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Thiadiazole lubricating oil anti-wear additive and preparation method thereof

A lubricating oil additive, lubricating oil technology, applied in the directions of additives, lubricating compositions, petroleum industry, etc., can solve the problems of difficult and widely used, poor oil solubility, etc. Effect

Active Publication Date: 2022-05-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, dimercaptothiadiazole dimer compounds are used as lubricating additives. Due to their poor oil solubility, dimercaptothiadiazole dimer lubricating additives are widely used in industrial and mechanical greases. , It is difficult to effectively and widely use in mechanical lubricating oil

Method used

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  • Thiadiazole lubricating oil anti-wear additive and preparation method thereof
  • Thiadiazole lubricating oil anti-wear additive and preparation method thereof
  • Thiadiazole lubricating oil anti-wear additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 0.3 mol of 5-methyl-2-mercaptothiadiazole to the three-necked flask, then add 0.3 mol of sodium hydroxide and 100 mL of distilled water to the system, slowly raise the temperature to 70°C, and maintain the temperature and stir for 1 hour; After all the solids in the system are dissolved, add 0.1 mol of 2,2,2-trichloroethanol, maintain the temperature and stir the reaction for 4 hours; after stopping the reaction, wash the reaction solution with hot water to remove water-soluble impurities, and extract it with dichloromethane. The organic layer was collected, and the solvent was distilled off under reduced pressure to obtain a light yellow solid product, which was the target product of the additive.

[0016] The target product was identified as 2,2,2-tris((5-methyl-1,3,4-thiadiazol-2-yl)thio)ethanol by H NMR spectrum. figure 1 .

Embodiment 2

[0018] Add 0.15 mol of 5-methyl-2-mercaptothiadiazole to the three-necked flask, then add 0.15 mol of sodium hydroxide and 50 mL of distilled water to the system, slowly raise the temperature to 70°C, and maintain the temperature and stir for 0.5 hours; After all the solids in the system are dissolved, add 0.05mol of 2,2,2-trichloroethanol, keep the temperature and stir the reaction for 3 hours; after stopping the reaction, wash the reaction liquid with hot water to remove water-soluble impurities, extract with dichloromethane, The organic layer was collected, and the solvent was distilled off under reduced pressure to obtain a light yellow solid product, which was the target product of the additive.

[0019] The target product was identified as 2,2,2-tris((5-methyl-1,3,4-thiadiazol-2-yl)thio)ethanol by H NMR spectroscopy.

Embodiment 3

[0021] Add 0.06 mol of 5-methyl-2-mercaptothiadiazole to the three-necked flask, then add 0.06 mol of sodium hydroxide and 20 mL of distilled water to the system, slowly raise the temperature to 65°C, and maintain the temperature and stir for 0.5 hours; After all the solids in the system are dissolved, add 0.02mol of 2,2,2-trichloroethanol, keep the temperature and stir the reaction for 3 hours; after stopping the reaction, wash the reaction liquid with hot water to remove water-soluble impurities, extract with dichloromethane, The organic layer was collected, and the solvent was distilled off under reduced pressure to obtain a light yellow solid product, which was the target product of the additive.

[0022] The target product was identified as 2,2,2-tris((5-methyl-1,3,4-thiadiazol-2-yl)thio)ethanol by H NMR spectroscopy.

[0023] Tribological performance evaluation

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Abstract

The invention belongs to the technical field of lubricating oil additives, and particularly relates to a 2, 2, 2-tri ((5-methyl-1, 3, 4-thiadiazole-2-yl) thio) ethanol lubricating oil anti-wear additive, the structure of which is as shown in formula (1). The anti-wear additive for the lubricating oil, disclosed by the invention, is obtained by reacting 5-methyl-2-mercaptothiadiazole with 2, 2, 2-trichloroethanol; when the lubricating oil additive is added into PEG lubricating oil, the extreme pressure anti-wear performance of the PEG lubricating oil can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil additives, in particular to a kind of 2,2,2-tris((5-methyl-1,3,4-thiadiazol-2-yl)thio)ethanol as lubricating oil anti-wear Preparation and use of additives. Background technique [0002] Dimercaptothiadiazole can generate dimers, trimers, etc. through the coupling of sulfhydryl groups. Dimercaptothiadiazole dimer is not only an important chemical intermediate, but also has the general properties of thiadiazole derivatives - complexation and passivation of metals, and also exhibits extremely strong extreme pressure and anti-wear properties And synergistic anti-oxidation performance; can be used as extreme pressure anti-wear agent for various industrial and mechanical greases, etc., and can also be used as anti-wear agent, especially under heavy load conditions. [0003] At present, dimercaptothiadiazole dimer compounds are used as lubricating additives. Due to their poor oil solubility, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M135/36C10M169/04C07D285/125C10N30/06
CPCC10M135/36C10M169/04C07D285/125C10N2030/06C10M2209/1045C10M2219/106
Inventor 董均阳李维民王晓波
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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