A kind of preparation method of tetrapolymer diesel oil point depressant
A diesel pour point depressant and tetrapolymer technology, which is used in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problem that the diesel pour point depressant has a single component, an unsatisfactory pour point depressant effect, and cannot adapt to petroleum of different structures. product and other problems, to achieve good effect of pour point reduction
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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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