL of toluene, react the reaction system in a constant temperature oil bath at 90°C for 8h; after the reaction, pour the solution in the flask into a beaker filled with 100mL of cold methanol at about 10°C, and filter it out after the solution is clarified. For the supernatant, the precipitate was vacuum-dried ...

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Abstract

The invention discloses a lubricating oil viscosity index improver as well as a preparation method and application thereof, and belongs to the technical field of fine chemical engineering. Firstly, the viscosity index improver disclosed by the invention makes up the disadvantage that the traditional petroleum-based viscosity index improver is non-biodegradable, and is an environment-friendly and green lubricating oil viscosity index improver. Further, the invention also discloses a novel method for synthesizing vegetable oil and styrene copolymer into a viscosity index improver by taking a late transition metal Ni (II) complex as a main catalyst under the reaction conditions of no water and no oxygen. Through the method, the application range of the late transition metal catalyst is expanded, the controllability of the relative molecular mass of the copolymer is improved, and the distribution of the relative molecular mass is narrowed. Finally, the invention further discloses an application of the lubricating oil viscosity index improver, and when the addition amount is 0.1%-0.9% of the mass fraction of the lubricating oil base oil, the viscosity index is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, relates to the technical field of lubricating oil additives, in particular to a lubricating oil viscosity index improver and a preparation method thereof. Background technique [0002] Viscosity Index (Viscosity Index, VI) is an index to measure the degree of change of lubricating oil viscosity with temperature. The higher the VI of the oil, the smaller the degree of viscosity change with temperature. Viscosity index improver (viscosity index improver, referred to as VII) can be used to improve the viscosity-temperature performance of lubricating oil, so as to obtain multi-grade engine oil with good low-temperature start-up performance and maintain proper viscosity at high temperature. [0003] There are four main types of polymer compounds commonly used in lubricating oil viscosity index improvers: polymethacrylate (PMA), polyisobutylene (PIB), ethylene-propylene copolymer (OCP), hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/12C08F212/08C08F236/22C08F222/14C08F4/04C08F4/26C10N30/02
CPCC10M145/12C08F212/08C08F222/1006C08F4/04C08F4/26C10M2209/082C08F236/22
Inventor 丁丽芹梁生荣念利利徐海升李孟阁
Owner XI'AN PETROLEUM UNIVERSITY
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