Method and device for extracting tomato seed oil from tomato seeds

Abstract

The invention relates to a method for extracting grease from oil material, in particular to a method for extracting tomato seed oil from tomato seeds. The method for extracting tomato seed oil from tomato seeds is characterized by comprising the following steps of: (1) firstly, drying the tomato 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 tomato seeds into an extracting kettle, pumping the vacuum to the pressure below to 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 tomato 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 40-45DEG C, and the extraction time is 40-50min 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 45-50DEG C; and (6) after subcritical extraction, centrifugally separating and filtering the crude oil through a high-speed centrifuge to obtain the final tomato seed oil.

Description

Technical field: [0001] The invention relates to a method for extracting oil from oil plants, in particular to a method for extracting tomato seed oil from tomato seeds. Background technique: [0002] Tomato (tomato) is also known as tomato and foreign persimmon. The fruit is rich in nutrition and has a special flavor. It can be eaten raw, cooked, processed into tomato sauce, juice or canned as a whole fruit. Tomato is one of the most commonly cultivated fruits and vegetables in the world. The United States, Italy and China are the main producing countries. my country is the third largest tomato producing country after the United States and Italy. Tomato production accounts for about 20% of the world's total. The annual processing About 2 million tons of fresh tomatoes, 120,000 tons of tomato paste, and 50,000 tons of tomato seeds (in dry form). Tomato seed is one of the main components in the waste residue after tomato paste processing, and it is also an available resource...

AI Technical Summary

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

Supercritical CO 2 Due to the high cost of equipment design and manufacturing and operating costs for extracting 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. The production cost of such products with low added value is too high, so it is not suitable to process bulk raw materials such as tomato seeds in industrial production

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