The technology was created by Qi Kun,an expert of Henan Sub-critical Company in 1989.The small and medium test studies were the key projects of science and technology in Henan in that year,and the demonstration project of production technology was the"Torch"project of the Ministry of Science and Technology in that year.After 30 years of development,the company has carried out research and application in the fields of plant oil,plant essential oil,plant pigment,Chinese herbal medicine and plant protein,and established more than 100 sets of production lines and scientific research equipment.It is a kind of low temperature,low pressure and high efficiency physical method,which can avoid the thermal denaturation problem in the extraction process of biological components and keep the biological activity of the extracted components.Avoid harmful substances such as trans-fatty acids,glycidyl ester and trichloropropanol ester produced by heating in the extraction of vegetable oils.To ensure that plant essential oil extraction in the complete components,pure taste.To ensure that the active ingredients used in the extraction of Chinese herbal medicine are invariant.Ensure that the plant protein is not heat denaturation,plant starch is not denaturation gelatinization.
The extractive solvent exists in a liquefied state under a certain pressure in the temperature range above its boiling point but below the critical point,which is defined as the subcritical state of the solvent.The extraction of biological components with a medium with a boiling point below 0℃as a solvent is a cryogenic subcritical extraction process.Propane,butane,dimethyl ether and tetrafluoroethane are the most commonly used subcritical extraction solvents.However,conventional extraction solvents,such as ethanol,hexane and water,are extracted at liquid temperature lower than their boiling point.The heating process of removing solvent from the extract not only causes the thermal damage of the extract,but also causes the loss of volatile essential oil components.Conventional extraction process is a physical method with high temperature,atmospheric pressure and high efficiency.On the other hand,supercritical CO2 extraction is a physical method of low temperature,ultra-high pressure and low efficiency,sometimes accompanied by the chemical action of carbonic acid,which is taboo for extraction.
Subcritical extraction has been test research and production of more than 200 kinds of raw materials,such as tea seed,the peony seed,walnut oil,grape seed,Sally beans,crown fruit,flax seed,acer truncatum seeds,pine nuts,such as oil extraction plant,such as roses,aloes,Chinese prickly ash,ginger volatile oil extraction plant,etc.,marigold,chili peppers and other plant pigment extraction,fructus schisandrae,eucommia seed extract of Chinese herbal medicine components,such as ganoderma lucidum spores,microorganisms such as fungi,oil extraction,and so on.Our company can provide turnkey project complete sets of equipment.The company's production demonstration base has a sub-critical extraction production demonstration line with a daily processing capacity of 80 tons,which can provide batch processing service.The research institute of the company can cooperate to carry out sub-critical extraction technology research for customers'raw materials,and develop new products of plant extracts for customers.
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