Method for extracting radix angelicae dahuricae volatile oil through subcritical fluid technique

Abstract

The invention discloses a method for extracting radix angelicae dahuricae volatile oil through a subcritical fluid technique. The method for preparing the radix angelicae dahuricae volatile oil through subcritical fluid is performed under an intermediate temperature condition, so that the active material of the medicine is not damaged; the problems of inactivation and metamorphism of the volatile oil caused by high temperature are solved; the reutilization of the solvent can be realized; the use ratio of the raw materials is increased; the energy consumption is reduced; the production period is shortened; the method is fit for industrial production.

Description

technical field [0001] The invention belongs to the technical field of traditional Chinese medicine extraction technology, and in particular relates to a method for extracting volatile oil of Yu Baizhi by subcritical fluid technology. Background technique [0002] Baizhi is the dried root of Angelica dahurica or Hangbaizhi, one of the commonly used clinical medicines in traditional Chinese medicine. It was first recorded in "Shen Nong's Herbal Classic". It is warm in nature and pungent in taste. The effects of eliminating sores, hemostasis, and beautifying are used to treat colds, headaches, brow bone pain, nasal sinusitis, toothache, sores, swelling and pain, etc. Studies have shown that Angelica dahurica has anti-inflammatory, antipyretic, analgesic, and anti-pathogenic microorganisms. It can inhibit psoriasis, treat vitiligo, antagonize parasympathetic nerves, relieve spasm and relieve pain, etc. Commercial Angelica dahurica mainly includes Qi Baizhi, Yu Baizhi, Hang Baiz...

AI Technical Summary

Problems solved by technology

[0004] The extraction method of the volatile oil of Angelica dahurica is relatively simple, and now most of them use two extraction methods, steam distillation and supercritical carbon dioxide method. The application of steam distillation is more common. The content of active ingredients is also high, but with this method, the medicinal material of Angelica dahurica is very easy to gelatinize, which is not conducive to operation, and the volatile oil will gradually oxidize and deteriorate when exposed to air and light for a long time, forming a resinous substance, and the yield is low. Critical carbon dioxide extraction technology has the advantages of good time, high efficiency, low operating temperature, and a large amount of active ingredients of medicinal materials can be preserved, but it cannot be effectively used for some volatile components with high polarity or volatile oils that exist in a combined state and low boiling point Extraction, and this technology has higher requirements on equipment, and it is still difficult to popularize at present. In view of this, the purpose of the present invention is to address the deficiencies in the prior art and provide a method for preparing Angelica dahurica volatile oil using subcritical fluid technology. As an advanced extraction technology, fluid technology has the advantages of low energy consumption, less damage to volatile oils, and recycling of organic solvents. It will be more and more widely used in the extraction of volatile oils.