Diesel oil pour-point depressant and preparation method and application thereof

A diesel pour point depressant and its preparation process technology, applied in the field of diesel pour point depressant and its preparation, can solve the problems of poor broad-spectrum, achieve the effect of improving the cold filter point, stable performance, and excellent pour point depressant effect

Inactive Publication Date: 2015-04-22
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a diesel fuel point depressant in order to solve the problem that (meth)acrylic acid ester point depressants have a poor use of a broad spectrum and maleic anhydride type point depressants are limited to carbon-carbon double bond reactions. , the diesel pour point depressant, because it is considered that after the polymerization of maleic anhydride and methacrylate, an amine group is introduced on the carbon-oxygen bond of maleic anhydride for amination, which not only makes other carbon-carbon double bonds of maleic anhydride The bond can be utilized, the reaction is more diversified, and the problem of poor broad-spectrum of methacrylic acid to different oils is solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of diesel oil point depressant, it is prepared by the method comprising the following steps:

[0052] (1) Add 12.9g methacrylic acid, 21.4g higher aliphatic alcohol, 50ml solvent 1 toluene, 0.40g catalyst p-toluenesulfonic acid, 0.18g Inhibitor hydroquinone, after stirring evenly, control the temperature at 120°C for esterification reaction for 6 hours to obtain reaction solution 1;

[0053] Described higher fatty alcohol is tetradecyl alcohol;

[0054] The obtained reaction solution 1 was distilled under reduced pressure for 0.5-1h at a temperature of 55-60°C controlled by a rotary evaporator until no more solvent was evaporated from the system to remove the toluene solvent, then cooled to room temperature, and an equal volume of petroleum ether was added to redissolve , followed by washing with 5% NaOH aqueous solution to remove toluenesulfonic acid amide, hydroquinone and unreacted methacrylic acid, and then washing with distilled water until the pH of the ef...

Embodiment 2

[0070] The difference from Example 1 is:

[0071] In step (1), the addition of p-toluenesulfonic acid is 1.0% of the total mass of methacrylic acid and higher fatty alcohol, and the addition of hydroquinone is 0.4% of the total mass of methacrylic acid and higher fatty alcohol;

[0072] In step (2), the amount of benzoyl peroxide added is 0.5% of the total mass of methacrylate and maleic anhydride;

[0073] The amine used in the step (3) is hexadecylamine, and the amount of p-toluenesulfonic acid is 0.5% of the total mass of methacrylate maleic anhydride copolymer and higher fatty amine;

[0074] Others are the same as in Example 1.

Embodiment 3

[0076] The difference from Example 1 is:

[0077] In step (1), the addition of p-toluenesulfonic acid is 1.6% of the total mass of methacrylic acid and higher fatty alcohol, and the addition of hydroquinone is 1.0% of the total mass of methacrylic acid and higher fatty alcohol;

[0078] In step (2), the amount of benzoyl peroxide added is 0.8% of the total mass of methacrylate and maleic anhydride;

[0079] The amine used in the step (3) is tetradecylamine, and the amount of p-toluenesulfonic acid is 0.8% of the total mass of methacrylate maleic anhydride copolymer and higher fatty amine;

[0080] Others are the same as in Example 1.

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PUM

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Abstract

The invention discloses a diesel oil pour-point depressant and a preparation method thereof, wherein the diesel oil pour-point depressant is prepared by the steps: carrying out an aminolysis reaction on a methacrylate maleic anhydride copolymer and higher fatty amine for 6 h with toluene as a solvent and p-toluenesulfonic acid as a catalyst and at a reflux temperature, adding methanol having the same volume as the reaction liquid volume into the obtained reaction liquid, producing a white precipitate, removing a supernatant, washing the obtained white precipitate with toluene, carrying out methanol precipitation to remove the catalyst p-toluenesulfonic acid, then controlling the temperature at 50 DEG C, and carrying out vacuum drying to obtain the diesel oil pour-point depressant. The diesel oil pour-point depressant solves the problems that a (methyl) acrylate pour-point depressant has poor adaptability with diesel oils with different carbon chains, at the same time, makes the reaction of maleic anhydride more diversified, provides another possibility for combination of a maleic anhydride pour-point depressant with the (methyl) acrylate pour-point depressant, effectively improves the condensation point and the cold filter plugging point of No.0 diesel oil, and enables the cold filter plugging point to be superlatively reduced by 11-12 DEG C.

Description

technical field [0001] The invention relates to a diesel pour point depressant and its preparation method and application. Background technique [0002] Ordinary diesel oil contains more straight-chain alkanes, so it is easy to condense into paraffin and precipitate when the temperature is low, which will block the oil circuit of the diesel engine and affect the normal operation of the engine. Therefore, diesel vehicles in northern my country use low-grade diesel when the temperature is low. Diesel pour point depressant is also called diesel low-temperature fluidity improver, adding a small amount can greatly improve the low-temperature fluidity of diesel. [0003] The main function of the pour point depressant is to reduce the low-temperature fluidity of the oil, that is, the condensation point and the cold filter point. In particular, the reduction of its cold filter point highlights the advantages and disadvantages of the performance of the pour point depressant. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/06C08F8/32C10L1/196
Inventor 韩生黄路敏何义周明安
Owner SHANGHAI INST OF TECH
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