A dynamic coupling extraction and targeted purification process for anthocyanins from purple rice husks

CN122079948APending Publication Date: 2026-05-26HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2026-04-15
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional methods for extracting anthocyanins from purple rice husks are inefficient and produce insufficient purity. High-temperature alcohol extraction leads to the degradation of active ingredients, and the use of high-concentration ethanol increases the environmental burden.

Method used

Low-temperature dynamic coupling extraction technology was employed, using a composite solvent system of 40% ethanol, 0.1% citric acid, and 0.05% ascorbic acid, combined with ultrasonic and microwave treatment, followed by targeted purification through an AB-8 macroporous resin chromatography column, with the temperature controlled below 50℃, to achieve efficient extraction and purification of anthocyanins.

Benefits of technology

It improves the extraction rate and purity of anthocyanins, reduces solvent consumption and environmental pollution, shortens the production cycle, and meets the long-term stability requirements of active ingredients in pharmaceutical preparations.

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Abstract

This invention discloses a dynamic coupling extraction and targeted purification process for anthocyanins from purple rice husks, belonging to the field of natural product extraction technology. This invention aims to solve the technical problems of low extraction efficiency, easy degradation of heat-sensitive active ingredients, insufficient product purity, and high solvent consumption and environmental burden in traditional purple rice anthocyanin extraction processes. The method includes: 1. Raw material pretreatment; 2. Dynamic coupling extraction; 3. Targeted purification and precision drying. The high-activity anthocyanins prepared by this method have an anthocyanin purity ≥65%. This process has a production cycle of only 1.5 hours, reduces solvent consumption by 40%, and the obtained high-activity anthocyanins can be widely used in functional foods, pharmaceutical antioxidants, and anti-aging cosmetics, providing a green and efficient industrial solution for the high-value development of purple rice resources.
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