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A kind of complex calcium base lubricating grease and preparation method thereof

A technology of composite calcium base and lubricating grease, which is applied in the direction of lubricating composition, petroleum industry, thickener, etc., can solve the problems of related research without graphene application, achieve excellent thermal stability, good compatibility, improve The effect of antioxidant capacity

Active Publication Date: 2017-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanomaterials are also gradually used in the application of lithium-based grease, such as nano-silicon dioxide, nano-diamond, nano-titanium dioxide, nano-zinc oxide, etc., but there is still no research on the application of graphene in grease

Method used

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  • A kind of complex calcium base lubricating grease and preparation method thereof
  • A kind of complex calcium base lubricating grease and preparation method thereof

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preparation example Construction

[0028] According to the second aspect of the present invention, the present invention provides a preparation method of complex calcium-based lubricating grease, the method comprising: mixing graphene, complex calcium-based thickener and part of the base oil uniformly, at a constant temperature of 180-230°C Refining, cooling, adding the remaining base oil and adding necessary additives to get the finished product.

[0029] Wherein, the consumption of graphene, composite calcium-based thickener and base oil is preferably such that the obtained composite calcium-based grease, based on grease weight, includes the following components: 65-95% lubricating base oil, 6-20% Composite calcium-based thickener, 0.2-15% graphene.

[0030] Preferably, the consumption of graphene, complex calcium-based thickener and base oil preferably makes the gained complex calcium-based grease, based on grease weight, include the following components: 75-88% lubricating base oil, 8- 18% complex calcium-...

Embodiment 1

[0045] Preparation of graphene oxide:

[0046] Mix 1g of graphite flakes, 0.5g of sodium nitrate and 23ml of concentrated sulfuric acid in an ice bath, slowly add 3g of potassium permanganate while stirring, keep the temperature below 10°C and stir for 1h, then stir the mixture at 35°C for 0.5h, then add Dilute with 50ml of deionized water, a lot of heat is released during the process, keep the temperature below 100°C in an ice bath, after adding 50ml of water, stir the mixture for 0.5h, then add 200ml of deionized water for further dilution. Potassium permanganate was then reduced by adding 10 ml of a 30% by weight aqueous hydrogen peroxide solution. Finally, the mixture was washed and filtered with 5% hydrochloric acid (400ml) to remove metal ions. Then, the acid was removed with 0.5 L of deionized water, and dried at 60 °C for 24 h to obtain graphene oxide.

[0047] Preparation of graphene:

[0048] Add 0.1g of the graphene oxide prepared above to 100ml of water for ultr...

Embodiment 2

[0054] The preparation of graphene oxide is the same as in Example 1.

[0055] Preparation of graphene:

[0056] Add 0.1 g of the prepared graphene oxide into 100 ml of water for ultrasonic dispersion (ultrasonic frequency 35 kHz) for 30 min, then add 5 ml of hydrazine hydrate (mass concentration: 85%), and react in an oil bath at 100 ° C for 24 h. The powder obtained after water washing, suction filtration and drying is graphene, and the properties of graphene are shown in Table 2 below.

[0057] Preparation of complex calcium-based grease:

[0058] Raw material components: graphene 40.2kg; 150BS base oil: 450kg (viscosity at 100°C is 30mm 2 / s); calcium hydroxide 38.84kg; acetic acid 44.47kg; terephthalic acid 15.39g; 12-hydroxystearic acid 27.84kg; antioxidant 1.8kg diisooctyl diphenylamine;

[0059] First add 40.2kg of graphene, 230kg of base oil and a suspension containing 38.84kg of calcium hydroxide into the fat-making kettle, stir and mix. At room temperature, add ...

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Abstract

The invention discloses a composite calcium-based lubricating grease and a preparation method thereof. Based on the grease weight, the complex calcium-based grease includes the following components: 65-95% lubricating base oil, 6-20% complex calcium-based thickener, and 0.2-15% graphene. The composite calcium-based lubricating grease of the invention has excellent properties such as high temperature resistance, water resistance, adhesion, colloid stability, extreme pressure and wear resistance, lubrication life, corrosion resistance and salt spray resistance.

Description

technical field [0001] The invention relates to a lubricant material, specifically a composite calcium-based lubricating grease and a preparation method thereof. Background technique [0002] Complex calcium-based grease is the earliest complex soap-based grease developed. It is a lubricating grease made of complex calcium soap thickened with medium-viscosity mineral lubricating oil or synthetic lubricating oil made of fatty acid calcium soap and low molecular acid calcium salt. Grease products, with high temperature resistance, little change in consistency under high temperature, good water resistance, mechanical stability, colloidal stability and good extreme pressure, wide temperature range, is a kind of High quality grease for a wide range of uses. However, due to the hardening problem of calcium complex grease during storage and use, its popularization and application are greatly limited. [0003] In recent years, in order to improve the performance of complex calcium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10M177/00C10N50/10C10N30/10C10N30/08C10N30/06
Inventor 郑会孙洪伟么佳耀何懿峰段庆华张建荣陈政刘中其姜靓
Owner CHINA PETROLEUM & CHEM CORP
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