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An additive for improving the extreme pressure anti-wear performance of lubricating grease and its preparation method

An extreme pressure and anti-wear, grease technology, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problems of poor anti-wear performance of grease, increase production cost, increase processing burden, etc., to improve extreme pressure resistance Grinding performance, waste reduction treatment, effect of usage reduction

Active Publication Date: 2022-02-18
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. According to patents CN102250139A and CN1144223A, the products made into lubricating grease have poor anti-wear performance and cannot meet the requirements;
[0011] 2. The patent CN1144223A has an excess of zinc oxide of 25-30%, which is costly, and the subsequent waste residues cause high processing costs;
[0012] 3. Both patent CN1144223A and patent CN102250139A need to add propellants, CN102250139A adds glacial acetic acid, and patent CN1144223A adds concentrated ammonia water, which will increase production costs and increase the burden for subsequent processing

Method used

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Examples

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preparation example Construction

[0041] The invention provides a method for preparing an additive for improving the extreme pressure and anti-wear properties of lubricating grease, comprising:

[0042] S1. Phosphorus pentasulfide reacts with the mixed alcohol of n-butanol and isooctyl alcohol to generate sulfuric acid;

[0043] Specifically include:

[0044] S11. Add the first part of phosphorus pentasulfide to the container, and then add the first part of mixed alcohol; wherein, the addition of the first part of phosphorus pentasulfide is 40% of the total weight, and the addition of the first part of mixed alcohol is 1 to 5% of the total volume;

[0045] S12. Raise the temperature to the first preset temperature, and add the second part of mixed alcohol dropwise; wherein, the first preset temperature is 60±2°C, and the total amount of the first part of mixed alcohol and the second part of mixed alcohol is 25% of the total volume , the dropping time of the second part of mixed alcohol is 10-20min;

[0046] ...

Embodiment 1

[0060] The invention provides a method for preparing an additive for improving the extreme pressure and anti-wear properties of lubricating grease, comprising:

[0061] Add the phosphorus pentasulfide of 222.0g in the four-necked flask, the phosphorus pentasulfide adds in two times, the first time adds the phosphorus pentasulfide of 88.8g, and connects the tail gas treatment device; Alcohol is mixed evenly before adding dropwise), the temperature is raised to 60±2°C, and the mixed alcohol is added dropwise, adding a total of 104.0g, and the dropping time is about 15min. Afterwards, raise the system temperature to 85±2°C, add the remaining 133.2g of phosphorus pentasulfide, and start to drop the remaining 312.2g of mixed alcohol for about 45 minutes. After adding the acid dropwise, raise the temperature to 90±2°C and start to keep warm for 2 hours, then filter while hot to remove unreacted phosphorus pentasulfide to obtain sulfuric acid; add 36.0g of 150N base oil into a four-n...

Embodiment 2

[0063] The invention provides a method for preparing an additive for improving the extreme pressure and anti-wear properties of lubricating grease, comprising:

[0064] The proportion of antimony trioxide in Example 1 was changed to 20%, and the rest remained the same as in Example 1 to obtain a light yellow transparent finished product.

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PUM

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Abstract

The invention discloses an additive and a preparation method for improving the extreme pressure anti-wear performance of lubricating grease. The additive is n-butyl and isooctyl dithiophosphate; the preparation method is: phosphorus pentasulfide, n-butanol and isooctyl alcohol Mixed alcohols react to generate sulfuric acid; sulfuric acid reacts with the mixture of zinc oxide and antimony trioxide to generate n-butyl, isooctyl dithiophosphate; the additive of the present invention is used in grease, and its more It is easy to form an anti-wear and extreme-pressure oil film due to thermal decomposition, so the extreme-pressure and anti-wear properties of grease can be improved by controlling a single additive.

Description

technical field [0001] The invention relates to the technical field of lubricating grease additives, in particular to an additive for improving the extreme pressure and anti-wear properties of lubricating grease and a preparation method. Background technique [0002] Grease is a solid or semi-solid lubricant formed by dispersing a thickener in one or more liquid lubricants. In some occasions, lubricating grease is selected to replace the usual lubricating oil for lubrication. The main advantage is that the lubricating grease can adhere to the two friction surfaces that are in contact with each other, and the lubricating grease will generally not be lost from the lubricating part. The thickener in the grease is used to reduce the loss caused by gravity, pressure or centrifugal motion. [0003] Grease is used where other liquid lubricants may be lost or leaked. The structure of grease is like a lubricant reservoir, so there is no need to repeatedly lubricate a certain part wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M137/10C10N30/06
CPCC10M137/10C10M2223/045C10N2030/06
Inventor 王建徐坤范金凤
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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