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Low-sulfur diesel oil lubrication additive and preparation method and application thereof

A lubricating additive and low-sulfur diesel technology, which is applied in the direction of fuel additives, carboxylate preparation, chemical instruments and methods, etc., can solve the problems of poor matching of additives, increased content of diesel pollutants, and poor dispersion performance. Achieve good thermal stability and oxidation stability, good compatibility, and lower freezing point

Inactive Publication Date: 2012-01-11
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these patents have improved the lubricating performance of diesel oil, they have also reduced other properties and indicators of diesel oil: such as poor dispersion performance; increased content of diesel pollutants; and poor matching with existing additives, etc.

Method used

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  • Low-sulfur diesel oil lubrication additive and preparation method and application thereof
  • Low-sulfur diesel oil lubrication additive and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Inject petroleum acid and ethanol into a three-necked flask with a mass ratio of 1:1, add p-toluenesulfonic acid accounting for 5% of the mass fraction of petroleum acid, install a water separator and a reflux condenser, heat to 80°C, and stir at a stirring speed of 500r / Min under the reaction, 4h after the end of the reaction. After cooling, wash with water three times, separate the lower aqueous phase, take the upper petroleum ester phase, dry under reduced pressure for 30 min at a temperature of 40°C and a pressure of 0.01Mpa, and finally dry with anhydrous sodium sulfate.

[0024] Add the ethyl petroleum acid prepared according to the above-mentioned method and conditions to the low-sulfur diesel oil, and the addition amounts are 0.5wt%, 1wt%, and 2wt%. Using the four-ball machine friction test to investigate the lubricating performance of diesel oil, using the wear scar diameter as an index, under the pressure of 292N, the speed is 1450r / min, the friction time is ...

Embodiment 2

[0029] Inject petroleum acid and methanol into a three-necked flask at a mass ratio of 1:1, add p-toluenesulfonic acid accounting for 5% of the petroleum acid mass fraction, install a water separator and a reflux condenser, heat to 80°C, and stir at a speed of 500r / Min under the reaction, 4h after the end of the reaction. After cooling, wash with water three times, separate the lower aqueous phase, take the upper petroleum ester phase, dry under reduced pressure for 30 min at a temperature of 40°C and a pressure of 0.01Mpa, and finally dry with anhydrous sodium sulfate.

[0030] Add the methyl petroleum acid prepared according to the above-mentioned method and conditions to low-sulfur diesel oil, and the addition amounts are 0.5%, 1%, and 2%, respectively. Using the four-ball machine friction test to investigate the lubricating performance of diesel oil, using the wear scar diameter as an index, under the pressure of 292N, the speed is 1450r / min, the friction time is 30min, t...

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Abstract

The invention relates to a low-sulfur diesel oil lubrication additive and a preparation method and an application thereof, and the raw materials are petroleum acid and alcohol; petroleum acid and alcohol are used as raw materials with a mass ratio of 20:1-1:20; a certain amount of p-toluenesulfonic acid is added, and a reaction is carried out with a certain stirring speed; when the reaction completes, the product is cooled and washed with water for 1-5 times; the lower water phase is separated, and the upper petroleum acid ester phase is dried under a condition with a temperature of 20-80 DEG C and a pressure of less than 0.1 MPa for 10-60 min so as to obtain the low-sulfur diesel oil lubrication additive; the low-sulfur diesel oil lubrication additive is added into low-sulfur diesel oil with a blending temperature of 10-80 DEG C and a blending time of 1-60 min. The advantages of the invention are that: the low-sulfur diesel oil lubrication additive of the invention has less using amount and good lubrication effect; the preparation process is simple and the conditions are mild; the utilization value of petroleum acid is increased; the lubrication additive has good thermal stability and oxidation stability, and good compatibility with low-sulfur diesel oil.

Description

【Technical field】 [0001] The invention relates to the technical field of diesel oil, in particular to a lubricating additive for low-sulfur diesel oil and its preparation method and application. 【Background technique】 [0002] As people's requirements for environmental protection are increasing day by day, countries and regions all over the world have formulated relatively strict vehicle fuel standards, among which sulfur content is an indicator that is strictly controlled. Although low-sulfur vehicle diesel oil is cleaner and more environmentally friendly, some natural polar substances that play an anti-wear role are removed during its refining process, which greatly reduces the lubricity of diesel oil and weakens the lubricating ability of the engine injection system, which affects normal operation of the engine. [0003] The most direct and economical way to solve the lubrication problem of low-sulfur diesel oil is to add a small amount of lubricating additives to diesel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/08C10L1/19C07C67/08
Inventor 邹滢牛晓敏
Owner EAST CHINA UNIV OF SCI & TECH