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Preparation method of quadripolymer pour point depressant for diesel oil

A technology of diesel pour point depressant and quaternary copolymer, which is applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problem that the diesel pour point depressant has a single component, cannot adapt to petroleum products with different structures, and has poor pour point depressant effect Ideal and other issues, to achieve the effect of good pour point depressing effect

Active Publication Date: 2016-04-27
LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing diesel pour point depressant has a single component and cannot adapt to petroleum products with different structures, so the pour point depressant effect is not ideal
With the increasing production of waxy crude oil, the existing diesel pour point depressants can no longer meet the needs

Method used

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  • Preparation method of quadripolymer pour point depressant for diesel oil
  • Preparation method of quadripolymer pour point depressant for diesel oil
  • Preparation method of quadripolymer pour point depressant for diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Add cetyl alcohol, methacrylic acid and solvent toluene into a three-necked flask equipped with a thermometer, agitator, reflux condenser and water separator, heat the reaction system to 65°C to dissolve them all, and then add the catalyst p-Toluenesulfonic acid. Heat up the reaction system to 110°C and reflux occurs, maintain the reaction temperature at 120°C, and reflux for about 3 hours to obtain cetyl methacrylate; during this process, the chemical reactions occur as follows:

[0026]

[0027] Among them, R represents the alkyl group of sixteen carbon atoms

[0028] b. Add maleic anhydride and cetyl alcohol in turn to a three-necked flask equipped with a thermometer, agitator, reflux condenser, and water separator, add solvent toluene, heat to 60°C to dissolve them all, and then add catalyst p-toluene sulfonic acid. Heat to 110°C and reflux occurs, maintain the reaction temperature at 120°C, and reflux for about 3 hours to obtain cetyl alcohol ester of malei...

Embodiment 2

[0036] a. In a three-necked flask equipped with a thermometer, agitator, reflux condenser, and water separator, add stearyl alcohol, methacrylic acid, and solvent toluene, heat the reaction system to 60°C to dissolve them all, and then add the catalyst p-Toluenesulfonic acid. Heating and heating the reaction system to 110°C to reflux, maintaining the reaction temperature at 130°C, and refluxing for about 2 hours to obtain stearyl methacrylate;

[0037] b. Add maleic anhydride and stearyl alcohol in sequence to a three-necked flask equipped with a thermometer, agitator, reflux condenser, and water separator, add solvent toluene, heat to 60°C to dissolve them all, and then add catalyst p-toluene sulfonic acid. Heat to 110°C and reflux occurs, maintain the reaction temperature at 130°C, and reflux for about 2 hours to obtain stearyl maleic anhydride;

[0038] c. Distill the stearyl methacrylate obtained in step a under reduced pressure to remove unreacted methacrylic acid and s...

Embodiment 3

[0041]a. In a three-necked flask equipped with a thermometer, agitator, reflux condenser and water separator, add stearyl alcohol, methacrylic acid and solvent toluene, heat the reaction system to 70°C to dissolve them all, and then add the catalyst p-Toluenesulfonic acid. Heating and heating the reaction system to 110°C to reflux, maintaining the reaction temperature at 110°C, and refluxing for about 4 hours to obtain stearyl methacrylate;

[0042] b. Add maleic anhydride and stearyl alcohol in sequence to a three-necked flask equipped with a thermometer, agitator, reflux condenser, and water separator, add solvent toluene, heat to 80°C to dissolve them all, and then add catalyst p-toluene sulfonic acid. Heat to 110°C and reflux occurs, maintain the reaction temperature at 110°C, and reflux for about 4 hours to obtain stearyl maleic anhydride;

[0043] c. Distill the stearyl methacrylate obtained in step a under reduced pressure to remove unreacted methacrylic acid and solv...

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Abstract

The invention discloses a preparation method of a quadripolymer pour point depressant for diesel oil. The preparation method at least comprises steps as follows: a, in the presence of a solvent, methacrylic acid higher alcohol ester is synthesized with methacrylic acid and higher alcohol used as raw materials; b, in the presence of a solvent, maleic anhydride higher alcohol ester is synthesized with maleic anhydride and higher alcohol used as raw materials; c, in the presence of a solvent, methacrylic acid higher alcohol ester, maleic anhydride higher alcohol ester, vinyl acetate and styrene are taken as monomers, an initiator is added, and the quadripolymer pour point depressant for diesel oil is prepared, wherein the molar ratio of methacrylic acid higher alcohol ester to maleic anhydride higher alcohol ester to vinyl acetate to styrene is 4:(1.8-2.2):(2.8-3.2):(0.8-1.2). The preparation method has the benefits as follows: the quadripolymer pour point depressant is adopted to replace an existing homopolymer pour point depressant, and the pour point depression effect of the quadripolymer pour point depressant is better than that of the single-component homopolymer pour point depressant obviously.

Description

technical field [0001] The invention relates to the field of diesel pour point depressants, in particular to a preparation method of a tetrapolymer diesel pour point depressant. Background technique [0002] Low-temperature flow improver is a kind of oil additive that can improve the crystallization process of wax in diesel oil and make diesel oil flow continuously at low temperature. It is added in a small amount but has a great effect. According to its function, it can be divided into turbidity reducer, pour point depressant and anti-wax sedimentation agent. Diesel pour point depressant can effectively reduce the freezing point and cold filter point of diesel, so that diesel can meet the performance requirements of low temperature use, thereby increasing the production of diesel and improving the economic benefits of oil refining enterprises. Due to the small amount of addition, low cost and convenient operation, this method has become the first choice to solve the low te...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F218/08C08F222/14C08F212/08C10L1/196
CPCC08F220/18C08F220/1818C10L1/195C10L1/1963C10L1/1966C10L1/1973C08F218/08C08F222/145C08F212/08
Inventor 马超张立新
Owner LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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