Method for extracting and separating high-purity curcumin with low heavy-metal residues from turmeric

Abstract

The invention discloses a method for extracting and separating high-purity curcumin with low heavy-metal residues from turmeric. The method comprises the following steps of: firstly cleaning, drying and crushing turmeric into turmeric powder, and mixing the turmeric powder with an extraction solvent proportionally, heating, stirring and extracting; mixing extractive solutions, filtrating and separating, removing the filter residue to obtain filtrate, and concentrating the filtrate; cooling the remaining concentrated liquid, mixing the liquid with a crystallization solvent proportionally, and carrying out static crystallization in a suitable temperature range and filtrating the mixture to obtain wet crystal product; and finally mixing the crystallization solvent with water proportionally to prepare a mixed solvent, mixing the wet crystal product with the mixed solvent proportionally and recrystallizing, and separating to obtain high-purity curcumin with low heavy-metal residues. The technology provided by the invention can reduce the heavy metal content as much as possible while retaining effective natural ingredients of traditional Chinese medicine at the same time, and the technology has significant meaning in improving the standard system of safety control for traditional Chinese medicine, breaking the foreign technical barriers and really pushing traditional Chinese medicine to go onto the world market.

Description

【Technical field】 [0001] The invention relates to a method for extracting curcumin, in particular to a method for extracting and separating high-purity curcumin with low heavy metal residues from turmeric. 【Background technique】 [0002] Heavy metal residues in active extracts such as natural medicines, health products and health food additives extracted from plants have become the focus of attention at home and abroad, and it is necessary to control heavy metals in natural plant extracts. At present, the removal methods of heavy metals in turmeric plant active extracts are mainly focused on preventing traditional Chinese medicine from being polluted by heavy metals and the development of heavy metal purification technology. [0003] Methods to prevent Chinese medicine from being polluted by heavy metals include: a. Reasonable selection of planting bases, planting Chinese medicines in bases that meet environmental standards; b. Studying the characteristics of Chinese medicin...

AI Technical Summary

Problems solved by technology

[0005] In view of the technical defects that the purification of heavy metals in the existing curcumin extraction technology is not thorough enough, the process is complex, the purity is low, and the quality of the product is unstable, the purpose of the present invention is to provide a method that can thoroughly purify heavy metals, has simple technology, Curcumin extraction method with high purity and stable product quality