Soja bean germs oil production technique by supercritical carbon dioxide extraction

Abstract

The invention relates to a production technique for extracting soybean germ oil by supercritical carbon dioxide. The soybean germs with good purity quotient is dried at the temperature of 90-120 DEG C until the weight is constant, crushed and sifted for 20-50 meshes, the sifted powder is put into an extraction kettle by virtue of using a shelf; the temperature of the extraction kettle is adjusted to 35-40 DEG C; a CO2 storage steel bottle is opened after a condenser is opened up, an air compressor is not started until the pressure of the steel bottle is equal to the pressure in the extraction kettle, the CO2 is pressurized by the air compressor so as to ensure the pressure to reach the extraction pressure of 15MPa-35MPa; the air compressor is stopped, after the dynamic extraction for 1h-2h, the CO2 and the extracted products are released to a product collector; under the normal temperature and pressure, the CO2 volatilizes and is separated from the products. The invention can remove a majority of phospholipid and non-esterified fatty acid, thereby saving degumming and deacidification and obtaining the soybean germ oil with high quality and yield coefficient; the obtained soybean germ oil has high unsaturated fatty acid content and good nutrient value, and simultaneously the organic solvent is not used during the extraction process, thereby causing no pollution and protecting environment; the production technique has the advantages of short extraction time, low energy consumption and high quality of the produced soybean germ oil.

Description

technical field [0001] The present invention relates to a kind of supercritical CO 2 Extraction of soybean germ oil production process. Background technique [0002] At present, the techniques for extracting soybean germ oil from soybean germ include pressing method, traditional solvent leaching method, Soxhlet extraction method, two-liquid phase extraction method, ultrasonic enhanced extraction method, etc. The pressing method generally uses a screw press, which is suitable for small batch production and has a low oil yield. In order to ensure a high oil yield, the pressure of the oil press must be above 69MPa. (References: Ma Chuanguo, Wang Guangrun, Wang Qunxue, Xiao Xuejun. Research on the preparation process of aromatic soybean oil. China Oils and Oils, 2004, 29(4): 20-22.) The traditional solvent extraction method generally uses No. 6 solvent oil, which is suitable for large Batch continuous leaching, but there is often the problem of organic solvent residue. (Refer...

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Problems solved by technology

At present, this method has been applied to the extraction of wheat germ oil and corn germ oil, but regarding supercritical CO 2 The extraction process parameters of soybean germ oil extracted by extraction method, the extraction process is rarely reported in the article