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Preparation method for lubricating oil

A technology of lubricating oil and oil phase, applied in the field of lubricating oil technology, can solve the problems of poor rheological properties of vegetable oil, and achieve the effect of improving rheological properties, low pour point and good rheological properties

Inactive Publication Date: 2008-02-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation stability of vegetable oil can be effectively improved by selective hydrogenation, transesterification, and epoxidation, but the rheological properties of the modified vegetable oil become worse

Method used

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  • Preparation method for lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a) Weigh a certain amount of soybean oil and isooctyl alcohol, the molar ratio of soybean oil and isooctyl alcohol is 1:6, put it in a three-necked flask, use concentrated sulfuric acid as a catalyst, stir and react at 120°C for 2 hours, and after cooling, Pour out the reaction material, put it in a separatory funnel, wash it with water until neutral, release the water in the lower layer after layering, pour the oil phase into a three-necked flask, and distill at 80°C, and place the obtained transesterification product in a three-necked flask middle.

[0019] b) Insert a certain amount of formic acid, H 2 o 2 The dropping funnel of the mixed solution, the molar ratio of transesterified soybean oil, hydrogen peroxide, and formic acid is 1:2, keep the temperature at 40°C, add the mixed solution dropwise while stirring, and complete the dropwise addition within 2 hours. Keep the temperature at 40°C, continue the reaction at this temperature for 24 hours, pour out the rea...

Embodiment 2

[0023] a) Weigh rapeseed oil and isopropanol, the molar ratio of rapeseed oil to isopropanol is 1:3, place in a three-necked flask, use concentrated sulfuric acid as a catalyst, stir and react at 100°C for 1 hour, and after cooling, Pour out the reaction material, put it in a separatory funnel, wash it with water until neutral, release the water in the lower layer after layering, pour the oil phase into a three-necked flask, and distill at 80°C, and place the obtained transesterification product in a three-necked flask middle.

[0024] b) Insert a certain amount of formic acid, H 2 o 2 The dropping funnel of the mixed solution, the molar ratio of transesterified rapeseed oil and hydrogen peroxide is 1:3, keep the temperature at 60°C, add the mixed solution dropwise while stirring, and complete the dropwise addition within 1 hour. Keep the temperature at 60°C, continue the reaction at this temperature for 6 hours, pour out the reaction material, put it in a separatory funnel,...

Embodiment 3

[0028] a) Weigh sunflower oil and isononanol, the molar ratio of sunflower oil and isononanol is 1:9, place in a three-necked flask, use concentrated sulfuric acid as a catalyst, stir and react at 140°C for 3 hours, and react after cooling Pour out the material, put it in a separatory funnel, wash it with water until neutral, release the water in the lower layer after layering, pour the oil phase into a three-necked flask, and distill at 100°C, and place the obtained transesterification product in a three-necked flask .

[0029] b) Insert a certain amount of formic acid, H 2 o 2 The dropping funnel of the mixed solution, the molar ratio of transesterified sunflower oil and hydrogen peroxide is 1: 1.5, keep the temperature at 50°C, add the mixed solution dropwise while stirring, and complete the dropwise addition within one hour. Keep the temperature at 50°C, continue the reaction at this temperature for 12 hours, pour out the reaction material, put it in a separatory funnel,...

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Abstract

The invention discloses a lubricant preparing method, particularly relates to a method for preparing an environment-friendly polyester lubricating-oil basic oil. The invention takes use of chemical modification of vegetable oil to improve the rheologic behavior and oxidation stability. Firstly, the vegetable oil is mixed with alcohol for esterification reaction to achieve vegetable-oil monoester and introduce branched chain into the molecular structure. Subsequently, hydrogen peroxide is used to turn the double-bonds in the vegetable-oil basic oil into saturated epoxy-bonds; then, the epoxy-bonds are opened by fatty acid to achieve vegetable-oil monoether containing hydroxy groups. And finally, acetic anhydride is used to esterify the generated hydroxy groups and achieve polyether vegetable-oil ether. Compared with vegetable oil, the modified polyester vegetable-oil ether is largely improved in frictional behavior, rheologic behavior and oxidation stability.

Description

technical field [0001] The invention relates to a method for preparing an environment-friendly lubricating oil base oil, specifically a method for improving the rheological properties and oxidation stability of vegetable oil through chemical modification, and preparing it into an environment-friendly lubricating oil base oil method. The invention belongs to the technical field of lubricating oil technology. Background technique [0002] At present, 5-10 million tons of petroleum-based chemicals enter the biosphere every year. Oil pollution comes from petroleum refining, hydraulic oil and cutting oil leakage, etc. Vegetable oil has the excellent properties of being renewable, biodegradable, and non-toxic. Due to its high viscosity index, low volatility, and excellent lubricating properties, vegetable oil has gained more and more attention. However, the use of vegetable oils as lubricating oils has several disadvantages, including poor oxidative stability, poor thermal stabi...

Claims

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Application Information

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IPC IPC(8): C10M101/04C11B3/04
Inventor 段世杰毛宗强王诚刘志祥徐鹏
Owner TSINGHUA UNIV
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