Curcuma longa extract and preparation method thereof

Abstract

The invention discloses a curcuma longa extract and a preparation method thereof. The preparation method comprises the following steps: (1) extraction: pulverizing a curcuma longa raw material, weighing the raw material, adding 80% ethanol, refluxing, stirring and extracting; (2) filtering: filtering with filter cloth; (3) concentration: concentrating the filtrate under reduced pressure until no solvent smell exists; (4) extraction: adding petroleum ether into a concentrated solution, and performing extraction; (5) crystallization: heating and dissolving mother liquor with 50% ethanol, and filtering to obtain a primary crystallization product; (6) recrystallization: adding 70% ethanol into the primary crystallization product, heating to dissolve, and filtering to obtain a secondary crystallization product; and (7) drying: performing forced air drying on the secondary crystallization product to obtain a finished product. According to the method, ethanol reflux extraction is adopted, themethod is safe, non-toxic and good in stability and repeatability, and the product has high content (the total curcumin content is larger than or equal to 97%). Besides, ethanol extraction and petroleum ether degreasing are adopted, and hydrous ethanol is used for crystallization twice, so that the yield can be increased, and the extraction period can be shortened.

Description

technical field [0001] The invention relates to the technical field of plant extraction, in particular to a turmeric extract and a preparation method thereof. Background technique [0002] Turmeric (Curcuma longa L.) has another name called turmeric, and its medicinal part is the rhizome, and its main production areas are Japan, the United States, and China. Curcumin (total curcumin) in turmeric is a natural pigment extracted from turmeric and is the main active ingredient of turmeric, including curcumin, demethoxycurcumin and bisdemethoxycurcumin, which have many High medicinal efficacy and nutritional value, it is widely used, generally used in food additives, traditional Chinese medicine believes that it has the effects of promoting qi, dispersing wind and blood circulation, stimulating menstruation and relieving pain. [0003] The existing technology uses acetone to extract, which is flammable and easy to pollute the environment; there is also a resin column, but there ...

AI Technical Summary

Problems solved by technology

[0003] The existing technology uses acetone to extract, which is flammable and easy to pollute the environment; there is also a resin column, but there are many by-products, and the purity is not up to, the yield is low, and crystallization is required once, the overall process is more cumbersome, and the production cycle is long. ,low efficiency

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