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Composite lithium-based lubricating grease and preparation method thereof

A technology of complex lithium base and base grease, which is applied in lubricating compositions, petroleum industry and other directions, can solve the problems of poor corrosion resistance, poor water resistance, complicated preparation process and operation, and achieves improved water resistance, strong water resistance, and the preparation process simple effect

Active Publication Date: 2018-11-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a lithium composite grease and a preparation method thereof, which can effectively solve the problem of complex operation in the preparation process, and the prepared lithium composite grease can effectively solve the existing The problem of poor water resistance and poor corrosion resistance in lubricating grease

Method used

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  • Composite lithium-based lubricating grease and preparation method thereof
  • Composite lithium-based lubricating grease and preparation method thereof
  • Composite lithium-based lubricating grease and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A lithium complex grease comprises the following components in parts by weight: 70 parts of vegetable oil, 4.5 parts of lauryl hydroxystearic acid, 0.8 parts of sebacic acid and 0.3 parts of LiOH aqueous solution.

[0030] Wherein, LiOH aqueous solution is made by mixing LiOH and water according to the weight ratio of 1:3.

[0031] The preparation method of above-mentioned composite lithium grease, comprises the following steps:

[0032] (1) First heat 42 parts by weight of vegetable oil to 75°C, then add lauryl hydroxystearic acid, continue to heat up to 120°C, then add sebacic acid and stir until completely dissolved, then cool down to 95°C;

[0033] (2) LiOH aqueous solution was added dropwise to the resultant of step (1), and the addition was completed within 30 minutes, then the temperature was raised to 110° C., and the temperature was kept for 1 hour;

[0034] (3) Add the remaining vegetable oil to the resultant of step (2), then raise the temperature to 200°C, ...

Embodiment 2

[0036] A lithium complex grease comprises the following components in parts by weight: 90 parts of mineral oil, 30.7 parts of decahydroxystearic acid, 9.4 parts of phthalic acid and 4.8 parts of LiOH aqueous solution.

[0037] Wherein, LiOH aqueous solution is made by mixing LiOH and water according to the weight ratio of 1:3.

[0038] The preparation method of above-mentioned composite lithium grease, comprises the following steps:

[0039] (1) First, 54 parts by weight of mineral oil are heated to 85°C, then decahydroxystearic acid is added, the temperature is continued to rise to 130°C, then phthalic acid is added and stirred until completely dissolved, and then the temperature is lowered to 105°C;

[0040] (2) LiOH aqueous solution was added dropwise to the resultant of step (1), and the addition was completed within 35 minutes, then the temperature was raised to 120° C., and the temperature was kept for 1 hour;

[0041] (3) Add the remaining mineral oil to the resultant ...

Embodiment 3

[0043] A lithium complex grease comprises the following components in parts by weight: 84 parts of synthetic oil, 5.2 parts of lauryl hydroxystearic acid, 3.6 parts of adipic acid and 0.8 parts of LiOH aqueous solution.

[0044] Wherein, LiOH aqueous solution is made by mixing LiOH and water according to the weight ratio of 1:3.

[0045] The preparation method of above-mentioned composite lithium grease, comprises the following steps:

[0046] (1) First heat 51 parts by weight of synthetic oil to 80°C, then add lauryl hydroxystearic acid, continue to heat up to 125°C, then add adipic acid and stir until completely dissolved, then cool down to 100°C;

[0047] (2) LiOH aqueous solution was added dropwise to the resultant of step (1), and the addition was completed within 40 minutes, then the temperature was raised to 115° C., and the temperature was kept for 1 hour;

[0048] (3) Add the remaining synthetic oil to the product of step (2), then raise the temperature to 205°C, kee...

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Abstract

The invention provides composite lithium-based lubricating grease. The lubricating grease is prepared from 70-90 parts of base oil, 4.5-30.7 parts of stearic acid, 0.8-9.4 parts of binary acid and 0.3-4.8 parts of a LiOH aqueous solution. The composite lithium-based lubricating grease is prepared by carrying out the processes of saponification, saponification dehydration, high-temperature refining, cooling, homogenizing and the like. The invention further discloses a preparation method. The preparation method can effectively solve the problem of complex operation in the preparation process, and the prepared composite lithium-based lubricating grease can effectively solve the problems that existing lubricating grease is poor in water resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease preparation, and in particular relates to a lithium composite lubricating grease and a preparation method thereof. Background technique [0002] Grease is a relatively stable semi-solid product formed by dispersing thickeners into liquid lubricants. Generally, some additives need to be added to improve some of its specific performance. Due to the extremely complex operating conditions and working environment of various mechanical equipment, the performance requirements for grease are also different. With the continuous update and development of grease manufacturing technology, it also promotes the rapid increase of grease varieties. [0003] Soap-based greases at home and abroad have transitioned from the development of single-soap-based greases to the development of compound greases. Lithium-complex greases are greases thickened with mineral oil or synthetic oils made of lithium-compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/02C10M177/00C10N50/10C10N30/12
CPCC10M169/02C10M177/00C10M2203/1006C10M2207/1236C10M2207/1276C10M2207/1285C10M2207/1426C10M2207/401C10N2030/12C10N2030/26C10N2050/10C10N2010/02
Inventor 樊小强任冠霖李文李浩朱旻昊
Owner SOUTHWEST JIAOTONG UNIV
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