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Method for preparing low-pour-point lubricant additive from low-priced cotton seed oil

A technology for lubricating oil additives and cottonseed oil, which is applied in the direction of additives, carboxylate preparation, lubricating compositions, etc., to achieve the effects of high product yield and purity, improved performance, and environmental friendliness

Inactive Publication Date: 2014-03-05
深圳市四方精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the research of vegetable oil synthetic lubricating oil additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a. Place a mixture of 50g cottonseed oil, 16g methanol and 0.2g potassium hydroxide in a three-necked reaction flask, mix well, and raise the temperature to 70°C with stirring, the reaction time is 1h;

[0039] b. After the reaction, the reaction mixture is transferred to a separatory funnel and left to stand for layering. The water layer is separated. The oil layer is washed with water until it is neutral, and distilled under reduced pressure to obtain fatty acid methyl esters. Among them, the acid value is 0.5 and the yield is 96%. ;

[0040] c. Put the mixture of refined 50g fatty acid methyl ester, 12.5g formic acid and 25g petroleum ether in a three-necked reaction flask with electric stirring, dropping funnel and condenser, and place it in a constant temperature water bath, mix well and stir under Raise the temperature to 45°C, and add dropwise a mixture of hydrogen peroxide and phosphoric acid with a mass ratio of 1.3:0.005;

[0041] d. After the dropwise addition of t...

Embodiment 2

[0047] a. Put a mixture of 50g cottonseed oil, 18g methanol and 0.25g potassium hydroxide in a three-necked reaction flask, mix well, raise the temperature to 76℃ with stirring, and react for 2h;

[0048] b. After the reaction, the reaction mixture is transferred to a separatory funnel and left to stand for layering. The water layer is separated, the oil layer is washed with water until it is neutral, and the fatty acid methyl ester is obtained by distillation under reduced pressure. Among them, the acid value is 0.4 and the yield is 97%. ;

[0049] c. Put the mixture of refined 50g fatty acid methyl ester, 12.5g formic acid and 25g petroleum ether in a three-necked reaction flask with electric stirring, dropping funnel and condenser, and place it in a constant temperature water bath, mix well and stir under Raise the temperature to 50°C and add dropwise a mixture of hydrogen peroxide and phosphoric acid with a mass ratio of 1.3:0.005;

[0050] d. After the dropwise addition of the ...

Embodiment 3

[0056] a. Place a mixture of 50g cottonseed oil, 20g methanol and 0.2g potassium hydroxide in a three-necked reaction flask, mix well, raise the temperature to 78℃ with stirring, and react for 2h;

[0057] b. After the reaction, the reaction mixture is transferred to a separatory funnel and left to stand for layering. The water layer is separated. The oil layer is washed to neutrality with water and distilled under reduced pressure to obtain fatty acid methyl esters. Among them, the acid value is 0.6 and the yield is 94%. ;

[0058] c. Put the mixture of refined 50g fatty acid methyl ester, 12.5g formic acid and 25g petroleum ether in a three-necked reaction flask with electric stirring, dropping funnel, and condenser, and place it in a constant temperature water bath, mix well and stir down To a temperature of 55°C, drop a mixture of hydrogen peroxide and phosphoric acid with a mass ratio of 1.3:0.005;

[0059] d. After the dropwise addition of the mixture of hydrogen peroxide and ...

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Abstract

The invention discloses a method for preparing a low-pour-point lubricant additive from low-priced cotton seed oil. The method comprises the following steps: mixing cotton seed oil, methanol and potassium hydroxide so as to prepare fatty acid methyl esters, uniformly mixing the fatty acid methyl esters, formic acid and petroleum ethers at room temperature, stirring and heating the obtained mixture, dripping a mixture of hydrogen peroxide and phosphoric acid into the obtained mixture, standing the obtained product to carry out delamination, separating a water layer, washing an oil layer by using water until the oil layer is neutral, and carrying out reduced pressure distillation to obtain colorless transparent oily epoxidized fatty acid methyl esters, wherein the epoxy value is greater than 4-7, the iodine value is less than 2-0, the acid value is less than 1, and the yield is 90-94%; adding calcium carbonate into a residual formic acid solution after reaction so as to obtain calcium formate which can be recycled; and carrying out esterification reaction on the epoxidized fatty acid methyl esters so as to obtain epoxidized fatty acid methyl ester mixed fatty acid esters. According to the method disclosed by the invention, atalyst application amount is low, the process is clean, the implementation conditions are simple, and the mass production can be implemented conveniently.

Description

Technical field [0001] The invention relates to a method for preparing epoxy cottonseed oil methyl ester by hydrogen peroxide oxidation. Background technique [0002] Vegetable oil has good lubricity, degradability, viscosity-temperature properties, a wide range of sources, and renewable conditions, making it a very competitive base oil for degradable lubricants. However, vegetable oil molecules contain a large number of unsaturated bonds and have poor oxidation stability, which limits the use of vegetable oils as lubricant base oils. Modification and functional modification of vegetable oils can make vegetable oils have good oxidation resistance, extreme pressure and anti-wear properties, and improve the performance of vegetable oils as lubricating oil base oils or additives. [0003] Low-priced vegetable oils, such as cottonseed oil, peanut oil, rapeseed oil, etc., and a large amount of domestic waste oil is mainly composed of vegetable oil. At present, more and more such oils a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M129/66C11C3/00C11C3/04C07C51/41C07C53/06
Inventor 吾满江·艾力夏木西卡玛尔·买买提蔡国星张乐涛努尔买买提·阿布都克力木
Owner 深圳市四方精细化工有限公司
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