Low-sulfur diesel oil modifier, preparation method and application thereof
A low-sulfur diesel and modifier technology, which is used in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems that the product performance cannot meet the requirements and the high freezing point of the product, and achieves widening the source of raw materials, dense lubricating film, The effect of increasing the entanglement density
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Embodiment 1
[0032] Preparation of tung oil methyl ester: Add 800g tung oil, 160g methanol, and 8g potassium hydroxide into a 2L high-pressure reactor, and carry out stirring reaction. The reaction temperature is 60°C, and the reaction time is 20min. Glycerin product 76.2g, then the upper layer product was washed 3 times with 50°C hot water, and the washed product was distilled at 2000Pa and 60°C for 2h to obtain tung oil methyl ester biodiesel.
[0033] 146g of 1,4-diamino-2-butene was added into the autoclave, carbon dioxide was introduced into the autoclave to make the carbon dioxide supercritical, the pressure was controlled at 10.5MPa, the temperature was 45°C, and the stirring was started. Gradually add 500 g of tung oil methyl ester biodiesel to the reactor, so that the addition of tung oil methyl ester biodiesel is completed within 2 hours, and the reaction is continued for 4 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is redu...
Embodiment 2
[0035] Add 99g of 1,4-diamino-2-butene into the autoclave, and introduce carbon dioxide into the autoclave to make the carbon dioxide supercritical, control the pressure to 13.5MPa, the temperature to 60°C, and start stirring. Gradually add 500 g of tung oil methyl ester biodiesel to the reactor, so that the addition of tung oil methyl ester biodiesel is completed within 1 hour, and continue to react for 3 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is reduced to normal pressure, and the supercritical carbon dioxide is converted into ordinary gas phase carbon dioxide, which is collected and reused after being discharged. The product was distilled under reduced pressure at 200°C for 2 hours at a pressure of 65 Pa to obtain a low-sulfur diesel modifier product. The reaction molecule conversion rate was 77.4%, the freezing point was -20.6°C, and the water layer was not turbid in the demulsification test.
Embodiment 3
[0037] 292g of 1,4-diamino-2-butene was added into the autoclave, carbon dioxide was introduced into the autoclave to make the carbon dioxide supercritical, the pressure was controlled at 7.5MPa, the temperature was 32°C, and stirring was started. Gradually add 500 g of tung oil methyl ester biodiesel to the reactor, so that the addition of tung oil methyl ester biodiesel is completed within 3 hours, and the reaction is continued for 5 hours to end the reaction. The reaction system is passed into the expansion separator, the pressure is reduced to normal pressure, and the supercritical carbon dioxide is converted into ordinary gas phase carbon dioxide, which is collected and reused after being discharged. The product was distilled under reduced pressure at 200°C for 2 hours at a pressure of 65 Pa to obtain a low-sulfur diesel modifier product. The molecular conversion rate of the reaction was 78.6%, the freezing point of the product was -22.8°C, and the water layer was not tur...
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