Method and device for extracting olive pomace oil from olive pomace

Abstract

The invention relates to a method for extracting grease from oil seeds, in particular to a method for extracting and recycling olive pomace oil from olive pomace. The method is characterized by comprising the following steps of: (1) drying the olive pomace until the water content is less than 13%, and crushing to 40-80 meshes by a crusher; (2) putting the dried and crushed olive pomace into an extraction kettle, vacuumizing until the pressure is less than 1*10<4>pa, and discharging air in the extraction kettle; (3) injecting a tetrafluoroethane solution into the extraction kettle by a plunger pump until the level of the solution submerges raw materials of the olive pomace by using a sight glass for observation; (4) starting stirring and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature is 40-50 DEG C, and the extraction time is 45min; (5) decompressing, raising temperature, evaporating and separating in a separation kettle, wherein the extraction pressure is 0.1-0.5Mpa, and the temperature is 40-50 DEG C; and (6) after subcritical extraction, centrifuging to separate crude oil by a high-speed centrifuge, and filtering to obtain the final olive pomace oil.

Description

Technical field: [0001] The invention relates to a method for extracting and recovering oil from oil plants, in particular to a method for extracting olive pomace oil from olive pomace. Background technique: [0002] Olive (Olea europea L) is a fast-growing, high-yielding, long-lived woody oil tree species with high fruit oil content. Olive oil is a vegetable oil extracted from the fresh fruit of olive. It has high nutritional value and is called "the queen of vegetable oil". Olive oil is rich in natural nutrients such as fat-soluble multivitamins, carotene, squalene and various trace elements. The unsaturated fatty acid in the oil reaches 82% to 87%. Features, its digestion and absorption rate by the human body reaches 93.4%. It has a variety of health effects on the human body, especially for reducing cardiovascular diseases, promoting the development of children's bones and nervous systems, and strengthening the skin. It is widely used in food, daily chemicals, field of...

AI Technical Summary

Problems solved by technology

The physical method is commonly used to extract the olive pomace. Since the oil content in the olive pomace is only 8%, the extraction rate is extremely low when the olive pomace is re-extracted by the pressing method; the chemical method usually uses an organic solvent to extract oil, and the commonly used organic solvents are ether, Petroleum ether, n-hexane, etc. are flammable and explosive solvents, and the production safety is poor, and there are solvent residues in the product, which affects its quality and quality, and also affects its application. Both methods have obvious shortcomings.

Supercritical CO 2 Due to the high cost of equipment design and manufacturing and operating costs for extracting vegetable oils, at present, only 3000L supercritical extraction equipment can be produced in China, and the amount of raw materials processed is limited. It is mainly used to extract some high value-added products, such as olive pomace oil. The production cost of lower products is too high, so it is not suitable for industrial production

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