Pomegranate peel extracting solution heavy metal treatment and punicalagin purification method

Abstract

The invention belongs to the technical field of extraction and purification of plant effective components, and discloses a pomegranate peel extracting solution heavy metal treatment and punicalagin purification method. The method comprises the following steps of preparing a pomegranate peel extracting solution by using continuous countercurrent extraction equipment, adsorbing the pomegranate peel extracting solution by using a heavy metal special adsorbent, separating punicalagin in the pomegranate peel extracting solution through column chromatography, decolorizing with activated carbon, and purifying with acetone to obtain the punicalagin. The punicalagin is extracted in a continuous countercurrent extraction mode, and heavy metals in the pomegranate peel extracting solution are adsorbed in combination with the special heavy metal adsorbent, so that the limitation of selection of high-quality pomegranate peel raw materials is broken through, the prepared punicalagin is high in content, the heavy metals meet the use requirements of food addition and cosmetics, the method provides data support for producing punicalagin products by large flat-turn extraction equipment, is simple and feasible in process, adopts purified water for extraction and separation, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of extracting and purifying plant active ingredients, and in particular relates to a method for treating heavy metals in a pomegranate peel extract and purifying punicalagin. Background technique [0002] The molecular formula of punicalagin (C 48 h 28 o 30 ): [0003] [0004] Pomegranate peel is the dried peel of pomegranate, a plant of the pomegranate family. It is sour in nature, astringent, warm in nature, slightly poisonous, and belongs to the large intestine meridian. Currently, pomegranate peels are produced in Huaiyuan, Anhui, Huili, Sichuan, Mengzi and Huize, Yunnan, Zaozhuang, Shandong, Yecheng, Xinjiang, and Lintong, Shaanxi. Pomegranate peels and Lintong, Shaanxi have a high content of punicalagin. The yellow thin skins in Lintong, Shaanxi and Weinan have the highest content of punicalagin. However, heavy metals in pomegranate peels are high, reaching more than 1.5ppm. Therefore, while so...

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Problems solved by technology

[0009] The difficulty of solving the above problems and defects is: 1. The pomegranate peel extract content prepared by conventional methods is difficult to reach more than 60%. This product requires high quality raw materials. The high content of raw materials makes product purification easy. The level of raw materials in the market is uneven, and the freight cost of raw materials is increasing now, so the raw materials are produced in Lintong, Shaanxi, and the product content is high. This method overcomes the defect of high heavy metal Hg in raw materials; 2. Generally, the cost of removing heavy metals is relatively high , the difficulty of this technology is that it is technically difficult to solve the removal of heavy metals at low cost, it is difficult to screen special reagents, and the usage and dosage are suitable for large-scale production; 3. The reagents used in this technology are mainly purified water, the only one used Acetone is replaced with purified water in the process of technical implementation, so that there is no product with any solvent residue, and the content is high. The difficulty of this method lies in the need to strictly control the heating temperature

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