Silybum marianum oil production line

Silybum marianum oil is made from Silybum marianum of the Compositae family Silybum marianum after cold pressing and filtration.

　　1 production process of oil press workshop

Due to the relatively small scale of production, and in order to fully retain the silymarin in the cake, under the premise of ensuring high oil yield and product quality, the oil production process is based on the principle of shortening the process as much as possible and reducing thermal changes. Press cold pressing method. The process flow is as follows:

　　Silybum marianum first removes sand, cinder, mud, dust, crust and ferromagnetic impurities from the sieve de-stone combination machine and magnetic separator, and then softens it. The softening temperature should be controlled at about 60℃. Too high temperature will destroy the silymarin in it, while too low temperature will not achieve the purpose of softening. Therefore, the control of softening temperature is very important.

　　The softened raw materials are sent to the first press for squeezing, and the resulting cake is then squeezed for the second time. The crude oil obtained from the two squeezing is filtered through precipitation and sent to refining. After crushing the pressed cake, go to the plant to extract silymarin.

　　2.2 Refining workshop production process

After 　　 crude oil is refined, both oil and high-grade cooking oil can be obtained. The process flow of producing advanced cooking oil is as follows:

　　 According to the acid value of the crude oil, prepare the required concentration of lye. Stir the oil in the caustic refining pot and raise the temperature to about 45°C and start adding the prepared lye, continue to keep the temperature and stir for 20min-60min, when the oil and soap particles are separated, at a speed of 1°C/min～1.5°C/min Heat to 60℃～70℃ and continue to stir for 10min. When the oil soap obviously begins to separate, stop stirring, let it settle for 6h-8h, release the lower oily feet, and transfer to the washing pot for washing. The amount of water added is 10% to 15% of the oil weight, and the temperature is 85°C to 90°C, washed with water for 2 to 3 times, and then decolorized. The decolorization temperature is 90℃～105℃, the amount of clay added is 2%～5% of the oil weight, the time is about 30min, and the vacuum degree is kept at about 96kPa. After the decolorizing oil is filtered by the plate and frame filter to remove the white soil, it is deodorized in the deodorizing pot, and the heating source is heat transfer oil. When the temperature rises to about 150°C, direct steam is injected, and the amount of direct steam injected should not cause grease splash. The deodorizing temperature is 210℃～240℃, the time is 2.5h～4h, and the residual pressure in the pot is kept at 0.53kPa.

　　 After the deodorization is over, put the oil in a cooler to cool, then filter, and then pump into the product oil tank. The refining production process can be adjusted according to specific conditions to meet the requirements of producing oil or high-grade cooking oil.

　　3 Conclusion

　　3.1 This process has short production lines, simple equipment matching, simple operation and low investment.

　　3.2 The pressed cake of this process retains the silymarin in the raw materials to a limited extent, which provides good conditions for the extraction of silymarin.

　　 The oil contained in the 3.3 cake is separated in the extraction workshop to minimize the oil loss.

　　3.4 After the milk thistle seeds are made into oil and refined, the residue contains 36.4% starch and 23% protein, which can be used as animal feed.

　　3.5 Milk thistle oil is a worthy edible health oil