Method for extracting oil from microalgae by utilizing ionic liquid
An ionic liquid and oil extraction technology, which is applied in the direction of fat oil/fat production and fat generation, can solve the problems of high cost, low extraction rate, and low extraction efficiency, and achieve the effect of easy separation and improved extraction rate
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[0024] Example 1
[0025] Take 20g of Chlorella and add it to 80g of 1-butyl-3-methylimidazole chloride ([Bmim]Cl) ionic liquid, raise the temperature to 80℃, and stir it magnetically for 3h. (Sampling is taken and analyzed under a microscope. The cell wall of the algae is completely destroyed and dissolved in the ionic liquid, and the oil is released (see figure 2 )); Add a certain amount of n-hexane to the system to extract grease (the volume ratio of n-hexane to ionic liquid is 1:3), the solution is layered, the n-hexane phase containing grease is in the upper layer, the ionic liquid phase is in the lower layer, and the upper layer solution is taken out , Normal pressure distillation to remove n-hexane to obtain 6.1g of fat, n-hexane is recycled; a certain amount of distilled water is added to the lower ionic liquid phase, the ionic liquid is dissolved in the water phase, and the microalgae cell wall dissolved in the ionic liquid precipitates Out, the water phase is removed b...
Example Embodiment
[0026] Example 2
[0027] Take 20g of Botryococcus and add it to 80g of 1-butyl-3-methylimidazole chloride ([Bmim]Cl) ionic liquid, raise the temperature to 80℃, and stir it magnetically for 3h. (Sampling is taken under a microscope for analysis. The cell wall is completely destroyed and dissolved in the ionic liquid, and the oil is released (see Figure 4 )); Add a certain amount of n-hexane to the system to extract grease (the volume ratio of n-hexane to ionic liquid is 1:1), the solution is layered, the n-hexane phase containing grease is in the upper layer, the ionic liquid phase is in the lower layer, and the upper layer solution is taken out , Normal pressure distillation to remove n-hexane to obtain 7.3g of fat, n-hexane is recycled; add a certain amount of distilled water to the lower ionic liquid phase, the ionic liquid is dissolved in the water phase, and the microalgae cell wall dissolved in the ionic liquid precipitates Out, the water phase is removed by distillation...
Example Embodiment
[0028] Example 3
[0029] Take 20g of Chlorella and add it to 80g of 1-ethyl-3-methylimidazole acetate ([Emim]CH 3 COO) in the ionic liquid, heat up to 60℃, magnetically stir for 2h; add a certain amount of n-hexane to the system to extract grease (the volume ratio of n-hexane to ionic liquid is 1:3), the solution is layered, and the n-hexane containing grease The ionic liquid phase is in the upper layer and the ionic liquid phase is in the lower layer. Take out the upper layer solution and distill at atmospheric pressure to remove the n-hexane to obtain 6.3 g of grease. , And the microalgae cell walls dissolved in the ionic liquid are precipitated, the water phase is removed by distillation, and the ionic liquid is regenerated and recycled.
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