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Method for modifying lubricating oil additive by using thioacetic acid

A technology of lubricating oil additive and thioacetic acid, applied in the directions of additives, lubricating compositions, petroleum industry, etc., can solve the problems of poor oxidation stability, restrict the use of polyisobutylene, etc. Effect

Inactive Publication Date: 2015-02-04
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyisobutylene contains unsaturated bonds in the molecule, and its oxidation stability is poor, which limits the use of polyisobutylene as a lubricant base oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Mix 150g of refined epoxy polyisobutylene mixed ester with 5.625g of thioacetic acid with a concentration of 95%, heat up to 110°C under stirring, and react for 5 hours to obtain a mixed solution, in which epoxy polyisobutylene and The mass ratio of mixed fatty acids is 1:0.0375;

[0020] b. Evaporate unreacted thioacetic acid from the obtained mixed solution under reduced pressure to obtain a lubricating oil additive of a light yellow transparent oily sulfur-containing epoxy polyisobutylene mixed ester, wherein the acid value is 0.11 and the pour point is -10.

Embodiment 2

[0022] a. Mix 150g of refined epoxy polyisobutylene mixed ester and 7.5g of thioacetic acid with a concentration of 95% evenly, then heat up to 100°C under stirring, and react for 3 hours to obtain a mixed solution, in which epoxy polyisobutylene and mixed The mass ratio of fatty acids is 1:0.05;

[0023] b. Evaporate unreacted thioacetic acid from the obtained mixed solution under reduced pressure to obtain a lubricating oil additive of a light yellow transparent oily sulfur-containing epoxy polyisobutylene mixed ester, wherein the acid value is 0.12 and the pour point is -12.

Embodiment 3

[0025] a. Mix 150g of refined epoxy polyisobutylene mixed ester with 9.375g of thioacetic acid with a concentration of 95%, heat up to 120°C under stirring, and react for 4 hours to obtain a mixed solution, in which epoxy polyisobutylene and The mass ratio of mixed fatty acids is 1:0.0625;

[0026] b. Evaporate unreacted thioacetic acid from the obtained mixed solution under reduced pressure to obtain a lubricating oil additive of a light yellow transparent oily sulfur-containing epoxy polyisobutylene mixed ester, wherein the acid value is 0.13 and the pour point is -15.

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Abstract

The invention relates to a method for modifying a lubricating oil additive by using thioacetic acid. The mixed fatty acid ester of epoxy polyisobutylene is functionally modified to obtain the extreme pressure anti-wear and anti-oxidative lubricating oil additive by using the thioacetic acid, wherein the pour point is lowered from -2 to -5 DEG C before modification to -10 to -20 DEG C after modification. A process is clean, the method is safe in implementation and convenient to operate, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a method for modifying lubricating oil additives with thioacetic acid. Background technique [0002] Polyisobutene is a general term for homopolymers of isobutene (2-methylpropylene), which is a colorless, odorless, non-toxic, high-viscosity liquid olefin. Due to the different ways of chain termination in the homopolymerization reaction, there are many types of double bonds at the end of the polyisobutylene molecule produced by the reaction. According to the different molecular weight, it can be roughly divided into low molecular weight polyisobutene and high molecular weight polyisobutene. Generally speaking, the molecular weight of low molecular weight polyisobutylene is between 350-3500. According to the mole fraction of terminal vinyl groups, it can be divided into high reactive polyisobutylene (HRPIB: Highly Reactive Polyisobutylene) and low reactive polyisobutylene (LRPIB: Lowly Reactive Polyisobutylene). Highly active...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M151/02C10N30/06C10N30/10
Inventor 吾满江·艾力夏木西卡玛尔·买买提
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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