Preparation method and application of modified vegetable oil fatty acid methyl ester
A technology of oil fatty acid methyl ester and fatty acid methyl ester, which is applied in the field of preparation of modified vegetable oil fatty acid methyl ester, can solve the problems of unsatisfactory product performance and high freezing point of the product, so as to reduce internal bonding effect, dense lubricating film, and improve The effect of lubricity
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Embodiment 1
[0026]Preparation of soybean oil fatty acid methyl ester: Add 800g soybean oil, 160g methanol, and 8g potassium hydroxide in a 2L high-pressure reactor, and carry out stirring reaction. The reaction temperature is 60°C, and the reaction time is 20min. Isolate 76g of the glycerin product in the lower layer, then wash the upper layer product 3 times with 50°C hot water, and distill the washed product for 2h at 2000Pa and 60°C to obtain fatty acid methyl ester of soybean oil with an iodine value of 125mgKOH / g. The point is -2.5°C.
[0027] Alumina-supported nickel metal catalyst: add 20g aluminum isopropoxide and 1.4g nickel nitrate hexahydrate into 100ml ethanol solvent under stirring conditions, stir for 24 hours, dry at 60°C, and heat up at a rate of 2°C / min to 600° C. and calcined for 10 hours to obtain an alumina-supported nickel catalyst.
[0028] 500g soybean oil fatty acid methyl ester, 193g 2-butenediamide, and 50g catalyst were mixed, stirred and reacted at 165°C and 3...
Embodiment 2
[0030] The same method as in Example 1 was used to prepare soybean oil fatty acid methyl ester and catalyst.
[0031] Mix 500g soybean oil fatty acid methyl ester, 131g 2-butenediamide, and 25g catalyst, stir and react at 180°C and 300r / min for 4h, and end the reaction. After the system was lowered to room temperature, the catalyst was recovered by filtration, and the pressure was 65 Pa, 200° C. under reduced pressure distillation for 2 hours to obtain the modified soybean oil fatty acid methyl ester product. The conversion rate of soybean oil fatty acid methyl ester is 49.1%, the freezing point of the product is -22.1°C, and the water layer is not turbid in the demulsibility test.
Embodiment 3
[0033] The same method as in Example 1 was used to prepare soybean oil fatty acid methyl ester and catalyst.
[0034] 500g soybean oil fatty acid methyl ester, 228g 2-butenediamide, and 100g catalyst were mixed, stirred and reacted at 150°C and 300r / min for 6h, and the reaction was terminated. After the system was lowered to room temperature, the catalyst was recovered by filtration, and the pressure was 65 Pa, 200° C. under reduced pressure distillation for 2 hours to obtain the modified soybean oil fatty acid methyl ester product. The conversion rate of soybean oil fatty acid methyl ester is 56.2%, the freezing point of the product is -25.9°C, and the water layer is not turbid in the demulsification test.
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