1, solvent leaching method

To extract oil by solvent leaching, petroleum ether, ether and n-hexane are generally used as extraction solvents. Meng Wei and others compared the extraction effects of petroleum ether, n-hexane and ethyl acetate on tea seed oil. The results showed that petroleum ether was the best extraction solvent, and the optimum extraction conditions were as follows: material-liquid ratio 1∶ 10, extraction temperature 50℃, extraction twice, each time for 3 hours, and the extraction rate was above 93%.

2. Water substitution method

The principle is to use water to replace the position of oil in oil cells, so that the oil can be released, and then the oil can be separated by centrifugal force according to the immiscible nature of water and oil and the density difference between water and oil. The optimum extraction conditions of tea oil by water substitution method are as follows: material-liquid ratio 1 ∶ 4.5, extraction temperature 75℃ and extraction time 2. 5 h, pH 9. 0. The extraction rate is as high as 90. 19%.

3. Supercritical extraction method

Supercritical fluid extraction technology generally chooses CO2 as the extraction gas, which can effectively separate, extract and purify the matrix from the extract. Carbon dioxide is safe, non-toxic, cheap and widely available. The optimum extraction process of tea oil is as follows: extraction gas is CO2, extraction pressure is 28 MPa, extraction temperature is 42℃, extraction time is 3 min, and the highest extraction rate is 96. 8%.

Tea seed oil, also known as tea seed oil, camellia oil and wild camellia oil, is one of the traditional edible oils in China. Its biggest feature is that its fatty acid composition is very close to that of olive oil, so it is also called "Oriental olive oil".

The data showed that the fatty acid content in tea seed oil was 74%~87% oleic acid, 7%~ 14% linoleic acid and 7% ~1%saturated fatty acid. Its characteristic is that the content of monounsaturated fatty acid (oleic acid) even exceeds that of olive oil, but the content of ω-3 polyunsaturated fatty acid (linolenic acid) is very low.

Extended data

Seeding and seedling raising of Camellia oleifera can be carried out in winter and spring, and it is more suitable to use drilling method. Generally, paddy soil, heavy clay and alkaline reactive soil are not suitable for the growth of Camellia oleifera. It is best to choose the distribution area of slightly acidic soil with flat terrain, shelter from the wind and the sun, fertile texture and good water retention and drainage performance.

Prepare the seedbed before sowing, apply sufficient base fertilizer, and then cover with a layer of fine fertile soil and a layer of thin grass after sowing to keep the soil moist, so that the seeds can germinate and emerge as soon as possible. When the seeds germinate and are unearthed, it is necessary to uncover the thin grass on cloudy days or in the evening, and weed and loosen the soil in time.

People's Network-Tea Seed Oil, Oriental Olive Oil

Baidu encyclopedia-camellia seed