Method and device for extracting peony seed oil from peony seeds

Abstract

The invention relates to a method for extracting grease from oil material, in particular to a method for extracting peony seed oil from peony seeds. The method for extracting peony seed oil from peony seeds is characterized by comprising the following steps of: (1) firstly, drying the peony seeds until the water content is smaller than 13%, and crushing to 40-80 meshes by using a crusher; (2) delivering the dried and crushed peony seeds into an extracting kettle, pumping the vacuum to the pressure below 1*10<4>Pa, and evacuating air in the extracting kettle; (3) then, pumping a tetrafluoroethane solution into the extracting kettle by using a plunger pump until the peony seeds are emerged under the liquid level under the observation of a sight glass; (4) stirring, and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature range is 40-50 DEG C, and the extraction time is 30-45 min each time; (5) depressurizing and raising temperature to evaporate and separate in a separating kettle, wherein the separation pressure range is 0.5-0.1MPa, and the temperature range is 45-50 DEG C; (6) after subcritical extraction, centrifugally separating and filtering the crude oil through a high-speed centrifuge to obtain the final peony seed oil.

Description

Method and device for extracting peony seed oil from peony seeds Technical field: The invention relates to a method for extracting oil from oil plants, in particular to a method for extracting peony seed oil from peony seeds. Background technique: Peony is a deciduous shrub belonging to the genus Paeoniae in the family Ranunculaceae. It is widely distributed in Henan, Shandong, Anhui, Shaanxi, Sichuan, Zhejiang and other places, especially in Luoyang and Heze. The national planting area of ​​peony is about 200,000 mu, and the annual output of peony seeds is as high as about 30,000 tons. Peony seeds have a high oil yield. Peony seeds contain more than 30% oil. Peony seed oil is rich in unsaturated fatty acids, with linolenic acid content of 58% and linoleic acid content of 28%. Unsaturated fatty acid is a kind of fatty acid that constitutes the fat in the human body. It is an essential fatty acid for the human body. The human body cannot synthesize linoleic acid and linole...

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Problems solved by technology

The physical method is commonly used to extract by pressing. The pressing method uses mechanical force to squeeze the embryo to produce oil. The process route is simple, and the product is easily polluted during the production process. It contains many impurities, microorganisms and heavy metals are easy to exceed the standard, and the oil yield is low. The amount of residual oil in oil residue is high; chemical methods usually use organic solvents to extract oil, and the commonly used organic solvents are ether, petroleum ether, n-hexane, etc., because the solvents are flammable and explosive, the production safety is poor, and the product has solvent residues, which affects its quality and quality, which also affects its application, both methods have obvious disadvantages

Due to the high cost of equipment design and manufacturing and operating costs for supercritical CO2 extraction of vegetable oils, only 3000L supercritical extraction equipment can be produced in China at present. The amount of raw materials to be processed is limited and the production cost is high. It is mainly used to extract some high value-added products. It is not suitable for processing bulk raw materials in industrial production

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