Method for extracting and separating ginger essential oil and ginger oil resin enriched in gingerol

Abstract

The invention relates to a biochemical engineering separating method of natural active products, and especially relates to a method for simultaneously extracting and separating ginger essential oil and ginger oil resin enriched in gingerol in ginger by a supercritical carbon dioxide fluid. The method is characterized in that the pressure and temperature of an extraction kettle is changed, the ginger essential oil containing little 6-gingerol and 6-gingerol-enriched ginger oil resin with large appearance and property difference can be obtained in a separation kettle in different extraction and separation phases. The method uses a separation kettle, the process flow is simple, two important extraction products such as ginger essential oil and ginger oil resin in ginger can be used in the fields of food, cosmetic, medicine and the like and clearly obtained at a time, the investment for equipments and workshops is small, and the large scale production can be carried out.

Description

1. Technical field [0001] The invention relates to the field of biochemical industry, in particular to a technology for extracting and separating ginger essential oil and gingerol-rich ginger oleoresin from ginger, a medicinal and edible plant. 2. Technical Background [0002] Ginger is the rhizome of ginger (Zingiber officinale Rosc.), a plant belonging to the ginger family Zingiber officinale Rosc. Traditional Chinese medicine believes that ginger is pungent and hot; it belongs to the spleen, stomach, heart, and lung meridians, and has the functions of warming the middle and dispelling cold, returning to the yang and dredging the veins, drying dampness and eliminating phlegm. It is used for cold and pain in the abdomen, vomiting and diarrhea, cold extremities and weak pulse, phlegm retention, dyspnea and cough embolism. Modern pharmacological research shows that ginger has antipyretic, analgesic, anti-inflammatory, anti-heart failure, antibacterial and anti-inflammatory pro...

AI Technical Summary

Problems solved by technology

[0008] Chinese patents CN1212273, CN1762956, CN1692924, CN101955423 have all mentioned the use of supercritical CO 2 Extract ginger oil or ginger oleoresin with higher gingerol content, but all of them are extracted and separated at one time, and the extracted product is obtained in an analysis kettle or a separation kettle, which fails to fully reflect the supercritical CO 2 Fluid extraction techniques can be achieved by simply changing the supercritical CO 2 Fluid pressure and temperature (extraction or separation) to change supercritical CO 2 The density of the fluid affects the volatility of the solute in it, thereby affecting the solute in supercritical CO 2 Solubility in fluids, technical advantages or characteristics to achieve selective extraction, separation or enrichment

Although Chinese patent CN1857701 has mentioned two-stage separation and analysis, but from its claim, the narration of embodiment, it is not much different from the aforementioned several patents; Chinese patent CN1251367 understands and utilizes supercritical CO 2 The above-mentioned characteristics of fluid extraction technology, through the application of two or more to four-stage separators, adjust the temperature or pressure of each separator, to achieve the purpose of obtaining different ginger extracts in different separators, such as ginger essential oil, gingerol and Waxy, etc., but the patent does not clarify the differences in properties and main characteristic components between different extracts, which is not conducive to the practical application of the extracted products. More importantly, due to the high-pressure process, the use of secondary or higher separators Increased and complicated the process route process, greatly increased the equipment investment and the floor area of ​​the equipment workshop

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