Extraction of Camellia Seed Oil
In the production process of camellia seed oil, how to retain the effective active substances in the oil and the beneficial micronutrients in the oil that have not yet been proven in the oil is a technical problem in the production process of camellia seed oil.
Over-refining of fats and ignoring the nutrition and functions of fat companions are a major misunderstanding in the field of edible oil nutrition and consumption in my country. Edible oil production should promote the concept of refined preparation and moderate refining. The entire production process should maintain fatty acids and The natural state of glyceride ingredients.
Squeezing and leaching extraction method
For a long time, two methods of pressing and leaching have been used in the production of camellia seed oil. Although these two methods have formed relatively mature technologies, they will destroy nutrients and fatty acids in the process of making them. Cause the oil to have many impurities, bitter taste and other harmful substances
Residues, etc., have hindered the entry of camellia seed oil into the high-end market. Without refining, it is difficult to meet the edible oil standards, and it is even more difficult to meet the application requirements of the pharmaceutical and cosmetic industries.
If it is refined, the sensory properties such as the unique flavor of the camellia seed oil will be lost, and the nutritional function of the fat companion will be destroyed.
Therefore, the traditional oil squeezing and refining process restricts the further development and application of camellia seed oil.
Supercritical CO2 extraction method
Research the use of inert gas carbon dioxide to prepare camellia seed oil in a supercritical state, and separate it from the oil in the gas phase. The entire preparation process is easy to operate, high in extraction rate, low in gum content, and light in color. In addition to free fatty acids, the refining processes such as oil degumming, deacidification, and decolorization are omitted to avoid interference with the nutrition and functions of fatty acids and fat companions, and high-quality, high-value camellia seed oil can be obtained.
Such a camellia seed oil can be used not only as food, but also for medical treatment and cosmetics, which broadens the value of the product.
Supercritical CO2 extraction method of camellia seed oil
Using supercritical CO2 to extract camellia seeds to produce camellia seed oil, the research determined that the more suitable technological conditions are:
The extraction pressure is 35-40 MPa, the extraction temperature is 30 ℃, the pressure of the separation vessel I is 8-11 MPa, the temperature is 55-75 ℃, the temperature of the separation vessel II is 25-40 ℃, the feed volume is 70 kg, and the extraction time is 90-120 min.
Prospect of supercritical CO2 extraction of camellia seed oil
Compared with traditional pressed oil, the supercritical CO2 extracted camellia seed oil not only has good product quality and high economic value, but more importantly, it has broad market development prospects.
At present, supercritical extraction technology has not made great progress in the field of oil production. The main reason is that the production energy consumption is relatively high, and there are still certain difficulties in continuous production.
Therefore, the supercritical CO2 extraction technology is more suitable for the extraction of high value-added camellia seed oil, spice oil, and precious rare oils.
Advantages of supercritical CO2 extraction of camellia seed oil
Camellia seed oil is rich in physiologically active substances such as camellia glycosides, camellia saponins, tea polyphenols, and squalene. The content of oleic acid is as high as 74% to 87%.
The use of supercritical extraction technology to prepare camellia seed oil, the oil yield is more than 10% higher than that of traditional hydraulic pressing, the quality is good, no refining is required, the nutrition and functions of the fat companion in the camellia seed oil are better retained, and the fatty acids and glycerin are maintained Natural state.
The camellia seed oil extracted by supercritical CO2 can be widely used in food, cosmetics and medical health products, broadening its economic value.