A kind of low-sulfur diesel lubricity improver and preparation method thereof
A low-sulfur diesel oil and lubricating technology, which is applied in the field of biodiesel, can solve the problems of high freezing point of the product and unsatisfactory product performance, and achieve the effects of broadening the source of raw materials, avoiding side reactions of transesterification, and reducing the reaction temperature
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Embodiment 1
[0029] 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.
[0030]Add 176g 2-butene-1,4-diol, 500g tung oil methyl ester, 250g 1-butyl-3-methylimidazolium tetrafluoroborate into the reactor, control the reaction temperature to 50°C, and stir After 9 hours of constant temperature reaction under the condition, the reaction was terminated. After the system is cooled down to room temperature, the reaction system is left to stand and stratified. The lower layer is an ionic liquid, which can be recycled and reused; the upper layer is distilled under reduced pressure at 200°C for 2 hours at a pressure of 65 Pa t...
Embodiment 2
[0032] Add 120g 2-butene-1,4-diol, 500g tung oil methyl ester, 100g 1-butyl-3-methylimidazolium tetrafluoroborate into the reactor, control the reaction temperature to 40°C, and stir After 10 h of constant temperature reaction under the condition, the reaction was terminated. After the system is cooled down to room temperature, the reaction system is left to stand and stratified. The lower layer is an ionic liquid, which can be recycled and reused; the upper layer is distilled under reduced pressure at 200°C for 2 hours at a pressure of 65 Pa to obtain a lubricity improver product. The reaction molecule conversion rate was 57.0%, the freezing point was -26.4°C, and the water layer was not turbid in the demulsification test.
Embodiment 3
[0034] Add 301g 2-butene-1,4-diol, 500g tung oil methyl ester, 500g 1-butyl-3-methylimidazolium tetrafluoroborate into the reactor, control the reaction temperature to 60°C, and stir After 8 hours of constant temperature reaction under the condition, the reaction was terminated. After the system is cooled down to room temperature, the reaction system is left to stand and stratified. The lower layer is an ionic liquid, which can be recycled and reused; the upper layer is distilled under reduced pressure at 200°C for 2 hours at a pressure of 65 Pa to obtain a lubricity improver product. The reaction molecular conversion rate was 64.7%, the freezing point was -26.7°C, and the water layer was not turbid in the demulsification test.
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