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

A calcium-based lubricating grease and lubricating grease technology, applied in lubricating compositions, petroleum industry, thickeners, etc., can solve problems such as related research without graphene application, achieve shortening saponification time, enhance ability, and improve anti-oxidation effect of ability

Active Publication Date: 2018-05-18
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 anhydrous calcium-based 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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  • A kind of anhydrous calcium base lubricating grease and preparation method thereof
  • A kind of anhydrous calcium base lubricating grease and preparation method thereof

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preparation example Construction

[0026] According to the second aspect of the present invention, the present invention provides a kind of preparation method of anhydrous calcium-based lubricating grease, the method comprises: mixing graphene, anhydrous calcium-based thickener and part of base oil uniformly, at 140-160 Refining at constant temperature at ℃, cooling, adding the remaining base oil and necessary additives to obtain the finished product.

[0027] Wherein, the amount of graphene, anhydrous calcium-based thickener and base oil is based on the weight of the obtained lubricating grease, including the following components: 60-90% lubricating base oil, 5-30% anhydrous calcium-based Thickener, 0.2-15% graphene. The preferred amounts of graphene, anhydrous calcium-based thickener and base oil are such that, based on the weight of the resulting grease, the following components are included: 65-80% lubricating base oil, 8-25% anhydrous calcium-based thickener Chemical agent, 1-10% graphene.

[0028] Accor...

Embodiment 1

[0044] Preparation of graphene oxide:

[0045] 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 50ml of deionized water to dilute. During the process, a lot of heat is released, and the temperature is lower than 100°C in an ice bath. After adding 50ml of water, the mixture is stirred for 0.5h, and then 200ml of deionized water is added for further dilution. Potassium permanganate was then reduced by adding 10 ml of a 30% by weight aqueous hydrogen peroxide solution. Then 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.

[0046] Preparation of graphene:

[0047] Add 0.1g of the graphene oxide prepared above to 100ml ...

Embodiment 2

[0053] The preparation of graphene oxide is the same as in Example 1.

[0054] Preparation of graphene:

[0055] 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.

[0056] Preparation of anhydrous calcium-based grease:

[0057] Raw material components: graphene 10.8kg; 500SN base oil 442.2kg (viscosity at 100°C is 10mm 2 / s); calcium hydroxide 18.23kg; stearic acid 136.11kg; 1.8kg diisooctyl diphenylamine;

[0058] Add 295kg of base oil, 10.8kg of graphene and 136.11kg of stearic acid into the fat-making kettle, heat and stir, when the temperature rises to 105°C, add 18.23kg of calcium hydroxide and 9kg of water, and saponify for 0.2h; the reaction ...

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Abstract

The invention discloses an anhydrous calcium-based lubricating grease and a preparation method thereof. Based on the grease weight, the anhydrous calcium-based grease includes the following components: 60-90% lubricating base oil, 5-30% anhydrous calcium-based thickener, and 0.2-15% graphene. The anhydrous calcium-based lubricating grease of the present 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 an anhydrous calcium-based lubricating grease and a preparation method thereof. Background technique [0002] my country began to produce calcium-based lubricating grease in the 1940s. Because of its simple production process and equipment, easy access to raw materials, and low product cost, it is very popular among producers and users. However, because it contains a certain amount of structural water, When the operating temperature exceeds 100°C, water is easy to evaporate and lose, resulting in the destruction of the structure of calcium-based grease and the loss of lubricating effect. Therefore, calcium-based grease is generally only used on friction parts where the working temperature does not exceed 60°C. The anhydrous calcium-based grease does not contain water, the dropping point is higher than 140°C, and the maximum operating temperature is 50°C higher than that of ordinary calcium-base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10M177/00C10N50/10C10N30/06C10N30/08C10N30/10C10N30/12
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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