Method for extracting ginger gingerol

Abstract

The invention discloses a method for extracting ginger gingerol. The method comprises the following steps: adding water into ginger for grinding, and squeezing to separate ginger dregs to obtain ginger juice; adjusting the pH value of the ginger juice to 4 to 6, then adding a light metal salt solution into the ginger juice, carrying out uniform mixing to obtain a mixed solution, slowly heating the mixed solution, stopping heating till the mixed solution is boiled, standing and settling, and filtering to obtain precipitates which are gingerol coarse products; and adding an organic solvent into the gingerol coarse products, carrying out extraction for 1 to 3 times, mixing extracting solutions, carrying out decompression distillation, and carrying out recycling to obtain the gingerol. According to the method disclosed by the invention, the gingerol coarse products are separated by settling; the separation speed is high, and the quantity of the precipitates is large; furthermore, the quality of the precipitates is high, and the precipitates still can keep the original active state; and when the gingerol coarse products are returned into the ginger juice, the ginger juice still has the original taste. Compared with the conventional extraction method, the method has the advantage that the use amount is reduced by 80 percent or above.

Description

technical field [0001] The invention relates to the field of extraction of biological raw materials, in particular to a method for extracting gingerol from ginger. Background technique [0002] Ginger is the fresh rhizome of the perennial herb ginger (Zingiber officinale Roscoe) of the monocot Zingiberaceae. Ginger is a perennial herb that is cultivated as an annual. The rhizome is hypertrophic and contains volatile oil. The rhizome of ginger (dried ginger) has a pungent taste and is used as a vegetable, spice and medicine. Warm in nature, its unique "gingerol" can stimulate the gastrointestinal mucosa, make the gastrointestinal congestion, and enhance digestion. It can effectively treat abdominal distension, abdominal pain, diarrhea, vomiting, etc. caused by eating too much cold and cool food. Oxidative, anti-allergic, and cholesterol-lowering effects in blood and liver. [0003] At present, there are many methods for extracting gingerol from ginger, mainly including wate...

AI Technical Summary

Problems solved by technology

[0004] 1) The water boiling method takes a long time and consumes more energy. Due to prolonged heating, the active ingredients are more damaged, so the product quality is poor;

[0005] 2) Column chromatography is difficult to be used in mass production due to the limitation of eluent and elution volume;

[0006] 3) The organic solvent extraction method extracts gingerol according to the principle of similar miscibility, because the solubility of the solvent is limited, in order to improve the extraction rate, the main method is to increase the amount of solvent. As the amount of solvent increases, the consumption also increases , the cost will inevitably rise, so the economic benefits often show negative growth, and it cannot be put into production, and can only stay in the experimental stage of the laboratory; such as absolute ethanol to extract gingerol, the extraction rate of gingerol increases with the amount of absolute ethanol increase and slowly improve, so the extraction rate of gingerol often increases, but at the same time, the loss of absolute ethanol also increases significantly. In addition, the process is longer, so the energy consumption is more, the solvent loss increases, and the production cost rises. The final economic benefits usually show negative growth, and cannot be put into production, but can only stay in the laboratory;

[0007] 4) Physical methods can be divided into three types: freezing method, microwave method and ultrasonic method according to different processing methods; these three methods can play a certain auxiliary role in extraction, but at the same time increase energy consumption and production costs

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