Composite sodium-based lubricating grease and preparation method thereof

A composite sodium-based lubricating grease and lubricating grease technology, which is applied in the direction of lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of related research without graphene application, achieve excellent thermal stability, shorten saponification time, The effect of good mechanical stability

Active Publication Date: 2015-04-29
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 grease, such as nano-silica, 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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  • Composite sodium-based lubricating grease and preparation method thereof
  • Composite sodium-based lubricating grease and preparation method thereof

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preparation example Construction

[0027] According to the second aspect of the present invention, the present invention provides a method for preparing a composite sodium-based grease, the method comprising: uniformly mixing graphene, a composite sodium-based thickener and part of the base oil, at a constant temperature of 180-230°C Refining, cooling, adding the remaining base oil, and adding necessary additives to obtain the finished product.

[0028] Among them, the amount of graphene, composite sodium-based thickener, and base oil makes the resulting composite sodium-based grease, based on the weight of the grease, include the following components: 65-95% lubricating base oil, 5-30% Composite sodium-based thickener, 0.2-15% graphene.

[0029] Preferably, the amount of graphene, composite sodium base thickener, and base oil makes the resulting composite sodium base grease, based on grease weight, include the following components: 70-90% lubricating base oil, 8- 25% complex sodium-based thickener, 1-10% grap...

Embodiment 1

[0046] Preparation of graphene oxide:

[0047] 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.

[0048] Preparation of graphene:

[0049] 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 sodium grease:

[0058] Raw material components: graphene 31.2g; 150BS base oil 420g (viscosity at 100°C is 31mm 2 / s); 23.26g sodium hydroxide; 13.40g terephthalic acid; 121.18g 12-hydroxystearic acid; 1.8g diisooctyl diphenylamine;

[0059] Add 31.2 grams of graphene, 210 grams of base oil and 121.18 grams of 12-hydroxystearic acid into the fat-making kettle, heat and stir, when the temperature rises to 90 ° C, add lye containing 23.26 grams of sodium hydr...

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Abstract

The invention discloses composite sodium-based lubricating grease and a preparation method thereof. By the weight of the lubricating grease, the compound sodium-based lubricating grease comprises the following components: 65-95% of lubricating base oil, 5-30% of a composite sodium-based thickener and 0.2-15% of graphene. The composite sodium-based lubricating grease disclosed by the invention has excellent properties such as high temperature resistance, water resistance, adhesivity, colloid stability, extreme pressure antiwear property, long lubricating life, corrosion resistance and salt fog resistance.

Description

technical field [0001] The invention relates to a lubricant material, in particular to a composite sodium-based lubricating grease and a preparation method thereof. Background technique [0002] Introducing a small amount of low-molecular-weight acidic compounds or their salts into sodium-based grease can obtain complex sodium-based grease with a dropping point higher than that of simple sodium soap. For example, adding a small amount of sodium salicylate soap to sodium fatty acid soap grease and heating it to 257°C can increase the dropping point of sodium-based grease. Simultaneously add 0.1-5% sodium acrylic acid salt in the lubricating grease that contains 5-35% fatty acid sodium soap, can reduce the solubility of sodium soap in water as US2468098; Morway et al. Molecular acid preparation of complex sodium grease. CN101153236A added solid powders with different particle size distributions to the grease, which not only enhanced the water resistance of the grease, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M123/02C10M177/00
Inventor 么佳耀郑会孙洪伟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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