High-base-number compound-sulfonic lithium/calcium composite lubricating grease and preparation method thereof

A technology of compound lithium sulfonate and lubricating grease, which is applied in the direction of lubricating composition, petroleum industry, thickener, etc., to achieve the effect of good high temperature resistance

Inactive Publication Date: 2014-01-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report that the preparation of this kind of lubricating grease appears.

Method used

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  • High-base-number compound-sulfonic lithium/calcium composite lubricating grease and preparation method thereof
  • High-base-number compound-sulfonic lithium/calcium composite lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] according to figure 1 The flow chart shown in the preparation of high alkali value complex lithium calcium sulfonate complex grease:

[0022] (1) Take 20g of synthetic calcium sulfonate and 38g of paraffin-based mineral oil into an open reaction kettle, stir and mix, heat up to 70°C, add 1.7g of glacial acetic acid, stir and mix evenly, and keep it warm for 60 minutes.

[0023] (2) After the material is thickened, heat up to 90°C, add 1.5g of calcium hydroxide, 1.7g of boric acid, and 5.5g of sebacic acid, stir and mix evenly, and keep warm for 30 minutes.

[0024] (3) Raise the temperature to 100°C, add 0.5g of lithium hydroxide and 7g of 12-hydroxystearic acid, stir and mix evenly, and keep it warm for 50 minutes, then raise the temperature to 200°C for refining, and hold it for 50 minutes.

[0025] (4) Cool down. When the temperature drops below 50°C, it will be ground and homogenized to be a finished product. Its properties are shown in Table 1.

Embodiment 2

[0027] according to figure 1 The flow chart shown in the preparation of high alkali value complex lithium calcium sulfonate complex grease:

[0028] (1) Take 20g of synthetic calcium sulfonate and 30g of paraffin-based mineral oil into the open reaction kettle, stir and mix, raise the temperature to 75°C, add 1.7g of glacial acetic acid, stir and mix evenly, and keep it warm for 70 minutes.

[0029] (2) After the material is thickened, heat up to 95°C, add 1g of calcium hydroxide, 1.7g of boric acid, and 2.8g of sebacic acid, stir and mix evenly, and keep warm for 40 minutes.

[0030] (3) Raise the temperature to 105°C, add 0.8g of lithium hydroxide and 10g of 12-hydroxystearic acid, stir and mix evenly, and keep it warm for 55 minutes, then raise the temperature to 210°C for refining, and hold it for 60 minutes.

[0031] (4) Cool down. When the temperature drops below 50°C, it will be ground and homogenized to be a finished product. Its properties are shown in Table 1.

Embodiment 3

[0033] according to figure 1 The flow chart shown in the preparation of high alkali value complex lithium calcium sulfonate complex grease:

[0034] (1) Take 20g of petroleum calcium sulfonate and 15g of paraffin-based mineral oil into an open reaction kettle, stir and mix, heat up to 80°C, add 1.6g of glacial acetic acid, stir and mix evenly, and keep it warm for 70 minutes.

[0035] (2) After the material is thickened, heat up to 100°C, add 1g of calcium hydroxide, 1.7g of boric acid, and 2.8g of sebacic acid, stir and mix evenly, and keep warm for 50 minutes.

[0036] (3) Raise the temperature to 110°C, add 0.25g of lithium hydroxide and 2.7g of stearic acid, stir and mix evenly, and keep it warm for 70 minutes, then raise the temperature to 220°C for refining, and hold it for 80 minutes.

[0037] (4) Cool down. When the temperature drops below 50°C, it will be ground and homogenized to be a finished product. Its properties are shown in Table 1.

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Abstract

The invention discloses a high-base-number compound-sulfonic lithium / calcium composite lubricating grease and a preparation method thereof, belonging to the technical field of lubricating grease preparation. The preparation method comprises the following steps: adding lubricating base oil and calcium sulfonate into an open reaction kettle, mixing, heating, adding carboxylic acid, keeping the temperature to react until the materials become thickened, adding calcium hydroxide, boric acid, decanedioic acid, lithium hydroxide and C12-C24 fatty acids, keeping the temperature to react, heating, dewatering while keeping the temperature, refining, cooling, grinding and homogenizing to obtain the finished product. The lubricating grease disclosed by the invention has the advantages of excellent high temperature properties, excellent water resistance, excellent adhesion properties, high loading capacity, favorable wear resistance and favorable anti-friction performance, and can satisfy the lubricating requirements under harsh conditions, such as high temperature, high load and the like.

Description

technical field [0001] The invention belongs to the technical field of lubricant preparation for gears and bearings, and in particular relates to a high-basic value composite lithium-calcium sulfonate composite grease and a preparation method thereof. Background technique [0002] Composite calcium sulfonate-based grease is a common high-performance multi-effect grease on the market at present. It has good high temperature resistance, extreme pressure and wear resistance, shear stability, low temperature pumpability, and rust resistance. It has a wide range of application prospects in various harsh working conditions such as dusty, watery, and high-load environments. [0003] The research on lithium complex grease began in the 1960s. In 1962, the first lithium complex grease product in the United States passed the field test. Lithium complex greases have developed rapidly since the 1970s. Lithium complex greases containing dibasic acids, boric acid, and salicylic acid are c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10M177/00
Inventor 夏延秋闻振中冯欣
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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