Linseed oil and supercritical CO2 extraction method thereof

Abstract

The invention discloses linseed oil and a supercritical CO2 extraction method thereof. Linseed of alpine regions of northern China is chosen as a raw material and subjected to supercritical CO2 extraction by taking a linolenic acid content as a measurement index. With the adoption of response surface Box-Behnken design, the effects of factors such as extraction pressure, extraction temperature and extraction time on an extraction rate of the linseed oil are researched, a mathematical model and optimal process parameters of the supercritical CO2 extraction linseed oil are obtained, the oil extraction rate is greater than 35%, the linolenic acid content is greater than 50%, and the obtained product is high in yield, good in quality, and extensive in application, and can be eaten directlyor added into food and medicine to strengthen a healthy function.

Description

technical field [0001] The present invention selects linseed in the alpine region of northern China as a raw material, and uses the content of linolenic acid as a measurement index to carry out supercritical CO 2 Extracting and preparing a linseed oil with good yield and high quality belongs to the field of food engineering. Background technique [0002] In my country, flax planting has a long history, and flax varieties are rich and diverse. Flax for oil is widely planted in the alpine mountainous areas of northern China—Chengde, Zhangjiakou, etc., with large yields and high seed oil content, up to 38%. Flaxseed is rich in α-linolenic acid. As a kind of essential fatty acid for human body, α-linolenic acid can not only synthesize DHA and EPA, but also lower blood pressure, enhance immune function, prevent cardiovascular and cerebrovascular diseases and protect eyesight. Flaxseed oil has a wide range of uses and can be used as a donor of health care ingredients, added to c...

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Problems solved by technology

[0004] In previous studies on linseed oil, the publication number is CN 102827684 A "A method for extracting linseed oil by extruding water enzymatically", The linseed oil is obtained by extruding and expanding with water enzymatic method; in the "Green Processing Method of Linseed Supercritical CO2 Extraction" with the publication number CN 1397632A, supercritical CO2Extraction and decompression separation of linseed oil, the yield of the product is high, but the functional components such as unsaturated fatty acids in the product have not been measured, and the product quality cannot be measured; the publication number is CN 102978009 A patent "a preparation of linseed oil In the "method", 0.8~1.5mol / L NaOH ethanol solution was used for extraction, although the oil extraction rate was improved, but only 21%; Zhang Peiyi et al. used flaxseed in Shanxi to conduct supercritical CO Extraction, the mathematical model was obtained by using the response surface method, but the main component in the linseed oil - unsaturated fatty acid was not studied in the research, the product quality could not be effectively guaranteed, and the availability of the results was reduced