Low-temperature flow modifier for diesel oil and method for preparing the same

A flow improver, low temperature technology, applied in the field of low temperature flow improver for diesel and its preparation, can solve the problems of poor susceptibility of high waxy hydrogenated diesel oil, achieve good economic and social benefits, excellent use effect, good susceptibility Effect

Inactive Publication Date: 2009-07-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of intermediate product that utilizes the copolymer of ethylene-vinyl acetate-vinyl alcohol to be synthesized through esterification reaction in view of the poor susceptibility of diesel oil low-temperature flow improver to high-waxy hydrogenated diesel oil at home and abroad, The preparation method of low-temperature flow improver for diesel oil obtained through in-situ amination reaction, the produced pour point depressant can not only effectively reduce the cold filter point and freezing point of diesel oil, improve the yield of light oil, but also have a good effect on waxy oil Diesel works too

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Add 200ml of xylene to a 500ml reactor, then add 78.5g of ethylene-vinyl acetate-vinyl alcohol copolymer, 4g of dodecylbenzenesulfonic acid, and 100g of lauric acid, and heat to reflux at 135°C to react After 10 hours, a mixture with a degree of esterification of about 52% was obtained, and an intermediate product was obtained by distillation under reduced pressure at a vacuum of 2 kPa.

[0014] (2) Add the above-mentioned intermediate product to 195g aromatic hydrocarbon solvent C 9 , after stirring evenly, under the condition of cooling, add about 4g coconut oil amine to obtain diesel oil low temperature flow improver 1 of the present invention # .

Embodiment 2

[0016] (1) Add 180ml of xylene into a 500ml reactor, then add 80g of ethylene-vinyl acetate-vinyl alcohol copolymer, 4g of dodecylbenzenesulfonic acid, and 143g of stearic acid, and heat to reflux at 140°C to react After 8 hours, a mixture with an esterification degree of about 50% was obtained, and an intermediate product was obtained by distillation under reduced pressure at a vacuum of 1.5 kPa.

[0017] (2) Add the above-mentioned intermediate product to 195gC 9 , after stirring evenly, under cooling, add about 10g of hexylamine to obtain diesel oil low temperature flow improver 2 of the present invention # .

Embodiment 3

[0019] (1) Add 200ml of xylene to a 500ml reactor, then add 81.5g of ethylene-vinyl acetate-vinyl alcohol copolymer, 4g of dodecylbenzenesulfonic acid, and 100g of lauric acid, and heat to reflux at 135°C to react After 12 hours, a mixture with a degree of esterification of about 52% was obtained, and an intermediate product was obtained by distillation under reduced pressure at a vacuum of 1.5 kPa.

[0020] (2) Add above-mentioned intermediate product to 200g aromatic hydrocarbon solvent C 9 , after stirring evenly, under cooling, add about 4g of tallow amine to obtain diesel oil low temperature flow improver 3 of the present invention # .

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PUM

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Abstract

The present invention relates to a low-temperature flow improver for diesel oil obtained by using an intermediate product synthesized through an esterification reaction of an ethylene-vinyl acetate-vinyl alcohol copolymer, and then through an in-situ amination reaction, and a preparation method thereof, which is characterized in that ethylene- Copolymer of vinyl acetate-vinyl alcohol is esterified with C8-18 fatty acid under the action of catalyst dodecylbenzenesulfonic acid or p-toluenesulfonic acid at 130-160℃, then add aromatic hydrocarbon solvent C9, add C6- 18 fatty amines are aminated in situ to obtain the compound of ethylene-vinyl acetate-C8-18 fatty acid ester copolymer and C6-18 fatty amine ester of dodecylbenzenesulfonic acid. High-grade diesel oil and blended diesel oil generally have good sensitivity, and have excellent use effects on diesel oil with a large proportion of hydrogenated diesel oil and high wax content.

Description

technical field [0001] The invention relates to a low-temperature flow improver for diesel oil obtained by using an intermediate product synthesized through an esterification reaction of an ethylene-vinyl acetate-vinyl alcohol copolymer and then through an in-situ amination reaction and a preparation method thereof. Background technique [0002] The low-temperature performance of diesel is an important index of diesel. Diesel with poor low-temperature performance will affect the normal operation of the diesel engine when the temperature is low. Case flow performance is the commonly used method. At present, the research on diesel low-temperature flow improvement technology is relatively active at home and abroad, especially in economically developed countries, where a variety of polymer-type pour point depressants have been researched and developed. Foreign commercialized products include: the first type is ethylene-vinyl acetate; the second type is ethylene-acrylic acid est...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F216/00C10L1/22C10L1/18
Inventor 蒋新坤朱景利赵纯革姜明才赵建国王大明王金平徐浩
Owner PETROCHINA CO LTD
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