Application in natural product extraction
Since subcritical fluid is in a gaseous state under normal temperature and pressure conditions, subcritical fluid is easily vaporized, so it can be extracted at normal temperature or higher. Extract and separate heat-sensitive materials at low temperatures. Through practice, subcritical fluid extraction technology has been applied to the extraction of fat-soluble components of many natural products. Such as locust seeds, soapberry fruit, green thorn fruit, sea buckthorn, pistacia chinensis, tiger nut, rose, lavender, ginkgo leaf, artemisia annua, etc.
Application in the food industry
The application of subcritical fluid extraction technology in the food industry is mainly focused on the degreasing process of edible plant powder and the application of by-product oils. Due to a certain Some plant fruits themselves are rich in oil, and foods with high oil content are easily rancid and have a short shelf life. Therefore, the degreasing of plant powder has become a key link restricting the production of plant powder. Subcritical fluid extraction technology is used to remove the fat from dozens of materials such as soybeans, peanuts, walnuts, almonds, wheat germ, coffee beans, pumpkin seeds, etc., and simultaneously extract the corresponding vegetable oils. Judging from the extraction effect, the active ingredients of the plant powder obtained at low temperatures are protected to the maximum extent. Taking plant protein as an example, the water-soluble protein index NSI is above 86, and the VE component of wheat germ oil is maintained above 95. Compared with other methods, it has obvious advantages: the amount of material processed is generally 30-100 tons/day, the extraction time is short, and the cost is low. As the scope of development of natural products becomes wider and wider, subcritical fluid extraction technology has broader application prospects in the food industry.
In addition, subcritical fluid has a very good effect on extracting cream from whole milk powder. The extraction rate is above 20. The extracted cream has a pure taste and is the best method for extracting cream from milk powder (including expired milk powder). Best production process.
Application in the traditional Chinese medicine (including compound traditional Chinese medicine) industry
The application of subcritical fluid extraction in the traditional Chinese medicine industry has involved the extraction of active ingredients of traditional Chinese medicine and compound traditional Chinese medicine, and has been industrialized Production. For example, subcritical extraction from Schisandra chinensis, safflower, Ligusticum chuanxiong, Ganoderma spores, milk thistle, Trichosanthes chinensis seeds, angelica root, and Acanthopanax is superior to petroleum ether extraction. It has a larger daily processing capacity than supercritical, high yield, and long extraction cycle. It has the advantages of short length and no solvent residue, and is particularly suitable for the extraction of fat-soluble active ingredients of traditional Chinese medicine.
In addition, since the fat-soluble components in many traditional Chinese medicines have varying degrees of side effects during the production of traditional Chinese medicines, subcritical fluid extraction has great room for development in the degreasing treatment of traditional Chinese medicines before processing.
Application in animal oil extraction
In terms of animal oil extraction, Rana wood frog egg oil has been extracted from Rana wood frog eggs, and yellow powder has been extracted from Tenebrio molitor. Insect oil, silkworm pupa oil is extracted from silkworm chrysalises, scorpion oil is extracted from scorpions, and sheep hoof oil is extracted from sheep hooves.
Application in the natural pigment industry
In recent years, subcritical fluid extraction technology has made great progress in the extraction of pigments. In Hebei, Shandong, Yunnan, Xinjiang, There are more than ten subcritical fluid extraction production lines in Gansu and Jilin, mainly engaged in the production of capsicum red pigment, marigold yellow pigment, tomato red pigment, curcumin, and silkworm rice green pigment.
Application in the natural spice industry
In the natural spice industry, rose extract, coriander extract, mint extract, osmanthus extract, jasmine extract, Cocoa butter and other products.
Applications in special oils
In the production of special oils, wheat germ oil, grape seed oil, almond oil, pumpkin seed oil, linseed oil, and pomegranate seed oil have been involved , orange seed oil, cherry seed oil, sea buckthorn oil, peppercorn oil, sunflower seed oil, flax oil, green nut oil, pine nut oil, garlic oil, onion oil, ginger oil and dozens of other special oils.