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
Inactive Publication Date: 2012-07-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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The invention relates to a method for extracting oil from microalgae by utilizing ionic liquid, which comprises the following steps of: 1) preparing functionalized ionic liquid; 2) adding a certain quantity of microalgae into the ionic liquid and magnetically agitating through heating to dissolve the microalgae; 3) extracting oil in an ionic liquid mixture by using an organic solvent; and 4) adding a certain quantity of water into an ionic liquid phase after the oil is extracted, removing a water phase through evaporation, realizing the regeneration of the ionic liquid and reusing the ionic liquid. According to the method, the ionic liquid is utilized to dissolve the microalgae so as to extract the oil, almost has no vapor pressure and has the characteristics of greenness, environment friendliness and the designability; the cell wall of a microalgae can be remarkably damaged to release oil in a microalgae cell or on the cell wall; the oil is easily separated from the ionic liquid, so that the extraction rate of the oil can be remarkably improved; and the ionic liquid can be recycled through a water dilution method. The method can become a new process for microalgae oil extraction.
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