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Novel lubricating oil dispersant and preparation method and application

A lubricating oil dispersant and a new type of technology, applied in lubricating compositions, additives, petroleum industry and other directions, can solve the problems of mechanical parts damage, lubricating oil performance decline, oil circuit blockage, etc., to extend service life, maintain cleanliness, The effect of prolonging the oil change interval

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the working process of the engine, soot will enter the lubricating oil system, resulting in a decrease in the performance of the lubricating oil, blockage of the oil circuit, and even damage to mechanical parts

Method used

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  • Novel lubricating oil dispersant and preparation method and application
  • Novel lubricating oil dispersant and preparation method and application
  • Novel lubricating oil dispersant and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Lubricating oil dispersant is prepared by acylation reaction between polyisobutylene succinic anhydride and PAMAM dendrimer (G2), that is, polyisobutylene succinic anhydride is connected to the end of PAMAM dendrimer through an amide bond; the number average molecular weight of polyisobutylene succinic anhydride for 1350.

[0038] The present embodiment also provides the preparation method of above-mentioned lubricating oil dispersant, comprising:

[0039] (1) Add 100mL of toluene, 1g of polyisobutylene succinic anhydride and 1mL of pyridine into a 300ml three-neck flask, sonicate for half an hour, and add 7.7g of PAMAM dendrimer (G2) DMF solution dropwise at a temperature below 10°C (the mass of PAMAM dendrimer and DMF ratio is 1:11), at N 2 Under protection, the temperature rose to 110°C, and after 6 hours of reaction, the reaction was stopped to obtain the initial product of the reaction.

[0040] (2) After the initial reaction product was distilled under reduced p...

Embodiment 2

[0042] Lubricating oil dispersant is prepared by acylation reaction between polyisobutylene succinic anhydride and PAMAM dendrimer (G3), that is, polyisobutylene succinic anhydride is linked at the end of PAMAM dendrimer through an amide bond; the number average molecular weight of polyisobutylene succinic anhydride for 1080p.

[0043]This example also provides the preparation method of the above-mentioned lubricating oil dispersant, including: adding 200mL DMF and 2g polyisobutylene succinic acid into a 500ml three-necked bottle, sealing it well, ultrasonicating for half an hour, controlling the temperature below 10°C and adding 1-hydroxy Benzotriazole (2.1 g) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.42 g) in DMF, and 12 g of PAMAM dendrimer (G3) in methanol (PAMAM dendrimer The mass ratio of methanol to methanol is 1:10), nitrogen protection after dripping, magnetic stirring at room temperature for 24 hours, transfer to a single-necked bottle and ro...

Embodiment 3

[0046] The lubricating oil dispersant is prepared by the acylation reaction between polyisobutylene succinic anhydride and PAMAM dendrimer (G5), that is, polyisobutylene succinic anhydride is linked to the end of PAMAM dendrimer through an amide bond; the number average molecular weight of polyisobutylene succinic anhydride for 950.

[0047] This example also provides the preparation method of the above lubricating oil dispersant, including: (1) Add 100mL of toluene, 1g of polyisobutylene succinic anhydride and 1mL of pyridine into a 300ml three-necked bottle, ultrasonicate for half an hour, and add dropwise at a temperature controlled below 10°C 5.5g PAMAM (G5) DMF solution (the mass ratio of PAMAM dendrimer and DMF is 1:11), in N 2 Under protection, the temperature was raised to 100°C, and after 6 hours of reaction, the reaction was stopped to obtain the initial product of the reaction.

[0048] (2) Distill the initial reaction product under reduced pressure (evaporate the ...

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Abstract

The invention provides a novel lubricating oil dispersing agent as well as a preparation method and application thereof. The structure of the novel lubricating oil dispersing agent is as shown in thefollowing formula: gamma-PAMAM dendrimer, wherein gamma represents a polyisobutylene succinic acid structure, and PAMAM dendrimer represents a polyamide-amine dendrimer; and the gamma is connected with the PAMAM dendrimer through amido bonds. The novel lubricating oil dispersing agent is simple in preparation process condition and mild in reaction condition, and has no special requirements on chemical equipment. The novel dispersing agent contains straight-chain alkane and has excellent oil solubility and good dispersing performance; the compound contains a large amount of secondary amine andtertiary amine, so that the base number of lubricating oil (or lubricating ester) can be increased.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, in particular to a novel lubricating oil dispersant and its preparation method and application. Background technique [0002] During the working process of the engine, soot will enter the lubricating oil system, causing the performance of the lubricating oil to decrease, the oil circuit to be blocked, and even the mechanical parts to be damaged. Prevent soot particles in lubricating oils by adding dispersants to industrial lubricating oils. The lubricating oil can suspend or suspend insoluble substances such as jelly and carbon deposits generated after oxidation in the oil, forming a stable colloidal state and not easy to deposit on the parts; or the jelly and deposits that have been deposited on the engine parts Charcoal, etc., are washed down by lubricating oil washing. [0003] Detergent and dispersant is a surface-active substance that can absorb solid particle pollutants in the oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C10M149/00C10N30/04C10N40/10
CPCC08G81/028C10M149/00C10M2217/06
Inventor 鄂红军李万英杜雪岭雷凌徐夏歌金佳佳
Owner CHINA PETROLEUM & CHEM CORP