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Composite calcium-base lubricating grease and its preparation

A technology of composite calcium base and lubricating grease, which is applied in the direction of lubricating compositions, petroleum industry, additives, etc., can solve the problems of complex production materials and processes, and achieve small changes in surface hardening value, good extreme pressure and anti-wear properties, and oxidation stability good sex effect

Active Publication Date: 2009-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of product needs to be mixed with calcium complex and polyurea, and the production materials and processes are relatively complicated.

Method used

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  • Composite calcium-base lubricating grease and its preparation
  • Composite calcium-base lubricating grease and its preparation
  • Composite calcium-base lubricating grease and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this example, the first method is used to prepare complex calcium-based grease.

[0052] At room temperature, take 630g of 500SN with a viscosity of 15cSt at 100°C, 1000ml of absolute ethanol and 120g of tetrabutyl titanate into the fat-making kettle, stir for 2 hours, add 62g of 12-hydroxystearic acid, and stir at 50°C for 4 hours. Thereafter, add 8.1 g of glacial acetic acid and 1.94 g of n-octanoic acid, stir evenly, then add 40.8 g of calcium hydroxide suspension with a concentration of 16.6% by weight, stir, continue to heat up to 220° C., and add 320 g of quenching oil. When the temperature drops below 70°C, take out the kettle. Grind twice with a three-wheel mill. The composition and properties of the product are shown in Table 1. The content of each component in the lubricating grease is 89.9% of base oil, 7.5% of thickener and 2.6% of titanium dioxide.

Embodiment 2

[0054] In this example, the second method is used to prepare complex calcium-based grease.

[0055] Add 47g of titanium tetrachloride to a beaker containing 100g of benzene under uniform stirring, slowly add 427g of isopropanol, and add 5mol / L ammonia water until the pH value is 6.5. After the reaction stopped, the reaction product was left to stand for 10 hours and then filtered, the ammonium chloride precipitate was separated from the titanium isopropoxide, and the filtrate titanium alkoxide was hydrolyzed with boiling water, and vigorously stirred to form a gel. Put it in a grease kettle.

[0056] Add 600g of ester oil with a viscosity of 20cSt at 100°C to this kettle, add 728g of calcium hydroxide suspension with a concentration of 12.5% ​​by weight, and after rapid stirring, add 118.28g of benzoic acid and 28.29g of boric acid, and add at 88°C 12-Hydroxystearic acid 98.18g, thereafter the temperature was gradually raised to 240°C, and 250g of quenching oil was added. Wh...

Embodiment 3

[0058] In this example, the first method is used to prepare complex calcium-based grease.

[0059] At room temperature, take 500g of 500SN with a viscosity of 15cSt at 100°C, 800ml of acetone, and 118g of tetrabutyl titanate into the fat-making kettle. After stirring for 3 hours, add 66g of 12-hydroxystearic acid. After stirring at 60°C for 6 hours, add ice Acetic acid 66g, adding concentration is 326g of calcium hydroxide solution of 15% by weight, gradually heating up to 220 ℃, adding 270g of quenching oil. When the temperature drops below 70°C, take out the kettle. Grind twice with a three-wheel mill. The content of each component in the lubricating grease is 18.4% of thickener, 78.6% of base oil and 3.0% of titanium dioxide. The composition and properties of the product are shown in Table 1.

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Abstract

The invention relates to a composite calcium-based lubricating grease, which contains the following components based on the total weight of the grease: 1) base oil, with a content of 68-95% by weight; 2) a composite calcium-based thickener, with a content of 4-95% by weight. 30% by weight; 3) Titanium dioxide, the content is 0.1 to 8% by weight. Said titanium dioxide is preferably present in the grease in the form of nanoparticles. The present invention also provides three preparation methods of the above lubricating grease. The composite calcium-based lubricating grease provided by the invention has the characteristics of good oxidation stability, small change in surface hardening value, high dropping point and good extreme pressure and wear resistance. The prepared lubricating grease is suitable for lubricating medium and heavy-duty equipment under relatively high temperature and humid conditions.

Description

technical field [0001] The invention relates to lubricating grease and a preparation method thereof, in particular to complex calcium-based lubricating grease and a preparation method thereof. Background technique [0002] Calcium complex lubricating grease is a high-quality lubricating grease with high temperature resistance, pressure resistance and wide application. It has good mechanical stability and colloidal stability. [0003] At present, the production process of complex calcium-based grease can be divided into three stages: saponification, compounding, and thickening into grease. For example, in US 4,787,992, C10-C20 synthetic fatty acids, middle molecular acids and glacial acetic acid are reacted with calcium hydroxide. [0004] In recent years, in order to improve the performance of complex calcium-based grease, polyurea grease has been introduced into it. This is because calcium-based grease has the defect of surface hardening, which brings inconvenience in use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/10
Inventor 孙洪伟刘大军姚智勤杨玮王平王金凤
Owner CHINA PETROLEUM & CHEM CORP
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