Biodegradable lubricating grease and preparation method thereof

A biodegradable and lubricating grease technology, which is applied in the preparation of organic compounds, carboxylate salts, lubricating compositions, etc., can solve the problems of non-biodegradable, refractory biodegradable, and environmental pollution of lubricating greases, and achieve good lubricating effect, Increased degradation rate, good thermal stability

Inactive Publication Date: 2021-04-16
BEIJING MUNICIPAL CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The lubricating grease for the main bearing of the shield machine is responsible for extreme pressure resistance, anti-wear, anti-oxidation, anti-corrosion, and high and low temperature lubrication needs during the operation of the main bearing. At present, more than 90% of the main bearing grease used in the domestic market is mineral oil Grease is difficult to biodegrade and even has certain toxicity. If it flows into the environment, it will inevitably cause environmental pollution
[0004] In view of the related technologies mentioned above, the inventor believes that the lubricating grease used for the main bearing of the shield machine is not biodegradable, and it is easy to cause pollution to the environment

Method used

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  • Biodegradable lubricating grease and preparation method thereof
  • Biodegradable lubricating grease and preparation method thereof
  • Biodegradable lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0038] Preparation Example 1: Put 50g of oleic acid in a dry three-necked flask, heat it to 60°C to melt it, add 45mL of thionyl chloride while stirring, stir for 3.5h, let stand to separate layers, take the supernatant, and Distill under reduced pressure at ℃, the vacuum degree is 0.085MPa, collect the fraction at 120 ℃ to obtain oleic acid chloride liquid, seal it for later use; put 1.2mmol oleic acid chloride solution in 2mL acetone, add 1mmoL serine, 1mL water and 0.1mL triethyl Amine, nitrogen protection, stirring at room temperature for 4 hours, distilling off acetone and triethylamine under reduced pressure, adjusting the pH to 2 with 1moL / L hydrochloric acid, filtering, washing, and recrystallization from a mixture of water and ethanol to obtain N-oleic acid acylserine.

preparation example 1-8

[0040] The sodium alginate in Preparation Example 1-8 was selected from Sichuan Litian Industrial Co., Ltd., the product number is 3550; Bacillus subtilis M4 was selected from the Microbiology Laboratory of the Enzyme Engineering Institute of Shaanxi Academy of Sciences; the cactus powder was selected from Xi’an Yatu Biotechnology Co., Ltd., the model is YT-XRZTQW; the glucose is from Suzhou Demanli Chemical Technology Co., Ltd., the model is ML107; the urea is from Langfang Qianyao Technology Co., Ltd., the product number is 0125.

[0041] Preparation Example 1: (1) Mix 1 kg of sodium alginate, 0.6 kg of avocado seed powder and 0.3 kg of cactus powder, add 0.05 kg of N-oleic acid acylserine and 0.1 kg of 5% Bacillus subtilis M4 solution, and mix well , frozen at -10°C for 16 hours, thawed at room temperature, then frozen at 10°C for 16 hours, thawed at room temperature, placed in 5kg of sodium sulfate solution for 15h, taken out and soaked in 5kg of sterile water for 20h, the ...

preparation example 2

[0043] Preparation example 2: (1) Mix 1.5kg sodium alginate, 0.7kg avocado stone powder and 0.4kg cactus powder, add 0.25kg N-oleic acid acylserine and 0.3kg concentration of 5% Bacillus subtilis M4 solution, mix well Finally, freeze at -10°C for 18 hours, thaw at room temperature, then freeze at 10°C for 18 hours, thaw at room temperature, place in 5kg of sodium sulfate solution for 15h, take it out and soak in 5kg of sterile water for 22h, avocado stone powder is made from avocado stone Prepared by crushing, drying, and passing through a 200-mesh sieve, N-oleic acid acyl serine is selected from Preparation Example 1 of N-oleic acid acyl serine;

[0044] (2) 10 kg of mineral oil, 2 kg of glucose and 1 kg of urea were mixed with the result of step (1), and stirred at 29° C. at a speed of 170 r / min for 45 min to obtain pretreated mineral oil.

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Abstract

The invention relates to the technical field of lubricating grease, and particularly discloses biodegradable lubricating grease and a preparation method thereof. The biodegradable lubricating grease is prepared from the following raw materials in parts by weight: 90 to 95 parts of base oil, 7.5 to 8 parts of 12-hydroxystearic acid, 0.3 to 0.8 part of lithium hydroxide, 0.01 to 0.03 part of an antirust agent and 0.01 to 0.02 part of aluminum disulfide, wherein the base oil comprises mineral oil and vegetable oil in a mass ratio of 2-3:7-8. The preparation method comprises the following steps: S1, mixing the vegetable oil and the mineral oil, heating the mixture to 150-180 DEG C, and stirring the mixture for 40-50 minutes to form base oil; and S2, cooling the base oil to 60-80 DEG C, adding 12-hydroxystearic acid, lithium hydroxide, an antirust agent and aluminum disulfide, mixing the components for 30-60 minutes, and cooling the lubricating grease to normal temperature. The biodegradable lubricating grease has the advantages of being biodegradable, high in degradation rate and heat resistance and good in thermal oxidation stability.

Description

technical field [0001] The application relates to the technical field of lubricating materials, more specifically, it relates to a biodegradable lubricating grease and a preparation method thereof. Background technique [0002] The shield tunneling machine is a construction tool that can support the pressure of the subsurface soil layer and effectively ensure the normal excavation. Currently, it plays a pivotal role in tunnel construction at home and abroad. In the shield machine equipment, the life of the main bearing determines the construction life of the shield machine and the labor intensity of the engineering construction. Therefore, from the perspective of design and maintenance, it is necessary to do the necessary safety protection for the main bearing. [0003] The lubricating grease for the main bearing of the shield machine is responsible for extreme pressure resistance, anti-wear, anti-oxidation, anti-corrosion, and high and low temperature lubrication needs duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M161/00C10M159/00C10M177/00C07C51/60C07C57/66C07C231/02C07C233/49C10N50/10C10N40/02C10N30/06C10N30/08C10N30/10
Inventor 郭飞孔恒姜瑜李会张丽丽李维信田治州任彬鲁赟郝亮鲍逸玮徐熹伟杨蓁佳
Owner BEIJING MUNICIPAL CONSTR
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