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A kind of lithium complex grease and preparation method thereof

A complex lithium-based, grease technology, applied in the field of grease, can solve the problems of polluted land, rivers and lakes, rare, poor biodegradability, etc.

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the acute toxicity of lubricating grease to organisms is very small, the lubricating grease that enters the environment has poor biodegradability and seriously pollutes land, rivers and lakes. At the same time, lubricating grease is not easy to recycle like lubricating oil. Grease has become a breakthrough to solve ecological and environmental problems
[0003] In recent years, the impact of discarded and leaked grease on the environment has attracted widespread attention. In order to solve this problem, biodegradable vegetable oil and ester synthetic oil are mainly used to prepare grease, or vegetable oil and ester oil are used and polyalpha-olefin mixed oil as base oil to prepare lubricating grease, such as the biodegradable lubricating grease reported by CN 1504552A and CN 103265999A; the lubricating grease with mineral oil or polyalpha-olefin as the main base oil component with degradability is still rare

Method used

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  • A kind of lithium complex grease and preparation method thereof
  • A kind of lithium complex grease and preparation method thereof
  • A kind of lithium complex grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Synthesis of O-dimethyloxyphosphoryl-N-3,5-bis(tert-butyl)-4-hydroxyphenylpropionyl-L-serine

[0057] (1) L-serine (represented by formula II-a) (100 mmol, 10.5 g), 40 mL of water was added to the reactor in turn, the temperature was lowered to 0°C, the pH was adjusted to 9.0 with sodium hydroxide, and dimethyl phosphite was added. Ester (represented by formula III-a) (130 mmol, 14.3 g) and tetrabutylammonium bromide (1 mmol, 0.32 g) were added dropwise 50 mL of 12% sodium hypochlorite solution with stirring. After 4 hours of reaction, it was extracted twice with ether, the aqueous layer was adjusted to pH=3 with hydrochloric acid, 8 g of sodium chloride was added, extracted twice with ethyl acetate, the organic phases were combined, dried with anhydrous magnesium chloride, and the solvent was distilled off under reduced pressure to obtain no residue color oil. The colorless oil was dissolved in 60 mL of acetonitrile, sonicated at room temperature for 5 hours, and filt...

Embodiment 2

[0064] Synthesis of O-diisopropyloxyphosphoryl-N-3,5-bis(tert-butyl)-4-hydroxyphenylpropionyl-L-serine

[0065] (1) L-serine (represented by formula II-a) (100 mmol, 10.5 g), 40 mL of water was added to the reactor in turn, the temperature was lowered to 0 °C, the pH was adjusted to 9.0 with sodium hydroxide, and diisophosphite was added. Propyl ester (represented by formula III-b) (130 mmol, 21.7 g) and tetrabutylammonium bromide (1 mmol, 0.32 g) were added dropwise 50 mL of 12% sodium hypochlorite solution with stirring. After 4 hours of reaction, it was extracted twice with ether, the aqueous layer was adjusted to pH=3 with hydrochloric acid, 8 g of sodium chloride was added, extracted twice with ethyl acetate, the organic phases were combined, dried with anhydrous magnesium chloride, and the solvent was distilled off under reduced pressure to obtain no residue color oil. The colorless oil was dissolved in 60 mL of acetonitrile, sonicated at room temperature for 5 hours, a...

Embodiment 3

[0072] Synthesis of O-diphenylmethyl oxyphosphoryl-N-3,5-bis(tert-butyl)-4-hydroxyphenylpropionyl-L-serine

[0073] (1) L-serine (represented by formula II-a) (100 mmol, 10.5 g), 40 mL of water was added to the reactor in turn, the temperature was lowered to 0°C, the pH was adjusted to 9.0 with sodium hydroxide, and dibenzyl phosphite was added. Esters (represented by formula III-c) (130 mmol, 34.0 g) and tetrabutylammonium bromide (1 mmol, 0.32 g) were added dropwise with stirring 50 mL of 12% sodium hypochlorite solution. After 4 hours of reaction, it was extracted twice with ether, the aqueous layer was adjusted to pH=3 with hydrochloric acid, 8 g of sodium chloride was added, extracted twice with ethyl acetate, the organic phases were combined, dried with anhydrous magnesium chloride, and the solvent was distilled off under reduced pressure to obtain no residue color oil. The colorless oil was dissolved in 60 mL of acetonitrile, sonicated at room temperature for 5 hours, ...

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Abstract

The invention provides a composite lithium base grease and a preparation method thereof. The lithium complex grease of the present invention comprises the following components: (a) an additive; (b) a lithium complex thickener; (c) a lubricating base oil; wherein the additive is a phosphorus-containing compound, a rust inhibitor and an oily agent The structure of the phosphorus-containing compound is: the definition of each group is shown in the specification. The complex lithium-based grease of the present invention has excellent biodegradability, and while ensuring environmental friendliness, it has good colloidal stability, excellent mechanical stability and excellent anti-oxidation performance. The complex lithium-based grease of the present invention can be used for harsh working conditions such as high temperature, high speed, high load, and much water.

Description

technical field [0001] The invention relates to a lubricating grease, in particular to a complex lithium-based lubricating grease with biodegradable properties. Background technique [0002] Grease is a necessary working medium in the normal operation of mechanical equipment and material manufacturing and processing. With the rapid development of the industry, the demand for grease is also increasing. During the storage, transportation and use of grease, various environmental pollution situations such as leakage, overflow and improper discharge are inevitable. Although the acute toxicity of lubricating grease to organisms is small, the lubricating grease entering the environment seriously pollutes land, rivers and lakes due to its poor biodegradability. At the same time, lubricating grease is not as easy to recycle as lubricating oil. Grease has become a breakthrough to solve ecological problems. [0003] In recent years, the impact of discarded and leaked grease on the en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M137/04C07F9/09C07F9/11C10N50/10C10N30/10C10N30/08C10N30/12
CPCC10M169/04C10M137/04C07F9/094C07F9/11C10M2205/0206C10M2207/1285C10M2207/1276C10M2207/16C10M2215/223Y02W30/74
Inventor 庄敏阳郑会刘显秋刘欣阳刘中其刘伟姜靓孙洪伟何懿峰
Owner CHINA PETROLEUM & CHEM CORP